208 Inventor Image: PICRYL - Public Domain Media Search Engine Public Domain Search}

Minerva, inventor of armour, gives it to soldiers

Public domain scan of a medieval illuminated manuscript page, free to use, no copyright restrictions image - Picryl description.

The virgin and child leonardo de vinci boiler and jesus, emotions.

[Allegorical representation of Time rewarding Industry and punishing Indolence] / M. de vos, inventor ; R. Sadler [sic] scalps. et excud.

Bradley Collection. Inscription: Praemia virtutum .. Pigritiae. Public domain scan of 16th-century drawing, free to use, no copyright restrictions image - Picryl description

A painting of a man reading a book. Benjamin franklin 1767 writer. - Public domain portrait painting

A painting of a man reading a book

David Octavius Hill - James Nasmyth, 1808 - 1890. Inventor of the steam hammer

Robert Adamson, David Octavius Hill..about 1844..Accession no. PGP HA 541 .Medium Calotype print .Size 19.90 x 15.20 cm .Credit Provenance unknown . PGP HA 541 ) . David Octavius Hill was a Scottish painter an More

[John Heathcoat, inventor of the knitting machine]

Japanese print showing Heathcoat displaying the first successful result from his knitting machine to his wife. Annotations, stamps, etc. on verso of print: 163; 47623a (white label); LC2585; 42; typescript cap More

[Map of Mexico City and environs, showing some buildings] / Samuel Estradanus sculptist, Didac Cisneros inventor

Engraving by Samuel Estradanus. Illus. in: Diego Cisneros' Sitio, naturaleza y propriedades dela Ciudad de Mexico (1618). Reference copy may be in Geog. File (Graphics) Mexico Mexico City. This record contains More

To the public. The undersigned, inventor of the marble slab coffins, having taken the initiatory steps to secure his rights by letters patent of the United States is now prepared to dispose of rights either by license to build or for territory.

Available also through the Library of Congress web site in two forms: as facsimile page images and as full text in SGML. Printed Ephemera Collection; Portfolio 201, Folder 7.

Nasmyth's patent steam hammer, copied by permission of the inventor from the machine in the great exhibition

Illus. in: Cyclopædia of useful arts, mechanical and chemical, manufactures, mining, and engineering / ed. by Charles Tomlinson.... London : New York, G. Virtue & co., 1854. Published in: The tradition of tech More

Porträtt av Alfred Nobel 30 år, uppfinnare, industriman och donator (Nobelpriset).

Porträtt av Alfred Nobel i en medaljong.

Porträtt av Alfred Nobel i en medaljong. Public domain scan - bust portrait, free to use, no copyright restrictions image - Picryl description

Motiv från Svenska AB Nobel-Diesel. I mitten Alfred Nobel.

Motiv från Svenska AB Nobel-Diesel. I mitten Alfred Nobel. Public domain image of the industrial revolution, 19th-century, historical photograph, Sweden, free to use, no copyright restrictions image - Picryl description

Alfred Nobel., Russian Empire. Jarnvagsmuseet, Sweden

Alfred Nobel. Public domain photograph - male portrait, Swedish railways, 1900s Sweden, free to use, no copyright restrictions image - Picryl description

Announcement. To give those interested in physical culture an opportunity to test the benefits and social advantages of the exercise derived from the use of the Plimpton Skate the inventor has hired and fitted the rooms at No. 652 Washington Str

Available also through the Library of Congress web site in two forms: as facsimile page images and as full text in SGML. Printed Ephemera Collection; Portfolio 71, Folder 24.

Porträtt av Gustaf Dalén 1869. - Public domain portrait photograph

Porträtt av Gustaf Dalén 1869. Public domain historical portrait photograph, Scandinavian, free to use, no copyright restrictions image - Picryl description

Lee de Forest (amerikan) 1873 - 1961. Uppfinnare av 3-elektrodröret.

Prof. S.F.B. Morse. The great inventor of the telegraph

Picryl description: Public domain image of a statue, monument, sculpture, free to use, no copyright restrictions.

[James Buchanan Eads, engineer and inventor of ironclad warships, head-and-shoulders portrait, facing left] / Williams & Cornwell.

Reference copy in BIOG FILE. Public domain photograph - Portrait, United States, free to use, no copyright restrictions image - Picryl description

Alois Senefelder inventor of lithography, engraving, Library of Congress

Public domain reproduction of art print, free to use, no copyright restrictions image - Picryl description

A black and white photo of a man sitting at a table. Inventor thomas alva edison portrait.

Innovation image. Free images about innovations. Use free pictures of innovations without any copyright restrictions.

Jan Matzeliger portrait collection

Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.

Porträtt av Alfred Nobel. - Public domain portrait photograph

Porträtt av Alfred Nobel. Public domain historical portrait photograph, Scandinavian, free to use, no copyright restrictions image - Picryl description

Porträtt i profil av Alfred Nobel.

Porträtt av Alfred Nobel. - Public domain portrait photograph

Porträtt av Alfred Nobel. Public domain historical portrait photograph, Scandinavian, free to use, no copyright restrictions image - Picryl description

American author, printer, political theorist, politician, postmaster, scientist, inventor, civic activist, statesman and diplomat from "The Building of the Empire: the story of England's growth from Elizabeth to Victoria. With ... illustrations, etc"

This image has been taken from scan 000172 from volume 02 of "The Building of the Empire: the story of England's growth from Elizabeth to Victoria. With ... illustrations, etc". The title and subject terms of t More

John Philipp Reis 1834 - 1874. Tysk vetenskapsman och uppfinnare. År 1861, han konstruerade den första telefonen ( Reis telefon ).

Thorsten Nordenfelt i Arildsläge.

Thorsten Nordenfelt i Arildsläge. Public domain historical portrait photograph, Scandinavian, free to use, no copyright restrictions image - Picryl description

Ingenjör Axel Wellin. Fotograf: Elliot ? (Se kort för att tyda fotografens namn).

Diodens uppfinnare Lee de Forest vid sin radiotelefoni- sändare.

Elektrisk belysning allmänt. Porträtt av Sir Joseph Wilson Swan. Den engelske uppfinnaren av den elektriska glödlampan.

Victor Popp, uppfinnare inom radio. Popov.

Porträtt av Jonas Hesselman. - Public domain portrait photograph

Porträtt av Jonas Hesselman. Public domain photograph - portrait, Sweden, free to use, no copyright restrictions image - Picryl description

On job. Washington, D.C. Jan. 19. Charles Edison, son of the famous inventor and new Assistant Secretary of the Navy, pictured at his desk today. He was inducted into office yesterday

A black and white photo of a man sitting at a desk. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Telegrafassistent Lars Carlander. Uppfinnare av snabbtelegraf. F. 20/2 1844 d. 13/2 1894.

Porträtt av uppfinnare Wilhelm Lindqvist.

Porträtt av uppfinnare Wilhelm Lindqvist. Public domain historical portrait photograph, Scandinavian, free to use, no copyright restrictions image - Picryl description

Porträtt av Nikola Tesla. - Public domain portrait photograph

Porträtt av Nikola Tesla. Public domain historical portrait photograph, Scandinavian, free to use, no copyright restrictions image - Picryl description

Porträtt av Alfred Nobel. - Public domain portrait print

Porträtt av Alfred Nobel. Public domain photograph of 19th-century portrait, Sweden, free to use, no copyright restrictions image - Picryl description

Porträtt av P. A. Aronsson spelandes piano.

Tre generationer konstruktörer.Alrik Hult t h, Ivan Cedermark och Vigg Romell

Visitkort med porträtt av uppfinnaren Martin Wiberg.

The most famous inventor of the age--Thomas A. Edison in his laboratory, East Orange, N.J., U.S.A.

Thomas Alva Edison, half-length portrait, standing in his laboratory, facing slightly left. H4733 U.S. Copyright Office.

[Thomas Alva Edison, 1847-1931, three-quarter length portrait, standing, in laboratory]

Photo copyrighted by Pach. This record contains unverified, old data from caption card.

Thomas Alva Edison on cover of Scientific American.

Public domain scan of newspaper clippings, periodicals, free to use, no copyright restrictions - Picryl description.

Dr. Chas. E. Monroe, Inventor of [...]

A black and white photo of a man with a mustache. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Edison takes oath as Secretary of Navy. Washington, D.C., Jan. 2. Charles Edison, son of the late inventor, Thomas Edison, was today sworn in as the 46th Secretary of the Navy to succeed the late Secretary Claude A. Swanson. Edison is the second man to become Secretary of the Navy after serving as Assistant Secretary, the other was Truman Newberry, who became Secretary in December, 1908. Left to right: Mrs. Charles Edison, Secretary of War Harry H. Woodring, Secretary Edison, and Rear Admiral Walter B. Woodson, Judge Advocate General, administering the oath

Picryl description: Public domain historical photo of Washington DC during the First World War, free to use, no copyright restrictions image.

James D. Halloran, a fireman attached to Engine Company no. 20 of this city (N.Y.) is the inventor ... smoke mask ...

3 firemen wearing masks. J161786 U.S. Copyright Office Photo copyrighted by Underwood & Underwood. Copyright not renewed. This record contains unverified, old data from caption card. Caption card tracings: BI I More

Editors Honor Memory of Deceased Inventor [Dayton Daily News, 3 June 1912]

Public domain scan of newspaper clippings, periodicals, free to use, no copyright restrictions - Picryl description.

HAMMOND, JOHN HAYS, JR. [i.e., SR.] INVENTOR

Photo shows John Hays Hammond, Sr., (1855-1936) based on similarity to his 1911 portrait in the National Photo Co. Collection (Source: C. Arms, 2011)

[Thomas Alva Edison, full-length portrait, seated, facing front, between two phonograph cabinets, one of which is made of concrete]

J166749 U.S. Copyright Office. Public domain photograph of bureau, cabinet, furniture, free to use, no copyright restrictions image - Picryl description

[Hiram Percy Maxim, inventor, head-and-shoulders portrait, facing left]

J193785 U.S. Copyright Office. Public domain photograph - Portrait, United States, free to use, no copyright restrictions image - Picryl description

[John Taliaferro Thompson, U.S. Army officer, founder of the Auto-Ordnance Corporation, and inventor of the Thompson submachine gun]

J209480 U.S. Copyright Office. Photographer's name and location from Catalog of Copyright Entries: Works of art..., Volume 10, p. 548.

ARMY, U.S. WIRE CUTTING MACHINE WITH INVENTOR, JOHN E. LOGAN

A group of men standing around a wooden box. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Alfred Nobel, The Swedish inventor of Dynamite

Title, date and notes from Red Cross caption card. Photographer name or source of original from caption card or negative sleeve: ARC, Red Cross Mag. Group title: Personnel. Sweden. Used in: Red Cross of the Wor More

PRIDHAM, S. INVENTOR OF MEGAPHONE

A black and white photo of a man in a suit. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

New ether - a great medical discovery. ... Dr. J.H. Cotton, the inventor, is seen experimenting with the ether in a Boston hospital [on cat; with 2 other men] 1920

Photo copyrighted by Underwood & Underwood. This record contains unverified, old data from caption card. Caption card tracings: Mass. Boston Misc.; Medicine; BI; Photog. I.; Laboratory animals; Ansethesia; Medi More

[Thomas Edison, half-length portrait, facing left and looking down into glass, experimenting in his laboratory]

J239947 U.S. Copyright Office. Copyright by T.A.E. Inc. Public domain photograph - Portrait, United States, free to use, no copyright restrictions image - Picryl description

A black and white photo of a man in a suit. Thomas alva edison inventor 1922.

Stock photography: A man in a suit and tie sitting on a stool / A black and white photo of a man in a suit.

In recognition of his having conducted the most successful radio show in the U.S. Alfred Stern, director of Washington's first radio show, was presented with this elaborate loop antenna by Dr. J. Harris Rogers, famous inventor. It is estimated that 50,000 persons attended this exhibition

Public domain photograph related to architecture, free to use, no copyright restrictions image - Picryl description

The latest in electric baseball scoreboards. George Coleman, inventor of Wash., is shown with the mechanism of the new scoreboard

A man standing in front of a wall of wine bottles. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Abraham Lincoln an inventor - Public domain portrait photograph

A man in a suit holding a model of a fence. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Tomm Brown, who claims to have had the first saxaphone act, posed with 1st saxaphone made by Adolph Sax, the inventor

1/2, standing, (6 - facing right - right side of face is most visible). Title and other information transcribed from caption card and item. In album: Washington, D.C., 1922, v. 4, Herbert E. French, National Ph More

New quick drying defense huts demonstrated to government officials. Washington, D.C., Aug. 25. By means of a new invention known as the vacuum concrete process, a pill box fort was erected on the grounds of the National Bureau of Standards today in the record time of four hours. The purpose of the demonstration was to show a new and more efficient method of construction for defense purposes under emergencies. K.P. billner (right) inventor of the process, is pictured explaining it to Dr. Lyman Briggs, ([...])Director of the Bureau of Standards, and [..] Monroe Johnson, Assistant Secretary of Commerce

A group of men standing next to each other. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Marconi (Inventor of Radio) - Public domain dedication image

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Col. Lindbergh receives Harmon trophy. The highlight of today's session of the International Civil Aeronautics Conference was the presentation of the Harmon Trophy to Col. Charles A. Lindbergh, America's air ace. The trophy is awarded annually by the International League of Aviators to the man voted to have done the most for aeronautics that year In the photograph, left to right: William McCracken, Assistant Secretary of Commerce for Aviation; Pierre Etienne Flandin, Vice President of the International League of Aviators and chief of the French delegation to the air conference, who presented the trophy; Col. Lindbergh; and Orville Wright, Inventor of the first airplane in America

Public domain portrait photograph, France, free to use, no copyright restrictions image - Picryl description

Inventor of America's first flying machine attends International Civil Aeronautics Conference. Orville Wright, one of the famous Wright brothers who made the first flight in America 25 years ago, was given a hearty greeting by the delegates from all over the world when he arrived to attend the first session of the International Civil Aeronautics Conference in Washington today. In this picture Mr. Wright (right) is shaking hands with William F. Whiting, Secretary of Commerce

A group of men standing next to each other. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Inventor of microphone to receive Franklin Gold Medal. On May 15th, Emile Berliner, Washington Scientist, will appear for the third time [...] the Franklin Institute of Philadelphia, this time to receive their highest award, the Franklin Gold Medal. Diaphramed walls for perfecting acoustics in auditoriums is his latest achievement to attract their attention. His disc talking machine is, of course, known the world over, he is best known as the inventor of the microphone

A black and white photo of a man sitting at a table. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description Emile Berliner 1851 – 1929 was a German-born American More

Brains of Aeronautic World represented on National Advisory Committee for Aeronautics. The National Advisory Committee for Aeronautics is photographed in Washington the other day when they met at the Navy Department. The duties of the Committee, as provided by Congress, are to supervise and direct the scientific study of the problems of flight, with a view to their practical solution. In the photograph, left to right: G.W. Lewis; Charles G. Abbet, Secretary of the Smithsonian Institution; Orville Wright, Inventor of the airplane; Commander John H. Towers; U.S.N., here of the first trans-atlantic flight in 1919; Joseph S. Amos, Chairman; Brig. General Benjamin D. Foulois, first U.S. Army Aviator; William P. MacCracken, former Secretary of Commerce for Aviation; Charles F. Marvin, Chief U.S. Weather Bureau; David W. Taylor, Vice Chairman. Standing is John F. Victory, Secretary

A group of men sitting around a table. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Washington inventor says ignition interference from airplane engines is a myth. Ignition interference from airplane engines on aircraft is largely a myth according to C. Francis Jenkins, Washington, D.C., inventor who has designed a radio receiving set which he does not pick up noises from a flying power plant. In this photograph is shown Mr. Jenkins (right) and his laboratory assistant

Picryl description: Public domain image of an aircraft, aviator, 1910s-1920s, early 20th-century aviation, free to use, no copyright restrictions.

Study Johnson semi-automatic rifle. Washington, D.C., May 29. Senator Morris Sheppard, left, Chairman of the Senate Military Affairs Committee, Maj. General George A. Lynch, U.S. Chief of Infantry, and Senator A.B. Chandler of Kentucky, inspect the Johnson semi-automatic rifle which may replace the Garand gas-operated rifle as the Army's standard shoulder weapon. Capt. Melvin M. Johnson, inventor of the Johnson rifle, told the Senate Military Affairs today when it began consideration of a bill to change the Army's standard shoulder weapon, that his rifle could be manufactured more rapidly than the Garand

A group of men sitting around a table with guns. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Alfred Nobel Skulptur. Jarnvagsmuseet, Sweden

Alfred Nobel Skulptur Public domain photograph - group portrait, the 1900s Sweden, free to use, no copyright restrictions image - Picryl description

A Veteran Inventor. About 6 miles from Washington, on the edge of the little hamlet of Hyattsville, Md., may be found Dr. James Harris Rogers, wizard inventor, now 80 years old, retired from his work but still erect and energetic It was Dr. Rogers, who during the war proved that water as well as earth and air is a medium for the transmission of electro-magnetic waves. Through the "well" located on his property, high officials heard German official reports

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Inventor of microphone to receive Franklin Gold Medal. On May 15th, Emile Berliner, Washington Scientist, will appear for the third time ... the Franklin Institute of Philadelphia, this time to receive their highest award, the Franklin Gold Medal. Diaphramed walls for perfecting acoustics in auditoriums is his latest achievement to attract their attention. His disc talking machine is, of course, known the world over, he is best known as the inventor of the microphone

A black and white photo of a man sitting at a table, Library of Congress Harris and Ewing collection Title from unverified caption data on negative or negative sleeve. On sleeve: Watch Your Credit Line. Gift; More

Exhibits famous Gutenberg Bible. Herbert Putnam, Librarian of the Library of Congress, exhibits the famous Gutenberg Bible, printed about 1450 by John Gutenberg, the inventor of printing. The Bible is a part of the Vollbehr collection, brought to the United States this year by a special Congressional approriation and now open th the public at the Library. 12/15/30

Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

A black and white photo of three women and a man. Sigrid gurie charles boyer hedy lamarr.

And in the girl from the west ( 1932 ) / A still from the film / Public domain vintage photo.

Three way vehicle boom. This is what is left of a tri-phibian, a device intended to fly in the air, run on the highway, or through the water. The inventor, ... Viachos of Washington, was in it when it blew up. Now he is in the hospital. A.M. Crumpler, shown here with Mrs. Viachos, helped pull the inventor from the wreckage. It did not get into the air. 102535

A woman standing next to a car with a bike on it, Library of Congress Harris and Ewing collection Title from unverified caption data on negative or negative sleeve. On sleeve: Harris & Ewing photos. Gift; Harr More

Three way vehicle boom. This is what is left of a tri-phibian, a device intended to fly in the air, run on the highway, or through the water. The inventor, [...] Viachos of Washington, was in it when it blew up. Now he is in the hospital. A.M. Crumpler, shown here with Mrs. Viachos, helped pull the inventor from the wreckage. It did not get into the air. 10/25/35

A woman standing next to a car with a bike on it. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

In big gun deal. Maj. General George E. Leach, in plane, of the National Guard Bureau, flys to Indianapolis, Ind., where he will witness a demonstration on the speedway which will prove speed of a new type gun carriage being adopted by the Army. General Leach is bidding goodbye to A.F. Buquor of York, Pennsylvania, inventor of the new type adapter and carriage for the 75mm [field?] The Army is showing more concern in the speed at which its guns may be drawn since the announcement in Germany that Hitler's new army is geared to travel 80 miles per hour, 5/29/35

A black and white photo of a man standing next to an airplane. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

George Washington Carver, Chemist

The Harmon Foundation Collection: Kenneth Space Photographs of the Activities of Southern Black Americans

Sun refuses to be harnessed, Washington, D.C., September 8. The scheduled exhibition of Dr. Charles G. Abbott's sun ray machine was ruined today because there was too much sun. The intense heat, after being concentrated melted the solder connections. Dr. Abbott, the inventor, then went ahead to explain his device which is said to be capable of operating a half-horsepower steam engine by the sun's heat. The exhibition was held in honor of some of the delegates to the Third World Power Conference which is now being held here

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

First calculating machine presented to Smithsonian. Washington, D.C., March 31. An old macaroni box filled with an arrangement of wheels, rubber bands, meat skewers and staples which was the forerunner of the modern key-driven, multiple-order calculating machine, was presented to the Smithsonian Institution today. The scarred old box was designed and constructed by Dorr E. Felt, young Chicago mechanic, 52 years ago when he first started in to solve the problem of what is now the modern calculating machine. Mrs. Raymond J. Koch, (right) oldest daughter of the late inventor, is shown making the prsentation to Dr. Charles G. Abbot, Secretary of the Smithsonian Institution. In the center is Raymond J. Koch, 3/31/1937

A black and white photo of two people shaking hands. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Uppfinnaren Ragnar Carlstedt 1937 vid sin demonstartionstavla för olika Arcaregulatorer, en isntrumenttavla för olika reläer. I hans fabrik vid Bangårdsgatan 12 i Stockholm.

Boxes placed in Smithsonian in 1881 by telephone inventor opened for first time. Washington, D.C., Oct. Three boxes which Alexander Graham Bell, inventor of the telephone, and two associates placed in the secret archives of the Smithsonian Institution in 1881 and which have remained un?opened since, were formally opened today in the presence of Bell's two daughters and a group of scientists. The boxes contained among other things the original working model of the first machine ever to record on wax and reproduce the Human voice. In the photograph, left to right: Mrs. David Fairchild, daughter of the inventor; Mrs. Gilbert Grosvenor, another daughter; Alexander Graham Bell, great-grandson of Bell; T.H. Beard, Director or Research of the Dictaphone Co.; Dr. Charles Abbot, Secretary of the Smithsonian Institution; and H.W. Dorsey, also of the Smithsonian. 102737

A group of people standing around a table, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. Gener More

Boxes placed in Smithsonian in 1881 by telephone inventor opened for first time. Washington, D.C., Oct. Three boxes which Alexander Graham Bell, inventor of the telephone, and two associates placed in the secret archives of the Smithsonian Institution in 1881 and which have remained [un][?]opened since, were formally opened today in the presence of Bell's two daughters and a group of scientists. The boxes contained among other things the original working model of the first machine ever to record on wax and reproduce the Human voice. In the photograph, left to right: Mrs. David Fairchild, daughter of the inventor; Mrs. Gilbert Grosvenor, another daughter; Alexander Graham Bell, great-grandson of Bell; T.H. Beard, Director or Research of the Dictaphone Co.; Dr. Charles Abbot, Secretary of the Smithsonian Institution; and H.W. Dorsey, also of the Smithsonian. 10/27/37

A group of people standing around a table. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Mr. Wurtele, inventor of sugarcane harvester, attempting to repair the machine, Mix, Louisiana

Picryl description: Public domain photograph of farming, farmer, agriculture, 20th-century, free to use, no copyright restrictions.

A couple of men standing next to each other, Louisiana. Farmers during Great Depression

Picryl description: Public domain photograph of a farmer, 1930s great depression, dust bowl era, 20th century, free to use, no copyright restrictions.

Pill-Box Fort finished in four hours. Washington, D.C., Aug. 25. Something new in speedy-built forts was built on the grounds of the Bureau of Standards today in four hours. Karl P. Billner, Swedish Inventor, supervised the building of the pill box which was done by his new invention as the vacuum concrete invention. Mr. Billner, is looking over the finished product, 8/25/38

Public domain photograph of Washington DC, 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Pill-Box Fort built in four hours. Washington, D.C., Aug. 25. Something new in speedy-built forts was built on the grounds of the Bureau of Standards today in four hours. Karl P. Billner, Swedish Inventor, supervised the building of the pill box which was done by his new invention as the vacuum concrete invention. Today's demonstration was to show a new and more efficient method of construction for defense purposes under emergencies, 8/25/38

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Allen Ramsey Wurtele, second from left, inventor of mechanical sugarcane harvester with sugarcane experts who came up from General International Convention to see his harvester. Mix, Louisiana

Picryl description: Public domain photograph group portrait, free to use, no copyright restrictions.

Carlstedt, Ragnar. 60 år. Svensk ingenjör och uppfinnare. Carlstedt grundade 1908 firman Ragnar Carlstedt & co. för tillverkning av elektriska instrument.

Television inventor tells Economic Committee of difficulties in getting patents. Washington, D.C., Jan. 19. Philo T. Farnsworth, who conceived the principle of television when 14 years old came before the Temporary National Economic Committee today and told them that his firm, Farnsworth Television, Inc., has taken out 46 patents, has twice as many pending, and that more than 20 patent suits have resulted in which his firm was cleared in each case. Farnsworth is Vice President in charge of research in the Philadelphia firm. He is shown here with George Everson [?], Secretary of the company on his right, and Richard C. Patterson, Jr., Assistant Secretary of Commerce, 1/19/39

A black and white photo of three men in suits. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

The man behind the gun. John C. Garand, inventor of the semi-automatic rifle now being turned out in large quantities under the war program, looks over one of the guns

Public domain photograph - working class people, the 1930s United States, work, labor, worker, free to use, no copyright restrictions image - Picryl description

Monument to Capewell, the inventor of the famous horseshoe nail, in Cedar Hill Cemetery. Hartford, Connecticut

Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description

New machine to speed up statistics of census of 1940. Washington, D.C., Dec. 2. Back in 1870, it took 7 years to compile statistics from the facts taken by census takers, but in the next 10 years, Herman Hollerith invented a 'unit tabulator,' shown on left of photo being operated by Operator Ann Oliver. This machine is fed cards containing census information at the rate of 400 a minute and from these, 12 separate bits of statistical information is extracted. Not so long ago, Eugene M. La Boiteaux, Census Bureau inventor, turned out a smaller, more compact machine, which extracts 58 statistics from 150 cards per minute. This machine is shown on the right and is being operated by Virginia Balinger, Assistant Supervisor of the current Inquiry Section. With the aid of this machine, statistical information from the 1940 census is expected to be compiled in 2 1/2 years. The secret of the machine lies in the cards. The written information taken by census takers is brought in and the data translated into code numbers which are punched on the card, and the legible data is locked up in vaults away from prying eyes. Cards are fed into the machine, sensitive steel fingers feel out the punches, set up electrical impulses, and in no time at all, the card has set down on the large sheet just what statistic from each individual goes in what place

Picryl description: Public domain image of a bureau, office furniture, desk, chair, free to use, no copyright restrictions.

To save time in checking threads on a twenty-millimeter shell booster, a plant superintendent built this machine. It makes possible a speedy checking of thread accuracy in contrast to the old hand method. The inventor made the machine out of a fan base and a couple pieces of machine steel in a matter of hours. Months would have been necessary to buy such a machine on the market

Picryl description: Public domain photograph of costume accessory, free to use, no copyright restrictions image.

Lee De Forest, inventor (left) with Ernest Orlando Lawrence, taken September 8, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Lee De Forest, inventor (left) with Ernest Orlando Lawrence, taken September 8, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Vice-President of her local, United Electrical Radio and Machine Workers of America, Congress of Industrial Organization (CIO), Mary achieved the job of forelady by working as a hand at many varied operations. She has made a suggestion to conserve bakelite lamp bases, formerly discarded (a suggestion now in use at the plant), and is also the inventor of an apparatus which prevents short-circuiting during tests of lamps. Mary Petillo, forelady of a Newark, New Jersey factory making lamp bulbs and tubes for the Signal Corps, is an active member of her plant's Labor-Management drive to speed victory. She was elected from a plant personnel of 1700, 350 of them men

Picryl description: Public domain image of a political campaign, politician, meeting, 1930s, mid-20th-century United States, free to use, no copyright restrictions.

Springfield, Massachusetts. John C. Garand, inventor of the Garand rifle, pointing out some of the features of the rifle to Major General Charles M. Wesson during the general's visit to the Springfield arsenal. At right is Brigadier General Gilbert H. Stewart, commanding officer of the arsenal

Picryl description: Public domain image - Massachusetts in the 1910s, free to use, no copyright restrictions.

Dr. Bair aiding the war production drive by sawing steel billets is engineer, philosopher, psychologist, poet, inventor and sub-contractor! He lives with his son's family near the shop where he reduces steel billets to sizes required by a large forging plant

Public domain photograph of United States agriculture in the 1930s, country, farmer, farm, great depression, migration, dust bowl refugees, free to use, no copyright restrictions image - Picryl description

Dr. Bair. College professor and inventor saws steel billets to swell the volume for victory. He and his son use a homemade cart to wheel billets from the unloading point to power saws

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.