Induction Coils

Français : Bobine de Ruhmkorff

Français : Émetteur à bobine de Ruhmkorff (utilisé jusqu'à 1905. English: Spark-gap radio transmitter circuit using induction (Ruhmkorff) coil (used around 1905)

Wehnelt interrupterČeština: Wehneltův přerušovač Public domain photograph related to electric instruments, free to use, no copyright restrictions image - Picryl description

A large induction coil made in 1877 by British instrument maker Alfred Apps for British scientist William Spottiswoode. One of the largest induction coils ever constructed, it could produce a spark 42 inches ( More

Student's Reference Book, Chicago, F. E. Compton and Company 1914

Adjustable sledge coil (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg

Auto-induction experiment (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg

The first induction coil, built by Irish scientist and Catholic priest Nicholas Callan in 1836 at St. Patrick's College, Maynooth, Ireland. It is still preserved by the college. It consisted of a horseshoe- More

Français : Fig. 20. — Bobine d'induction. English: Induction coil. For insulation, the coil is encased in wax inside the wooden box. The interrupter is not shown, so it apparently uses an external interrupter.

Français : Nouvel appareil à induction, construit par Ruhmkorff

Dansk: "Opfindelsernes Bog" 1878 af André Lütken, Fig. 340. Ruhmkorffs Induktionsapparat. English: "Opfindelsernes Bog" (Book of inventions) 1878 by André Lütken, Ill. 340.

Testing lighting Public domain photograph of electrical equipment, power lines, engine, free to use, no copyright restrictions image - Picryl description

Discharge of a Ruhmkorff induction coil

"D'Arsonval apparatus", invented by French physicist and doctor Jacque Arsene D'Arsonval around 1890 used in an obsolete Victorian-era medical field called electrotherapy. It was a high frequency resonant "osc More

Heinrich Daniel Ruhmkorff's induction coil. The mechanisms at the ends are interrupters, vibrating switches that interrupt the DC current flowing in the primary winding of the coil to create the flux changes More

Ruhmkorff's induction spark coil (text) Public domain photograph related to the history of Germany, free to use, no copyright restrictions image - Picryl description

Identifier: manualofpractica00turn (find matches) Title: A manual of practical medical electricity : the Röntgen rays and Finsen light Year: 1902 (1900s) Authors: Turner, Dawson Subjects: X-Rays Electrophys More

Identifier: corelessinductio00smit (find matches) Title: Core-less induction coils in telephone service Year: 1907 (1900s) Authors: Smith, Claude E Stewart, Walter M Subjects: Induction coils Telephone Tele More

Identifier: corelessinductio00smit (find matches) Title: Core-less induction coils in telephone service Year: 1907 (1900s) Authors: Smith, Claude E Stewart, Walter M Subjects: Induction coils Telephone Tele More

Identifier: corelessinductio00smit (find matches) Title: Core-less induction coils in telephone service Year: 1907 (1900s) Authors: Smith, Claude E Stewart, Walter M Subjects: Induction coils Telephone Tele More

Identifier: corelessinductio00smit (find matches) Title: Core-less induction coils in telephone service Year: 1907 (1900s) Authors: Smith, Claude E Stewart, Walter M Subjects: Induction coils Telephone Tele More

Identifier: corelessinductio00smit (find matches) Title: Core-less induction coils in telephone service Year: 1907 (1900s) Authors: Smith, Claude E Stewart, Walter M Subjects: Induction coils Telephone Tele More

Identifier: inductioncoilsho00schn (find matches) Title: Induction coils : how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and pract More

Identifier: practicalelectro00mart (find matches) Title: Practical electro-therapeutics and X-ray therapy : with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of More

Identifier: roentgeninductio00jame (find matches) Title: Roentgen induction coils for quick work Year: 1903 (1900s) Authors: James G. Biddle Company Subjects: X-rays Induction coils Radiography Publisher: More

Identifier: roentgeninductio00jame (find matches) Title: Roentgen induction coils for quick work Year: 1903 (1900s) Authors: James G. Biddle Company Subjects: X-rays Induction coils Radiography Publisher: More

Identifier: roentgeninductio00jame (find matches) Title: Roentgen induction coils for quick work Year: 1903 (1900s) Authors: James G. Biddle Company Subjects: X-rays Induction coils Radiography Publisher: More

Identifier: roentgeninductio00jame (find matches) Title: Roentgen induction coils for quick work Year: 1903 (1900s) Authors: James G. Biddle Company Subjects: X-rays Induction coils Radiography Publisher: More

Identifier: electrotherapeut00benn (find matches) Title: The electro-therapeutic guide, or, A thousand questions asked and answered Year: 1907 (1900s) Authors: Bennett, Homer Clark, 1865-1928 Subjects: Elec More

Français : Émetteur à bobine de Ruhmkorff à excitation directe. Guglielmo Marconi expérimente les premières liaisons hertziennes à la Villa Griffone en Italie en télégraphie sans fil à Salvan (Valais) dans le More

Diagram of a spark-gap transmitter, the first widely used type of radio transmitter, used to send Morse code signals during the "wireless telegraphy" era between 1900 and 1920. This example, from a 1917 boy's More

Diagram of a spark-gap transmitter, the first widely used type of radio transmitter, used to send Morse code signals during the "wireless telegraphy" era between 1900 and 1920. This example, from a 1917 boy's More