Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances (1918) (14593266649)

Identifier: mechanicsofhouse00keen (find matches)

Title: Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances

Year: 1918 (1910s)

Authors: Keene, E. S. (Edward Spencer), b. 1864

Subjects: Heating Lighting Plumbing

Publisher: New York, McGraw-Hill book company, inc.

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress

Text Appearing Before Image:

eaters for the ovens and stove top.The part >S shows the switches attached to the heaters ofthe stove top, which is raised to show the connecting wires. Inthe larger oven there are two heaters of 1000 watts each, and inthe smaller oven one heater of 850 watts. Each heater may becontrolled separately with a switch giving three regulations ofheat—high, medium and low. The advantage of this arrange-ment lies in the fact that one can set the two heaters in the ovenat different temperatures which will permit either a slow or quick 340 MECHANICS OF THE HOUSEHOLD heat, but when the predetermined temperature is reached thecurrent will be automatically cut off by the circuit-breakers.Such flexibility of heat control in the ovens permits the operatorto apply heat at both top and bottom for baking and roastingat just the desired temperature. This arrangement also avoidsthe danger of scorching food from concentration of heat, andwarping utensils or the hnings of the oven. All oven heaters on

Text Appearing After Image:

Fig. 236.—Electric range. Showing how all parts can be removed for cleaningand replacement. the automatic ranges are further controlled and mastered by thecircuit-breakers. Intercommunicating Telephones.—This form of telephone isused over short distances such as from room to room in buildingsor for connecting the house with the stable, garage, etc. It iscomplete, in that it possesses the same features as any othertelephone but the signal is an electric call-bell instead of thepolarized electric bell used in commercial telephone service. ELECTRICITY 341 Any telephone is made to perform two functions: (1) that ofa signal with which to call attention; and (2) the apparatusrequired to transmit spoken words. In the intercommunicatingtelephone or interphone, the signal is made like any call-bell andparts are similar to those described under electric signals. Thebell-ringing mechanism is included in the box with the trans-mitting apparatus and the signal is made by pressing a pushbutton.

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1918

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