International Library of Technology · Scranton, International Textbook Co. · leaf 99
le. A cheap and simple switch, which will answer the aboverequirements, may be easily made with the followingmaterials: 1 piece of pine board about 3 in. X 5 in. X |- in. 1 piece of wood about |- in. X f in. X 3 in. 9 round-head brass wood screws, f in., No, 8. 2 round-head brass wood screws, |-… … Fig. 934.-Fig. 934 shows the position of the screw holes for the f-inscrews on the board. 1534 PRINCIPLES OF Fig. 935 represents the switch with the brass strips in posi-tion. The small block of wood fin. Xf in. X 3 in. is shown at
Electrical engineering
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