Pass & Seymour cut-outs

[Trade Journal]

Publication: The Electrical Engineer

New York, NY, United States
vol. 16, no. 288, p. 419,420, col. 1,1-2





The accompanying illustrations show a novelty in arc cut-outs made by Messrs. Pass & Seymour, of Syracuse, N. Y. Fig. 1 shows the apparatus complete. The case, cover and circuit breaking cam, are all made of china, which removes the liability of grounding the circuit in wet weather, and gives an insulation impossible in cut-outs with metallic cases. It is ornamental and only 7 inches in diameter. The handle is nickelplated and can be operated by cords without the use of pulleys; or a pole or hook can be used, if desirable.

Fig. 2 shows the lamp circuit off. The line circuit is made through the contacts F and H and the plate D, and also through the lever A. By turning the handle, the china cam B is turned to the right, carrying the plates D and C with it, and passing between the contact F and the lever A, breaking the line circuit and throwing in the lamp circuit as shown in Fig. 3.


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There can be no arcing on plates C or D when the line circuit is broken, as D leaves H before B opens the circuit, by passing between F and A. The cam B is moved very quickly by means of the torsion spring on the handle post, and as it passes between A and F the arc is pushed out, as well as blown out, by the puff of air produced by the sudden motion of B. The plates C and D are held against the contacts by three spiral springs under each, and a perfect rubbing contact is made. The clamps for the line wires have two heavy screws in each, and also nut and spiral spring as shown at E, Fig. 2, which insures a good contact at the connection.


Keywords:Pass & Seymour : Need Image
Researcher notes: 
Supplemental information: 
Researcher:Bob Stahr
Date completed:April 14, 2011 by: Bob Stahr;