Electricity: circuit makers and breakers – Weight – Treads
Patent
1983-01-10
1984-06-19
Scott, J. R.
Electricity: circuit makers and breakers
Weight
Treads
H01H 302
Patent
active
044554656
ABSTRACT:
A treadle switch assembly is formed of elongated treadle switch members disposed parallel to one another in a pan or tray embedded or otherwise disposed on a roadway surface. These individual treadle switch members are held in place in dovetail fashion by elongated retaining bars which can be bolted in place and by cooperating undercut members formed or longitudinally affixed on the tray. Favorably, the treadle switch members are of trapezoidal cross section, and the retaining bars are of a complementary trapezoidal cross section. This arrangement facilitates removal of a single treadle switch member when the same becomes worn or defective, merely by removing a single one of the retaining bars, thereby obviating the need to replace the entire assembly.
REFERENCES:
patent: 2165227 (1939-07-01), Cooper
patent: 2166090 (1939-07-01), Cooper
patent: 2205555 (1940-06-01), Cooper
patent: 2244933 (1941-06-01), Armstrong
patent: 2251351 (1941-08-01), Cooper
patent: 2287090 (1942-06-01), Cooper
patent: 2293932 (1942-08-01), Cooper
patent: 2293933 (1942-08-01), Cooper
patent: 2313627 (1943-03-01), Cooper
patent: 2761928 (1956-09-01), Cooper et al.
patent: 2813164 (1957-11-01), Durbin
Automatic Toll Systems, Inc.
Robinson, Jr. Lee C.
Scott J. R.
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