Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1974-09-27
1976-05-04
Hohauser, Herman
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 64, H01H 1708
Patent
active
039550583
ABSTRACT:
A ratchet switch including a switch wheel formed from an insulating material and having a plurality of electrically connected contact plates spaced about its periphery. Contact arms are flexed and biased against the switch wheel for establishing a circuit across contacted plates and for breaking said circuit when the wheel is moved to a position wherein the contact arms contact insulating spaces between the plates. At least a portion of each of the arms comprises a cantilever beam fixed at one end and free at the other and curving away from its contact plate from a line of tangency established between the plate and the beam, with any remaining portion of each arm lying in substantially parallel relationship with each plate. According to a preferred aspect of the invention, the line of tangency is closer to the edge of the plate adjacent the fixed end of the beam than to the edge of the plate adjacent the free end of the arm.
REFERENCES:
patent: 435024 (1890-08-01), Rockwell
patent: 497411 (1893-05-01), McGregory
patent: 497756 (1893-05-01), Woltmann et al.
patent: 500199 (1893-06-01), George, Jr.
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patent: 1345899 (1920-07-01), Stevens et al.
patent: 1512594 (1924-10-01), Grady
patent: 1909107 (1933-05-01), Kelly
patent: 2324459 (1943-07-01), Popp et al.
Hohauser Herman
The Scott & Fetzer Company
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