Step switch

Details Step switch Step switch

1981-01-23

1982-11-23

Shepperd, John W.

Electricity: circuit makers and breakers

Special application

Liquid or moisture responsive

H01H 516

Patent

active

043607209

ABSTRACT:
A step switch having contacts actuatable in predetermined indexed positions comprises a rotatable driving shaft and a coaxial driven shaft rotating an indexing mechanism into the indexed positions for actuating the contacts. A coupling is arranged between the shafts for indexing the rotary movement of the driven shaft in response to the rotation of the driving shaft. The coupling includes a driving coupling part keyed to the driving shaft, a driven coupling part keyed to the driven shaft, the coupling parts having peripheries coaxial with the shafts, a spring having two ends respectively engaging the coupling parts and being tensioned in the direction of the coupling part peripheries, and a shape-conforming blocking device controlled by the rotary position of the shafts in relation to each other for respectively blocking and unblocking the rotary movement of the driven coupling part.

REFERENCES:
patent: 1643210 (1927-09-01), Guett
patent: 3283596 (1966-11-01), Roeser

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