Switch lever operating device with automatic timer

Details Switch lever operating device with automatic timer Switch lever operating device with automatic timer

1992-07-10

1994-04-26

Scott, J. R.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

200 33R, H01H 4300

Patent

active

053069579

ABSTRACT:
For operating a switch which has a switch lever, such as a toggle switch lever, The invention provides a device which fits over the switch with the switch lever engaged by a slide on the device. Manual operation of the slide moves the switch lever from OFF to ON. The same operation of the slide starts a timer and sets a return mechanism which is retained at its set position by a latch until the timer at the end of a preset time interval actuates a release mechanism which retracts the latch. The return mechanism then returns the slide to turn the switch lever OFF. All of the operating parts, including a self-contained power source are within a housing that fits over the switch. In preferred embodiments the timer is a microcomputer chip. An optional time interval selector is described for presetting a selected time interval for the timer. A single manual movement of the slide causes the device to automatically execute the rest of its cycle.

REFERENCES:
patent: 2937247 (1960-05-01), Laviana et al.
patent: 3179758 (1965-04-01), Trock
patent: 3818156 (1974-06-01), Augustyniak
patent: 3985982 (1976-10-01), Schneidinger
patent: 4019166 (1977-04-01), Lawrence et al.
patent: 4164635 (1979-08-01), Finch et al.
patent: 4521722 (1985-04-01), Barthel et al.
patent: 4972045 (1990-11-01), Primeau

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