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US 4,164,635 AGranted
Wall switch timer
AssigneeTime Systems, Inc.
InventorsDavid A. Finch, Charles M. Smillie, III
Life of this patent
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AssigneeTime Systems, Inc.
InventorsDavid A. Finch, Charles M. Smillie, III
Estimating the term…
The timer is adapted to be attached to a toggle light switch and comprises a body having a trip slide mounted in the body, with the slide having means for receiving and engaging the switch handle for tripping same to operate the lights. Spring means is provided in the body engageable with the slide for urging the slide to turn the lights off. When the slide is moved to compress the spring the lights are turned on. With the lights on, a latch carried by the slide engages the body to maintain the slide latched with the spring compressed. Fluid responsive timing means, located within the body, is engageable with the latch to operate and release the latch from engagement with the body after expiration of a predetermined time interval. Thereafter the compressed spring means moves the slide in a direction to trip the switch handle, thus turning the lights off.
A timing device intended for operating an electrical toggle type wall switch having an operating arm projecting outwardly from a standard type electrical switch plate, said timing device comprising a body having a front wall provided with a first opening, a back wall provided with a second opening, and a peripheral wall connecting said front and back walls, internal wall means located in the interior of said body and defining a cavity, said timing device being adapted to overlie the switch plate, with said back wall in engagement with the switch plate and the outwardly projecting arm of the toggle switch extending into said cavity through said second opening provided in said back wall, a trip slide mounted in said cavity and movable in opposite directions between first and second limiting positions, said trip slide having means for receiving and engaging the outwardly projecting arm of the toggle switch for operating and tripping same as a result of the movement of said trip slide, spring means in said cavity engageable with said trip slide for urging same towards said first limiting position, said spring means being compressed by said trip slide when the latter is moved to said second limiting position, said trip slide including an arm portion projecting outwardly from said body through said first opening provided in said front wall and through which a force may be applied to the trip slide to move same relative to said spring means to one or the other of the limiting positions, a latch carried by said trip slide and engageable with said internal wall means to maintain the trip slide in said second limiting position with said spring means compressed, and fluid responsive timing means located within the interior of said body and engageable with said latch to operate and release said latch from engagement with said internal wall means after the expiration of a predetermined time interval thereby permitting said compressed spring means to move said trip slide to said first limiting position thus tripping the operating arm of said toggle switch.
A timing device comprising a hollow body, internal wall means located in the interior of said body, a trip slide mounted in said body and movable in opposite directions along an axis between first and second positions, said trip slide having means adapted for receiving and engaging an operating arm for tripping same as a result of the movement of said trip slide, spring means in said body engageable with said trip slide for urging same towards said first position, said spring means being compressed by said trip slide when the latter is moved to said second position, a latch carried by said trip slide and engageable with said internal wall means to maintain the trip slide in said second position with said spring means compressed, and fluid responsive timing means located within the interior of said body and engageable with said latch to operate and release said latch from engagement with said internal wall means after the expiration of a predetermined time interval thereby permitting said compressed spring means to move said trip slide to said first position thus tripping the operating arm.
A timing device comprising a hollow body having a front wall provided with a first opening, a back wall provided with a second opening, and a peripheral wall connecting said front and back walls, internal wall means located in the interior of said body, a trip slide mounted in said body and movable in opposite directions along an axis between first and second positions, said trip slide having means adapted for receiving and engaging an operating arm for tripping same as a result of the movement of said trip slide, spring means in said body engageable with said trip slide for urging same towards said first position, said spring means being compressed by said trip slide when the latter is moved to said second position, means mounting said trip slide in said body for rotation from said second position to a third position and in a direction perpendicular to said axis, with said spring means remaining compressed whereby upon rotation a part of said trip slide extends into said first opening and engages said front wall to lock same in said third position, said trip slide including an arm portion projecting outwardly from said body through said first opening provided in said front wall and through which a force may be applied to the trip slide to move same relative to said spring means to one or the other of said positions, a latch carried by said trip slide and engageable with said internal wall means to maintain the trip slide in said second position with said spring means compressed, and fluid responsive timing means located within the interior of said body and engageable with said latch to operate and release said latch from engagement with said internal wall means after the expiration of a predetermined time interval thereby permitting said compressed spring means to move said trip slide to said first position thus tripping the operating arm.
Dependencies are inferred from the claim text.