Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Washer structure – Axially resilient
Patent
1988-12-12
1990-03-20
Gehman, Bryon P.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Washer structure
Axially resilient
174 57, 206338, 206342, 206806, 206820, 220 37, 411535, 411546, F16B 4300, B65D 8516
Patent
active
049096923
ABSTRACT:
When an electrical device such as a receptacle switch or the like is fixedly wired into building wiring, it is electrically and mechanically connected to an outlet box inside the wall. The device is fastened to the face of the box by screws. Ordinarily, the opening in the wall for recessing the device has minimal clearance to admit only the device and the device has extending projections that engage the wall surface around the opening so that the device mounts flush with the wall surface. When the opening is oversize, the projections pass through the opening and the workman cannot secure the receptacle firmly and mount it flush with the wall. The invention provides a set of insulated horizontal spacer members mounted parallel to one another and flexibly joined together by flimsy vertical joining elements that are readily broken apart. The workman can break off a portion of the assembly that will provide the necessary total spacing thickness and place it between the projections and the junction box. The horizontal members have an axial hole for receiving the screw that fastens the device to the box. The members are molded of a suitable insulating plastic with enough resilience so that the joining elements holding individual members apart collapse when the screw is tightened.
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ECY Clip Sample Provided by Applicant as Prior Art (no date).
Blum Alvin S.
Gehman Bryon P.
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