Electricity: conductors and insulators – Boxes and housings – With grounding means
Patent
1981-10-13
1983-07-05
Grimley, A. T.
Electricity: conductors and insulators
Boxes and housings
With grounding means
339 14R, H02G 308
Patent
active
043920128
ABSTRACT:
Electrical wiring box arrangments comprise a wiring box with a wall structure having a channel for slideably receiving a gripping member for engaging the mounting screw of a wiring device mounted in the box. The gripping member comprises a body having two opposed elements which engage and grip the threads of the mounting screw. Inwardly tapering wall portions of the box wall channel urge the two gripping member elements toward one another as the mounting screw is tightened, insuring a firm grip between the mounting screw and the gripping member.
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Promotional literature, "Self Clamp & Thread" by Highland Mfg. Company Ltd., Burnaby, B. C., Canada.
Grimley A. T.
GTE Sylvania Canada Limited
Janssen Jerry F.
Keay David M.
Tone D. A.
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