Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Hook head
Patent
1993-05-17
1994-12-06
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Hook head
411923, 2483167, F16B 1502, A47G 110
Patent
active
053704878
ABSTRACT:
The present invention is a thumb tack for holding photographs, posters and other similar items firmly in place on a supporting surface without poking any holes in the item being hung. The tack consists of a conventional sharp pin projecting outwardly from the underside of a bottom plate on the tack head. The tack head consists of the bottom plate connected to the top head by an edge razor thereof so that a slit is defined between the bottom plate and the top of the tack head. The top portion of the head has a peripheral arcuate clamping edge extending around the razor portion of the periphery of the top portion of the tack head. This razor portion of the periphery of the top portion of the tack head creates a clamp-like slit between the bottom plate and the top portion of the tack head. This slit is dimensioned for receiving edges of photographs, posters or other similar items which can then be inserted into the slit and held firmly in place without the necessity of poking a hole in the item being hung. With the photograph, or similar item, inserted into the slit, the pin can be pressed into a wall or supporting surface to hold the photograph, or similar item to the supporting surface.
REFERENCES:
patent: 279274 (1883-06-01), Patterson
patent: 1970335 (1934-08-01), Place
patent: 2283766 (1942-05-01), Sbicca
patent: 3386328 (1968-06-01), Litfin
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