Closure fasteners – Operators with knobs or handles
Patent
1977-03-28
1978-07-11
Moore, Richard E.
Closure fasteners
Operators with knobs or handles
292126, E05C 330
Patent
active
040997570
ABSTRACT:
The invention concerns a child-proof door catch device which requires a sequence of unconnected manipulations to operate the mechanism opening a door. The mechanism includes a housing and operating and latching elements, the operating and latching elements being normally held apart by a biasing means. When the correct sequence of manipulations is performed on the operating element, the latching element is caused to disengage from a striker plate to allow the door to be opened.
REFERENCES:
patent: 1169659 (1916-01-01), Lowell
patent: 2670981 (1954-03-01), Wenham
patent: 2731821 (1956-01-01), Lloyd
patent: 3918751 (1975-11-01), Blake
Clinch Colin W.F.
Harley David N.
Palmer John P.
Beart Robert W.
Halvorsen Jack R.
ITW Limited
Moore Richard E.
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