Geometrical instruments
Patent
1981-07-27
1984-03-27
McGlynn, Joseph H.
Geometrical instruments
339 81, H01R 1352
Patent
active
044389957
ABSTRACT:
A housing with frangible locking elements includes at least one body portion having a cavity for containing an electrical, hydraulic or pneumatic fittig therein. The housing is provided with at least one tongue-like element engageable, in locking fashion, with at least one seating area provided by another housing, a plate or a supporting structure. Once the hook-like end of the tongue is engaged on the seating area, the housing may only be removed from service by destruction of the frangible tongue-like element, indicating visually that unauthorized tampering has taken place. One embodiment of the invention includes housings having living hinges, lockable to form the fitting containing cavity, by utilizing another hook-like shaped tongue element, engageable on a seating area on an opposed marginal edge of the housing. Another embodiment includes the ability to dispose the housing, in selected spaced-apart distance relationship from a mating housing, plate or supporting structure.
REFERENCES:
patent: 2462756 (1949-02-01), Leopold
patent: 2464893 (1949-03-01), Ross
patent: 2814787 (1957-11-01), Jessup
patent: 3013105 (1961-12-01), Craig
patent: 3112148 (1963-11-01), Wochner
patent: 3344393 (1967-09-01), Hender
patent: 3543218 (1970-11-01), Archer
patent: 3560632 (1971-02-01), Wallace
patent: 3740694 (1973-06-01), Fischer
patent: 4219693 (1980-08-01), French
Cristell Frank A.
Fisher Richard W.
Cristell Frank A.
McGlynn Joseph H.
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