Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-04-14
1988-09-13
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
49 67, 200 6169, 340547, G08B 1308, H01H 316
Patent
active
047712694
ABSTRACT:
The invention relates to a system for detecting the incomplete closure of the doors of a chamber with at least two doors (14, 16), one an inner door and the other an outer door, arranged one behind the other in front of an orifice of the said chamber and mounted pivotally between an open position and a closed position about two parallel pivot axes (18, 24) respectively.
The detection system comprises an active element (34) capable of causing an action in a particular direction and a sensor element (36) sensitive to the said action, the said elements being fastened one to the inner door (14) and the other to the outer door (16) at a point located opposite the other element, in such a way that the sensor element is in the line of action of the active element only when the two doors are closed correctly.
REFERENCES:
patent: 4227766 (1980-10-01), Finale
patent: 4241337 (1980-12-01), Prada
patent: 4278968 (1981-07-01), Arnett et al.
patent: 4292629 (1981-09-01), Kerr et al.
patent: 4302907 (1981-12-01), Canals et al.
patent: 4583082 (1986-04-01), Naylor
Pasty Alain
Vaillant Jacques
Jouan
Mullen Jr. Thomas J.
Swann III Glen R.
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