Device for indicating the movement and/or position of a shutoff

Details Device for indicating the movement and/or position of a shutoff Device for indicating the movement and/or position of a shutoff

1986-09-15

1987-04-28

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340547, G08B 1308

Patent

active

046618058

ABSTRACT:
A tamper resistant device is disclosed for dependably indicating when a door or other shut off means has reached a closed position. The device includes a series of transmitting and receiving elements brought into juxtaposition during or at the final closing movements of the door. The device may include read out means responsive to the sequence of activation of the receiving elements and/or the identity of the receiving elements activated.

REFERENCES:
patent: 3771153 (1973-11-01), Byrne
patent: 3828340 (1974-08-01), Bauer, Jr. et al.
patent: 4074246 (1978-02-01), Conklin et al.
patent: 4170005 (1979-10-01), Duke
patent: 4379289 (1983-04-01), Peck
patent: 4583082 (1986-04-01), Naylor

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