Door activity monitoring apparatus

Details Door activity monitoring apparatus Door activity monitoring apparatus

1989-04-10

1990-12-11

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Gravity type

116204, G08B 1308

Patent

active

049762150

ABSTRACT:
A door activity monitoring apparatus (10) including a pivoted signal unit (11) that is mounted on a door jamb (100) and has a magnetically attractive indicator member (14) which cooperates with a magnetic keeper unit (12) that is secured to the door (103) to provide a visual signal indicative that the door (103) has been moved relative to the door jamb (100).

REFERENCES:
patent: 823782 (1906-06-01), Holden
patent: 2681762 (1954-06-01), Long et al.
patent: 2780198 (1957-02-01), Low
patent: 3080107 (1963-03-01), Lindahl
patent: 4756472 (1988-07-01), Hammons

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