Motion detection device

Details Motion detection device Motion detection device

1977-05-19

1978-11-07

Swann III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340566, 200 6145R, 200 6152, G08B 1302

Patent

active

041248414

ABSTRACT:
A device for giving a visual or audible indication of motion such as impact, vibration or the like, which has a contact element supported on a base. When motion occurs, due to earthquake or other causes, a contact element is displaced completing an electrical circuit. In a preferred embodiment, the contact element comprises an elongate pin which topples in response to motion. In another embodiment the contact element may be a spherical element. The device may also be used as an intrusion alarm having an auxiliary member co-operable with the device so that the device can be attached to a door or a window as a trip alarm.

REFERENCES:
patent: 2926223 (1960-02-01), Netterfield
patent: 3092822 (1963-06-01), Dorman
patent: 3706867 (1972-12-01), Rand et al.
patent: 4039789 (1977-08-01), Hase

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