Earthquake detection system with pendulum switch

Details Earthquake detection system with pendulum switch Earthquake detection system with pendulum switch

1979-06-12

1982-11-16

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

307117, G08B 2100

Patent

active

043597220

ABSTRACT:
An instrument for warning an unaware person at a start of an earthquake; the instrument including a suspended pendulum which at its lower end has an electric contact spaced from a stationary ring-shaped contact which surrounds the pendulum contact, so that during an earth tremor the stationary contact moves together with the earth, thus engaging the suspended contact and accordingly closing an electric circuit with an audible alarm.

REFERENCES:
patent: 893997 (1908-07-01), Haas et al.
patent: 2448597 (1948-09-01), Jolley et al.
patent: 3962693 (1976-06-01), Schamblin
patent: 4214238 (1980-07-01), Adams et al.

Affiliated with

Also associated with

Rating

Earthquake detection system with pendulum switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Earthquake detection system with pendulum switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earthquake detection system with pendulum switch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1438024