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US 4,364,033 AGranted
Alarming seismometer
OwnerYun-Tyng Tsayinventor
Life of this patent
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Abstract
A small-sized, high sensitivity seismograph comprising a first seismometer for detecting left-right ground motions, a second seismometer for detecting up-down ground motions, two sets of protective device for preventing the seismographic detectors from damage due to excessive motions, an alarm system, and an adjustable device for adjusting the sensitivity of the alarm system. All of the above-described devices are provided in a case.
Claims9
An alarming seismometer apparatus comprising:
- (a) a case having a plurality of supporting members therein, one of said supporting members being provided with a cylinder;
- (b) a first seismometer for detecting left-right ground motions secured by certain ones of said supporting members, said first seismometer including a plurality of annular pendulums connected interlockingly;
- (c) a steel ball contained within said cylinder;
- (d) said cylinder being connected with at least one pendulum of said plurality of pendulums;
- (e) a universal joint means connected to a second of said supporting members and located above said steel ball;
- (f) a detecting needle actuated by motions of said pendulums, the upper end of said detecting needle being inserted through said steel ball into a recess in said universal joint whereby a higher magnification of the motions of said detecting needle may be obtained if said pendulums are moved in an earthquake;
- (g) an electromagnetic means for producing a voltage by the motion of said detecting needle;
- (h) rectifying circuit connected with said electromagnetic means whereby motions of said detecting needle can be magnified interlockingly by said pendulums, in even a very brief earthquake;
- (i) a second seismometer, for detecting up and down ground motions, secured by a third of said support members;
- (j) an alarm system connected with said rectifying circuit;
- and
- (k) a means for adjusting the sensitivity of said alarm system.
9 more elements
Dependencies are inferred from the claim text.