Device for sensing sudden stop of machine

Details Device for sensing sudden stop of machine Device for sensing sudden stop of machine

1997-10-07

1999-11-09

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 2502311, 340467, G01D 534, G01B 1100, B60Q 144

Patent

active

059819391

ABSTRACT:
A device for sensing a sudden stop of a machine is disclosed. A spring-biased weight wheel is selectively moved in response to a predetermined extent of inertia force. A beam shutter is connected to the weight wheel and is selectively inserted into an optical sensor, thus intercepting a light beam of the sensor and allowing the sensor to generate a sudden stop signal. The spring force for the weight wheel is adjustable by controlling the position of a movable support plate and so the sensitivity of the device is controllable. The device is only started in response to the predetermined extent of inertial force, thus being almost completely prevented from being unexpectedly started by normal operational vibrations or rotating motions of the machine.

REFERENCES:
patent: 3760353 (1973-09-01), Hassinger
patent: 5115186 (1992-05-01), Reinartz et al.
patent: 5404130 (1995-04-01), Lee et al.
patent: 5434554 (1995-07-01), Caesar
patent: 5442333 (1995-08-01), Bailey
patent: 5669147 (1997-09-01), Nakajima et al.
patent: 5677670 (1997-10-01), Gangloff
patent: 5796097 (1998-08-01), Lawrence

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