Apparatus for detecting variation of a condition amount in a mec

Details Apparatus for detecting variation of a condition amount in a mec Apparatus for detecting variation of a condition amount in a mec

1976-08-10

1978-09-26

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

200 614, 200 52R, 340624, 340679, B60C 2300, B60T 1722, G08B 2300

Patent

active

041174518

ABSTRACT:
An apparatus for detecting variation of a condition in a mechanical device comprises a detecting transformer or plurality of such transformers provided with an input winding, a control winding and an output winding, an A. C. power source connected to said input winding, and a detecting element connected in series with said control winding. The normally closed detecting element is adapted to become open circuited in response to variation of the condition amount in said mechanical device. A required output signal is taken out and detected by an output circuit from the output winding due to the open circuiting of the detecting element.

REFERENCES:
patent: 2719288 (1955-09-01), Young
patent: 3143729 (1964-08-01), Power
patent: 3183498 (1965-05-01), Midis et al.
patent: 3374470 (1968-03-01), Massoubre
patent: 3556258 (1971-01-01), Winge et al.
patent: 3602884 (1971-08-01), Brumbelow
patent: 3603926 (1971-09-01), Kimura
patent: 3646293 (1972-02-01), Howard
patent: 3674114 (1972-07-01), Howard
patent: 3694803 (1972-09-01), Strenglein
patent: 3858174 (1974-12-01), Harris
patent: 3995262 (1976-11-01), France et al.

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