Shaft speed and hot bearing indicating apparatus

Details Shaft speed and hot bearing indicating apparatus Shaft speed and hot bearing indicating apparatus

1977-02-10

1979-09-11

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

308 1A, 324168, 340590, G01D 2100, G08B 1900

Patent

active

041677340

ABSTRACT:
A shaft speed and hot bearing indicating apparatus is described having a transducer actuating means mounted on the shaft immediately adjacent the supporting bearing for actuating an electrical transducer to produce an electrical pulse as the transducer actuating means is rotated during each revolution of the shaft. The transducer pulse is processed by an electronic mechanism for multiplying the transducer pulse by sixty by a phase-locked loop network and then counting the number of multiplied pulses occurring during each one second of time interval in a BCD counting mechanism. The total count is displayed each second on a decimal digital display. The apparatus also has means for activating an alarm when the sensed speed falls below a preset speed. The transducer activating means is responsive to the temperature of the bearing and is rendered ineffective when a preset temperature is reached.

REFERENCES:
patent: 2963691 (1960-12-01), Yerger
patent: 2976523 (1961-03-01), Duffy
patent: 3264560 (1966-08-01), Cheney
patent: 3559205 (1971-01-01), Colby
patent: 3611343 (1971-10-01), Schoenbach
patent: 3678474 (1972-07-01), Brown
patent: 3853087 (1974-12-01), Aldag
patent: 3916361 (1975-10-01), Hasegawa et al.

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