Testing rotary movement-electrical signal transducer system, par

Details Testing rotary movement-electrical signal transducer system, par Testing rotary movement-electrical signal transducer system, par

Filed on

1976-10-18

Date issued

1978-06-06

Examiner

Ruehl, Charles A.

Patent Class

Measuring and testing

SubClass

Brake testing

Other Related Categories

303 92, 340 52B, B60T 1722

Type

Patent

Status

active

Patent number

040928535

Description

ABSTRACT:
The time duration of output pulses from the transducer, including wave-shaping circuits, if used, is measured and compared with respect to predetermined time limits. Two sequential pulses are measured and stored. If both pulses are shorter than a predetermined time interval, no alarm signal is generated; if the first pulse is longer than a predetermined time interval and the second also longer than a predetermined time interval, an alarm signal generation circuit, otherwise activated by the second, longer signal, is inhibited (since acceleration or deceleration of the wheel is indicated); if, however, the time duration of the second sequential pulse is longer than a predetermined time interval, but the time duration of the preceding pulse is shorter than its time duration threshold value, the malfunction signal is not inhibited, indicative of malfunction, loose contacts, or the like.

REFERENCES:
patent: 2985828 (1961-05-01), Mason
patent: 3500375 (1970-03-01), Klimo
patent: 3742299 (1973-06-01), Gane
patent: 3874743 (1975-04-01), Fleischer et al.
patent: 3920284 (1975-11-01), Lane et al.

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