Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1976-06-14
1978-09-12
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
Specific condition
200 82D, 303 6C, 340 52C, G08B 2100
Patent
active
041141458
ABSTRACT:
In a pressure differential warning actuator for detecting when a differential between the pressure of separate brake circuits of an hydraulic braking system exceeds a predetermined value, at least two separate pistons work in separate bore portions in a common housing and are movable between a neutral position when the predetermined value of the differential pressure is not exceeded and an operative position, in which an indicator mechanism is actuated, when the predetermined value is exceeded, and the pistons act through a lever ratio change mechanism to restore them from the operative position to the neutral position when the differential is reduced to less than the predetermined value.
REFERENCES:
patent: 2857584 (1958-10-01), Gibson
patent: 3825706 (1974-07-01), Papiau
Caldwell Sr. John W.
Girling Limited
Myer Daniel
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