Refrigeration – With indicator or tester – Operatively correlated with automatic control
Patent
1981-01-09
1983-01-25
Wayner, William E.
Refrigeration
With indicator or tester
Operatively correlated with automatic control
62133, 340 52R, 200 814, F25B 4900, B60Q 100
Patent
active
043696341
ABSTRACT:
A presettable fuel-flow monitor and automatic air compressor cut-off for a motor vehicle alerts the driver to inefficient vehicle operation, and during such operation, cuts off the air conditioner. A Bourdon tube is operatively connected to engine vacuum and is adapted to move in response thereto. A switch contact, adapted to be activated on a given displacement of the Bourdon tube, is positioned a preset distance from the Bourdon tube. A secondary switch, in series circuit with the air conditioner switch, is normally closed and applies electrical power to the magnetic clutch for air conditioner operation. An alarm or signal, consisting of either a light, or audible means, or both, is connected to electrical power through the switch contact. When changes in engine vacuum cause the Bourdon tube to move a preset distance, the tube operates the secondary switch opening same thus cutting off the air compressor. Thereafter, the tube engages the switch contact to apply power to the alarm. The trip point for cutting off the air conditioner and turning on the alarm can be "fine-tuned" to suit a variety of engine vacuum efficiencies, vehicle weights, and individual driving habits.
REFERENCES:
patent: 3606764 (1971-09-01), Yokouchi et al.
patent: 4269033 (1981-05-01), Birch
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