Pumps – Condition responsive control of pump drive motor – Responsive to pump or pump fluid temperature
Patent
1989-10-05
1991-03-19
Smith, Leonard E.
Pumps
Condition responsive control of pump drive motor
Responsive to pump or pump fluid temperature
417 45, 4174231, 4174237, 338308, F04D 2700
Patent
active
050006622
ABSTRACT:
A flat resistance for a blower control unit of an automobile air conditioner, and a blower control unit using the same. The flat resistance includes: a porcelain enameled metallic substrate including a flat head portion, having an edge and one surface, and parallel terminal supporting portions projecting outwardly from the edge of the head; a resistance circuit printed on the one surface of the head portion, the resistance circuit including a plurality of resistances electrically connected in series; a temperature fuse, interposed in the resistance circuit, for being tripped to break the resistance circuit when the porcelain enameled metallic substrate becomes overheated; and terminals, printed on both the head portion and the terminal supporting portions, each terminal being connected to one end of a corresponding one of the resistances.
REFERENCES:
patent: 3473146 (1969-10-01), Mulligan
patent: 3928837 (1975-12-01), Esper et al.
patent: 4342020 (1982-07-01), Vtner et al.
Hirabayashi Hisanaga
Itoh Masanori
Okuyama Hitoshi
Suzuki Takao
Uruga Ken-ichi
Calsonic Corporation
Fujikura Ltd.
Kohwa Manufacturing Co., Ltd.
Scheuermann David W.
Smith Leonard E.
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