Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1985-07-03
1986-10-07
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
318 15, 338184, 338199, 74DIG10, G05B 106, H02K 710
Patent
active
046161643
ABSTRACT:
A feedback potentiometer type servoactuator having a plastic housing shell with small high RPM low voltage motor and non-metallic gear reduction train for driving an output shaft. The shell and cover plate provide structural support for gear journalling and the cover plate has an electrically resistive plastic strip baked onto the inside of the cover. Contacts mounted on the output gear for movement therewith wipe the resistive strip to provide variable resistance for an output shaft position feedback signal. The motor pinion and first stage reduction gears are made of urethane thermoplastic elastomer, the second stage gears of acetal plastic and the final gears are formed of 30% glass fiber filled polyester plastic for providing quiet running and long gear life.
REFERENCES:
patent: 4105987 (1978-08-01), Spence
patent: 4311946 (1982-01-01), Pathmann
patent: 4433964 (1984-02-01), Holtzberg
patent: 4463831 (1984-08-01), Wakase
Wheeler, William, "Precision Position Sensors in Automatic Applications", 0148-7191/78/0277-0209, 1978 Soc. of Auto. Engr., Inc., (10 pp.).
DeVera Dennis
Kenny Andrew A.
Stahly Daniel C.
Eaton Corporation
Grace C. H.
Johnston R. A.
Keane Patrick C.
Shoop Jr. William M.
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