Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1975-12-29
1977-08-30
Scott, James R.
Electricity: circuit makers and breakers
Retarded
Clock train
200 38BA, 200153LB, 200332, 318466, H01H 4312, H01H 320, H02P 300
Patent
active
040456269
ABSTRACT:
An electric motor assembly for driving a helical feed screw for use in a vending machine. The helical feed screw is intermittently operated through cycles of similar duration and must be accurately positioned at the end of each cycle. Operation of the motor is initiated by the insertion of coins and is continued for the remainder of a cycle by a holding circuit. An actuating member for the holding circuit switch is positioned adjacent a cam which rotates with the helical feed screw. A pawl is positioned between and engages the switch actuating member and the cam. The cam has a notch indicating the end of the cycle which notch receives the pawl thereby allowing the switch actuating member to open the holding circuit and stop the motor. The pawl also has a dog which engages the edge of the cam notch to prevent reverse rotation of the cam at the end of the cycle. The pawl transmits cam forces to the switch actuating member only along the longitudinal axis thereof. The pawl and switch enclosure are mounted on a commmon mounting pin. The spring biasing the pawl and the switch enclosure are secured to the gear train housing by a common fastener.
REFERENCES:
patent: 1831605 (1931-11-01), Porter
patent: 2571818 (1951-10-01), Blodgett
patent: 2799847 (1957-07-01), Harris
patent: 2847525 (1958-08-01), Everard
patent: 3190976 (1965-06-01), Ellis et al.
patent: 3248956 (1966-05-01), Kuhn
patent: 3424876 (1969-01-01), Wiser et al.
patent: 3670128 (1972-06-01), Estrem
patent: 3712966 (1973-01-01), Watts et al.
patent: 3846597 (1974-11-01), Ziegler, Jr.
patent: 3980937 (1976-09-01), Bostrom et al.
Original Equipment Motors
Scott James R.
LandOfFree
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