Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1976-01-09
1977-11-29
Scott, James R.
Electricity: circuit makers and breakers
Retarded
Clock train
200 38R, 200 38C, H01H 710, H01H 4300
Patent
active
040607020
ABSTRACT:
An escapement mechanism for an appliance timer includes a cylindrically shaped driving member which is concentric with the axis of the appliance timer program wheel. One or more cam lobes providing camming surfaces are formed on an interior cylindrical wall of the driving member. A ratchet wheel is disposed for rotation within the driving member. The ratchet wheel is drivingly connected to the program wheel. A pawl having a ratchet wheel engaging tooth at one end and a cam follower at the other end is actuated by the camming surfaces on the driving member to cause the pawl to move a predetermined distance in a first direction, engage the ratchet wheel, and then return the same distance in the opposite direction to advance the ratchet wheel and the program wheel in response to rotation of the driving member.
REFERENCES:
patent: 3028458 (1962-04-01), Strathearn et al.
patent: 3053947 (1962-09-01), Bowman et al.
patent: 3172966 (1965-03-01), Holzer
patent: 3292017 (1966-12-01), Bauer
patent: 3704351 (1972-11-01), Linn et al.
patent: 3725618 (1973-04-01), Voland et al.
patent: 3727015 (1973-04-01), Voland et al.
patent: 3752944 (1973-08-01), Cartier et al.
patent: 3789701 (1974-02-01), Ditzig
patent: 3809831 (1974-05-01), Godwin et al.
patent: 3819886 (1974-06-01), Homan et al.
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