Machine element or mechanism – Mechanical movements – Oscillation or reciprocation to intermittent unidirectional...
Patent
1978-07-28
1980-06-10
Reynolds, Wm. Carter
Machine element or mechanism
Mechanical movements
Oscillation or reciprocation to intermittent unidirectional...
74152, 74160, G01L 528, E21B 4900
Patent
active
042066581
ABSTRACT:
Rotary ratchet mechanism includes a ratchet wheel rotating about a first axis. A dog at one end of a lever engages a tooth of a wheel to rotate it in one direction. The lever is pivoted to a member at a point spaced from its end, the member being movable from first to second positions along a second axis spaced from the first axis and normal to a plane including the same to move the dog in the opposite direction from a first position engaging one tooth to a second position engaging another tooth. The pivot is spaced from the second axis on its side remote from the first axis and in the first position of the member is spaced from the other side of the plane. An anti-reversing dog is provided at one end of a second layer pivoted to a support at a second point spaced from its end, the second pivot being spaced from the other side of the plane and from the second axis on its side toward the first axis. Spring means acts on both levers to bias the first lever to urge the dog into engagement with a tooth, to bias the second lever in a direction to urge the anti-reverse dog into engagement with a driving portion of a tooth, and to return the member to its first position thereby to return the first lever and dog to the first position to rotate the wheel in one direction.
REFERENCES:
patent: 2576131 (1951-11-01), Lyon
patent: 2618982 (1952-11-01), Mead
patent: 3101013 (1963-08-01), Ayers et al.
patent: 3255857 (1966-06-01), Armstrong et al.
patent: 3501968 (1970-03-01), Fredell
Bowmar Instrument Corporation
Reynolds Wm. Carter
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