Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1975-08-01
1977-05-17
Scott, Samuel
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74805, 74750R, 74 86, F16H 706
Patent
active
040234401
ABSTRACT:
A motion transmitting device comprising four basic elements, namely, eccentric means, meshing means in the form of a series of individually movable meshing elements, wheel means formed with portions complementary to the meshing elements, and movement-limiting means. The eccentric means is disposed to cause the meshing elements to sequentially wobble (or generally move) in-and-out of meshing engagement with the complementary portions, while the meshing elements are individually guided within specifc limits of wobbling motion (or, generally, motion) by the movement-limiting means.
In one embodiment, the wheel means is conveniently a toothed gear wheel, which meshes with a special form of transmission chain whose pins provide the meshing elements and which may conveniently extend to provide part of the movement-limiting means, the other part thereof comprising apertures in a datum member which define the limits of the movement of the pins.
Any two of the four basic elements can provide the input and the output of the device, and any desired ratio between input and output rotation speeds, in single or multiple-stage arrangements, can be obtained, by suitably choosing the numbers of meshing elements and complementary portions on the wheel means.
REFERENCES:
patent: 3307434 (1967-03-01), Kope
patent: 3472097 (1969-10-01), Huska
patent: 3726158 (1973-04-01), Brown
Dimitracopoulos Panayotis Constantine
Kennington Frank William
Keen D. W.
Precision Mechanical Developments Ltd.
Scott Samuel
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