Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1975-01-27
1976-08-31
Scott, Samuel
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
F16H 2116
Patent
active
039772586
ABSTRACT:
An automatically reversing traverse mechanism cooperable with a rotating shaft, comprising a base, a roller mounted on the base for simultaneous turning and swiveling movement, and engageable with the shaft, and a unique yieldable biasing means which urges the roller by means of a snap movement to either of two oppositely disposed, extreme angular positions. As the shaft is rotated, the angularly disposed roller and base automatically undergo reciprocative movements in a path parallel to the axis of the shaft. The traverse mechanism includes a novel operating means which substantially instantaneously swivels the roller from its one extreme position to its other extreme position in response to movement of the base past a predetermined point. The operating means includes a fixed abutment located at a predetermined point along the shaft, and an arm rotatably carried by the base, which engages the abutment and subsequently undergoes turning movement. This turning movement is made to effect a substantially instantaneous turning movement of a second arm on which the roller is carried, thus accomplishing the swiveling of the latter from one extreme position to another. Due to the snap action which swivels the roller, the rate of traversal axially along the shaft is very constant and does not suffer from a reduction in speed immediately before the reversal in direction of the base. An additional abutment is disposed opposite to and acts like the first, thereby to enable the mechanism to undergo reciprocating movement. Means are also provided for counting the number of traversals and for automatically shifting the two abutments after a predetermined count, thus enabling the length of the reciprocating stroke to be varied in accordance with a predetermined pattern.
REFERENCES:
patent: 2940322 (1960-06-01), Uhing
Lehmann H. Gibner
Lehmann K. Gibner
Ratliff, Jr. Wesley S.
Scott Samuel
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