Work holders – Work-stop abutment
Patent
1975-12-16
1977-07-05
Smith, Al Lawrence
Work holders
Work-stop abutment
269207, 269210, B23Q 700
Patent
active
040335712
ABSTRACT:
A positioning arrangement for an element, such as an abutment of an industrial cutting machine, which is mounted on an elongated rail for movement longitudinally thereof, includes a toothed portion rigid with and extending longitudinally of the elongated rail, and an arresting member having serrations which are adapted to matingly engage with the toothed portion in a plurality of positions. The arresting member is mounted on the element for displacement toward and away from the toothed portion, and also for limited movement relative to the element longitudinally of the elongated rail. The arresting member has two opposite lateral surfaces which diverge toward the toothed portion, and a pair of wedge members is provided, each of the wedge members having a wedge surface adapted to contact the lateral surface of the arresting member, the wedge members being mounted on the element for independent displacement toward and away from the toothed portion. A spring urges the arresting member toward engagement with the toothed portion, and a pair of flanges extends into the path of movement of the wedge members away from the toothed portion, the force of engagement of the wedge members with the flanges overcoming the urging force of the spring and thus disengaging the arresting member from the toothed portion. When the element is to be arrested in any of an infinite number of positions along the elongated rail, the wedge members first disengage from the flanges of the arresting member so that the spring displaces the arresting member into one of a plurality of discrete positions relative to the toothed portion, and then the wedge surfaces of the wedge members individually engage the lateral surfaces of the arresting member, thus connecting the element to the arresting member and arresting the former in the selected position.
REFERENCES:
patent: 1867922 (1932-07-01), Nelson
patent: 2989337 (1961-06-01), Pispisa
Peddinghaus Rolf
Smith Al Lawrence
Striker Michael J.
Watson Robert C.
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