Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1992-08-10
1994-04-12
Watson, Robert C.
Work holders
Relatively movable jaws
Means to actuate jaw
B23Q 104
Patent
active
053019342
ABSTRACT:
A twin screw vise utilizing two threaded vise screw rods that are journaled through flanged nuts fixed to a workbench top or to a rear, fixed bench jaw. The vise screws pass through a movable front jaw and into tee-castings and handles that may be turned to rotate the screws. Sprockets are located on each screw between the tee castings and the front jaw and are coupled by a chain. One of the sprockets is fixed in position on its screw during a calibration procedure. The other sprocket remains free to rotate on its screw, except when a spring loaded pin in the corresponding tee-casting engages a depression in the face of the sprocket, thereby coupling that sprocket to the tee casting and associated screw.
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Landis, Scott, The Workbench Book, p. 133 (1987) The Taunton Press Inc.
Frank Timothy C.
Lacoste Gary W.
Lee Leonard G.
Lynn John S.
McLean Francis A.
Lee Valley Tools Ltd.
Watson Robert C.
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