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Pin Vise

IP.com Disclosure Number: IPCOM000073393D
Original Publication Date: 1970-Dec-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Koppenhoefer, PC: AUTHOR [+2]

Abstract

In testing modules, such as the module 10 shown, it is desirable to test the tensile strength of the pins 11 associated with the module and to allow easy grasping of the pins without the application of excessive torque. The pin vise comprises a barrel or tube 12 having threads 13 at one end cooperating with internal threads in an internally tapered collar 14. The internal tapered section operates as a cam against a split chuck 15 which is movable axially of the barrel 12. Thus, rotation of the collar effects a clamping action upon a pin 11 held by the chuck. If the module is being held by a vise or the like, excessive rotation of the collar creates a torque upon the pin being held by the chuck which tends to twist the pin off the module.

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Pin Vise

In testing modules, such as the module 10 shown, it is desirable to test the tensile strength of the pins 11 associated with the module and to allow easy grasping of the pins without the application of excessive torque. The pin vise comprises a barrel or tube 12 having threads 13 at one end cooperating with internal threads in an internally tapered collar 14. The internal tapered section operates as a cam against a split chuck 15 which is movable axially of the barrel
12. Thus, rotation of the collar effects a clamping action upon a pin 11 held by the chuck. If the module is being held by a vise or the like, excessive rotation of the collar creates a torque upon the pin being held by the chuck which tends to twist the pin off the module. To prevent this action, a jaw actuating mechanism is provided for cooperation with a terminal end 16 on the chuck 15 effecting radial displacement of the chuck against the pin. To this end, a pair of steel balls 17 are deposited on the terminal end 16 of the chuck and bear against a frusto-conical camming portion 18 associated with a set screw 19 which passes into and through the barrel 12 of the vise. Screwing the threads of the set screw inwardly cams the balls 17 downward increasing the radial jaw pressure against the pin being held. The set screw could be positioned at the terminal axial end and operate directly upon the terminal end of the chuck 15.

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