Other

Gm Global Technolgoy Operations, Inc.

Gerald K Sentman

John E Waters

A battery pack has a plurality of batteries connected in series to provide a high voltage energy source and energy storage. The battery pack has a high voltage receptacle in which a high voltage harness is connected when power is to be distributed or stored. a cover guard prevents inadvertent access to the harness connector. The cover guard has integral therewith an electrical disconnect mechanism and latch mechanism which must be manipulated prior to exposing the harness connector. The disconnect mechanism eliminates the electrical connection of the batteries to a receptacle in which the harness connector is installed. The latch mechanism prevents removal of the cover guard prior to manual disconnection and also prevents reconnection prior to the cover guard being properly positioned.

High voltage guard with interlock

Thread pitch cylinder gage

A thread pitch cylinder gage for an internally threaded bore in a workpiece, according to one embodiment, includes a gage post having a bearing surface extending through an externally threaded sleeve. The sleeve is trapped on the bearing surface by a retaining cap at the end of the gage post. A finger on the bearing surface engages a notch in the sleeve to prevent rotation of the sleeve relative to the bearing surface, while permitting relative axial motion. The sleeve includes two collections of retaining cavities with balls trapped therein, one at each end of the sleeve. The cavities, and therefore the balls, are centered between the flanks of a thread on the sleeve, and the balls are radially slidable between a retracted and a locked position. The bearing surface includes a plurality of sloped cam surfaces radially aligned with the balls in the sleeve. The cam surfaces are adapted to urge the balls radially outward when the gage post is pulled axially relative to the sleeve, until the balls contact, and are locked against, the threads in the workpiece bore. The two collections of balls, when in the locked position, establish the pitch cylinder and pitch axis of the threaded bore.

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Indianapolis, IN, United States of America

Gerald K Sentman