Browse Prior Art Database

Automatic Dual Lock for Vertical Hinged Member

IP.com Disclosure Number: IPCOM000046076D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Thompson, GN: AUTHOR

Abstract

The drawing shows a pivoted member 10 mounted by a shoulder screw 12 and is of extended length outboard of the screw 12. This extra length and weight cause the left end 14 to contact the radius 16 of vertical hinged members 18 mounting tab 20. As the hinged member 18 is raised upward, a flat portion of its mounting tab 22 is exposed to the pivoted lock member which rotates clockwise by gravity. This serves as both an upstop and a downstop, as the hinged member 18 is locked in this position. To lower (or to raise higher) the hinged member 18, the lock 10 is rotated in a counterclockwise direction by hand.

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Automatic Dual Lock for Vertical Hinged Member

The drawing shows a pivoted member 10 mounted by a shoulder screw 12 and is of extended length outboard of the screw 12. This extra length and weight cause the left end 14 to contact the radius 16 of vertical hinged members 18 mounting tab 20. As the hinged member 18 is raised upward, a flat portion of its mounting tab 22 is exposed to the pivoted lock member which rotates clockwise by gravity. This serves as both an upstop and a downstop, as the hinged member 18 is locked in this position. To lower (or to raise higher) the hinged member 18, the lock 10 is rotated in a counterclockwise direction by hand.

A second predetermined non-locking upstop position is also available. To reach this position, the lock is rotated counterclockwisepermitting the vertical hinged member to be raised higher, whereas the tab member 22 drivingly engages and rotates the lock 10 in a further counterclockwise direction, causing the top side of the lock to abut the tab 22. Lowering of the hinged member permits the lock to rotate in a clockwise direction and will stop the hinged member in the first locked position. As an alternative, the lock may be held by hand at the second up position to prevent its clockwise gravitational rotation, permitting the hinged member to bypass the first lock position and move directly to the lower home position.

This device is particularly useful in testing fixtures requiring the holding of a cover.

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