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Browse Prior Art Database

Precision Low Profile Disconnect Device

IP.com Disclosure Number: IPCOM000120398D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 3 page(s) / 148K

Publishing Venue

IBM

Related People

Vanek, A: AUTHOR

Abstract

The mechanical device disclosed herein permits the rapid removal of a component from its mounting surface. It was intended for those applications where the component may require frequent service or an interchange of size. Significantly, its greatest value is for those components that require a precise mechanical location and substantial rigidity, such as electrical test heads, coating masks, optical sensors, reticles, TV camera, locating devices, etc.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 46% of the total text.

Precision Low Profile Disconnect Device

      The mechanical device disclosed herein permits the rapid
removal of a component from its mounting surface.  It was intended
for those applications where the component may require frequent
service or an interchange of size. Significantly, its greatest value
is for those components that require a precise mechanical location
and substantial rigidity, such as electrical test heads, coating
masks, optical sensors, reticles, TV camera, locating devices, etc.

      Since this Quick-Disconnect does not require the use of loose
fastener hardware, screw drivers, or wrenches to effect connection of
a component, it has the potential for reducing machine "downtime".
On manufacturing machinery, for example, a test head installed with
locating dowel pins and several screw fasteners may require a half
hour for installation and removal.  The Quick-Disconnect can reduce
this time to 15 seconds while maintaining precise three-axis location
to within 5 micrometers.  Fabricated of hardened steel member (56 to
58 on the Rockwell "C" scale), the relatively large surface areas at
point of engagement insure repeatability of precision, superior load
handling capability and long life.

      The "low-profile" feature refers to the thickness of the
assembled device which, in the area of the Male Disconnect Plate, is
just sufficient to bury the head of retaining screws chosen for its
fastening.  On a typical unit, where the Female Disconnect Plate
measures approximately 102 x 230 mm, a thickness of 6 mm is adequate
for the lower half (the area engaged by Male Disconnect Plate) and
approximately 12 mm in the region of the Toggle Mechanism.  This low
profile is an asset both for its low space requirements and its
ability to maintain a short over-hand for loads imposed on the
components to be mounted.

      Referring to the figure, the Disconnect consists of a Male
Disconnect Plate (attached to component to be engaged), a Female
Disconnect Plate (for attachment to surface from which component is
transferred), and a Toggle mechanism providing the lock/release
feature.  Engaging a component is accomplished by inserting the Male
Disconnect Plate into the opening of the Female Disconnect member and
moving it downward until it seats on the tapered "dove-tail" edges.
Rotating the Toggle Arm counter-clockwise locks the component in
place.  Reversing the order of operations removes the component.

      The Toggle Mechanism was designed to perform several functions:
   1.   180-degree rotation of the Toggle Arm moves the locking
tongue/pad up for component removal, or down to effect clamping.
      2.   It provides the mechanical advantage required to compress
the disc springs which place a pre-determined load on the seated Male
Disconnect Plate.
      3.   Deliberate over-travel applied to the Toggle Link moves
its upper pivot a few degrees beyond vertical dead-center such that
the compre...