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Clutch Assembly for Small Mechanical Devices

IP.com Disclosure Number: IPCOM000113650D
Original Publication Date: 1994-Sep-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Dunaj, M: AUTHOR

Abstract

Described is a hardware implementation of a clutch assembly for small mechanical devices, such as used in miniature cameras or similar devices. The clutch assembly is designed to be used in device mechanisms which require a clutch that does not damage the device mechanism when an end of an operational stroke is reached.

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Clutch Assembly for Small Mechanical Devices

      Described is a hardware implementation of a clutch assembly for
small mechanical devices, such as used in miniature cameras or
similar devices.  The clutch assembly is designed to be used in
device mechanisms which require a clutch that does not damage the
device mechanism when an end of an operational stroke is reached.

      The Figure shows a cutaway view of the clutch assembly.  Three
steel balls 10 are positioned at 120º  locations in housing 11 so
as to lock into mating spherical pockets on shaft 12.  As the preset
spring 13 load is exceeded by applying a torque to housing 11, balls
10 retract so as to allow housing 10 to slip about shaft 12.
Retainer 14 is used to protect and house the inner workings of the
clutch.

      The pre-load on spring 13 is designed to limit the maximum
torque of a motor.  In this way, damage is prevented to mechanisms,
attached to the clutch, when the end of the stroke is reached.