Browse Prior Art Database

Solenoid Enabled Door Latching Mechanism

IP.com Disclosure Number: IPCOM000115212D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 96K

Publishing Venue

IBM

Related People

Basco, JP: AUTHOR [+5]

Abstract

Described is a hardware implementation that provides a solenoid enabled door latching mechanism for door opening operations. The implementation is such that an enabling solenoid mechanism and latching parts are unaffected by forced actions or mishandling.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Solenoid Enabled Door Latching Mechanism

      Described is a hardware implementation that provides a solenoid
enabled door latching mechanism for door opening operations.  The
implementation is such that an enabling solenoid mechanism and
latching parts are unaffected by forced actions or mishandling.

      The latching mechanism is designed to actuate a door that must
be accessed by means of keyless operation.  In addition, the door
must be water and dust protected which requires gasket seals.  These
seals are compressed when the door is closed.  Since there is a large
compressive force from the gaskets, it does not allow reliable and
direct solenoid actuated release of the door.  As a result, the
actuating mechanism that will unlatch the door must be robust and
reliable.

      The concept described herein provides the appropriate
components needed to provide a reliable latching mechanism.  The
functions of the latch are designed to provide the following
advantages:
  o  A pushbutton design is used that facilitates a reliable seal, a
      shorter actuation motion and a minimum section profile when
      compared with other methods of actuation, such as sliding or
      rotating knobs.
  o  The mechanism is designed as a mechanical enabling device, such
      that a forceful action on a pushbutton is isolated from the
latch
      mechanics when the door is locked.  This feature discourages a
      user from trying to force an unlocked situation by using
      excessive pressure on the pushbutton which could otherwise
damage
      the mechanical linkages.
  o  The duty cycle of the energized solenoid electrical interface is
      controlled by the duration of the enabled condition.  This
energy
      pulse dwell to the solenoid is programmable by the user,
thereby
      enhanci...