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Assembly of Conical Components with a Constant Pressure

IP.com Disclosure Number: IPCOM000110269D
Original Publication Date: 1992-Nov-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Goelz, E: AUTHOR [+2]

Abstract

This article concerns the assembly of conical components, in particular, thermoswitches, in keyboards.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Assembly of Conical Components with a Constant Pressure

       This article concerns the assembly of conical components,
in particular, thermoswitches, in keyboards.

      In order to prevent the formation of ice on keyboards, they
have to be heated at temperatures of less than 0oC.  For this
purpose, the temperature is monitored by a thermoswitch.

      From the state of the art two methods of assembling
thermoswitches in keyboards are known:
      1.  The thermoswitch is glued to the component to be monitored.
      2.  The thermoswitch, with a flange, is screwed firmly to the
component to be monitored.

      The new method is described in detail below with reference to
Figs. 1 and 2.

      The aluminum housing A is provided with a bore B.  A matching
O-ring is inserted into this bore.  Bore and O-ring are dimensioned
such that thermoswitch D, with the keyboard E not being in place,
protrudes slightly from the edge of the bore in the aluminum housing.

      Upon assembly of keyboard E, thermoswitch D with its entire
monitoring surface is forced by O-ring C at a constant pressure
against keyboard E.