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Monitor actuating device and reusable fastener therefor

  • US 4,000,543 A
  • Filed: 12/02/1975
  • Issued: 01/04/1977
  • Est. Priority Date: 12/02/1975
  • Status: Expired due to Term
First Claim
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1. A reusable fastener for attachment to the end of a shaft, said fastener comprising:

  • a generally hollow body having an upper generally dome shaped portion and a lower portion, said lower portion defining a bore opening to the bottom surface of said lower portion for receipt of the shaft, said lower portion including a generally tubular member at least partially defining the bore adjacent the opening thereto axially movable relative to the dome shaped portion, said tubular member having an outer cam surface tapered radially inwardly and towards the opening to the bore, radially inwardly directed force on said cam surface being effective to move said member towards said dome shaped portion; and

    a resilient one-piece spring steel clip mounted within said body, said clip having a base axially fixed and freely rotatable relative to said dome shaped portion, said base being generally annular in cross-section and the axis of rotation of the base being substantially coaxial with the axis of the bore, said clip having an aperture therethrough sized to receive said shaft, said clip having a first non-deformed position in which said aperture will not register with said bore and a second resiliently deformed position in which said aperture will substantially register with said bore, said axially movable tubular member being engageable with said clip to urge said clip towards said second position when said tubular member is moved axially towards said dome shaped portion.

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