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Device for determining skin sensitivity

  • US 3,933,148 A
  • Filed: 04/12/1974
  • Issued: 01/20/1976
  • Est. Priority Date: 04/16/1973
  • Status: Expired due to Term
First Claim
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1. A device for determining the degree of skin sensitivity due to the persistence of a scratch trace on the skin surface produced by said device, comprising:

  • a housing having a base surface;

    at least one pressure element having one end extending into said housing and having a rounded trace producing surface on the other end thereof, said trace producing surface protruding from said housing at said base surface;

    compressible means within said housing in engagement with said pressure element, having a predetermined spring force, for compressing said at least one pressure element against the skin surface at a constant pressure of 250-500 gm/mm2 when said trace producing surface is depressed to said base surface,whereby said at least one pressure element is depressable into said housing at a constant pressure and therefore the pressure on the skin surface will be constant, thereby allowing a plurality of scratch traces to be applied to the skin surface at the same surface pressure.

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