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Safety devices for electric circular saws

  • US 3,922,785 A
  • Filed: 11/12/1974
  • Issued: 12/02/1975
  • Est. Priority Date: 11/15/1973
  • Status: Expired due to Term
First Claim
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1. In combination with a safety device for an electrically driven hand operated circular saw, wherein a safety cover for a circular saw blade is provided rotatably in one direction to expose said saw blade and in the opposite direction to conceal said saw blade, and wherein means is provided for urging said safety cover in said opposite direction, the improvement which comprises:

  • an auxiliary switch connected in series to a main switch in an electric circuit between a power source and a motor for driving said saw blade; and

    means operationally associated with said safety cover and said auxiliary switch for maintaining said auxiliary switch in its operative position during rotation of said safety cover in said one direction, but turning said auxiliary switch into its inoperative position upon rotation of said safety cover in said opposite direction.

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