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US 4,283,612 AGranted
Machine guarding apparatus
AssigneeBaltimore Aircoil Company, Inc.
InventorEdward G. Richards
Life of this patent
Estimating the term…
Abstract
An apparatus for eliminating accidents on power machines such as brake presses which comprises in combination a safety pedal, proximity switch and metal plate.
Claims3
A method for eliminating accidents on machines having dangerous propensities which comprises:
- (a) locating a strip of metal a sufficient distance from the machine so that one cannot stand on the metal and reach into the machine,
- (b) placing a foot pedal switch on said strip,
- (c) connecting a proximity switch to the foot pedal switch, which proximity switch only activates when it is near metal,
- (d) activating the machine by continuously pressing down on the foot pedal switch while said foot pedal switch and proximity switch are located on the metal strip.
1 more element
Dependencies are inferred from the claim text.