Patent Model - Improvement in Nut-Lock

Maker and role
William Porter, Patentee
Pittsburg Forge and Iron Company, Assignee
Production date
Jun 01 1869
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Object detail

Iron, wood
2 1/2 x 11 1/2 x 2" (6.4 x 29.2 x 5.1cm)
Porter's patent is a "new and useful Improvements in Securing or Preventing Nuts from Turning on their Bolts"... and the "invention consists in using, in connection with a groove, or grooves in the plate, or other thing that the screw-bolt passes through, or is to secure, a groove, or grooves in the underside of the nut, and a key driven into any one of the series of grooves that match or are opposite to each other, and thus prevent the nut from turning, and avoid any necessity of bending up the key or pin." (Patent Number 90,685)
Object number
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