Patent Model - Improvement in Fog and Alarm Horns

Maker and role
John Tarr, Patentee
Production date
Feb 25 1879
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Object detail

Metal, wood, ivory
5 3/8 x 12 3/8 x 7 1/4" (13.7 x 31.4 x 18.4cm)
John Blake Tarr's patent is an improvement on his earlier patent dated October 22, 1878. This patent's objective is "to supply the operator with a leverage power, whereby his own strength or manual power is made far more effective for operating the piston of the air-cylinder..." (Patent number: 212,635)
Object number
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