UNT Libraries Government Documents Department - 3 Matching Results

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Switch-Stand.

Description: Patent for a switch stand that automatically switches to danger when unlocked and has independently rotating switch operating spindles and target spindles.
Date: October 19, 1915
Creator: Praetorius, Richard P.
Item Type: Refine your search to only Patent

Bicycle.

Description: Patent for a bicycle that has a drive wheel, a ratchet wheel attached to the drive wheel, a chain that goes around the ratchet wheel, an apparatus for reciprocating the chain, a guideway from the chain to the ratchet wheel, a knob on the chain that engages the guideway, a pair of levers connected to the chain, and a chord that connects the levers to the chain.
Date: February 19, 1895
Creator: Williams, Elbert D.
Item Type: Refine your search to only Patent
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