UNT Libraries Government Documents Department - 16 Matching Results

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Wrench.

Description: Patent for a wrench whose jaws can be adjusted quickly by pressing a handle on the wrench with the thumb.
Date: July 27, 1909
Creator: Ferguson, Rufus Andrew
Item Type: Refine your search to only Patent

Relay.

Description: Patent for an electric relay "which is normally actuated by weak currents, and adapted when abnormally energized by heavier currents to shift the local current from one connection to another in order to prevent the relay armature from sticking" (lines 10-15).
Date: May 18, 1909
Creator: Rice, Hugh C.
Item Type: Refine your search to only Patent

Obstetrical Device.

Description: Patent for an obstetrical device that consists of metal knee braces and hand holds, which allows pressure to be exerted on the knees by either the patient or a doctor which helps the mother's pushing power to increase and shorten labor.
Date: November 16, 1909
Creator: Barnes, Henry J.
Item Type: Refine your search to only Patent
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