UNT Libraries Government Documents Department - 3 Matching Results

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Burglar-Alarm.

Description: Patent for a portable device that can be hung on a door knob and sound an alarm when the knob is turned, including instructions and illustrations.
Date: August 18, 1914
Creator: Dick, Archie P., Jr.
Item Type: Refine your search to only Patent

Car Coupling.

Description: Patent for a new and improved coupling for railroad cars. This design relates "especially to that class known as 'gravity-pin supports;' and the object thereof is to provide improved means for supporting the pin so that it can be operated from the top of the car, or so that it will drop automatically when two cars come together" (lines 9-14). It consists, "with the coupling-pin and a supporting-arm pivotally connected to the draw-head and to the upper end of said pin, of a weight carried by sai… more
Date: November 18, 1890
Creator: Epperson, Alexander
Item Type: Refine your search to only Patent

Well-Drilling Apparatus.

Description: Patent for a well-drilling apparatus for boring Artesian and other wells. It is meant to "provide simple, efficient, and durable means for expanding or spreading the reamer-blades after the bit-carrying devices have been lowered sufficiently to arrange the reamer-blades below the plane of the lower end of the tubular drill-rod" (lines 10-17). Water pressure is also used to remove the cuttings from the boring-blades. Sections of cable that suspend and lower drill-bit carrying parts into the dril… more
Date: February 18, 1896
Creator: Horton, Stephen A.
Item Type: Refine your search to only Patent
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