UNT Libraries Government Documents Department - 3 Matching Results

Search Results

Results: 1 - 3

Portable Dark Room.

Description: Patent for a new and improved portable dark room. This design "consists in a box provided with an opening in one side and a sleeve of pliable material extending outward from this opening, which box contains two smaller boxes for receiving the exposed and unexposed dry plates. The box is provided with a handle for carrying it" (lines 13-19).
Date: February 28, 1882
Creator: Serdinko, John
Item Type: Refine your search to only Patent

Pump-Operated Device

Description: Patent for "combination with a pump-operating crank-shaft and a walking-beam operatively connected with the pump-rod, means for preventing sudden movements of the pump-rod at the ends of its strokes and for assisting in starting the rod in its reciprocations" (lines 10-15).
Date: May 28, 1901
Creator: Crawford, Charles Buchanan
Item Type: Refine your search to only Patent
Back to Top of Screen