Combination Door Check and Alarm.
Description:
Patent for a new and improved door-check and alarm. With this design, "[t]he latch normally stands in the engaging position, and when it aligns with one of the notches it engages the same automatically. One of the notches is so arranged that it is engaged by the latch when the door is closed, and when the knob is turned to open the door the cord, wire, or chain draws the latch out of engagement with the notch. . . . [a] bell on the end of the latch will give warning when the latch is moved, and…
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Date:
February 12, 1889
Creator:
King, Charles Rufus
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department