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US 4,279,137 AGranted
Security device
OwnerRoy O. Cookinventor
Life of this patent
Estimating the term…
Abstract
A device for preventing a dead bolt handle from being turned, comprising a knob encompassing portion depending from a handle accommodating housing. Said encompassing portion and housing so coact that the tendency of said device to rotate on said handle being turned is barred by said knob encompassing portion abutting a door knob.
Claims1
A security device for use in conjunction with a door having a knob and a dead bolt, said device comprising:
- a rigid, planar body portion including a pair of spaced apart legs forming the lower part thereof so spaced so as to straddle the shaft of said knob;
- a vertically elongated aperture through said body of such size as to permit the handle of said dead bolt to pass therethrough and so arranged as to permit the body above the aperture to pivot about the handle shaft;
- and
- means to prevent said handle from rotating sufficiently to open said dead bolt, said preventing means including said legs, a pair of struts affixed to said body portion on opposite sides of said elongated aperture and separated by a distance less than the length of the handle of said dead bolt, and a plate member connecting said struts adjacent the upper reaches of said elongated aperture, said plate, struts and body portion forming a cavity for receiving one end of said dead bolt handle yet blocking rotation of said handle.
1 more element
Dependencies are inferred from the claim text.