Tubular door lock with a bell

Details Tubular door lock with a bell Tubular door lock with a bell

G - Physics

08

B

292/1

G08B 13/08 (2006.01) E05C 1/16 (2006.01)

Patent

CA 1277350

ABSTRACT OF THE DISCLOSURE A sort of tubular door lock whose inside knob or out- side knob can be forced to rotate by each other's rotation and force a rotating unit to turn pushing and overpassing a projection of a knocking spring to get the knocking points st its both ends to knock on a bell for ringing. In addition, when said inside knob is locked up, the outside knob has no supporting force for making the latch rotated but can give an idle turning only.

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