Tubular door lock with a bell

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

1986-10-28

1989-01-31

Stephan, Steven L.

Signals and indicators

Combined functions

Burglar alarms

116 97, 116153, G08B 1308

Patent

active

048008338

ABSTRACT:
A sort of tubular door lock whose inside knob or outside 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 at 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.

REFERENCES:
patent: 219314 (1879-09-01), Silva
patent: 356606 (1887-01-01), Thomas et al.
patent: 535288 (1895-03-01), Holman
patent: 691064 (1902-01-01), Lippincott
patent: 716471 (1902-12-01), Pickop et al.
patent: 818362 (1906-04-01), Edey
patent: 888725 (1908-05-01), Moore
patent: 983626 (1911-02-01), Kriz
patent: 1030841 (1912-06-01), Colounese et al.
patent: 3039423 (1962-06-01), Warn
patent: 4577584 (1986-03-01), Shih

Affiliated with

Also associated with

Rating

Tubular door lock with a bell does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tubular door lock with a bell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tubular door lock with a bell will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-172440