Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1979-06-11
1980-09-09
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
200 6178, 200 6193, 340545, G08B 1308
Patent
active
042220424
ABSTRACT:
An improved door alarm which is mounted on the inside of a door adjacent the hinged edge thereof sounds an audible alarm when the door is opened. A housing containing a buzzer and a battery is mounted on the door by a pressure-sensitive adhesive. An arming lever is pivotally mounted on the housing and together with a conductor extends outwardly therefrom and operatively engages an actuator block which is mounted on the door frame adjacent the alarm housing. The lever and conductor are operatively connected with the battery and buzzer to form an alarm circuit which will actuate the buzzer when brought into contact with each other at the actuator block. The actuator block has an insulated shelf with which a hooked end of the arming lever is engaged when the alarm is armed and an alarm actuating zone wherein the lever end disengages the shelf and engages an end of the conductor located therein to complete the alarm circuit and actuate the buzzer. The shelf has an undercut into which the hooked end of the lever moves if the door is closed after the buzzer has been actuated to maintain contact between the lever end and conductor to keep the buzzer sounding. The actuator block has an adjustable top wall on which the lever end can be placed when the occupant leaves the protected dwelling so that when the door closes, the lever end engages the shelf to arm the alarm for actuation when the door is next opened.
REFERENCES:
patent: 567176 (1896-09-01), Unger
patent: 1099777 (1914-06-01), Sundel
patent: 1110893 (1914-09-01), Caulkins
patent: 1377939 (1921-05-01), Sundel
patent: 2492474 (1949-12-01), Gempp
patent: 2824300 (1958-02-01), Rand
patent: 3121864 (1964-02-01), Bowman
patent: 3261010 (1966-07-01), Kardel
patent: 3270333 (1966-08-01), La Barber
patent: 3378830 (1968-04-01), Patrick
patent: 3768086 (1973-10-01), Powell et al.
patent: 3798627 (1974-03-01), Kaufman
patent: 3878539 (1975-04-01), Gooding
patent: 4059832 (1977-11-01), Conklin
patent: 4123752 (1978-10-01), Novotny
patent: 4124847 (1978-11-01), Cashman
LandOfFree
Door alarm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Door alarm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door alarm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2226577