GB190804482A - Improvements in Electrical Alarm Locks. - Google Patents

Improvements in Electrical Alarm Locks.

Info

Publication number
GB190804482A
GB190804482A GB190804482DA GB190804482A GB 190804482 A GB190804482 A GB 190804482A GB 190804482D A GB190804482D A GB 190804482DA GB 190804482 A GB190804482 A GB 190804482A
Authority
GB
United Kingdom
Prior art keywords
alarm
ring
spindle
pin
lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
Louis Ernest Leopold Themke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB190804482A publication Critical patent/GB190804482A/en
Expired legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

4482. Themke, L. E. L. Feb. 28. Alarms, burglar, arranged in connexion with door latchmechanism. On the spindle 26 of the latch, is secured a ring 58 which carries a spring lever 63 and is in electrical connexion through the spindle and lock casing with a battery 70 let into the edge of the door. Carried by the knob plug 42 is a ring 67 which is connected by a wire 68 to an alarm. The spring of the lever 63 tends to place it in contact with the ring 67 so that the alarm is rung, but this is normally prevented by a pin 66 which is inserted into the spindle 26 from the outside and presses on the end of the lever. Anyone tampering with the lock from the outside and removing the pin 66 will cause the alarm to ring. The proper key acts in the same way as the pin 66 to stop the alarm.
GB190804482D 1908-02-28 1908-02-28 Improvements in Electrical Alarm Locks. Expired GB190804482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190804482T 1908-02-28

Publications (1)

Publication Number Publication Date
GB190804482A true GB190804482A (en) 1908-12-03

Family

ID=32207787

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190804482D Expired GB190804482A (en) 1908-02-28 1908-02-28 Improvements in Electrical Alarm Locks.

Country Status (1)

Country Link
GB (1) GB190804482A (en)

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