GB628574A - Improvements in automatic burglar and fire alarms - Google Patents
Improvements in automatic burglar and fire alarmsInfo
- Publication number
- GB628574A GB628574A GB26447/46A GB2644746A GB628574A GB 628574 A GB628574 A GB 628574A GB 26447/46 A GB26447/46 A GB 26447/46A GB 2644746 A GB2644746 A GB 2644746A GB 628574 A GB628574 A GB 628574A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dialling
- arm
- lever
- repetition
- dial
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
- H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Emergency Alarm Devices (AREA)
- Telephone Set Structure (AREA)
Abstract
628,574. Automatic exchange systems. MOUNTSTEPHEN, E. R. Sept. 3, 1946, No. 26447. [Class 40 (iv)] A fire, police, &c. alarm signal transmitter, substantially the same as that described in Specification 484,308, is provided with selectable means for either causing repetition of the dialling operation at predetermined intervals or for preventing repetition of said dialling operation after the first dialling operation has been completed. An annular rack 5 arranged concentrically above a telephone dial 9 is continuously 'driven by gearing from the gramophone motor and is fixed rigidly to a spindle 6 carrying a radial arm 8. A rotating cam 17, similarly driven, engages a pivoted lever 19, the free end of which rests upon the heavier end of a lever 21 pivoted at 22. The dial 9 is carried by a plate 12 hinged at 13 and provided with a catch 23 normally retained in position above the other end of lever 21 by spring means not shown. The dial carries upstanding lugs 15 and 16 at positions opposite numbers to be dialled. Lever 21 is rocked by the operation of the cam to alternately raise and lower the plate 12 and cause the lugs to be engaged successively by the arm 8 to dial the required number. The means for selectively causing or preventing repetition of dialling comprises a rotatable shaft 27 urged to the right by a spring 31 and carrying a radial arm 29 and a radial cranked arm 35. The shaft carries a pin 33 which normally finds abutment against a fixed, axially-slotted sleeve 34. To set the apparatus to prevent repetition of dialling, the arm 29 is moved into the path of a pin 36 carried by a gear-wheel 37 and is thereby displaced by the end of the dialling operation so that the pin 33 moves into the slot of sleeve 34 causing the member 35 to release the catch 23. The heavier, left-hand end of the lever then drops to disengage from the cam 17. To set for repetition of dialling, the arm 29 is turned back so that the member 35 is moved out of contact with the catch 23.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR956829D FR956829A (en) | 1946-09-03 | ||
| GB26447/46A GB628574A (en) | 1946-09-03 | 1946-09-03 | Improvements in automatic burglar and fire alarms |
| US786291A US2537599A (en) | 1946-09-03 | 1947-11-15 | Automatic burglar and fire alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB26447/46A GB628574A (en) | 1946-09-03 | 1946-09-03 | Improvements in automatic burglar and fire alarms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB628574A true GB628574A (en) | 1949-08-31 |
Family
ID=10243754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26447/46A Expired GB628574A (en) | 1946-09-03 | 1946-09-03 | Improvements in automatic burglar and fire alarms |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2537599A (en) |
| FR (1) | FR956829A (en) |
| GB (1) | GB628574A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118366270A (en) * | 2024-06-20 | 2024-07-19 | 厦门安瑞祥科技有限公司 | Intelligent fire alarm device and method based on Internet |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB682276A (en) * | 1950-06-07 | 1952-11-05 | Samuel Dunseith Mckellen | Improvements in or relating to automatic alarm devices |
| US2768239A (en) * | 1953-05-11 | 1956-10-23 | Elmer E Foster | Alarm system |
| US2830119A (en) * | 1954-02-19 | 1958-04-08 | John P Zimmerman | Emergency alarm and reporting system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1627612A (en) * | 1922-12-13 | 1927-05-10 | William J Luse | Alarm system |
| BE424390A (en) * | 1936-11-04 | |||
| BE426001A (en) * | 1937-02-15 |
-
0
- FR FR956829D patent/FR956829A/fr not_active Expired
-
1946
- 1946-09-03 GB GB26447/46A patent/GB628574A/en not_active Expired
-
1947
- 1947-11-15 US US786291A patent/US2537599A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118366270A (en) * | 2024-06-20 | 2024-07-19 | 厦门安瑞祥科技有限公司 | Intelligent fire alarm device and method based on Internet |
Also Published As
| Publication number | Publication date |
|---|---|
| FR956829A (en) | 1950-02-08 |
| US2537599A (en) | 1951-01-09 |
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