GB985026A - Improvements in or relating to alarm systems for strongrooms or the like - Google Patents
Improvements in or relating to alarm systems for strongrooms or the likeInfo
- Publication number
- GB985026A GB985026A GB18970/61A GB1897061A GB985026A GB 985026 A GB985026 A GB 985026A GB 18970/61 A GB18970/61 A GB 18970/61A GB 1897061 A GB1897061 A GB 1897061A GB 985026 A GB985026 A GB 985026A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tape unit
- tape
- groups
- alarm
- code
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
- G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel
- G08B26/003—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel replying the identity and the state of the sensor
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
- Burglar Alarm Systems (AREA)
Abstract
985,026. Selective signalling systems. J. C. MACKEEN. May 25, 1961 [Nov. 23, 1960, No. 18970/61. Heading G4H. A location to be monitored includes a tape unit 8 having one or more magnetic or punched tapes carrying randomly selected code groups, an identical tape unit 2 is situated at a remote location, each tape unit being advanced one position after each interrogation and response, a comparator 5 giving an alarm indication if the code groups from the two tape units are not identical. Alarm detector elements 14 are arranged to modify the code group supplied by tape unit 8 when an alarm condition occurs. Instead of transmitting complete code groups, generator 9 may merely transmit an indication as to whether the code group being read from tape unit 8 is even or odd, or the sum of the groups is even or odd where more than one tape is being read. Communication may be over telephone wires.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71311A US3171108A (en) | 1960-11-23 | 1960-11-23 | Valuable protection system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB985026A true GB985026A (en) | 1965-03-03 |
Family
ID=22100539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18970/61A Expired GB985026A (en) | 1960-11-23 | 1961-05-25 | Improvements in or relating to alarm systems for strongrooms or the like |
Country Status (2)
Country | Link |
---|---|
US (1) | US3171108A (en) |
GB (1) | GB985026A (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3270338A (en) * | 1961-03-24 | 1966-08-30 | Gen Electric | Identification system |
GB972270A (en) * | 1961-12-21 | 1964-10-14 | Ralph Samuel Brennon | Improvements in or relating to alarm systems |
US3307147A (en) * | 1962-04-12 | 1967-02-28 | Telecredit | Telephone verification system |
US3384874A (en) * | 1963-03-04 | 1968-05-21 | Itt | Supervisory system having remote station selection by the number of pulses transmitted |
US3380023A (en) * | 1964-01-21 | 1968-04-23 | Motorola Inc | Electronic alarm system |
US3430218A (en) * | 1965-09-13 | 1969-02-25 | Charles P Healey | Alarm reporting system |
US3426348A (en) * | 1965-09-28 | 1969-02-04 | Chubb Mosler & Taylor Safes Lt | Electrical protection system |
US3984803A (en) * | 1967-09-06 | 1976-10-05 | The United States Of America As Represented By The United States Energy Research And Development Administration | Seismic intrusion detector system |
US3611361A (en) * | 1969-11-03 | 1971-10-05 | American Standard Inc | Alarm-monitoring system |
USRE29068E (en) * | 1971-04-30 | 1976-12-07 | WLW Corporation | Appliance removal alarm system for motels |
US3766540A (en) * | 1971-04-30 | 1973-10-16 | Hec Corp | Appliance removal alarm system for motels |
US3733602A (en) * | 1971-05-20 | 1973-05-15 | Motorola Inc | Microwave intrusion detecting system and apparatus |
JPS4847861A (en) * | 1971-10-19 | 1973-07-06 | ||
FR2526190B1 (en) * | 1982-04-30 | 1985-11-08 | Europ Teletransmission | METHOD FOR PROTECTING A REMOTE MONITORING SYSTEM AGAINST SABOTAGE AND SYSTEM IMPLEMENTING SAID METHOD |
FR2578372B1 (en) * | 1985-03-01 | 1987-05-15 | Fichet Bauche | METHOD FOR TRANSMITTING SIGNALS, IN PARTICULAR FOR MONITORING A SET OF ZONES TO BE PROTECTED, BETWEEN A CENTRAL STATION AND A PLURALITY OF DETECTION CIRCUITS CONNECTED THEREWITH BY A TRANSMISSION MEDIUM AND SYSTEM FOR IMPLEMENTING SAME SUCH A PROCESS |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL129550C (en) * | 1945-09-29 | |||
US2499225A (en) * | 1947-11-26 | 1950-02-28 | Rca Corp | Data transmission system |
US2978676A (en) * | 1950-07-24 | 1961-04-04 | Rca Corp | Selective signalling display system with checking and acknowledgment |
US3004253A (en) * | 1954-12-20 | 1961-10-10 | Hughes Aircraft Co | Iff system |
US2942238A (en) * | 1956-03-08 | 1960-06-21 | Westinghouse Air Brake Co | Remote control systems |
US3009134A (en) * | 1957-09-05 | 1961-11-14 | Bosch Arma Corp | Binary signal verification system |
-
1960
- 1960-11-23 US US71311A patent/US3171108A/en not_active Expired - Lifetime
-
1961
- 1961-05-25 GB GB18970/61A patent/GB985026A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3171108A (en) | 1965-02-23 |
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