GB1439140A - Apparatus for switching an alarmsignalling device - Google Patents
Apparatus for switching an alarmsignalling deviceInfo
- Publication number
- GB1439140A GB1439140A GB5874172A GB5874172A GB1439140A GB 1439140 A GB1439140 A GB 1439140A GB 5874172 A GB5874172 A GB 5874172A GB 5874172 A GB5874172 A GB 5874172A GB 1439140 A GB1439140 A GB 1439140A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- movement
- magnetic
- alarmsignalling
- switching
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Discharge Of Articles From Conveyors (AREA)
- Level Indicators Using A Float (AREA)
Abstract
1439140 Magnetic switches PITTWAY CORP 20 June 1973 [31 Aug 1972] 58741/72 Heading H1N A movable magnet switch has contacts 30, 36 controlled by the movement of a permanent magnet 32 responsive to the movement of a magnetic member 13 and normally retained by a magnetic plate 37. The movement of the magnet is transmitted to the contact 36 by a lost-motion coupling between faces 50 and 52 of members 30, 51 attached to the magnet and opposite faces of the contact carrier 35. In an alternative arrangement (Fig, 3, not shown) the member 13 is permanently magnetized to repel the magnet 32 and the retaining plate 37 is mounted adjacent the end wall 21 of the switch housing 11 between the two magnets.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28535372A | 1972-08-31 | 1972-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1439140A true GB1439140A (en) | 1976-06-09 |
Family
ID=23093867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5874172A Expired GB1439140A (en) | 1972-08-31 | 1973-06-20 | Apparatus for switching an alarmsignalling device |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS504584A (en) |
| CA (1) | CA972788A (en) |
| DE (1) | DE2325017A1 (en) |
| FR (1) | FR2198247B1 (en) |
| GB (1) | GB1439140A (en) |
| IT (1) | IT974215B (en) |
| NL (1) | NL7215663A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2600581A (en) * | 1949-07-19 | 1952-06-17 | Schenendorf Benjamin | Magnetic circuit control for burglar alarms |
| DE1061660B (en) * | 1957-05-31 | 1959-07-16 | Siemens Ag | Electrical fuse arrangement |
| US3175060A (en) * | 1961-08-22 | 1965-03-23 | North Electric Co | Plunger operated magnetic electric switch |
| JPS443408Y1 (en) * | 1966-02-09 | 1969-02-07 | ||
| US3539957A (en) * | 1968-08-09 | 1970-11-10 | Aerolite Electronics Corp | Magnetic switch |
| US3539741A (en) * | 1969-08-08 | 1970-11-10 | Mallory & Co Inc P R | Magnetically activated door switch |
-
1972
- 1972-10-27 CA CA155,098A patent/CA972788A/en not_active Expired
- 1972-11-20 NL NL7215663A patent/NL7215663A/xx unknown
- 1972-12-21 IT IT5490872A patent/IT974215B/en active
-
1973
- 1973-01-18 JP JP743473A patent/JPS504584A/ja active Pending
- 1973-01-23 FR FR7302244A patent/FR2198247B1/fr not_active Expired
- 1973-05-17 DE DE19732325017 patent/DE2325017A1/en active Pending
- 1973-06-20 GB GB5874172A patent/GB1439140A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2325017A1 (en) | 1974-03-07 |
| FR2198247B1 (en) | 1977-04-29 |
| JPS504584A (en) | 1975-01-17 |
| NL7215663A (en) | 1974-03-04 |
| FR2198247A1 (en) | 1974-03-29 |
| CA972788A (en) | 1975-08-12 |
| IT974215B (en) | 1974-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |