FR887174A - Appareils pour systèmes de communications électriques - Google Patents
Appareils pour systèmes de communications électriquesInfo
- Publication number
- FR887174A FR887174A FR887174DA FR887174A FR 887174 A FR887174 A FR 887174A FR 887174D A FR887174D A FR 887174DA FR 887174 A FR887174 A FR 887174A
- Authority
- FR
- France
- Prior art keywords
- communications systems
- electrical communications
- electrical
- systems
- communications
- 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
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
-
- 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
- H01H36/0006—Permanent magnet actuating reed switches
- H01H36/0046—Limit switches, also fail-safe operation or anti-tamper considerations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
- H04M1/06—Hooks; Cradles
- H04M1/10—Hooks; Cradles associated with switches operated by magnetic effect due to proximity of receiver or hand-set
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US375717A US2322851A (en) | 1941-01-24 | 1941-01-24 | Magnetic switch hook |
Publications (1)
Publication Number | Publication Date |
---|---|
FR887174A true FR887174A (fr) | 1943-11-05 |
Family
ID=23482018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR887174D Expired FR887174A (fr) | 1941-01-24 | 1941-12-11 | Appareils pour systèmes de communications électriques |
Country Status (6)
Country | Link |
---|---|
US (1) | US2322851A (da) |
BE (1) | BE443017A (da) |
CH (1) | CH231797A (da) |
FR (1) | FR887174A (da) |
GB (1) | GB555527A (da) |
NL (1) | NL57098C (da) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2431319A (en) * | 1943-02-09 | 1947-11-25 | Walter B Ellwood | Magnetic firing device |
US2523297A (en) * | 1945-08-02 | 1950-09-26 | Charles E Hastings | Frequency meter |
US2623128A (en) * | 1946-03-15 | 1952-12-23 | Automatic Telephone & Elect | Telephone instrument with magnetic handset latch |
US2546647A (en) * | 1946-08-01 | 1951-03-27 | Automatic Elect Lab | Magnet operated sealed switchboard |
US2672523A (en) * | 1949-09-16 | 1954-03-16 | Bell Telephone Labor Inc | Telephone subscriber |
US2673252A (en) * | 1949-09-28 | 1954-03-23 | Automatic Elect Lab | Magnetic cradle switch |
US2636933A (en) * | 1949-11-21 | 1953-04-28 | Allis Chalmers Mfg Co | Control system responsive to presence of magnetic materials |
US2848572A (en) * | 1957-03-06 | 1958-08-19 | Bendix Aviat Corp | Electrical disconnect plug |
US2912540A (en) * | 1958-02-13 | 1959-11-10 | American District Telegraph Co | Defeat resistant burglar alarm contact |
US3005885A (en) * | 1958-09-12 | 1961-10-24 | Foxboro Co | Safety switch arrangements |
US3009033A (en) * | 1959-04-20 | 1961-11-14 | Gen Electric | Limit switches |
US3157747A (en) * | 1960-05-10 | 1964-11-17 | Bell Telephone Labor Inc | Automatic selecting switch |
DE1149398B (de) * | 1962-04-02 | 1963-05-30 | Siemens Ag | Anordnung fuer einen Fernsprechhandapparat mit Ortsbatterie, vorzugsweise fuer einen Prueffernsprecher |
DE1160019B (de) * | 1962-05-05 | 1963-12-27 | Telefonbau & Normalzeit Gmbh | Fernsprechteilnehmerstation mit Schutzrohrgabelumschalterkontakten |
US3147819A (en) * | 1963-06-13 | 1964-09-08 | Timothy B Keleher | Seat belt control for ignition system |
US3305805A (en) * | 1963-11-14 | 1967-02-21 | Tann David | Proximity switch |
GB1038229A (en) * | 1963-11-29 | 1966-08-10 | Ass Elect Ind | Improvements relating to subscriber's telephone instruments |
FR2401508A1 (fr) * | 1977-06-27 | 1979-03-23 | Commissariat Energie Atomique | Injecteur d'electrons pour generateur hyperfrequence |
US4251694A (en) * | 1979-08-16 | 1981-02-17 | Western Electric Company, Inc. | Tone-ringing circuits and methods for telephone sets |
DE2941220C2 (de) * | 1979-10-11 | 1983-03-24 | Krone Gmbh, 1000 Berlin | Elektronisch gesteuerter Gabelumschalter für fernmeldetechnische Geräte o.dgl. |
EP0128500A3 (en) * | 1983-06-14 | 1986-08-20 | Telelogic, Inc. | Telephone with cradle having no moving parts |
US4581490A (en) * | 1983-12-22 | 1986-04-08 | Richard Genender | Wall telephone assembly |
US4675903A (en) * | 1984-06-29 | 1987-06-23 | Wang Laboratories, Inc. | Telephone handset assembly |
US6289100B1 (en) * | 1999-03-09 | 2001-09-11 | Hubbell Incorporated | Communications station having hall effect device for controlling hookswitch operations |
TWI577165B (zh) * | 2015-11-10 | 2017-04-01 | 和碩聯合科技股份有限公司 | 電話裝置 |
-
0
- BE BE443017D patent/BE443017A/xx unknown
- NL NL57098D patent/NL57098C/xx active
-
1941
- 1941-01-24 US US375717A patent/US2322851A/en not_active Expired - Lifetime
- 1941-12-11 FR FR887174D patent/FR887174A/fr not_active Expired
-
1942
- 1942-03-09 CH CH231797D patent/CH231797A/de unknown
- 1942-03-28 GB GB4175/42A patent/GB555527A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE443017A (da) | |
US2322851A (en) | 1943-06-29 |
GB555527A (en) | 1943-08-26 |
CH231797A (de) | 1944-04-15 |
NL57098C (da) |
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