FR887174A - Apparatus for electrical communications systems - Google Patents

Apparatus for electrical communications systems

Info

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
Application number
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR887174A publication Critical patent/FR887174A/en
Expired legal-status Critical Current

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)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Telephone Set Structure (AREA)
FR887174D 1941-01-24 1941-12-11 Apparatus for electrical communications systems Expired FR887174A (en)

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 (en) 1943-11-05

Family

ID=23482018

Family Applications (1)

Application Number Title Priority Date Filing Date
FR887174D Expired FR887174A (en) 1941-01-24 1941-12-11 Apparatus for electrical communications systems

Country Status (6)

Country Link
US (1) US2322851A (en)
BE (1) BE443017A (en)
CH (1) CH231797A (en)
FR (1) FR887174A (en)
GB (1) GB555527A (en)
NL (1) NL57098C (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
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 (en) * 1962-04-02 1963-05-30 Siemens Ag Arrangement for a telephone handset with local battery, preferably for a test telephone
DE1160019B (en) * 1962-05-05 1963-12-27 Telefonbau & Normalzeit Gmbh Telephone subscriber station with protective tube fork switch contacts
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 (en) * 1977-06-27 1979-03-23 Commissariat Energie Atomique ELECTRON INJECTOR FOR HYPERFREQUENCY GENERATOR
US4251694A (en) * 1979-08-16 1981-02-17 Western Electric Company, Inc. Tone-ringing circuits and methods for telephone sets
DE2941220C2 (en) * 1979-10-11 1983-03-24 Krone Gmbh, 1000 Berlin Electronically controlled hook switch for telecommunications equipment or the like.
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 (en) * 2015-11-10 2017-04-01 和碩聯合科技股份有限公司 Telephone device

Also Published As

Publication number Publication date
GB555527A (en) 1943-08-26
NL57098C (en)
US2322851A (en) 1943-06-29
BE443017A (en)
CH231797A (en) 1944-04-15

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