GB1215114A - Improvements relating to electric switching devices - Google Patents

Improvements relating to electric switching devices

Info

Publication number
GB1215114A
GB1215114A GB27139/69A GB2713969A GB1215114A GB 1215114 A GB1215114 A GB 1215114A GB 27139/69 A GB27139/69 A GB 27139/69A GB 2713969 A GB2713969 A GB 2713969A GB 1215114 A GB1215114 A GB 1215114A
Authority
GB
United Kingdom
Prior art keywords
windings
core
ferromagnetic
coil
decimal
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
GB27139/69A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Publication of GB1215114A publication Critical patent/GB1215114A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element

Landscapes

  • Linear Motors (AREA)
  • Keying Circuit Devices (AREA)
  • Electromagnets (AREA)

Abstract

1,215,114. Non contact making switches. FERRANTI Ltd. 29 May, 1969 [4 June, 1968], No. 27139/69. Heading H3B. In an electrical switching device, series connected and opposed windings 18A, 18B, Fig. 2, are located between ferromagnetic members 10 in an air-gap in which a coil 14, Fig. 1, carrying an alternating current and wound on a ferromagnetic member 12, produces a varying magnetic flux, a resulting output being produced across the windings 18A, 18B when a movable ferromagnetic core 24 is inserted into winding 18A. The core is biased away from the windings by a spring 26, and has an end stop 29. A recess may be provided in the lower member 10 to accommodate the core end in its lower position. Any alternating or pulsed waveform may be used in coil 14. The core may pass through a number of windings, for example three in Fig. 5, which represent the three binary digits of the decimal number 7. Numeral 7 is marked on the upper face of core end piece 28 so that the device may be used as a decimal to binary converter. Fixed cores may be used in some of the windings.
GB27139/69A 1968-06-04 1969-05-29 Improvements relating to electric switching devices Expired GB1215114A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73446568A 1968-06-04 1968-06-04

Publications (1)

Publication Number Publication Date
GB1215114A true GB1215114A (en) 1970-12-09

Family

ID=24951803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27139/69A Expired GB1215114A (en) 1968-06-04 1969-05-29 Improvements relating to electric switching devices

Country Status (4)

Country Link
US (1) US3522442A (en)
DE (1) DE1928294B2 (en)
FR (1) FR2010089A1 (en)
GB (1) GB1215114A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4411758B4 (en) * 1994-04-06 2006-04-13 Siemens Ag Device for detecting a mechanical contact between two components, in particular for motor vehicles

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494109A (en) * 1978-09-27 1985-01-15 Bernin Victor M Noncontacting keyboard employing a transformer element
US4300127A (en) * 1978-09-27 1981-11-10 Bernin Victor M Solid state noncontacting keyboard employing a differential transformer element
DE2905282C2 (en) * 1979-02-12 1982-05-27 W. Gessmann GmbH, 7105 Leingarten Switching device that generates an electrical output variable due to a mechanical movement
US4283714A (en) * 1979-08-08 1981-08-11 Texas Instruments Incorporated Magnetic keyboard system
US4401986A (en) * 1979-12-26 1983-08-30 Texas Instruments Incorporated Position sensor and system
US4398180A (en) * 1980-06-26 1983-08-09 International Standard Electric Corporation Contactless keyboard
DE3836733A1 (en) * 1988-10-28 1990-05-03 Mannesmann Kienzle Gmbh CIRCUIT ARRANGEMENT FOR SETTING THE TRIGGER POINT IN AN INDUCTIVE KEYBOARD
JPH10228314A (en) 1997-02-14 1998-08-25 Nippon Signal Co Ltd:The Monitor device for signal transmission system by transformer coupling

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2347315A (en) * 1940-08-02 1944-04-25 Ferrocart Corp Radio receiver
US3054976A (en) * 1958-11-18 1962-09-18 Schaevitz Engineering Differential transformer
US3142762A (en) * 1960-01-22 1964-07-28 Kelk Ltd George Magnetically actuated switch device
US3313877A (en) * 1964-07-10 1967-04-11 Walter G Finch Electronic organ keying device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4411758B4 (en) * 1994-04-06 2006-04-13 Siemens Ag Device for detecting a mechanical contact between two components, in particular for motor vehicles

Also Published As

Publication number Publication date
DE1928294B2 (en) 1971-06-24
US3522442A (en) 1970-08-04
FR2010089A1 (en) 1970-02-13
DE1928294A1 (en) 1970-02-19

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