GB1331902A - Inductive proximity switch - Google Patents

Inductive proximity switch

Info

Publication number
GB1331902A
GB1331902A GB623672A GB623672A GB1331902A GB 1331902 A GB1331902 A GB 1331902A GB 623672 A GB623672 A GB 623672A GB 623672 A GB623672 A GB 623672A GB 1331902 A GB1331902 A GB 1331902A
Authority
GB
United Kingdom
Prior art keywords
damping
transistor
circuit
switch
oscillator
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
GB623672A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1331902A publication Critical patent/GB1331902A/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
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/9502—Measures for increasing reliability
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electronic Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

1331902 Proximity switches INTERNATIONAL STANDARD ELECTRIC CORP 10 Feb 1972 [15 Feb 1971] 6236/72 Heading G1N An inductive proximity switch of the type in which the oscillations of an oscillator 1 are damped by a conducting and/or ferromagnetic body moving past an inductance 5 forming part of the oscillator circuit is provided with a controllable damping circuit 4 for checking the operation of the switch. When a control signal is applied to terminal 7 of the damping circuit transistor T2 conducts thereby damping the oscillator circuit 1. If the circuit is operating correctly the damping has the same effect as a body being detected and the oscillations of transistor T3 cease causing transistor T1 to switch off and produce a step voltage at 6. Transistor T2 may be replaced by two transistors enabling the damping to be performed in two stages. By replacing transistors T2 by an FET the latter may be used as a variable resistor and a variable control signal may be applied thereto.
GB623672A 1971-02-15 1972-02-10 Inductive proximity switch Expired GB1331902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712107145 DE2107145A1 (en) 1971-02-15 1971-02-15 Inductive proximity switch

Publications (1)

Publication Number Publication Date
GB1331902A true GB1331902A (en) 1973-09-26

Family

ID=5798816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB623672A Expired GB1331902A (en) 1971-02-15 1972-02-10 Inductive proximity switch

Country Status (3)

Country Link
DE (1) DE2107145A1 (en)
GB (1) GB1331902A (en)
NL (1) NL7201680A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541009A1 (en) * 1983-02-15 1984-08-17 Gd Spa SYSTEM FOR CONTROLLING THE OPERATION OF INPUT TRANSDUCERS OF A CENTRAL CONTROL AND CONTROL UNIT FOR MACHINES AND / OR DEVICES USED IN PRODUCTION LINES AND / OR PRODUCT PACKAGING LINES

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4433309A (en) * 1980-03-01 1984-02-21 Gebhard Balluff Fabrik Feinmechanischer Proximity switch with built-in test circuit
DE3007929C2 (en) * 1980-03-01 1986-10-23 Gebhard Balluff, Fabrik Feinmechanischer Erzeugnisse, 7303 Neuhausen Contactless controllable proximity switch
EP0191272A1 (en) * 1985-02-12 1986-08-20 KEIPER RECARO S.p.A. Apparatus for limiting the range of movement of an object movable by a motor-driven device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541009A1 (en) * 1983-02-15 1984-08-17 Gd Spa SYSTEM FOR CONTROLLING THE OPERATION OF INPUT TRANSDUCERS OF A CENTRAL CONTROL AND CONTROL UNIT FOR MACHINES AND / OR DEVICES USED IN PRODUCTION LINES AND / OR PRODUCT PACKAGING LINES
DE3347457A1 (en) * 1983-02-15 1984-08-23 G.D S.P.A., Bologna ARRANGEMENT FOR MONITORING THE OPERATION OF INPUT CONVERTERS OF A CENTRAL CONTROL AND MONITORING UNIT FOR MACHINES AND / OR DEVICES APPLICABLE IN MANUFACTURING AND / OR PACKAGING FLOWERS
GB2135459A (en) * 1983-02-15 1984-08-30 Gd Spa A system for monitoring the operation of machines usable in production and/or product packaging lines

Also Published As

Publication number Publication date
NL7201680A (en) 1972-08-17
DE2107145A1 (en) 1972-08-24

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees