EP0380314A1 - Schalter mit drahtloser Übertragung - Google Patents

Schalter mit drahtloser Übertragung Download PDF

Info

Publication number
EP0380314A1
EP0380314A1 EP90300724A EP90300724A EP0380314A1 EP 0380314 A1 EP0380314 A1 EP 0380314A1 EP 90300724 A EP90300724 A EP 90300724A EP 90300724 A EP90300724 A EP 90300724A EP 0380314 A1 EP0380314 A1 EP 0380314A1
Authority
EP
European Patent Office
Prior art keywords
switch
signal
wireless
circuit
circuit means
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.)
Withdrawn
Application number
EP90300724A
Other languages
English (en)
French (fr)
Inventor
Keisuke C/O Intellectual Property Center Konishi
Norio C/O Intellectual Property Office Iwakiri
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.)
Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
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
Priority claimed from JP1339389A external-priority patent/JPH02195617A/ja
Priority claimed from JP1538889A external-priority patent/JPH02197028A/ja
Priority claimed from JP1817689A external-priority patent/JPH02199728A/ja
Priority claimed from JP2346489A external-priority patent/JPH02204925A/ja
Application filed by Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Publication of EP0380314A1 publication Critical patent/EP0380314A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H21/285—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift having an operating arm actuated by the movement of the body and mounted on an axis converting its rotating movement into a rectilinear switch activating movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/0271—Bases, casings, or covers structurally combining a switch and an electronic component

Definitions

  • This invention relates to a switch in which the switch output (an ON or OFF signal) is delivered to external equipment in wireless fashion. More specifically, the invention relates to a wireless switch such as a limit switch, microswitch or photoelectric switch.
  • Limit switches in general use are as exemplified in Fig. 10.
  • a pair of limit switches 93A, 93B are provided.
  • the limit switches 93A, 93B are respectively situated at upper and lower limit positions of a vertically traveling slider 92 fitted on a moving machining table 91 of an apparatus.
  • the limit switches 93A, 93B are connected to a switch control unit 95 via respective cables 96 which take into account the allowable traveling distance of the machining table 91.
  • the cables 96 undergo flexing repeatedly whenever the moving machining table 91 travels, as a result of which fatigue develops in the terminal ends of the cables at which the connections are made. This can lead to severance of the cables.
  • wireless switches having a switch portion which detects motion of an actuator, and an oscillatory output portion which delivers an output to a remote location wirelessly at a prescribed frequency on the basis of a detection signal from the switch portion.
  • a switch portion which detects motion of an actuator
  • an oscillatory output portion which delivers an output to a remote location wirelessly at a prescribed frequency on the basis of a detection signal from the switch portion.
  • the arrangement is such that an internal switch, various circuits for controlling oscillatory output and a battery are housed within a switch case. This limits switch miniaturization and places a restriction upon battery size, as a result of which a sufficient battery capacity cannot be obtained.
  • the switch case often is located near the machining area of the apparatus or between mechanical members of the apparatus.
  • Another problem relating to the oscillatory output section is that the oscillatory output tends to fluctuate if the switch is located in an environment where it is susceptible to output wave interference produced by the machining area of the apparatus.
  • An object of the present invention is to provide a wireless switch in which an antenna possessing transmission directivity is fitted within a switch case to improve the output capability of the switch.
  • Another object of the present invention is to provide a wireless switch in which the state of battery consumption is accurately ascertained so that stabilized switch operation relative to associated equipment can be achieved while supervising battery replacement timing.
  • a further object of the present invention is to provide a wireless switch in which one type of wireless switch can be used as a general-purpose wireless switch in place of other types of wireless switches.
  • Yet another object of the present invention is to provide a wireless switch in which an oscillatory output section is extracted from the switch case and disposed externally of the case, thereby making possible stable transmission without output interference.
  • a wireless switch having a switch case formed into a box-shaped configuration, an oscillator circuit housed within the switch case for wirelessly delivering a switch signal oscillating at a prescribed frequency to a receiver at a remote location, and an oscillator circuit antenna housed within the switch case.
  • a side face of the switch case which corresponds to the receiver is formed to have an opening, and the opening is provided with a freely detachable switch cover.
  • the antenna which possesses transmission directivity with respect to the receiver, is fitted onto the inner surface of the switch cover.
  • the switch output signal is delivered to the receiver via the antenna, which is housed within the switch case and possessed of transmission directivity.
  • the switch output signal exhibiting directivity is received with a high degree of assurance.
  • the wireless switch obtained is reliable and highly stable, possesses a high output performance in which the directivity is highly resistant to noise, and raises reception sensitivity in an efficient manner.
  • a wireless switch comprising switch circuit means for outputting a switching signal in operative association with motion of an actuator displaced upon receiving an external force, oscillator circuit means for wirelessly outputting a signal of a prescribed frequency to a remote location, which is spaced apart from the wireless switch, based on the switching signal from the switch circuit means, a battery for driving the oscillator circuit means, voltage detecting means for detecting a voltage drop in the battery, and modulator circuit means for modulating an output of the oscillator circuit means based on a detection output from the voltage detecting means.
  • a drop in the output voltage of the battery is detected by the voltage detecting means when such a voltage drop occurs.
  • the modulator circuit means impresses a specific signal, which specifies the limit of the useful life of the wireless switch, on an oscillatory signal and transmits the result.
  • the operator is informed of the status of battery consumption, thus making it possible for the operator to know when to replace the battery and when to perform maintenance and inspection.
  • a temporary interruption in the operation of the apparatus due to depletion of the battery can be avoided, and the battery can be replaced when the apparatus is not being used. This raises efficiency.
  • a wireless switch comprising an actuator displaced upon receiving an external force, switch circuit means for outputting a switching signal in operative association with motion of the actuator, oscillator circuit means for wirelessly outputting a signal of a prescribed frequency to a remote location, which is spaced apart from the wireless switch, based on an output signal from the switch circuit means, and changeover means for changing over the oscillation frequency of the oscillator circuit means.
  • a wireless switch comprising an actuator displaced upon receiving an external force, switch circuit means for outputting a switching signal in operative association with motion of the actuator, oscillator circuit means for wirelessly outputting a signal of a prescribed frequency to a remote location, which is spaced away from the wireless switch, based on an output signal from the switch circuit means, modulator circuit means for modulating the oscillation frequency of the oscillator circuit means into a prescribed signal, and adjusting means for adjusting the signal frequency used by the modulator circuit means.
  • the changeover means is changed over in such a manner that the oscillation frequency of the already installed wireless switch fitted on the apparatus and the oscillation frequency of the new wireless switch will become the same.
  • the new switch is then substituted for the old.
  • the modulation frequency of the modulator circuit can be suitably modulated by the modulator circuit adjusting means so as to obtain a prescribed signal.
  • an already installed wireless switch can be replaced by the same type of wireless switch having the same oscillation frequency.
  • one type of wireless switch can be utilized as a variety of wireless switches.
  • a prescribed specific signal for distinguishing among a large number of mounted individual switches can be obtained merely by adjusting the modulation frequency of the modulator circuit.
  • a wireless switch comprising a switch portion for performing a switching operation in operative association with motion of an actuator displaced upon receiving an external force, and an oscillatory output portion for wirelessly outputting a switch signal to a remote location at a prescribed frequency based on an output signal from the switch portion, the oscillatory output portion being disposed separately at a position remote from a switch case housing the switch portion.
  • the output signal from the oscillatory output portion is delivered stably without being adversely influenced by the machining area of the apparatus.
  • the wireless switch obtained is reliable and highly stable, possesses a high output performance with high resistance to noise, and raises reception sensitivity in an efficient manner.
  • the switch case can be miniaturized. Since the battery of the oscillatory output portion also is situated externally of the switch case, a battery with a large capacity can be installed. Furthermore, if the oscillator circuit portion is to be replaced when the battery runs down, a circuit malfunction occurs or the frequency output is altered, the replacement can be made efficiently independently of the switch case.
  • Fig. 1 illustrates the mechanical construction of a wireless limit switch.
  • a limit switch 11 comprises an actuator 12 for sensing an external force, an internal switch 13 which switches in operative association with motion of the actuator, an oscillatory output portion 14 for modulating the output signal of the internal switch 13 and wirelessly outputting this modulated signal to a switch control unit at a remote location remote from the internal switch 13, and a box-shaped switch case 15 for holding these elements.
  • the actuator 12 has a distal end portion projecting outwardly from the switch case 15 and provided with a roller 12a situated at a position at which it is capable of sensing the external force of an apparatus, and a base portion secured to a rotary shaft 16 projecting from one side face of the switch case 15.
  • the end of the rotary shaft 16 inside the switch case 15 is formed into a flat, plate-shaped configuration having an upper flat surface 16a opposing a return spring 18 supported on a vertically movable spring support cylinder 17, and a lower flat surface 16b opposing a plunger 20 via a downwardly movable member 19.
  • the actuator 12 In the ordinary unloaded state, the actuator 12 is in a standby mode in which it is capable of sensing an external force. When the actuator 12 senses an external force and therefore is loaded to assume an inclined state, the rotary shaft 16 turns in one direction against the force of the spring.
  • the plunger 20 is reciprocated via the downwardly movable member 19 so that a plunger projection 20a depresses a push button 13a of the internal switch 13 in operative association with the reciprocating motion of the plunger 20, thereby turning the switch 13 ON and OFF.
  • the output signal produced by the internal switch 13 is introduced, via a conductive coil spring 21, to an oscillatory output portion 14 mounted on a printed circuit board 22 and composed of an oscillator circuit, a modulator circuit and the like.
  • the switch output signal is modulated by the oscillatory output portion 14, and the resulting modulated signal is transmitted wirelessly via a coil-shaped antenna 23.
  • the printed circuit board 22 and the antenna 23 are fitted integrally on the inner surface of a switch cover 24.
  • the latter has the shape of a flat plate and is detachably mounted on a case opening 15a formed in one side face of the switch case 15.
  • the coil-shaped antenna 23 is attached to the central portion of the cover 24 via an antenna support column 24a, and the output signal of the oscillatory output portion 14 is introduced to the antenna 23 via a connecting cord 25.
  • the transmitting direction of the antenna 23 is set at right angles to an outer face 24b of the support column 24a in order to take transmission performance into account.
  • the internal antenna is not readily susceptible to external influences, and an excellent transmission characteristic possessing directivity is provided.
  • both transmission and reception sensitivity can be improved by facing the outer surface 24b of the support column toward the receiver side.
  • Fig. 2 shows another embodiment of a limit switch illustrating this example.
  • an L-shaped switch cover 34 simultaneously covers both a side opening 32 and a bottom opening 33 of a switch case 31, the printed circuit board 22 is attached to the inner surface of the long side of the cover 34, and an antenna 37 supported on an antenna support column 36 is attached to the inner surface of the short side of the cover 34.
  • the antenna 37 possesses directivity and is arranged so that its transmission direction is at right angles to an outer face 36a of the support column. The reason for this arrangement is to obtain good transmission performance.
  • Fig. 3 is a circuit block diagram of the limit switch.
  • An oscillator circuit 26 has an oscillator function for outputting an oscillating signal having a prescribed oscillation frequency. This oscillating output signal is produced based on an output from a switching circuit 27 which has received a signal from the internal switch 13 indicative of detection of an external force.
  • the oscillating signal from the oscillator circuit 26 is modulated by a modulator circuit 28. As a result, a predetermined signal is outputted wirelessly to a switch control unit on the receiving side via the antenna 23.
  • a lithium battery 29 is accommodated in the case 15 as a power supply for driving each circuit.
  • a voltage detector circuit 30 is provided for detecting the state of consumption of the lithium battery 29.
  • the voltage detector circuit 30 detects that the voltage of the lithium battery 29 has fallen below a predetermined value near the output limit of the wireless switch, and the wireless limit switch intermittently outputs, e.g., in wireless fashion, the fact that a drop in battery voltage has been detected, via modulator circuit 28, thereby informing the operator that the lithium battery 29 should be replaced.
  • a switch control unit 41 On the side of a switch control unit 41 which receives this signal, as shown in Fig. 4, the oscillating signal rendered intermittent by the end of battery life is received by a receiver 42, which outputs a signal indicative of the end of battery life to a controller 43.
  • the controller 43 Upon receiving this signal, the controller 43 causes a warning indicator 44 to flash or emit a warning tone as a warning signal, by way of example. The operator is thus informed of the fact that the battery should be replaced or that maintenance and inspection should be carried out.
  • the warning is not limited to the receiving side but is issued also on the transmitting side, which is the side of the wireless switch proper.
  • the limit switch thus constructed is such that when the actuator 12 is displaced under the influence of an external force, the internal switch 13 issues an ON signal in operative association with the motion of the actuator, and the oscillatory output portion 14 wirelessly outputs a signal to the receiver side via the antenna 23 based on this ON signal.
  • the signal is delivered to the receiver side via the antenna 23 housed in the switch case 15 and possessing directivity.
  • the output signal is received with assurance.
  • the wireless switch obtained is reliable, the directivity is highly resistant to noise, and reception sensitivity is raised in an efficient manner.
  • the antenna and the printed circuit board on which the circuit and battery are mounted are integrally fitted on the inner surface of the switch cover.
  • the voltage detector circuit 30 detects this voltage drop.
  • the modulator circuit 28 modulates the output signal with a signal specifying that the switch has reached the limit of its useful life. The resulting signal is transmitted.
  • the end of the life of the lithium battery 29 is sensed, before it occurs, in response to reception of the abovementioned signal.
  • Fig. 5 illustrates another example of the oscillatory output portion.
  • a plurality of oscillator circuits 51, 52, ..., 5n which oscillate at different frequencies f1, f2, ..., fn, respectively, are provided.
  • a changeover switch 61 is capable of selecting any one of the oscillator circuits 51 - 5n.
  • the oscillatory output portion is provided with an oscillation function that lends this portion to various types of switches.
  • the changeover switch 61 can comprise an ordinary multiple-contact switch, short-circuit pins, etc.
  • the oscillatory signal from the selected oscillator circuit is modulated by a modulator circuit 62, from which a predetermined signal is wirelessly transmitted to the switch control unit on the receiver side via the antenna 23.
  • the switch control unit In response to wireless reception of this signal, the switch control unit outputs a prescribed control signal to the apparatus to be controlled.
  • Fig. 6 is a circuit block diagram of a limit switch having a frequency divider circuit 64.
  • the latter is capable of converting the oscillation frequency f of an oscillator circuit 63 into a specific frequency depending upon the frequency dividing ratio set by a changeover switch 61.
  • the carrier frequency of a modulator circuit 65 can be adjusted by being switched over to a predetermined modulation frequency by the changeover switch 61.
  • the limit switch is specified and distinguished from other limit switches.
  • the limit switch thus constructed is such that when the actuator 12 is displaced under the influence of an external force, the internal switch 13 issues an ON signal in operative association with the motion of the actuator, and the oscillatory output portion 14 wirelessly transmits a signal to the switch control unit on the receiver side via the antenna 23 based on this ON signal.
  • an already installed wireless switch can be replaced by the same type of wireless switch having the same oscillation frequency.
  • one type of wireless switch can be utilized as a wide variety of wireless switches.
  • a prescribed specific signal for distinguishing among a large number of mounted individual switches can be obtained merely by changing over the frequency divider circuit or changing over the modulation frequency of the modulator circuit.
  • Fig. 8 illustrates another embodiment of the invention.
  • the limit switch in this embodiment comprises an actuator 71A or 71B for sensing external force, a switch case body 72A or 72B for holding an internal switch (not shown) which performs a switching operation in operative association with motion of the actuator 71A or 71B, and an oscillatory output device 73 corresponding thereto.
  • This arrangement is provided with a vertically traveling slider 82 attached for vertical motion to a slide rail 83 erected on a moving machining table 81 of an apparatus.
  • the upper and lower switch case bodies 72A, 72B are disposed at positions opposing upper and lower limit positions, respectively, of a detecting end portion 84 of the vertically traveling slider 82.
  • the switch case bodies 72A, 72B are secured to upper and lower positions of a support column 74 erected on the moving machining table 81.
  • the oscillatory output device 73 is erected on the moving machining table 81 at a position rearward of the positions at which the switch case bodies 72A, 72B are attached. Thus the oscillatory output device 73 is arranged separately of the switch case bodies 72A, 72B remote therefrom. Connected to the oscillatory output device 73 are cables 85 which allow entry of the switch signals from the upper and lower switch case bodies 72A, 72B. Oscillatory output functions corresponding to the upper and lower switch case bodies 72A, 72B are thus provided.
  • the oscillatory output device 73 is disposed spaced apart from the switch case bodies 72A, 72B at a position, which is free from external influences, remote from a machining area which is a source of output interference. As a result, the oscillatory output device 73 has improved output performance and performs stabilized transmission.
  • a battery 77 having a comparatively large capacity and an oscillator circuit portion 78 such as an oscillator circuit and modulator circuit are housed within the oscillatory output device 73.
  • Internal switch signals from the switch case bodies 72A, 72B are modulated into output signals of prescribed frequencies by the oscillator circuit portion 78, and the resulting modulated signals are wirelessly outputted, via an antenna 79, to the switch control unit 76 at a location remote from the oscillatory output device 73.
  • the limit switch thus constructed is such that when the actuator 71A or 71B of the switch case body 72A or 72B is displaced under the influence of an external force, the internal switch issues an ON signal in operative association with the motion of the actuator, and the oscillatory output device 73, which is located rearwardly of switch case bodies 72A, 72B at a position remote therefrom, wirelessly outputs a signal to the switch control unit 76 on the receiver side based on the ON signal.
  • the output signal produced by the oscillatory output device 73 is sufficiently remote from the machining area of the apparatus and is not adversely influenced by electric wave interference generated by the machining area of the apparatus. This makes it possible to deliver a stable output.
  • the wireless switch has an excellent output performance with a high resistance to noise, is highly reliable and capable of raising reception sensitivity in an efficient manner.
  • the oscillatory output device 73 is disposed externally of the switch bodies 72A, 72B and spaced away therefrom, the switch bodies 72A, 72B can be reduced in size. Further, since the battery 77 of the oscillatory output device 73 also is situated externally of the switch case bodies, a large-capacity battery can be provided.
  • the replacement can be made efficiently without relation to the switch case bodies that are easy to install in small areas.
EP90300724A 1989-01-23 1990-01-23 Schalter mit drahtloser Übertragung Withdrawn EP0380314A1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP1339389A JPH02195617A (ja) 1989-01-23 1989-01-23 無線スイッチ
JP13393/89 1989-01-23
JP1538889A JPH02197028A (ja) 1989-01-25 1989-01-25 無線スイッチ
JP15388/89 1989-01-25
JP1817689A JPH02199728A (ja) 1989-01-27 1989-01-27 無線スイツチ
JP18176/89 1989-01-27
JP23464/89 1989-01-31
JP2346489A JPH02204925A (ja) 1989-01-31 1989-01-31 無線スイッチ

Publications (1)

Publication Number Publication Date
EP0380314A1 true EP0380314A1 (de) 1990-08-01

Family

ID=27455979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90300724A Withdrawn EP0380314A1 (de) 1989-01-23 1990-01-23 Schalter mit drahtloser Übertragung

Country Status (1)

Country Link
EP (1) EP0380314A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713308A3 (fr) * 1993-11-29 1995-06-09 Lorraine Laminage Système de consignation et déconsignation automatisé d'une installation industrielle comportant plusieurs organes à consigner ou déconsigner.
WO1998027522A1 (en) * 1996-12-17 1998-06-25 United Technologies Automotive, Inc. Wireless switching system
US6147420A (en) * 1997-12-16 2000-11-14 Lear Automotive Dearborn, Inc. Wireless switching system
WO2001048570A1 (de) * 1999-12-23 2001-07-05 Pilz Gmbh & Co. Schaltungsanordnung zum sicheren abschalten einer anlage, insbesondere einer maschinenanlage
EP3041011A1 (de) * 2014-12-29 2016-07-06 Eaton Corporation Steuersystem aufweisend einen schalter mit integriertem rfid-etikett

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7431264U (de) * 1975-10-16 Zeiss C Vorrichtung zur drahtlosen Fernsteuerung
US4056815A (en) * 1976-02-03 1977-11-01 Westinghouse Electric Corporation Battery operated transmitter circuit
EP0126195A1 (de) * 1982-10-15 1984-11-28 Renishaw plc Lagefühlende Vorrichtung
EP0216032A1 (de) * 1985-09-12 1987-04-01 Gte Valeron Corporation Sonde mit Mitteln zur Feststellung und Übertragung eines niedrigwertigen Batteriezustandes
DE8702611U1 (de) * 1987-02-20 1987-05-07 Peko Konstruktions Gmbh, 8960 Kempten, De
EP0221513A2 (de) * 1985-10-30 1987-05-13 Omron Tateisi Electronics Co. Endschalter
JPS63195921A (ja) * 1987-02-10 1988-08-15 オムロン株式会社 無線スイツチ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7431264U (de) * 1975-10-16 Zeiss C Vorrichtung zur drahtlosen Fernsteuerung
US4056815A (en) * 1976-02-03 1977-11-01 Westinghouse Electric Corporation Battery operated transmitter circuit
EP0126195A1 (de) * 1982-10-15 1984-11-28 Renishaw plc Lagefühlende Vorrichtung
EP0216032A1 (de) * 1985-09-12 1987-04-01 Gte Valeron Corporation Sonde mit Mitteln zur Feststellung und Übertragung eines niedrigwertigen Batteriezustandes
EP0221513A2 (de) * 1985-10-30 1987-05-13 Omron Tateisi Electronics Co. Endschalter
JPS63195921A (ja) * 1987-02-10 1988-08-15 オムロン株式会社 無線スイツチ
DE8702611U1 (de) * 1987-02-20 1987-05-07 Peko Konstruktions Gmbh, 8960 Kempten, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WERKSTATT UND BETRIEB *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713308A3 (fr) * 1993-11-29 1995-06-09 Lorraine Laminage Système de consignation et déconsignation automatisé d'une installation industrielle comportant plusieurs organes à consigner ou déconsigner.
WO1998027522A1 (en) * 1996-12-17 1998-06-25 United Technologies Automotive, Inc. Wireless switching system
US6147420A (en) * 1997-12-16 2000-11-14 Lear Automotive Dearborn, Inc. Wireless switching system
WO2001048570A1 (de) * 1999-12-23 2001-07-05 Pilz Gmbh & Co. Schaltungsanordnung zum sicheren abschalten einer anlage, insbesondere einer maschinenanlage
EP3041011A1 (de) * 2014-12-29 2016-07-06 Eaton Corporation Steuersystem aufweisend einen schalter mit integriertem rfid-etikett
US9514899B2 (en) 2014-12-29 2016-12-06 Eaton Corporation Control switch with integrated RFID tag

Similar Documents

Publication Publication Date Title
US7994924B2 (en) RFID tag based discrete contact position indication
US6618022B2 (en) Radio frequency powered switch
US7880100B2 (en) Electrical switch, as for controlling a flashlight
US4598243A (en) Direct-current power supply with alarm indicator
US6960922B2 (en) Apparatus for monitoring a sliding contact element in an electrical rotating machine
US5895985A (en) Switch remoting system
US6166506A (en) Wireless safety clutch
EA004070B1 (ru) Устройство дистанционного управления с автономным источником энергии, электрический аппарат и установка, содержащая это устройство и этот аппарат
EP0380314A1 (de) Schalter mit drahtloser Übertragung
US9035730B2 (en) Magnetic trigger mechanism and associated control method
JP2008171403A (ja) 無線出力センサ、近接センサ、加工装置、および制御システム
US4453152A (en) Sewing machine control
JP6509319B2 (ja) 農作業機用リモコン操作装置
US20020145532A1 (en) Configuration for wire-free supply of electric power to a large number of sensors and/or actuatiors, sensor or actuator for this purpose and system for a machine having a large number of sensors and/or actuators
JPH02195617A (ja) 無線スイッチ
US5541588A (en) Control signal transfer device for a position detecting sensor
JPH02199728A (ja) 無線スイツチ
KR101709913B1 (ko) 자동 발광 방식의 오작동 탐지 디바이스
US4918819A (en) Electric shaving apparatus
US7299691B2 (en) Sensor device for tire
US20070030114A1 (en) Device for communicating with a system
JPH02197028A (ja) 無線スイッチ
US20230296678A1 (en) Wireless process variable transmitter with removable power module
JPH06257838A (ja) 空気調和機のリモコン装置
JPS63195921A (ja) 無線スイツチ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900316

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI NL SE

18W Application withdrawn

Withdrawal date: 19911203

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

R18W Application withdrawn (corrected)

Effective date: 19911203