EP0788995B1 - Dispositif de surveillance et d'éclairage d'un interrupteur - Google Patents

Dispositif de surveillance et d'éclairage d'un interrupteur Download PDF

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Publication number
EP0788995B1
EP0788995B1 EP97100786A EP97100786A EP0788995B1 EP 0788995 B1 EP0788995 B1 EP 0788995B1 EP 97100786 A EP97100786 A EP 97100786A EP 97100786 A EP97100786 A EP 97100786A EP 0788995 B1 EP0788995 B1 EP 0788995B1
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EP
European Patent Office
Prior art keywords
switch
signal
line
lines
control circuit
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 - Lifetime
Application number
EP97100786A
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German (de)
English (en)
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EP0788995A1 (fr
Inventor
James L. Murphy
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Inventio AG
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Inventio AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/46—Adaptations of switches or switchgear
    • B66B1/461—Adaptations of switches or switchgear characterised by their shape or profile
    • B66B1/462—Mechanical or piezoelectric input devices

Definitions

  • the present invention relates generally a device for monitoring a plurality illuminated switch and in particular a device to maintain the illuminance of a Plurality of elevator call button switches during the poll after actuated switches.
  • the strength of the LED lighting is determined by the actual current determined by the facility flows, and indirectly through the voltage applied to the LED control circuit is created. For installations, where the applied to the LED and the drive circuit Voltage fluctuates, the level of lighting also fluctuates. An elevator installation with uncontrolled Power thus leads to LED illuminance levels fluctuate to unacceptable levels.
  • the present invention relates to a device for generating elevator call signals and displays of registered calls.
  • the device contains several manually operated push button switch means, each of the switch means being an illuminant to illuminate a push button of the switch means has an input means connected to the switch means for receiving an illumination signal first predetermined duration from a source of the illumination signal and one between the input means and connected to the enlightenment agent and to the Illuminating signal reacting pulse stretchers to Generating an output signal for a second predetermined one Time that is much longer than the first predetermined period of time, wherein the illuminant the output signal to illuminate the push button during approximately the second predetermined period of time responds.
  • the device also includes a first one Plurality of row lines and a second plurality of column lines and one over one of the row lines and one of the column lines with the input means of each of the switch means connected Control means so that a matrix is formed.
  • the Control means generates an interrogation signal on one Row line and in response receives on the a column line a signal triggered by the switch, when an associated one of the switch means operates becomes.
  • the control means generates in response to that of signal triggered the switch the lighting signal on one row line and one column line to that connected to the one operated switch Input means so that the enlightenment of the Push button is maintained.
  • the control means generates the interrogation signal during a first cycle time, that receives from that Switch triggered signal during a second cycle time and generates the lighting signal during a third cycle time.
  • the control means generates that Interrogation signal on the first plurality of row lines during the first cycle time and reads the second A plurality of column lines during the second cycle time, to the signal triggered by the switch received, the control means alternating the interrogation signal generated and reads the column lines.
  • the control means reacts to the triggered Switch signal to the during a fourth cycle time Interrogation signal on a selected one of the first Generate and while producing multiple row lines a fifth cycle time the second plurality of column lines to read the triggered by the switch Receive signal.
  • the control means generates the query signal and reads the control lines for each of the row lines alternately in order to to identify the one operated switch.
  • the signal triggered by the switch can be a size representing a call signal is generated when access to a switch operated by one assigned floor is permitted, by the Switch triggered signal is a second one Floor lock signal representing the size generated when access to the one operated switch assigned floor is prohibited.
  • the tax resource contains one for receiving the call signal with the column lines connected first shift register and a for receiving the call signal and the floor lock signal second connected to the column lines Shift register.
  • the control means includes one for generating the Interrogation signal and the lighting signal with the Third shift register connected to row lines and one for generating the lighting signal with the column lines connected fourth shift register.
  • the Control means generates the lighting signal on those the row lines and column lines that are assigned to each actuated of the switch means.
  • the device solves that with the illuminated call button circuits problems associated with the prior art.
  • the device includes one attached to each switch unique pulse stretching circuit that the LEDs with daver current which supplies the lighting quality by unscanned circuits is maintained.
  • the device creates on the column lines the matrix a voltage level swing to activate of a security access switch. There are no other wires between the control circuit for this and the switch matrix required.
  • the LED current in the device is via a Constant current control circuit controlled for everyone applied voltages in a predetermined range maintains a constant current. The lighting levels do not fluctuate with the applied voltage.
  • the effects of LED forward voltage fluctuations omitted, as in most LED drive circuits encountered fixed resistance is replaced by an active current control.
  • the controller is comparable to a variable one Resistance that automatically adjusts to a constant LED current and therefore a constant level of lighting maintain.
  • the circuit 10 has a modular structure and includes a switch module 11, a pulse stretcher module 12 and a lighting module 13.
  • Each call button one Elevator basket control is a single one Associated circuits 10.
  • the switch module 11 contains a normally open call button switch SW1 des Type, usually in an elevator car control panel built in for registering calls to destination floors is.
  • a push button 14 of the switch SW1 is pressed to bridge a pair of switch contacts 15 so that a signal is given to the car control. As below explained if the call has been registered the button is illuminated until the call has been done.
  • a first of the contacts 15 is via a first resistor 16 with a ROW terminal 17 a terminal block 18 connected.
  • Parallel to the resistance 16 is a single pole access control switch SW2 connected to shunt the resistor. If the switch SW2 is not installed, can be a jumper wire 19 as a shunt parallel to the resistance 16 connected. As explained below, if the resistor 16 is not shunted, a Call not registered when switch SW1 is pressed becomes. Terminal 17 is also through a second resistor 20 to the circuit ground potential and to one first input of a first NAND gate 21 connected. The other contact 15 of the switch SW1 is connected to a COLUMN terminal 22 of the terminal strip 18 a second input of the NAND gate 21 and over a third resistor 23 to the circuit ground potential switched on.
  • the NAND gate 21 is on with an output a first input of a second NAND gate 24 in Pulse stretcher module 12 connected.
  • a second entrance of NAND gate 24 is through a fourth resistor 25 to a terminal 26 with a positive potential of a first Power supply V1 connected. The output voltage the power supply is usually V1 five volts.
  • a first diode 27 is parallel to the resistor 25 connected, an anode with the second input of the NAND gate 24 is connected and a cathode is connected to the power supply terminal 26 is.
  • An output of the NAND gate 24 is on Pair of inputs of a third NAND gate 28 connected.
  • a capacitor 29 is between the second input of the NAND gate 24 and an output of the NAND gate 28 connected.
  • the output of NAND gate 28 is on a pair Inputs of a fourth NAND gate 30 in the lighting module 13 connected.
  • the NAND gate 30 is with an output via a fifth resistor 31 to one Base of a first NPN transistor 32 and to one Collector of a second NPN transistor 33 connected.
  • the transistor 32 is with an emitter via a sixth resistor 34 with the circuit ground potential connected, and also an emitter of the Transistor 33 is at the circuit ground potential connected.
  • a collector of transistor 32 is via a seventh resistor 35, a first LED (Light emitting diode) 36 and a second LED 37 with a Terminal 38 with positive potential of a second power supply V2 connected in series.
  • the second power supply V2 usually has an output voltage of twenty four volts.
  • the terminal 38 is with a Anode of LED 37 connected, a cathode of LED 37 is connected to an anode of LED 36 and a cathode the LED 36 is connected to the resistor 35.
  • the terminals 17 and 22 of the switch module 11 are, as explained below, to a control circuit connected.
  • Query signals are created to check whether the call button switch SW1 is operated, and on the COLUMN terminal 22 of the control circuit is activated when the switch is actuated generates a switch actuation signal.
  • lighting signals applied to terminals 17 and 22 to the call button to illuminate until the call has been taken care of is.
  • the inputs to the NAND gate 21 are located to logic "0" so that a logic "1" to the pulse stretcher module 12 is generated. Since both inputs to NAND gate 24 are at logic "1", that produces NAND gate 28 is a logic "1" to the lighting module 13.
  • NAND gate 30 generates a logic "0" that the transistors 32 and 33 turns off, so that by the LEDs 36 and 37 no current flows and the push button 14 is not illuminated.
  • LINE terminal 17 is regular an interrogation signal with a positive potential of five volts to check whether the Call button switch SW1 is closed. With open The query signal does not appear on switch SW1 COLUMN terminal 22 or the first input to the NAND gate 21.
  • the NAND gate 21 continues to be the first Input of the NAND gate 24 with an output signal generate positive potential of logical "1", which is why it in the pulse stretcher module 12 or in the lighting module 13 there are no changes.
  • NAND gate 30 responds by generating one Switching signal with logic "1" to the transistors 32nd and 33 turn on and LEDs 36 and 37 light up. Since the voltage across capacitor 29 cannot change immediately, the second changes Input of the NAND gate 28 to the logic "0" level Zero potential and charges according to the of the values of the resistor 25 and the capacitor defined Charging time constant to level "1". While the loading time, the query signal is ended and the first Input to NAND gate 24 returns to logic "1" back. If the second input to NAND gate 24 after the charging delay reaches the logic level "1", the outputs of NAND gates 24, 28 and 30 switch Logic level so that transistors 32 and 33 are turned off become.
  • the resistor 16 is neither from the switch SW2 still shunted by the jumper wire 19 has been, as explained below, by appropriate Choice of the value for the resistance 16 to Example as 4.32 k ⁇ , the size of the on the LINE terminal 17 applied five-volt query signal on the COLUMN clamp 18 is reduced so that, for example, a Floor lock signal of 0.8 volts than that of the Switch triggered signal is generated which indicates that access to the corresponding floor is limited and no call is registered for this floor should.
  • FIG 2 is an interrogation and lighting circuit 50 for generating the interrogation signals the LINE terminal 17 each of the elevator call button switch and lighting circuits 10 in an elevator car operator control shown.
  • Circuit 50 asks a matrix of eight rows and seven columns starting in the up to fifty-six of the switch circuits 10 each with one of the rows and one of the columns can be connected.
  • a data input line 51 (DATA IN) from an elevator basket control not shown is on a serial data input a first shift register 52 with parallel input and serial output such as a shift register 74HC165 connected.
  • the controller becomes a serial on line 51 Data stream generated a plurality of cycles.
  • a serial Data output of shift register 52 is at one serial data input of a second shift register 53 with parallel input and serial output connected.
  • a serial data output from the shift register 53 is on a serial data input a first shift register 54 with serial input and parallel output such as a shift register 74HC595 connected.
  • a serial data output shift register 54 is to a serial Data input of a second shift register 55 with serial input and parallel output connected.
  • a serial data output of shift register 55 is connected to a data output line 56 which with a data input line of a further circuit 50 or the elevator car control can be.
  • a data clock line 57 (DATA CLK) from the Elevator control is at a clock input each of the Shift registers 52, 53, 54 and 55 connected to the to control serial data flow through circuit 50.
  • a column data load line 58 (COL DATA LOAD) from the Elevator cage control is on a parallel Data load input of each of shift registers 52 and 53 connected to data caching parallel inputs of these registers in the data stream to control.
  • a row and column output latch line 59 (R&C OUT LATCH) from the elevator car control is on a parallel Data latch input of each of the shift registers 54 and 55 connected to the caching of Data in the data stream in the parallel outputs of these Control register.
  • An LED output enable line 60 (LED OUT ENABLE) is from the controller to one Output enable input of shift register 54, the output of the buffered signals release from this register in a targeted manner.
  • the shift register 55 has eight parallel ones Output channels, each assigned by an of eight line signal lines 61 to an associated one Input of a resistor array 62 are connected. Each input of the array 62 has one end separate resistor connected, its opposite End with a separate output from the array connected is.
  • the outputs of the array 62 are through eight line signal lines 63 to assigned inputs a peak voltage absorption circuit 64 such as Example from Harris Semiconductor available circuit SP720AP connected.
  • a diode 65 is in line with the lower of lines 63 switched, with an anode with one on negative Potential input of the peak voltage absorption circuit 64 and a cathode with the array output connected is.
  • Another diode 66 is with an anode to the cathode of diode 65 and with a cathode connected to the first power supply V1, which too with an input of positive potential Circuit 64 is connected.
  • a capacitor 67 is between the anode of diode 65 and the cathode of the diode 66 switched.
  • the anode of diode 65 is also on the circuit ground potential.
  • the resistance array 62, circuit 64, diode 65, diode 66 and capacitor 67 protect the electronics in the Circuit 50 before static discharge.
  • a pair of line signal lines 63 are on assigned to a pair of LINE terminals 68 and 69 a terminal block 70 connected.
  • Each of the clamps 68 and 69 can be assigned to a row terminal 17 the elevator call button switch shown in FIG. and lighting circuits 10 may be connected.
  • the Peak voltage absorption circuit 64 has seven further inputs, each by an assigned of the seven column signal lines 71 with associated Inputs of a resistor array 72 connected are.
  • the resistor array 72 contains seven resistors, each with one end connected to one of the lines 71 and with an opposite end over a ground line 73 with the circuit ground potential are connected.
  • Each resistor in the array 72 has has a value of approximately 820 ohms and works with the not shunt resistor 16 in the circuit 10 together such that the size of the switch triggered signal on column signal lines 71 reduced to the floor lock signal of approximately 0.8 volts becomes.
  • the column signal lines 71 are also included associated inputs of a resistor array 74, with outputs via seven column signal lines 75 with seven assigned parallel outputs of the shift register 54 are connected.
  • the resistance array 74 also works with circuit 64 together in that the electronics in the circuit 50 is protected against static discharge.
  • the Column signal lines 71 are associated with the seven COLUMN terminals 76 of the terminal block 70 connected. Thus, signals that are on the parallel outputs of the shift register 54, through which Column lines 75, resistor array 74 and Column lines 71 to the COLUMN terminals 22 from assigned to those connected to COLUMN terminals 76 Circuits 10 generated.
  • the terminal block 70 is representative of four such strips that are required are to all of the eight line signal lines 63 to connect.
  • Each of the column signal lines 75 is also on an input of an associated inverter 77 and on a non-inverting input of an associated Comparator 78 connected.
  • the inverter 77 is representative of seven such inverters, at which are Schmitt trigger inverters 74HC14 can, and the comparator 78 is representative for seven such comparators, which are the comparator LM324 can trade.
  • One exit each Inverters 77 is parallel with one of seven Inputs of the shift register 53 connected.
  • the inverter 77 produces an output signal only in response on the call signal of five volts.
  • An output of every comparator 78 is parallel with one of seven Inputs of the shift register 52 connected.
  • An amplifier 79 has a non-inverting input, via a resistor 80 to the first power supply V1 and via a resistor 81 with the circuit ground potential connected is.
  • An inverting Input of amplifier 79 is connected to an output, to an inverting input of each of the Comparator 78 is connected.
  • the amplifier 79 generates a reference voltage level of approximately 0.7 volts, which causes the comparators to respond both on the five-volt call signal and on the Floor lock signal of 0.8 volts give a signal.
  • the shift register 52 thus receives from the switch triggered signals (call signals and floor blocking signals), which are operated by the call button switch SW1, and the shift register 53 only receives ringing signals of operated call button switches.
  • a line 82 connects an eighth parallel Input of shift register 53 and an eighth parallel output of the shift register 54 with a Input of an inverter 83, in which an output with an eighth parallel input of shift register 52 connected is.
  • the output of inverter 83 is too connected to an anode of an LED 84, in which one Cathode via a resistor 85 to the circuit ground potential is created.
  • the elevator control During operation, the elevator control generates the Data stream on DATA-IN line 51 and a clock signal on the DATA CLOCK line 57 to complete one polling cycle from interrogation signal data into shift register 55 to slide in.
  • the query signal data in the shift register 55 are connected to the parallel outputs of one by the control on the R&C OUT LATCH line 59 generated signal temporarily, whereas a Signal on LED-OUT-ENABLE line 60 the shift register prevents signals on the column lines 75 to spend.
  • the line interrogation signals representing the line signal lines 61, the resistor array 62, the Line signal lines 63 and the LINE terminals 68 and 69 each of the four terminal strips 70 to all of the ROW terminals 17 of the circuits 10 are created.
  • Each Circuit 10 with an actuated call button switch SW1 is a call signal or a at its COLUMN terminal 22 Generate floor lock signal that at the assigned of COLUMN terminals 76 are input to circuit 50 becomes.
  • a call signal is considered logical "0" over the column lines 71, the resistor array 74, the column lines 75 and the inverter 77 to an associated parallel input of the shift register 53 is applied.
  • the absence of any call signals is considered logical "1" created.
  • a call signal or a floor lock signal is considered logical "1" across the column lines 71, the resistor array 74, the column lines 75 and the comparators 77 to an associated one parallel input of the shift register 52 applied.
  • the absence of anyone triggered by a switch Signals are created as logic "0".
  • the control clocks while the query cycle is postponed a read cycle of the data stream and generated a signal on the COL-DATA-LOAD line 58 to indicate the Column data from shift registers 52 and 53 in the Insert reading cycle
  • FIG 3 is a flow chart of the data cycles for the circuit 50 generating program shown.
  • the controller starts the cycles on one Circle 90 START and the program jumps to an instruction set 91 GENERATE INQUIRY SIGNALS which initiates to get the interrogation signals from the Generate shift register 55 on all eight lines.
  • the program jumps to an instruction set 92 COLUMNS READ one of the read cycle for the input of the signals at the inputs of shift registers 52 and 53 initiates.
  • the program jumps to a decision point 93 ANY SW1? one on which the The controller checks whether any of the switches SW1 has been operated. If none of the switches SW1 is pressed, the program branches back to NO to instruction set 91.
  • the loop continues as long as until at least one actuated switch is detected, whereupon the program at YES to start a second loop to an instruction set 94 LINE X QUERY branches.
  • instruction set 94 directs the Control a query cycle for the first line, after which the program COLUMNS 95 into an instruction set READ jumps in, which is a read cycle for reading the Introduces column data for the selected row.
  • the program then jumps to a decision point 96 LAST LINE? and branches to the instruction set if NO 94 back to one poll cycle for the second line initiate. So the program saves time by executing the first loop until a operated switch is detected, and by the executes the second loop only if the operated switches via its row and column connections must be identified. If the eighth Line has been queried, the program branches in Point 96 if YES to instruction set 91, the first Start loop again.
  • the Lighting cycle may be in the first loop may be included, but it can also interrupt the program the first loop.
  • the interruption cycle generates lighting signals for the column and line corresponding to the registered call, where the signals are loaded into shift registers 54 and 55, respectively become.
  • the controller generates signals on the LED-OUT-ENABLE line 60 and on the R&C OUT LATCH line 59, to give a lighting signal of logic "1" to each of the Inputs of the NAND gate 21 in the associated circuit 10 to create.
  • the pulse stretching module 12 extends the period during which LEDs 36 and 37 are turned on for a multiple of the duration of the Polling, reading and lighting cycle, e.g. about one Second to illuminate the push button on one maintain an acceptable level.
  • the eighth output of the shift register 54 can be used to indicate that a lighting cycle is performed.
  • a signal with logic “0” becomes a logic signal from the inverter 83 "1" changed to illuminate LED 84 and one to provide visual indication of the lighting cycle.
  • the logic "0" at the eighth input of shift register 53 and the logical “1" at the eighth input of the shift register 52 can be read to control to inform that the lighting cycle is running has been.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Elevator Control (AREA)
  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (7)

  1. Dispositif pour surveiller et éclairer au moins un commutateur à commande manuelle d'un panneau de commande prévu pour l'entrée d'appels dans un ascenseur, dans lequel un circuit de commande explore l'état de commutation du commutateur et, en fonction de cet état de commutation, génère des signaux pour l'éclairage du commutateur,
       caractérisé en ce qu'il est prévu un module de commutateur (11) avec le commutateur (SW1), qui est relié à l'aide de conducteurs (17, 22) au circuit de commande (50), ledit circuit de commande (50) générant sur le premier conducteur (17) un signal d'interrogation et recevant sur le second conducteur (22) un signal déclenché par le commutateur (SW1),
       en ce qu'il est prévu un module d'étalement des impulsions (12) qui allonge le signal d'éclairage déclenché par le circuit de commande (50) à partir de l'état de commutation du commutateur (SW1), et
       en ce qu'il est prévu un module d'éclairage (13) qui éclaire le commutateur (SW1) pendant la durée du signal d'éclairage allongé.
  2. Dispositif selon la revendication 1, caractérisé en ce que le circuit de commande (50) comporte des circuits de commutation (52, 53, 54, 55) pour faire fonctionner plusieurs conducteurs (17, 22) auxquels plusieurs modules de commutateur (11) peuvent être raccordés en formant une matrice.
  3. Dispositif selon la revendication 2, caractérisé en ce qu'il est prévu un conducteur de lignes (17) avec le signal d'interrogation, et un conducteur de colonnes (22) avec le signal déclenché par le commutateur (SW1), qui sont raccordés au circuit de commande (50) et à un comparateur (21) du module de commutateur (11), et en ce qu'un premier contact (15) du commutateur (SW1) est raccordé au conducteur de colonnes (22) tandis qu'un second contact (15) du commutateur (SW1) est raccordé par l'intermédiaire d'une résistance (16) au conducteur de lignes (17).
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le module d'étalement des impulsions (12) comporte un comparateur (24) et un inverseur (28) par l'intermédiaire desquels un élément RC (25, 29) est relié pour allonger le signal.
  5. Dispositif selon la revendication 4, caractérisé en ce que le signal de sortie du module d'étalement d'impulsions (12) est transmis à un excitateur (30) du module d'éclairage (13), qui alimente une source de courant constant (32, 33), laquelle allume et éteint des diodes lumineuses (36, 37) éclairant le commutateur (SW1).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu un autre commutateur (SW2) pour bloquer et débloquer le commutateur (SW1), ledit commutateur (SW2) modifiant en tension le signal déclenché par le commutateur (SW1).
  7. Dispositif selon la revendication 6, caractérisé en ce que l'autre commutateur (SW2) est raccordé par l'intermédiaire de la résistance (16).
EP97100786A 1996-02-06 1997-01-20 Dispositif de surveillance et d'éclairage d'un interrupteur Expired - Lifetime EP0788995B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/597,693 US5726399A (en) 1996-02-06 1996-02-06 Apparatus for scanning elevator call buttons
US597693 1996-02-06

Publications (2)

Publication Number Publication Date
EP0788995A1 EP0788995A1 (fr) 1997-08-13
EP0788995B1 true EP0788995B1 (fr) 2001-06-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100786A Expired - Lifetime EP0788995B1 (fr) 1996-02-06 1997-01-20 Dispositif de surveillance et d'éclairage d'un interrupteur

Country Status (7)

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US (1) US5726399A (fr)
EP (1) EP0788995B1 (fr)
JP (1) JPH09227039A (fr)
CN (1) CN1164505A (fr)
AT (1) ATE202538T1 (fr)
CA (1) CA2196731C (fr)
DE (1) DE59703878D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101992977B (zh) * 2009-08-17 2013-10-30 杭州优迈科技有限公司 电梯轿厢的操纵箱及其控制方法
CN101992978B (zh) * 2009-08-17 2013-08-14 杭州优迈科技有限公司 超薄型电梯操纵箱及其控制方法
US9916781B2 (en) 2012-03-02 2018-03-13 Michael Shipman Illuminated vehicular sign
EP3428102B1 (fr) 2017-07-11 2019-11-20 Otis Elevator Company Systèmes et procédés d'inspection automatique de composant d'ascenseur
CN115385211A (zh) * 2022-07-21 2022-11-25 展鹏科技股份有限公司 一种电梯光幕信号接收装置及电梯光幕系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022296A (en) * 1975-05-16 1977-05-10 Westinghouse Electric Corporation Signal input devices and systems
US4190836A (en) * 1976-11-15 1980-02-26 Hitachi, Ltd. Dynamic drive circuit for light-emitting diodes
US4134107A (en) * 1977-03-11 1979-01-09 Miller George E Replacement elevator call button assembly
US4230206A (en) * 1978-10-17 1980-10-28 Otis Elevator Company Transistorized elevator control button
JPS56108670A (en) * 1980-01-29 1981-08-28 Mitsubishi Electric Corp Converter for calling signal of elevator
CH656598A5 (de) * 1982-08-18 1986-07-15 Inventio Ag Schaltungseinrichtung mit leitungsmatrix zur signaluebertragung in aufzugsanlagen.
US4805739A (en) * 1988-01-14 1989-02-21 U.S. Elevator Corporation Elevator control switch and position indicator assembly
JPH02205912A (ja) * 1989-02-03 1990-08-15 Fanuc Ltd マトリクス制御回路
US5454448A (en) * 1992-10-21 1995-10-03 Otis Elevator Company Elevator call buttons having plural illuminated indications of availability and use
US5398783A (en) * 1993-02-02 1995-03-21 Otis Elevator Company Elevator hall call device with integral indicator display element

Also Published As

Publication number Publication date
DE59703878D1 (de) 2001-08-02
CA2196731C (fr) 2005-08-16
CA2196731A1 (fr) 1997-08-07
EP0788995A1 (fr) 1997-08-13
JPH09227039A (ja) 1997-09-02
ATE202538T1 (de) 2001-07-15
CN1164505A (zh) 1997-11-12
US5726399A (en) 1998-03-10

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