WO1997006090A1 - Elevator door restrictor - Google Patents
Elevator door restrictor Download PDFInfo
- Publication number
- WO1997006090A1 WO1997006090A1 PCT/US1996/012541 US9612541W WO9706090A1 WO 1997006090 A1 WO1997006090 A1 WO 1997006090A1 US 9612541 W US9612541 W US 9612541W WO 9706090 A1 WO9706090 A1 WO 9706090A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- car
- door
- floor
- inner door
- elevator
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
- B66B13/18—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors
- B66B13/185—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
Definitions
- the present invention relates in general to controls for elevators, and in particular to an elevator door restrictor for preventing elevator doors from being opened between floors.
- a new national standard for elevator codes has recently been promulgated by the American Society of Mechanical Engineers, and has been widely adopted by many local building code authorities. It reguires door restrictors for blocking the inner doors of elevators from being pushed open more than a total of four (4) inches when elevator cars are disposed between floors.
- the code provides a standard that the elevator must be within eighteen (18) inches of being perfectly aligned at a floor before the door restrictor allows the inner doors to be pushed open.
- the inner elevator doors may be pushed open a slight distance, not more than a total of four (4) inches, so that persons trapped within an elevator car between floors may look out into the elevator shaft, call for help and circulate fresh air.
- Prior art elevator door restrictors have been provided by mechanical latches which prevent the inner doors of elevator cars from being pushed open when the elevator cars are between floors.
- the prior art mechanical latches have mechanical linkages which engage cams located at each floor to move the mechanical latches from a latched position to an unlatched position when the elevator passes by each floor.
- These prior art mechanical latches do not prevent the inner doors from being pushed open while elevator cars are moving past a floor.
- the mechanical linkages are typically noisy, making noise as the elevator passes each floor.
- An elevator is provided with a car, an inner door mounted to the car and outer doors mounted to floor openings which define floor zones, wherein the inner door registers with the outer doors when the car is disposed within one of the floor zones.
- the elevator includes a door restrictor having an electric solenoid mounted to the car so that the inner door cannot be opened more than four inches when the elevator is between floor zones.
- the electric solenoid has a plunger which is normally in an extended position to block the inner door from opening. Power will only be applied to the electric solenoid to lift the plunger from the extended position to a retracted position to allow the inner door to be fully opened when both the car is disposed within a floor zone and the inner doors are being opened by the main elevator controls.
- a photo sensor is mounted to the car to provide a floor zone sensing means for detecting when the elevator is disposed within one of the floor zones.
- a photo sensor is mounted to the car to provide a door sensing means for detecting when the inner door is being opened by the main elevator controls.
- a controller operates the electric solenoid to lift the plunger from the extended position to the retracted position in response to receiving both a door data signal from the door sensing means and a floor zone data signal from the floor zone sensing means.
- Figure 1 is a perspective view depicting an elevator having a door restrictor made according to the present invention
- Figure 2 is a sectional view of the elevator of Figure 1, taken along section line 2-2 of Figure 1;
- Figure 3 is a top, sectional view of the elevator of Figure 1, taken along section line 3-3 of Figure 2;
- Figures 4A and 4B together comprise a schematic diagram depicting the electrical circuits of a controller board for a door restrictor of the present invention.
- FIG 1 is perspective view of elevator 11 having car 13 to which inner doors 15 are mounted. Car 13 travels between floors at which inner doors 15 register with outer doors 17. As shown in Figure 1, inner doors
- 15 includes two doors 15a and 15b which open in opposite directions, one to the left and the other to the right.
- Outer doors 17 cover floor openings 19.
- Floor openings 19 define floor zones 21, one of which elevator car 13 is shown being disposed within.
- Outer doors 17 are preferably mechanically connected with inner doors 15 at each floor so that they will be moved open and closed as inner doors 15 are opened and closed.
- Figure 2 is a side view of elevator 11, taken along line 2-2 of Figure 1.
- Outer doors 17 are mounted to outer door tracks 23 which extend above floor opening 19.
- Rollers 25 extend into outer door tracks 23 for movably supporting outer doors 17.
- Mounting brackets 27 are used to mount roller 25 to outer doors 17.
- Inner doors 15 are mounted to car 13 by inner door track 29.
- Rollers 31 extend from mounting brackets 33 into inner door tracks 29 to movably support inner doors 15.
- Mounting brackets 33 fasten rollers 31 to inner doors 15.
- swing arm 35 extends from inner doors 15 to drive motor 37.
- Main elevator control 39 which is depicted in phantom, is typically located at the top of the elevator shaft and is connected to control panel 40, which is mounted within car 13 for persons to select the floors to which elevator car 13 is moved.
- Main elevator control panel controls vertical movement of elevator car 13 and operation of drive motor 37 to operate swing arm 35 to open inner doors 15 and outer doors 17.
- Wiring trough 41 extends on the top of elevator car 13 to provide power to lights which are mounted within car 13.
- elevator door restrictor 42 of the present invention includes controller 43, a first photo sensor 45 and a second photo sensor 49.
- Photo sensors 45, 49 are commercially available photoelectric sensors.
- First photo sensor 45 is mounted to car 13 to provide a floor zone sensing means for detecting when one of reflective targets 47 (one shown) is in close proximity to sensor 45.
- Reflective targets 47 are preferably strips of tape having a outward facing, reflective surface.
- reflective targets 47 are each 36 inches long and mounted to the elevator shaft so that the vertical center of one of the reflective targets 47 (one shown) will be detected when car 13 is centered within one of floor zones 21.
- Reflective targets 47 are up to 36 inches long so that inner doors 15 may begin to be opened while elevator car 13 is still moving into position within one of floor zones 21, within 18 inches of being centered within the floor zone.
- One of reflective targets 47 is mounted within each floor zone.
- Second photo sensor 49 provides a door sensing means for detecting when reflective target 51 has been moved.
- reflective target 51 is shown as being mounted to the car side of one of inner doors 15, door 15b.
- reflective target means 51 may be mounted to the other side of one of inner doors 15, such as on an angle iron mounted facing outer doors 17.
- reflective target 51 is preferably mounted so that it will not be detected until inner door 15b has been opened a short distance, which is preferably not more than two (2) inches.
- the opposite end of reflective target 15 should be positioned so that second photo sensor 49 will stop detecting the presence of reflective target 51 a short distance prior to inner door 15b being fully opened.
- second photo sensor 49 and reflective target 51 may be arranged such that reflective target 51 will only be detected both when inner door 15b is fully opened and fully closed.
- the primary purpose for second photo sensor 49 and reflective target 51 is to detect when doors 15 are being moved, or has been moved a short distance, so that power will not be continually applied solenoid 53 when inner doors 15 are fully opened. Doors 15a and 15b are connected together so that one will not move without the other being moved.
- Photo sensors 45, 49 are preferably mounted at an angle to reflective targets 47, 51, respectively, rather than being mounted to pass light along a line of sight which extends directly perpendicular to reflective targets 47, 51.
- the mounting angle between a line which extends perpendicular to the flat surface of reflective targets 47, 51 and a line of sight along which photo sensors 45, 49 emit light, respectively, should be between 10 degrees and 45 degrees. This will help prevent false signalling, such as may be occur with shiny surfaces such as stainless steel.
- photo sensors 45, 49 should be installed at a minimum of 6 inches to a maximum of 6 feet from reflective targets 47, 51, respectively.
- electronic door restrictor 42 of the present invention further includes electric solenoid 53, which provides a latching means.
- Electric solenoid 53 has a plunger 55 which provides a blocking member which is movable from an extended position to a retracted position.
- plunger 55 will be disposed in the extended position prior to application of power to solenoid 53, and plunger 55 will move to a retracted position after application of power to solenoid 53.
- Electric solenoid 53 is preferably a 12 volt solenoid.
- controller 43 controls operation of solenoid 53 in response to data signals detected by photo sensors 45, 49.
- Controller 43 may be mounted within elevator control panel 40, but preferably is mounted within a separate enclosure, as shown in Figure 1.
- Controller 43 includes a lead acid type of storage battery 69 and a circuit board 71.
- External power is provided by 110 volts AC from wiring trough 41, which is used to power the lights inside of elevator car 13.
- Battery 69 is preferably a 12 volt DC rated battery, which provides for operation of electronic door restrictor 42 of the present invention when external power from wiring trough 41 is lost.
- FIG 3 is a top, sectional view of elevator 11, taken along section line 3-3 of Figure 2.
- blocking bracket 57 is mounted to one of inner door mounting brackets 33.
- a blocking rod 59 extends from blocking bracket 57 a short distance 61 from the position which electric solenoid 53 is mounted when inner doors 15 are closed.
- Distance 61 is preferably not more than two (2) inches when double door types of assemblies are used for inner door 15, in which each of two doors opens in opposite directions, such as doors 15a and 15b. This prevents inner doors 15a and 15b from being opened more than a total of four (4) inches before blocking rod 59 encounters plunger 55 of electric solenoid 53.
- Header 63 is mounted to car 13 and provides a main support to which inner door track 29 and drive motor 37 are mounted.
- FIGS 4A and 4B together comprise a schematic diagram depicting circuit board 71, showing the control relays mounted to board 71 in their normal positions, prior to applying power to actuate the relay coils.
- Circuit board 71 provides a main control means for electronic elevator door restrictor 42 of the present invention.
- Circuit board 71 has a connector 73 with external power terminals 75, 77 which are preferably connected to 110 volts AC, single phase, found in wiring trough 1 (shown in Figure 1) .
- a positive battery connection 79 and negative battery connection 81 are used for connecting circuit board 71 to 12 volt rated battery 69.
- Ground fuse 83 is provided for fusing between the negative lead of external battery 69 and the ground 84 for circuit board 71.
- Terminals 75, 77 connect to transformer 85, which is connected to rectifier bridge 87.
- the rated output of transformer 85 is 16 volts AC, and the rated output of rectifier bridge 87 is 18 volts DC.
- Capacitor 89 is provided between the output of bridge 87 and ground 84 of circuit board 71.
- Voltage regulator 91 is connected to the output of bridge 87 and provides a regulated output voltage of 13.6 volts DC, which provides the nominally rated 12 volts DC to power the +12 V nodes of board 71 shown in Figures 4A and 4B.
- Capacitors 93, 97, and resistors 98, 99 are connected to the voltage regulator 91.
- Switch 103 is an on/off switch for connecting 12 volt power to node 105, which schematically represents the 12 volt power supplied to the circuit board.
- Node 107 is connected directly to terminal 79 in connector 73, which is directly connected to battery 69.
- the output from voltage regulator 109 will charge battery 69, passing through switch 109 in its normal position. Additionally, if switch 103 is in the on position (shown in Figure 4B) , and external power fails so that it is no longer applied to circuit board 71, battery 69 will pass electric current through switches 109 and 103 to node 105 to power circuit board 71. If switch 103 is pushed to the off position, power will not be supplied to circuit board 71 from either the battery 69 or voltage regulator 91.
- Test switch 109 when pushed downward, connects electrical power from battery 69 at node 107 to buzzer 111.
- Buzzer 111 is connected to component 113 which includes a timing circuit so that buzzer 111 will emit a pulsed audible signal.
- Transistor 115, resistors 117 and capacitors 119 are also connected to timing component 113.
- an external power detection relay 121 is schematically depicted by coil 123, and contacts 125, 127. External power detection relay 121 is shown in a normally open position, with power not being applied across coil 123. When the output from voltage regulator 91 is operating at the nominally rated 12 volts DC, power will be applied across coil 123 to energize relay 121.
- Terminals 131, 133 and 135 of connector 129 are connected across contact 127 of relay 121. Actuating relay 121 will open a normally closed connection across terminals 131 and 133, of connector 129, and will close a normally open connection across terminals 133, 135, of connector 129.
- Terminals 131 and 133, or 133 and 135, are provided for wiring to the door open button of the elevator control panel 40 mounted within car 13, which is connected to main control panel 39. If external power is no longer applied to circuit board 71, such as if a power failure occurs, the elevator doors 15, 17 will remain open at the first floor at which the elevator stops and the doors open. Since some elevator manufacturers reguire normally open connections to operate the door button and other elevator manufacturers reguire normally closed connections, both types are provided by terminals 131, 133 and 135 at connector 129.
- Connector 147 has jumper terminals 149, 151, and 153.
- other types of proximity sensors other than photo sensors may be used in place of both photo sensors 45, 49, such as magnetic reed switches, microswitches, inductive proximity sensors and the like.
- Connector 147 are provided for adapting a circuit board 71 for use when other types of proximity sensors are being used for a door sensing means, in place of photo sensor 49.
- photo sensor 49 is utilized for detecting whether inner doors 15 are being moved, a jumper wire is connected across terminals 151 and 153 of connector 147. If another type of proximity sensor is utilized for a door sensing means, other than photo sensor 49, a jumper wire is connected between terminals 149 and 151 of connector 147.
- the other types of proximity sensors may still be connected across terminals 156, 159 of connector 155, with the normally closed contacts of the proximity sensors connected to terminals 156, 159 to apply 12 volts DC to terminal 159 when not being actuated. These sensors should also be mounted to car 13 so that they will actuate when inner doors 15 are fully opened and fully closed.
- Photo sensors 45 and 49 are connected to circuit board 71 at connector 155. A plus 12 volt power connection 156 and ground connection 157 are provided. The output from photo sensor 45 (shown in Figure 1) is connected to terminal 161. The output from photo sensor 47 (shown in Figure 1) is connected to terminal 159 of connector 155, so that power will be applied to relay 145 when inner doors 15 are either fully opened or fully closed. Photo sensor 45 (shown in Figure 1) is connected to terminal 161 so that terminal 161 will be connected to ground terminal 157 when a door zone is detected.
- Circuit board 71 includes door zone detection relay 141, door zone output signal relay 143 and door limit relay 145. These relays control operation of electric solenoid 53 (shown in Figure 2) .
- photo sensor 45 detects a door zone
- terminal 161 When photo sensor 45 detects a door zone, terminal 161 will be connected to ground terminal 157, causing light emitting diode 163 to be turned on and actuating relays 141, 143. Passing power through coil 165 will actuate relay 141, switching contacts 167, 169 from the normal position (shown in Figure 4A) . Power being applied to coil 171 will actuate relay 143, moving contacts 173, 175 from the normal position (shown in Figure 4A) .
- terminal 185 In the normal position, without power being applied to relay 145, terminal 185 is connected to terminal 187 of connecter 129.
- contacts 173, 175 When power is applied to actuate relay 145, contacts 173, 175 are moved from the normal position shown in Figure 4A, opening the electrical connection between terminals 185 and 187 and closing the electrical connection between terminals 187 and 189.
- This provides an independent door zone signal, for use with main elevator control circuits, such as controls 39 and panel 40 (shown in Figure 1) .
- Both normally open and normally closed sets of terminals are provided, with 187 being a common terminal, 185 being a normally closed terminal and 189 being a normally open terminal.
- terminal 151 of connector 147 When relay 141 is actuated, by passing current through coil 165 to move contacts 167, 169 from the position shown in Figure 4A, terminal 151 of connector 147 will be connected to terminal 181 of connector 129. Terminal 181 of connector 129 is used for providing power to solenoid 53. A ground connection is provided through terminal 183 connector 129.
- a jumper wire is used to connect terminal 151 to terminal 153 of connector 147.
- contacts 193, 195 will be applying 12 volts DC to terminal 153, which is electrically connected to terminal 151 by a jumper wire. This will apply power to terminal 181 for powering the coil of electric solenoid 53 (shown in Figure 1) .
- relay 145 will remain in the actuated position (not shown) until inner doors 15 begin to open and reflective strip 51 passes in front of photo sensor 49.
- Terminal 159 is connected to the normally closed contacts of photo sensor 49, so that power will not be applied across contacts 193, 195 until doors 15 begin to open at a particular floor.
- Light emitting diode 197 is provided to indicate when relay 145 is actuated.
- Diode 199 is a surge suppression diode for coil 191.
- External LED connectors 201, 203 are provide to indicate when 12 volts power is applied to circuit board 71.
- An LED, or other output indicator when connected across terminals 201, 203 will be powered when either external power or battery power is applied to circuit board 71.
- On board LED 205 also provides an indication of whether either battery power or external power is applied to circuit board 71.
- Capacitor 207 is provided for connecting between the + 12 volt nodes and ground nodes of circuit board 71.
- controller 43 will actuate solenoid 53 to pull plunger 55 upwards and out of the path of blocking pin 59 so that doors 15 may be fully opened.
- inner doors 15 are almost fully open, reflective strip 51 will pass from in front of photo sensor 49, so that photo sensor 49 no longer passes the door data signal. This causes power to be taken off of solenoid 53, and plunger 55 falls from the retracted position back into the extended position. This will extend the service life of solenoid 53 by not continuously applying power as inner doors 15 are held open. For example, cleaning crews may freguently leave elevator doors 15, 17 open while they are cleaning a floor, taking elevator 11 out of service.
- solenoid 53 will remain in the extended position, latching elevator inner doors 15 fully closed so that they cannot be opened more than four (4) inches. Also, when switch 103 (shown in Fig. 4B) is moved to the off position so that voltage is no longer applied to node 105, from either the external power supply of wiring trough 41 or battery 69 (shown in Figure l) , plunger 55 will remain in the extended position so that blocking member 59 can not pass beneath solenoid 53 and inner doors 15 cannot be opened more than four (4) inches. A maintenance technician will have to physically remove plunger 55 or solenoid 53 from blocking inner doors 15 from opening more than four (4) inches, or return switch 103 to the on position.
- the present invention provides several advantages over prior art elevator door restrictors.
- An electronically controlled relay is provided.
- the electronically controlled relay prevents the inner doors of the elevator car from being unlatched as the elevator is passing through each floor. This provides much safer operation since the inner doors can not be pushed open as the elevator car is moving through a floor zone. This also provides much quieter operation than mechanical latching mechanisms which are unlatched at each floor.
- a door open signal is provided so that the elevator doors will be opened and remain open. A buzzer will sound a pulsed, intermittent, audible signal so that persons in the elevator car will know to evacuate the elevator and notify a service technician to repair the system.
- an independent floor zone signal is provided which may be used with the main elevator controls.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69617697T DE69617697D1 (en) | 1995-08-08 | 1996-08-08 | AUFZUGSTÜRBEGRENZER |
EP96928028A EP0844977B1 (en) | 1995-08-08 | 1996-08-08 | Elevator door restrictor |
AU67638/96A AU713408B2 (en) | 1995-08-08 | 1996-08-08 | Elevator door restrictor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/512,489 US5655627A (en) | 1995-08-08 | 1995-08-08 | Elevator door restrictor |
US08/512,489 | 1995-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997006090A1 true WO1997006090A1 (en) | 1997-02-20 |
Family
ID=24039321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/012541 WO1997006090A1 (en) | 1995-08-08 | 1996-08-08 | Elevator door restrictor |
Country Status (6)
Country | Link |
---|---|
US (2) | US5655627A (en) |
EP (1) | EP0844977B1 (en) |
AU (1) | AU713408B2 (en) |
CA (1) | CA2228811A1 (en) |
DE (1) | DE69617697D1 (en) |
WO (1) | WO1997006090A1 (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6006866A (en) * | 1995-08-08 | 1999-12-28 | Advanced Microcontrols, Inc. | Elevator door restrictor |
US5655627A (en) * | 1995-08-08 | 1997-08-12 | Advanced Microcontrols, Inc. | Elevator door restrictor |
US5964319A (en) * | 1997-06-04 | 1999-10-12 | Weingarden; Alison E. | Remote-operated elevator door safety control |
US5894911A (en) * | 1997-07-11 | 1999-04-20 | Otis Elevator Company | Car door locking system |
US5918705A (en) * | 1997-11-10 | 1999-07-06 | Friend; Jeff | Building elevator door restrictor |
JP2000203772A (en) * | 1998-08-21 | 2000-07-25 | Inventio Ag | Device for generating hoistway information of elevator equipment |
US6849377B2 (en) | 1998-09-23 | 2005-02-01 | E. I. Du Pont De Nemours And Company | Photoresists, polymers and processes for microlithography |
US6790587B1 (en) | 1999-05-04 | 2004-09-14 | E. I. Du Pont De Nemours And Company | Fluorinated polymers, photoresists and processes for microlithography |
WO2002044811A2 (en) * | 2000-11-29 | 2002-06-06 | E. I. Du Pont De Nemours And Company | Polymers blends and their use in photoresist compositions for microlithography |
TW594385B (en) * | 2001-10-26 | 2004-06-21 | Du Pont | Fluorinated polymers having ester groups useful as photoresists and processes for microlithography |
JP4245392B2 (en) * | 2003-03-27 | 2009-03-25 | 東芝エレベータ株式会社 | Elevator car door device |
US7097001B2 (en) * | 2003-11-12 | 2006-08-29 | Inventio Ag | Elevator car door movement restrictor |
ATE521563T1 (en) * | 2004-07-06 | 2011-09-15 | Otis Elevator Co | ELECTROMAGNETIC OPERATED ELEVATOR DOOR LOCK |
US8001797B2 (en) * | 2007-09-25 | 2011-08-23 | Tidrick Thomas M | Air conditioner monitor and alarm system |
KR20100102158A (en) * | 2007-12-18 | 2010-09-20 | 인벤티오 아게 | Locking system for a lift door |
US8960372B2 (en) | 2010-07-08 | 2015-02-24 | Thyssenkrupp Elevator Corporation | Elevator car door interlock |
US9837860B2 (en) * | 2014-05-05 | 2017-12-05 | Witricity Corporation | Wireless power transmission systems for elevators |
EP3322661B1 (en) * | 2015-07-13 | 2022-03-02 | Otis Elevator Company | Deterrent device inhibition key |
BR112017028193B1 (en) | 2015-07-30 | 2023-01-24 | Inventio Ag | LOCKING SYSTEM FOR LOCKING AND UNLOCKING A CABIN DOOR OF AN ELEVATOR CABIN AND ELEVATOR INSTALLATION |
KR102432822B1 (en) | 2015-08-14 | 2022-08-16 | 오티스 엘리베이터 컴파니 | door motor brake |
US10906774B1 (en) | 2020-06-03 | 2021-02-02 | Scott Akin | Apparatus for elevator and landing alignment |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004655A (en) * | 1975-08-28 | 1977-01-25 | Westinghouse Electric Corporation | Elevator system including door operator having an enclosure which forms track for door rollers |
US4436184A (en) * | 1982-05-05 | 1984-03-13 | Westinghouse Electric Corp. | Elevator system |
US5250765A (en) * | 1990-06-15 | 1993-10-05 | Mitsubishi Denki Kabushiki Kaisha | Apparatus for controlling elevator door |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2200074A (en) * | 1939-06-22 | 1940-05-07 | Westinghouse Elec Elevator Co | Elevator door operating system |
US2758676A (en) * | 1954-02-16 | 1956-08-14 | Haughton Elevator Company | Variable standing time control |
US2859835A (en) * | 1955-02-24 | 1958-11-11 | Toledo Scale Corp | Mechanism for opening and closing elevator cabs and hatchways |
US2902117A (en) * | 1958-11-25 | 1959-09-01 | Montgomery Elevator | Elevator control circuit |
US2996152A (en) * | 1960-04-06 | 1961-08-15 | Olexson George | Magnetic retractable door roller for automatic elevators |
US3285369A (en) * | 1964-04-17 | 1966-11-15 | K M White Company | Door control mechanism |
US4364454A (en) * | 1980-10-27 | 1982-12-21 | G.A.L. Manufacturing Corporation | Vehicle door lock for limiting door opening to specified vehicle positions |
US4529065A (en) * | 1983-10-21 | 1985-07-16 | Westinghouse Electric Corp. | Elevator system |
US5655627A (en) * | 1995-08-08 | 1997-08-12 | Advanced Microcontrols, Inc. | Elevator door restrictor |
-
1995
- 1995-08-08 US US08/512,489 patent/US5655627A/en not_active Expired - Lifetime
-
1996
- 1996-08-08 DE DE69617697T patent/DE69617697D1/en not_active Expired - Lifetime
- 1996-08-08 CA CA002228811A patent/CA2228811A1/en not_active Abandoned
- 1996-08-08 EP EP96928028A patent/EP0844977B1/en not_active Expired - Lifetime
- 1996-08-08 WO PCT/US1996/012541 patent/WO1997006090A1/en active IP Right Grant
- 1996-08-08 AU AU67638/96A patent/AU713408B2/en not_active Ceased
-
1997
- 1997-08-08 US US08/907,554 patent/US5896953A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004655A (en) * | 1975-08-28 | 1977-01-25 | Westinghouse Electric Corporation | Elevator system including door operator having an enclosure which forms track for door rollers |
US4436184A (en) * | 1982-05-05 | 1984-03-13 | Westinghouse Electric Corp. | Elevator system |
US5250765A (en) * | 1990-06-15 | 1993-10-05 | Mitsubishi Denki Kabushiki Kaisha | Apparatus for controlling elevator door |
Non-Patent Citations (2)
Title |
---|
ANSI/ASME A17.1-1981, "Safety Code for Elevators and Escalator", Section 211, pages 70-71. * |
See also references of EP0844977A4 * |
Also Published As
Publication number | Publication date |
---|---|
US5896953A (en) | 1999-04-27 |
AU713408B2 (en) | 1999-12-02 |
CA2228811A1 (en) | 1997-02-20 |
US5655627A (en) | 1997-08-12 |
DE69617697D1 (en) | 2002-01-17 |
EP0844977A4 (en) | 1998-06-03 |
AU6763896A (en) | 1997-03-05 |
EP0844977A1 (en) | 1998-06-03 |
EP0844977B1 (en) | 2001-12-05 |
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