US3912049A - Interlock for center opening doors - Google Patents

Interlock for center opening doors Download PDF

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Publication number
US3912049A
US3912049A US410201A US41020173A US3912049A US 3912049 A US3912049 A US 3912049A US 410201 A US410201 A US 410201A US 41020173 A US41020173 A US 41020173A US 3912049 A US3912049 A US 3912049A
Authority
US
United States
Prior art keywords
interlock
door
doors
movable member
lever
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
US410201A
Other languages
English (en)
Inventor
Gordon A Holland
Gilbert T Adams
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.)
Delaware Capital Formation Inc
Original Assignee
Dover Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dover Corp filed Critical Dover Corp
Priority to US410201A priority Critical patent/US3912049A/en
Priority to CA208,078A priority patent/CA996584A/en
Priority to NL7411720A priority patent/NL7411720A/xx
Priority to AU73148/74A priority patent/AU7314874A/en
Priority to GB40613/74A priority patent/GB1485964A/en
Priority to ES430335A priority patent/ES430335A1/es
Priority to IT53442/74A priority patent/IT1021742B/it
Priority to DE19742449110 priority patent/DE2449110A1/de
Priority to FR7435477A priority patent/FR2249229A1/fr
Priority to LU71171A priority patent/LU71171A1/xx
Priority to NO743860A priority patent/NO743860L/no
Priority to DK560574A priority patent/DK560574A/da
Priority to BE2053936A priority patent/BE821453A/xx
Priority to SE7413453A priority patent/SE7413453L/
Application granted granted Critical
Publication of US3912049A publication Critical patent/US3912049A/en
Assigned to DELAWARE CAPITAL FORMATION, INC. reassignment DELAWARE CAPITAL FORMATION, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DOVER CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B66B13/12—Arrangements for effecting simultaneous opening or closing of cage and landing doors

Definitions

  • An interlock for center opening elevator hoistway doors in which one door is powered and the other door is operated by a cable from the powered door, has an interlock switch operated by the powered door to prevent the elevator car from leaving the landing before the hoistway doors are closed.
  • a tab connected to a spring loaded pivoted lever swings into a position underlying the interlock to prevent the interlock hook from dropping into position to close the interlock switch.
  • a cam mounted on the idle door engages a cam follower on the lever and rotates the lever tab clear of the interlock hook, simultaneously swinging a latch connected to the lever into a catch mounted on the cam so that the idle door is securely locked in closed position once the interlock hook drops into position to lock the powered door.
  • This invention relates to door interlocks, and especially to an interlock for center opening elevator hoistway doors.
  • one arrangement for operating the hoistway doors is by means of vanes carried by each panel of the car door.
  • the car door vanes engage rollers on the two hatchway door panels to unlock and power each panel of the hatchway door independently.
  • Each panel of the hatchway door is therefore a powered panel, and each is supplied with its own interlock.
  • Another more common practice is to operate one of the hoistway doors by engagement of the motor driven elevator car door with one of the hoistway doors.
  • the other, or idle hoistway door is operated by means of a linkage between the powered hoistway door and the idle hoistway door.
  • One particularly effective manner of relating the two hoistway doors is by means of a cable trained around a pair of pulleys on opposite sides of the hoistway door opening.
  • the powered hoistway door connected to the cable, drives the cable; the idle hoistway door, likewise connected to the cable, is operated by the cable.
  • the powered hoistway door is provided with an interlock lever-arm, which includes a hook and a switch shorting bar.
  • the hoistway door operating mechanism on the car door lifts the interlock arm which opens the interlock switch and then disengages the interlock hook from its catch. Unlatched, the hoistway door can be opened and the open switch prevents the elevator car from moving until the interlock is closed.
  • the elevator car door closes it simultaneously closes the hoistway doors, whereupon the hoistway door operating mechanism on the car door disengages from the hoistway door to latch the interlock hook and close the interlock switch.
  • the hoistway doors are thus locked and prevented from opening and the car is enabled to leave the landing.
  • Another object of this invention is to provide a true interlock device for both doors with the addition of only a few simple, rugged and reliable parts and without increasing the number of electrical contacts.
  • a further object of this invention is to provide an interlock system for center opening elevator doors which will allow the elevator to continue to give service to all landings in a building in spite of a failure in the relating device, without compromising the safety of the interlock system.
  • position responsive means including a lever operated by the idle door and swingable between a position in which it blocks the closing of the interlock hook and a position in which it permits the closing of the interlock hook and simultaneously engages a catch on the idle door to prevent the idle door from opening when the interlock hook is engaged.
  • FIG. 1 is an elevation of the interlock and supporting mechanisms for a pair of center opening hoistway doors
  • FIG. 2 is a plan view along lines '22 in FIG. 1;
  • FIG. 3 is an elevation showing the idle door in open position and the powered door in closed position but with the interlock hook arm held in raised or open position;
  • FIG. 4 is a plan view along lines 44 in FIG. 3;
  • FIG. 5 is a plan view similar to FIG. 4 but with the idle door closed and latched and the cable relating device operating normally;
  • FIG. 6 is an elevation along lines 66 in FIG. 5;
  • FIG. 7 is a plan view similar to FIG. 5, but with the cable relating device failed.
  • FIG. 8 is an elevation along lines 88 in FIG. 7.
  • FIG. 1 a portion of a center opening elevator hoistway door arrangement is shown having a hanger track 10, supported by the building walls, extending laterally across the top of the hoistway opening.
  • a pair of hoistway doors is supported for horizontal movement along the hanger track 10 by a truck including two spaced hanger assemblies l2e and 120, connected by a horizontal brace 14.
  • Each hanger assembly includes a wheel or roller 16 which rolls on the hanger track 10, by means of which the hoistway doors are supported for horizontal movement transversely of the door opening.
  • a pulley (not shown) is connected to each end of the hanger track 10 and a cable 20 is trained around both pulleys and extends across the top of the hoistway door opening.
  • a clamp 22 secured to each of the horizontal braces 14 connects the cable 20 to each of the hoistway doors.
  • two rollers 24 and 26 are pivotally connected to a bell crank 28, which, in turn, is pivotally connected to one of the two hoistway doors, hereinafter referred to as the powered door 30.
  • the elevator car door 34 carries a pair of door operating vanes 32 which extend vertically on both sides of the rollers 24 and 26 when the elevator car is aligned with a hositway entrance.
  • the door operating vanes 32 close on the rollers 24 and 26 to rotate the bell crank 28, shown in FIG. 1, in a counterclockwise direc tion.
  • a rod 36 extends from the bell crank 28 to an operating arm 38 of an interlock lever 40 pivotally mounted on the center hanger assembly 120 supporting the powered hoistway door 30.
  • the other arm 41 of the interlock lever 40 engages and operates an interlock catch and switch assembly 42, fastened centrally to the hanger track 10.
  • An interlock switch 44 is wired to the elevator control mechanism in such a way that if any interlock switch at any floor in the system is open, the elevator car drive mechanism cannot operate. In other words, before the elevator hoist machine can be activated, the interlock switch 44 at each floor in the system must be closed.
  • the book arm 41 of the interlock lever 40 includes a switch shorting bar 46 which completes the electrical circuit of the switch 44 when the interlock lever is in its closed and locked position.
  • the idle door 30a it is desirable to have some means associated with the other hoistway door, hereinafter referred to as the idle door 30a, to prevent its opening should the cable 20 lose control of the idle door 30a, as would happen-if the cable broke, became distrained from the pulleys, or if either of the clamps 22 between the hoistway doors and the cable failed in some manner.
  • a locking lever 52 is pivotally mounted on the hanger track above the interlock catch and switch assembly 42.
  • the locking lever 52 and the hook arm 41 will latch the idle door in closed position when the interlock is closed, and will allow unlatching of the idle door only when the interlock switch 44 is open. This device ensures that neither hoistway door can open until the elevator car is at the landing, and ensures that the elevator car cannot leave the landing until both hoistway doors are securely latched shut.
  • the locking lever 52 is shown mounted on a pintle 54 which, in turn, is welded to a plate 56 bolted to the hanger track 10 under the interlock catch and switch assembly 42.
  • a cam follower 58 is mounted on the locking lever 52 near one end.
  • the cam follower includes a roller 60 rotatably mounted on a roller pintle 62 welded to a leaf 64 projecting forwardly from the locking lever 52 and overhanging the interlock catch and switch assembly.
  • the extreme end of the locking lever 52 adjacent the cam follower is bent forwardly normal to the locking lever 52 to provide a latch 66 for the idle hoistway door.
  • a latch plate 68 is fastened to the upper portion of the center hanger assembly 12c of the idle door.
  • the latch plate 68 is a short length of angle iron having, in its vertical side, a rectangular opening 70 which is horizontally aligned with the latch 66 on the locking lever 52.
  • a cam face 72 is formed on the horizontal side of the latch plate 68 extending diagonally from the vertical side forwardly and to the right as shown in FIG. 4. When the idle door closes toward the center (to the left as shown in FIGS. 3 and 4) the cam face 72 engages the roller 60 pivotally mounted on the locking lever 52 and pivots the locking lever 52 clockwise, in FIG. 4, about the locking lever pintle 54.
  • the latch 66 enters the opening 70 in the vertical side of the latch plate 68, thereby securing the idle door against opening until the locking lever 52 is again pivoted counterclockwise to disengage the latch 66 from the opening 70.
  • FIGS. 7 and 8 assume that the cable relating device has failed in some way and someone in the hall is exerting an opening force on the idle hoistway door 30a.
  • the idle hoistway door 30a cannot open with the latch 66 engaged in the opening 70 in the latch plate 68, and, as shown in FIG. 4, the locking lever 52 must pivot to its full counterclockwise position to disengage the latch 66 from the opening 70 in the latch plate 68.
  • the locking lever 52 is prevented from pivoting counterclockwise to unlatch the idle door when the hook arm 41 is in latching position, by a tab 76 on a rocker arm 74 which depends from the left arm of the locking lever 52.
  • the rocker arm 74 extends down behind the interlock hook arm 41 and the tab 76 projects forwardly from the lower end of the rocker arm 74, against the interlock hook arm 41 when the interlock is in closed position.
  • the hook arm 41 must be raised, opening the interlock switch 44 and disengaging the interlock hook 48 from the catch 50.
  • a spring 78 secured to the left arm of the locking lever 52 swings the locking lever 52 counterclockwise about its pintle 54, withdrawing the latch 66 from the opening 70 in the latch plate 68 to unlatch the idle door.
  • the locking lever 52 When the cable relating device or the idle door jams so that it cannot close, the locking lever 52 remains in its extreme counterclockwise position and the tab 76 remains extending under the hook arm 41. In this condition, the hook arm 41 cannot drop so the switch 44 remains open and the elevator car is prevented from leaving the landing. If it is possible to free the jam, the idle door will close under its spring or gravity closer, whereupon the interlock will close normally, securely locking both hoistway doors and permitting the elevator to continue operating in full safety. The car will continue to serve all floors in the building, including the floor where the relating cable has failed. At this floor, only the powered door will open automatically although the idle door can be opened manually.
  • the elevator car operating mechanism can be energized only when both hoistway doors are safely latched, and neither hoistway door can be opened until the elevator car has arrived at its landing.
  • This invention accomplishes an improved and more positive, direct interlock of both door panels, yet retaining substantially the same economy and simplicity of the original cable relating center opening door operating mechanism. It also functions more reliably than the independently operated center opening doors, while providing all the safety features thereof.
  • a catch could be added to the idle door and the hook arm 41 could be elongated and provided with a second hook to engage the catch on the idle door.
  • the function of the latch 66 would then be performed by the elongated hook arm and the latch 66 could be dispensed with.
  • Other modifications and variations of the disclosed embodiment of this invention are also possible and it is expressly to be understood that the invention may be practiced otherwise than as specifically shown while remaining within the spirit and scope of the appended claims.
  • a center-opening door system having a powered door; an idle door operated by the powered door; an interlock hook for latching the powered door; and a switch operated by the interlock hook, the improvement comprising:
  • a movable member having formed thereon a tab and a latch
  • a cam follower operatively connected to said movable member
  • a cam connected to said idle door and aligned with said cam follower for moving said movable member in one direction;
  • said movable member being movable between a first position in which said tab occupies a position blocking movement of said interlock hook to the latching position thereof, and in which said latch is clear of said catch; and a second position in which said tab is clear of the path of travel of said interlock hook, and in which said latch extends into said catch.
  • said movable member moving means comprises biasing means urging said movable member to move in said other direction.
  • position responsive means operable as a function of at least the position of the other door to prevent the interlock hook from closing the interlock switch unless both of said doors are closed and latched by said latching means.
US410201A 1973-10-26 1973-10-26 Interlock for center opening doors Expired - Lifetime US3912049A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US410201A US3912049A (en) 1973-10-26 1973-10-26 Interlock for center opening doors
CA208,078A CA996584A (en) 1973-10-26 1974-08-29 Interlock for center opening doors
NL7411720A NL7411720A (nl) 1973-10-26 1974-09-04 Blokkeringsinrichting voor twee, vanuit het midden opengaande, schuifdeuren van een lift- schacht.
AU73148/74A AU7314874A (en) 1973-10-26 1974-09-10 Doors
GB40613/74A GB1485964A (en) 1973-10-26 1974-09-18 Interlock for centre opening doors
ES430335A ES430335A1 (es) 1973-10-26 1974-09-24 Perfeccionamientos introducidos en un sistema de puertas deapertura central.
IT53442/74A IT1021742B (it) 1973-10-26 1974-10-09 Perfezionamento nei dispositivi di interblocco di piano per ascensori
DE19742449110 DE2449110A1 (de) 1973-10-26 1974-10-15 Verriegelungsvorrichtung fuer tueranlagen, insbesondere fuer aufzug-fahrschachttueren
FR7435477A FR2249229A1 ( ) 1973-10-26 1974-10-22
LU71171A LU71171A1 ( ) 1973-10-26 1974-10-24
NO743860A NO743860L ( ) 1973-10-26 1974-10-25
DK560574A DK560574A ( ) 1973-10-26 1974-10-25
BE2053936A BE821453A (fr) 1973-10-26 1974-10-25 Dispositif de securite de verrouillage mutuel de deux elements de porte a ouverture centrale
SE7413453A SE7413453L ( ) 1973-10-26 1974-10-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US410201A US3912049A (en) 1973-10-26 1973-10-26 Interlock for center opening doors

Publications (1)

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US3912049A true US3912049A (en) 1975-10-14

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US410201A Expired - Lifetime US3912049A (en) 1973-10-26 1973-10-26 Interlock for center opening doors

Country Status (14)

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US (1) US3912049A ( )
AU (1) AU7314874A ( )
BE (1) BE821453A ( )
CA (1) CA996584A ( )
DE (1) DE2449110A1 ( )
DK (1) DK560574A ( )
ES (1) ES430335A1 ( )
FR (1) FR2249229A1 ( )
GB (1) GB1485964A ( )
IT (1) IT1021742B ( )
LU (1) LU71171A1 ( )
NL (1) NL7411720A ( )
NO (1) NO743860L ( )
SE (1) SE7413453L ( )

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313525A (en) * 1980-06-05 1982-02-02 Montgomery Elevator Company Car door safety interlock
US4364454A (en) * 1980-10-27 1982-12-21 G.A.L. Manufacturing Corporation Vehicle door lock for limiting door opening to specified vehicle positions
US4934488A (en) * 1987-07-18 1990-06-19 Mitsubishi Denki Kabushiki Kaisha Door lock for an elevator car
EP0484171A2 (en) * 1990-10-31 1992-05-06 Otis Elevator Company Elevator door system
US5636715A (en) * 1994-03-10 1997-06-10 Mitsubishi Denki Kabushiki Kaisha Elevator door structure and method of adjusting the same
US5730254A (en) * 1995-07-21 1998-03-24 Vertisys, Inc. Elevator door restraint device
US5836424A (en) * 1995-04-18 1998-11-17 Allen; Thomas H. Multiple level building with elevator hoistway seal structure
US5899302A (en) * 1997-05-16 1999-05-04 Vertisys, Inc. Elevator door interlock
US6173815B1 (en) * 1997-02-28 2001-01-16 Kone Corporation Door coupler and locking device
US6330763B1 (en) 1999-09-10 2001-12-18 Rite-Hite Holding Corporation Translating door with disengageable seals
US6352097B1 (en) 1999-09-10 2002-03-05 Rite-Hite Holding Corporation Multi-panel door with an auxiliary drive mechanism
US6360487B1 (en) 1999-09-10 2002-03-26 Rite-Hite Holding Corporation Resilient door panel
US20060225966A1 (en) * 2003-09-17 2006-10-12 Inventio Ag Device for Connecting a Car Door with a Shaft Door and for Locking and Unlocking the Doors, a Device for Emergency Unlocking of a Car Door and a Method for Emergency Unlocking of a Car Door
US7757437B2 (en) 2004-01-09 2010-07-20 Rite-Hite Holding Corporation Resilient retention system for a door panel
US8167020B2 (en) 2009-03-02 2012-05-01 Rite-Hite Holding Corporation Upper seal for a horizontal side-moving door
US8733024B2 (en) 2005-10-28 2014-05-27 Jamison Door Company Flexible door with rigid insulation
CN108616211A (zh) * 2018-05-30 2018-10-02 西安中车永电电气有限公司 一种用于变流柜带有互锁功能的柜门
CN109650233A (zh) * 2018-12-28 2019-04-19 住友富士电梯有限公司 一种电梯厅门误开门防坠装置及电梯
US10544010B2 (en) * 2017-09-21 2020-01-28 G.A.L. Manufacturing Company, Llc Method and system for elevator door locking and detection of elevator door locking state
US11085230B2 (en) 2016-02-03 2021-08-10 Rite-Hite Holding Corporation Insulated doors with restorable breakaway sections
US11299373B2 (en) * 2017-05-16 2022-04-12 Wittur Holding Gmbh Blocking assembly, elevator system
US11390492B2 (en) 2018-05-01 2022-07-19 Otis Elevator Company Method and assembly for positioning an elevator door interlock
US11772937B2 (en) 2022-02-25 2023-10-03 G.A.L. Manufacturing Company, Llc Elevator car door control system
WO2024074868A1 (en) * 2022-10-05 2024-04-11 Wittur Holding Gmbh A guide assembly for use in elevator doors

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357998A (en) * 1980-02-11 1982-11-09 Otis Elevator Company Between landing car door safety lock
GB8902566D0 (en) * 1989-02-06 1989-03-22 Rotalac Plastics Bi-parting shutter system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1823962A (en) * 1930-08-16 1931-09-22 Cons Steel Corp Elevator door operator
US2517713A (en) * 1947-09-27 1950-08-08 Westinghouse Electric Corp Elevator door system
US2659457A (en) * 1950-07-28 1953-11-17 Peelle Co The Latch for counterbalanced elevator doors
US2936046A (en) * 1957-10-24 1960-05-10 Jr James M Jecmen Freight elevator door latch
US3065826A (en) * 1958-07-30 1962-11-27 Otis Elevator Co Entranceway apparatus and closure means for elevators
US3315767A (en) * 1964-11-12 1967-04-25 Armor Elevator Company Inc Sliding elevator and hatchway door operator
US3605952A (en) * 1969-09-30 1971-09-20 Otis Elevator Co Door coupling apparatus for elevator systems

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1823962A (en) * 1930-08-16 1931-09-22 Cons Steel Corp Elevator door operator
US2517713A (en) * 1947-09-27 1950-08-08 Westinghouse Electric Corp Elevator door system
US2659457A (en) * 1950-07-28 1953-11-17 Peelle Co The Latch for counterbalanced elevator doors
US2936046A (en) * 1957-10-24 1960-05-10 Jr James M Jecmen Freight elevator door latch
US3065826A (en) * 1958-07-30 1962-11-27 Otis Elevator Co Entranceway apparatus and closure means for elevators
US3315767A (en) * 1964-11-12 1967-04-25 Armor Elevator Company Inc Sliding elevator and hatchway door operator
US3605952A (en) * 1969-09-30 1971-09-20 Otis Elevator Co Door coupling apparatus for elevator systems

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313525A (en) * 1980-06-05 1982-02-02 Montgomery Elevator Company Car door safety interlock
US4364454A (en) * 1980-10-27 1982-12-21 G.A.L. Manufacturing Corporation Vehicle door lock for limiting door opening to specified vehicle positions
US4934488A (en) * 1987-07-18 1990-06-19 Mitsubishi Denki Kabushiki Kaisha Door lock for an elevator car
EP0484171A2 (en) * 1990-10-31 1992-05-06 Otis Elevator Company Elevator door system
EP0484171A3 (en) * 1990-10-31 1993-05-26 Otis Elevator Company Elevator door system
US5636715A (en) * 1994-03-10 1997-06-10 Mitsubishi Denki Kabushiki Kaisha Elevator door structure and method of adjusting the same
US5836424A (en) * 1995-04-18 1998-11-17 Allen; Thomas H. Multiple level building with elevator hoistway seal structure
US5899303A (en) * 1995-04-18 1999-05-04 Allen; Thomas H. Hoistway door seal structure
US5730254A (en) * 1995-07-21 1998-03-24 Vertisys, Inc. Elevator door restraint device
US6173815B1 (en) * 1997-02-28 2001-01-16 Kone Corporation Door coupler and locking device
US5899302A (en) * 1997-05-16 1999-05-04 Vertisys, Inc. Elevator door interlock
US6923238B2 (en) 1999-09-10 2005-08-02 Rite-Hite Holding Corporation Multi-panel door with an auxiliary drive mechanism
US6360487B1 (en) 1999-09-10 2002-03-26 Rite-Hite Holding Corporation Resilient door panel
US6330763B1 (en) 1999-09-10 2001-12-18 Rite-Hite Holding Corporation Translating door with disengageable seals
US6352097B1 (en) 1999-09-10 2002-03-05 Rite-Hite Holding Corporation Multi-panel door with an auxiliary drive mechanism
US20060225966A1 (en) * 2003-09-17 2006-10-12 Inventio Ag Device for Connecting a Car Door with a Shaft Door and for Locking and Unlocking the Doors, a Device for Emergency Unlocking of a Car Door and a Method for Emergency Unlocking of a Car Door
US7370731B2 (en) * 2003-09-17 2008-05-13 Inventio Ag Device for connecting a car door with a shaft door and for locking and unlocking the doors, a device for emergency unlocking of a car door and a method for emergency unlocking of a car door
US7757437B2 (en) 2004-01-09 2010-07-20 Rite-Hite Holding Corporation Resilient retention system for a door panel
US8733024B2 (en) 2005-10-28 2014-05-27 Jamison Door Company Flexible door with rigid insulation
US8167020B2 (en) 2009-03-02 2012-05-01 Rite-Hite Holding Corporation Upper seal for a horizontal side-moving door
US11085230B2 (en) 2016-02-03 2021-08-10 Rite-Hite Holding Corporation Insulated doors with restorable breakaway sections
US11299373B2 (en) * 2017-05-16 2022-04-12 Wittur Holding Gmbh Blocking assembly, elevator system
US10544010B2 (en) * 2017-09-21 2020-01-28 G.A.L. Manufacturing Company, Llc Method and system for elevator door locking and detection of elevator door locking state
US11390492B2 (en) 2018-05-01 2022-07-19 Otis Elevator Company Method and assembly for positioning an elevator door interlock
CN108616211A (zh) * 2018-05-30 2018-10-02 西安中车永电电气有限公司 一种用于变流柜带有互锁功能的柜门
CN109650233A (zh) * 2018-12-28 2019-04-19 住友富士电梯有限公司 一种电梯厅门误开门防坠装置及电梯
US11772937B2 (en) 2022-02-25 2023-10-03 G.A.L. Manufacturing Company, Llc Elevator car door control system
WO2024074868A1 (en) * 2022-10-05 2024-04-11 Wittur Holding Gmbh A guide assembly for use in elevator doors

Also Published As

Publication number Publication date
IT1021742B (it) 1978-02-20
LU71171A1 ( ) 1975-06-24
FR2249229A1 ( ) 1975-05-23
GB1485964A (en) 1977-09-14
ES430335A1 (es) 1976-09-16
DE2449110A1 (de) 1975-04-30
DK560574A ( ) 1975-06-16
BE821453A (fr) 1975-04-25
CA996584A (en) 1976-09-07
NO743860L ( ) 1975-05-26
AU7314874A (en) 1976-03-18
NL7411720A (nl) 1975-04-29
SE7413453L ( ) 1975-04-28

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