GB2202967B - Door operation - Google Patents

Door operation

Info

Publication number
GB2202967B
GB2202967B GB8718672A GB8718672A GB2202967B GB 2202967 B GB2202967 B GB 2202967B GB 8718672 A GB8718672 A GB 8718672A GB 8718672 A GB8718672 A GB 8718672A GB 2202967 B GB2202967 B GB 2202967B
Authority
GB
United Kingdom
Prior art keywords
doors
coupled
band
endless
door operation
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
GB8718672A
Other versions
GB8718672D0 (en
GB2202967A (en
Inventor
Michael John Wilkins
John Durrant
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
Westinghouse Brake and Signal Holdings Ltd
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 Westinghouse Brake and Signal Co Ltd, Westinghouse Brake and Signal Holdings Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Publication of GB8718672D0 publication Critical patent/GB8718672D0/en
Publication of GB2202967A publication Critical patent/GB2202967A/en
Application granted granted Critical
Publication of GB2202967B publication Critical patent/GB2202967B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/21—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device
    • G05B19/23—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device for point-to-point control
    • G05B19/231—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device for point-to-point control the positional error is used to control continuously the servomotor according to its magnitude
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/632—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings
    • E05F15/643—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by flexible elongated pulling elements, e.g. belts, chains or cables
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/41—Detection by monitoring transmitted force or torque; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/218—Holders
    • E05Y2201/22—Locks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/23—Actuation thereof
    • E05Y2201/244—Actuation thereof by manual operation
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • E05Y2400/30—Electronic control of motors
    • E05Y2400/31—Force or torque control
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • E05Y2400/52—Safety arrangements associated with the wing motor
    • E05Y2400/53—Wing impact prevention or reduction
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • E05Y2400/52—Safety arrangements associated with the wing motor
    • E05Y2400/53—Wing impact prevention or reduction
    • E05Y2400/54—Obstruction or resistance detection
    • E05Y2400/55—Obstruction or resistance detection by using load sensors
    • E05Y2400/554—Obstruction or resistance detection by using load sensors sensing motor load
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34215—Microprocessor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/35—Nc in input of data, input till input file format
    • G05B2219/35585—Motion command profile
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/41—Servomotor, servo controller till figures
    • G05B2219/41206—Lookup table, memory with certain relationships
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42237—Pwm pulse width modulation, pulse to position modulation ppm
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42323—Detect wire break, short circuit of feedback
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42329—Defective measurement, sensor failure
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45242—Door, panel, window operation, opening, closing
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49162—On collision, obstruction reverse drive, accelerate, cancel inertia
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50198—Emergency stop

Landscapes

  • Engineering & Computer Science (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)

Abstract

A door assembly comprises two doors (1, 2) coupled to carriages (3, 4) which run on a track (6) and which are coupled to respective runs of an endless belt (12). The doors are moved towards and away from one another by driving the endless band. To this end a drive wheel (23 or 21) engaged with the endless band is driven by a prime mover (29) via a simple band and sprocket wheel drive arrangement (31/28). <IMAGE>
GB8718672A 1987-02-16 1987-08-06 Door operation Expired - Lifetime GB2202967B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8703559A GB8703559D0 (en) 1987-02-16 1987-02-16 Operating door/brake

Publications (3)

Publication Number Publication Date
GB8718672D0 GB8718672D0 (en) 1987-09-09
GB2202967A GB2202967A (en) 1988-10-05
GB2202967B true GB2202967B (en) 1991-01-23

Family

ID=10612391

Family Applications (4)

Application Number Title Priority Date Filing Date
GB8703559A Pending GB8703559D0 (en) 1987-02-16 1987-02-16 Operating door/brake
GB8716940A Withdrawn GB2201192A (en) 1987-02-16 1987-07-17 Sliding door drive
GB8718672A Expired - Lifetime GB2202967B (en) 1987-02-16 1987-08-06 Door operation
GB8719431A Pending GB2203262A (en) 1987-02-16 1987-08-17 Door control system

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB8703559A Pending GB8703559D0 (en) 1987-02-16 1987-02-16 Operating door/brake
GB8716940A Withdrawn GB2201192A (en) 1987-02-16 1987-07-17 Sliding door drive

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB8719431A Pending GB2203262A (en) 1987-02-16 1987-08-17 Door control system

Country Status (1)

Country Link
GB (4) GB8703559D0 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934600A1 (en) * 1989-10-17 1991-05-02 Hans Gugu Power operated sliding gate - has motor which drives pinion which engages toothed belt attached to gate
FR2653157A1 (en) * 1989-10-17 1991-04-19 Lantz Marcel Door with sideways movement having articulated panels, with electrical operation
DE3935173C2 (en) * 1989-10-21 1997-02-06 Geze Gmbh & Co Method for controlling an electromechanical drive of a door or the like. Control device and electromechanical drive device
LU87617A1 (en) * 1989-11-03 1991-07-22 Wurth Paul Sa LEVEL PROBE FOR TANK OVEN
DE3940762A1 (en) * 1989-12-09 1991-06-13 Hein Gmbh Christian SLIDING DOOR
DE4206272A1 (en) * 1992-02-28 1993-09-02 Siemens Ag OPERATING STARTING METHOD AND OPERATING DEVICE FOR A CONTROLLED AND / OR CONTROLLED SLIDING DOOR
DE4312608A1 (en) * 1993-04-19 1994-10-20 Abb Patent Gmbh Electronic blind control for the control of electrically driven blinds, roller shutters, awnings, curtains, garage doors and similar devices
US5350986A (en) * 1993-05-20 1994-09-27 General Motors Corp. Vehicle power door speed control
AU720231B2 (en) * 1993-07-19 2000-05-25 Dorma Gmbh & Co. Kg Process for operating a revolving door drive
DE4337828C2 (en) * 1993-11-05 1996-02-29 Dorma Gmbh & Co Kg Method and device for regulating and / or controlling a door
DE9320189U1 (en) * 1993-12-31 1994-12-22 Landert Motoren Ag Automatic protective door drive MMP / MEP
GB2325491B (en) * 1996-03-01 2000-08-30 Geze Gmbh & Co Sliding door apparatus
PL182086B1 (en) 1996-03-01 2001-11-30 Geze Gmbh Door sliding apparatus
FR2757205B1 (en) * 1996-12-13 1999-02-05 Adronit Verwaltungs Gmbh Co SLIDING DOOR FOR BODY INPUTS
DK173772B1 (en) * 1997-02-20 2001-09-24 Vkr Holding As Microprocessor controlled operator unit for electrically maneuverable devices
DK173956B1 (en) * 1997-02-20 2002-03-11 Vkr Holding As Control system for electrically maneuverable devices and operator unit for use in such a system
DK17897A (en) * 1997-02-20 1998-08-21 Rasmussen Kann Ind As Microprocessor controlled operator unit with power consumption limitation for electrically maneuverable devices
GB2378220B (en) * 1998-08-20 2003-04-23 Bruce Stanley Gunton Aperture closures
DE60027786D1 (en) * 2000-05-19 2006-06-08 Faiveley Espanola OPERATING MECHANISM FOR SLIDING DOORS
GB0406359D0 (en) 2004-03-20 2004-04-21 Gunton Bruce S Drive arrangement
FR2967192B1 (en) * 2010-11-05 2014-03-14 Compliss DEVICE FOR DRIVING A MOTORIZED CLOSURE DEVICE
US11624230B2 (en) 2017-10-24 2023-04-11 Assa Abloy Ab Roller shutter for securing a physical space within a vehicle
CN112188989B (en) * 2018-05-22 2023-03-14 三菱电机株式会社 Elevator car door device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1502676A (en) * 1974-05-02 1978-03-01 Ibm Stepping motor control system
GB1523287A (en) * 1974-10-10 1978-08-31 Papst Motoren Kg Incrementally controllable motor drive
GB1549019A (en) * 1975-06-30 1979-08-01 Ibm Step motor control systems
GB1597136A (en) * 1976-10-13 1981-09-03 Dana Corp Stepping motor control system
GB2127894A (en) * 1982-09-22 1984-04-18 Webasto Werk Baier Kg W Closure assembly position control
GB2156102A (en) * 1984-03-19 1985-10-02 Westinghouse Electric Corp Stepper motor door control apparatus and method
GB2169107A (en) * 1984-12-29 1986-07-02 Yoshida Kogyo Kk Control system for an automatic door

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB490170A (en) * 1937-09-10 1938-08-10 William Rushton Black Improvements in mechanism for operating doors of vehicles
FR2336714A1 (en) * 1975-12-27 1977-07-22 Canon Kk REPROGRAPHY MACHINE
US4328540A (en) * 1979-02-23 1982-05-04 Hitachi, Ltd. Door operation control apparatus
US4299308A (en) * 1979-12-27 1981-11-10 Otis Elevator Company Position controlled elevator door motion
GB2071203B (en) * 1980-03-12 1984-06-06 Express Lift Co Ltd Driving mechanism for lift doors
GB2088090B (en) * 1980-11-11 1984-08-01 English Clays Lovering Pochin An arrangement and a method for directing a jet of fluid
DE3340557A1 (en) * 1983-11-09 1985-05-15 Landert-Motoren-AG, Bülach, Zürich DEVICE FOR THE AUTOMATIC OPENING AND CLOSING OF SLIDING DOORS
CH663608A5 (en) * 1984-05-28 1987-12-31 Inventio Ag DOOR DRIVE WITH CLAMPING SAFETY FOR DOORS OF ELEVATOR CABINS.
US4831509A (en) * 1986-04-16 1989-05-16 Byrne & Davidson Doors (N.S.W.)Pty. Limited Door operation control apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1502676A (en) * 1974-05-02 1978-03-01 Ibm Stepping motor control system
GB1523287A (en) * 1974-10-10 1978-08-31 Papst Motoren Kg Incrementally controllable motor drive
GB1549019A (en) * 1975-06-30 1979-08-01 Ibm Step motor control systems
GB1597136A (en) * 1976-10-13 1981-09-03 Dana Corp Stepping motor control system
GB2127894A (en) * 1982-09-22 1984-04-18 Webasto Werk Baier Kg W Closure assembly position control
GB2156102A (en) * 1984-03-19 1985-10-02 Westinghouse Electric Corp Stepper motor door control apparatus and method
GB2169107A (en) * 1984-12-29 1986-07-02 Yoshida Kogyo Kk Control system for an automatic door

Also Published As

Publication number Publication date
GB8719431D0 (en) 1987-09-23
GB8703559D0 (en) 1987-03-25
GB8716940D0 (en) 1987-08-26
GB2201192A (en) 1988-08-24
GB2203262A (en) 1988-10-12
GB8718672D0 (en) 1987-09-09
GB2202967A (en) 1988-10-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960806