US3372599A - Electrically driven displacing mechanism - Google Patents

Electrically driven displacing mechanism Download PDF

Info

Publication number
US3372599A
US3372599A US519547A US51954766A US3372599A US 3372599 A US3372599 A US 3372599A US 519547 A US519547 A US 519547A US 51954766 A US51954766 A US 51954766A US 3372599 A US3372599 A US 3372599A
Authority
US
United States
Prior art keywords
rail
web
curtain
conveying
switch
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
US519547A
Other languages
English (en)
Inventor
Bratschi Konrad
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3372599A publication Critical patent/US3372599A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H1/00—Curtain suspension devices
    • A47H1/04—Curtain rails
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H5/00—Devices for drawing draperies, curtains, or the like
    • A47H5/02—Devices for opening and closing curtains
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H5/00—Devices for drawing draperies, curtains, or the like
    • A47H5/02—Devices for opening and closing curtains
    • A47H5/032—Devices with guiding means and draw cords
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H5/00—Devices for drawing draperies, curtains, or the like
    • A47H5/02—Devices for opening and closing curtains
    • A47H5/032—Devices with guiding means and draw cords
    • A47H5/0325—Devices with guiding means and draw cords using electrical or electronical drive, detecting or controlling means
    • 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
    • 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
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/43—Motors
    • E05Y2201/434—Electromotors; Details thereof
    • E05Y2201/446—Windings
    • 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
    • E05Y2400/32—Position control, detection or monitoring
    • E05Y2400/322—Position control, detection or monitoring by using absolute position sensors
    • E05Y2400/324—Switches
    • 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
    • E05Y2400/32—Position control, detection or monitoring
    • E05Y2400/322—Position control, detection or monitoring by using absolute position sensors
    • E05Y2400/328—Position control, detection or monitoring by using absolute position sensors of the linear type
    • 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
    • E05Y2400/32—Position control, detection or monitoring
    • E05Y2400/35—Position control, detection or monitoring related to specific positions
    • E05Y2400/354—End positions
    • 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
    • E05Y2800/20—Combinations of elements
    • E05Y2800/22—Combinations of elements of not identical elements of the same category, e.g. combinations of not identical springs
    • 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
    • E05Y2900/146—Shutters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18832—Reciprocating or oscillating to or from alternating rotary including flexible drive connector [e.g., belt, chain, strand, etc.]

Definitions

  • ABSTRACT OF THE DISCLOSURE An electrically driven displacing mechanism, for example for curtains, accordian-folded partitions, drawers, or display of advertising aids, which are guided along at least one rail by means of carrying elements, which mechanism comprises an endless conveying band or web in two sections extending along the rail, and entraining elements guided on the rail for conveying action back and forth, as well as two electrical terminal switches in the circuit of the electrical drive, which are actuated automatically corresponding to the two predetermined final conveying positions.
  • resilient stops determining the final positions of a curtain are arranged on the rail for example, which open the associated terminal switch in the driving circuit on being struck by the sliders of the curtain.
  • the one of these stops and terminal switches are situated at the end of therail adjacent to the driving motor, in order to keep the curtain in the open position reached, for example, the other stop and terminal switch must perforce be situated in the middle region of the rail length in .a two-piece contradirectional curtain system, or at the opposite end of the rail in a one-piece curtain system, in order to stop the curtain in the closed position.
  • the electrical drive is switched off when the curtain reaches the opened position, by virtue of the fact that a column of curtain sliders pushed together by the one driving or entraining element strikes the 'stop, which may cause jamming of the sliders in the rail guide channel.
  • the tractive section is placed under tension when the curtain sliders strike a terminal stop, and the rapidly risingtension in the tractive section displaces a switching'cam transversely displaceable thereto, into the position interrupting the driving circuit.
  • the participatingparts of the displacing mechanism are exces'sively stressed however, and the conveying web or cord, generally made of nylon or hemp, lengthens owing to this stress, in such degree that the switch-off action soon ceases to operate unless the length of the cord is reduced by the appropriate amount.
  • Another switch-off system for curtains has two terminal switches at the same extremity of the rail, of which one is arranged to be actuated by the pushed-together slider column of the fully gathered curtain, and the other by the last slider of the opened curtain. This requires precise initial calculation of the position of the curtain sliders when pulled apart, which is generally determined in practice by rigorous testing, the desirable precision not being retained in use however.
  • an electrically actuated displacing mechanism for objects which are guided on a rail by means of carrying elements comprises an endless driven conveying means having two sections extending along the rail, an electrical drive for said conveying means, entraining elements guided on the rail so as to be conveyed backwards and forwards along the rail, two electrical terminal switches in the circuit supplying the electrical drive which switches are arranged to be actuated automatically at two predetermined final conveying positions of the conveying means, a cursor fastened in longitudinally adjustable manner on each of the two sections of the conveying means, which cursors are independent of the entraining elements and are respectively arranged to actuate the terminal switches associated with the sections of the conveying means.
  • FIGURES 1 to 3 each show a cross-section through the curtain rail according to the invention along the lines II, II-II and IIIIII in FIG. 4 as well as parts of the mechanism housed in the rail,
  • FIGURE 4 is a longitudinal section through the curtain rail with parts of the mechanism shown in side elevation
  • FIGURE 5 shows a section of another curtain rail according to the invention fora two-piece set of curtains
  • FIGURES 6 and 7 schematically show the essential parts of the mechanism for an opened and closed twopiece contradirectional curtain system.
  • a hollow section curtain rail 1 illustrated in FIGS. 1 to 4 has two channels 2 for reception of two longitudinal sections 3' and 3" of a driven conveying web, whose ends (not shown) are fastened to each other, and which runs over return pulleys or'the like at the two ends of the rail, and which may be driven in either direction of revolution by means of an electric motor 5, driving at least one point 4 of the pulley at one of the deflection points for the web (FIGS. 6 and 7).
  • the guide channel 6 is connected at each side by a longitudinal slot 7 with the channels 2 and is open at the bottom, forming the outer longitudinal slot 8 of th rail.
  • Sleeve-shaped cursors 9 and 9" are respectively mounted on the two web sections 3' and 3" and are releasably fastened. by means of set screws 10 whose heads 11 are directed towards the channel 6 within the longitudinal slot 7 and are accessible from the outside at any time through the outer longitudinal slot 8, for example by means of an angled or ofiset screwdriver, so that the cursors may be displaced and refastened on the web or cord even after hanging the curtains.
  • switches 12' and 12" are mounted on the underside of the rail and on either side of the outer longitudinal slot 8, by means of an angle bracket 13 in each instance.
  • the switches 12 and 12" interrupt the circuit of the driving motor 5 for one direction of revolution or the other, only by depression of their spring arm 14, and roller 15.
  • the therminal switches 12' and 12" are respectively actuated by switching canis 16' and 16" longitudinally guided in the rail 1, supported like a slider in the slider channel 6 and projecting through the one connecting slot 7 or the other into the one or the other of the channels 2 and thus into the path of travel of one of the cursors 9' or 9" displaceable therein with the driving web so that the two switching cams do not touch and foul each other of the symmetrical halves of the cross-section of the slider channel 6.
  • Projections 17 and 17" extend from the cams 16' and 16" through the outer longitudinal rail slot 8 below the rail, so that depression of the switch roller 15 opens the corresponding terminal switch 12' or 12" when the cam 16 or 16 is displaced by the cursor 9 or 9" in the one direction of revolution of the web or the other.
  • the outer end face of the switching cam 16' is thereby made to bear on a relatively weak return spring 18 which is supported 'on the casing 19 at the end of the rail adjacent to the motor and stores sufiicient energy as a result of the transmission from the motor 5 through the web, the cursor and cam, in order to impel the cam away from the roller 15 for the other direction of revolution of the web or cord.
  • a relatively weak return spring 18 which is supported 'on the casing 19 at the end of the rail adjacent to the motor and stores sufiicient energy as a result of the transmission from the motor 5 through the web, the cursor and cam, in order to impel the cam away from the roller 15 for the other direction of revolution of the web or cord.
  • the change in direction of rotation is based on phase displacement by interposition of a condenser 32 as shown in the motor circuit 30.
  • the terminal switch 12 supplies in closed position the winding 31, while the other terminal switch is in open position, and vice versa.
  • the motor circuit 30 includes a reversing actuation switch 33, by means of which current may be fed to one terminal switch or the other in only one operating position in each case, and the current may be interrupted in a third position.
  • This reversing switch 33 may be actuated manually, mechanically or else electrically, e.g. by a dimming switch employing a photoelectric cell.
  • the conveying web with its two sections 3' and 3" and the cursors 9' and 9-", as well as the two switching cams 16' and 16", may also be employed in the curtain rail 20 shown in FIG. 5, wherein the channels 21 for the web sections extend side by side and are of equal size and spacing as in the rail 1, but wherein two slider channels 22 are each formed in the outer side of the rail adjacent to one or the other cord channel 21.
  • a return spring 18 in FIG. 3 is accordingly situated in each slider channel 22.
  • two synchronously operated driving motors may be used, one at each end of the rail.
  • the electrical connection cable 23 can then advantageously be installed in the upper hollow space 24. or 25 of the rail 1 or 20,, wherein it is screened from sight, contact and damage by virtue of the rail mounting.
  • the driving motor 5 need not be situated in the immediate vicinity of the end of the curtain, but may for example, be fastened in a wall recess or even in an adjoining room, if the end of the rail extends that far. This also applies in respect of displacing mechanism for other objects, for which a hidden arrangement of the drive is desirable.
  • An electrically actuated displacing mechanism for objects which are guided on a rail by means of carrying elements comprising an endless driven conveying means having two sections extending along the rail, an electrical drive for said conveying means, entraining elements guided on the rail so as to be conveyed backwards and forwards along the rail, two electrical terminal switches in the circuit supplying the electrical drive which switches are arranged to be actuated automatically at two predetermined final conveying positions of the conveying means, a cursor fastened in longitudinally adjustable manner on each of the two sections of the conveying means, which cursors are independent of the entraining elements and are respectively arranged to actuate the terminal switches associated with the sections of the conveying means.
  • each of the cursors is displaceably guided on the rail
  • two switching cams are respectively associated with the two sections of the web and are displaceably guided on the rail independently of the web, the switching cams are respectively arranged to open and close the terminal switches, and the cursors and the switching cams project into the path of travel of said objects from opposite sides of the rail.
  • a mechanism according to claim 2 comprising a return spring which is compressed by one of the switching cams when that cam switches off its terminal switch and is located between that switching cam and the end of the rail carrying the terminal switches.
  • the rail is a hollow section rail having two channels for the two sections of the conveying web and at least one guiding channel for the carrying elements, the cursors are guided in the conveying web channels, and the switching cams are constructed as sliders supported in the carrying element channel and project into the conveying web channels as well as out of the rail through a longitudinal rail slot formed on the carrying element channel.
  • each switching cam occupies less than one symmetrical half of the channel cross-section in the carrying element channel.

Landscapes

  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
US519547A 1965-01-13 1966-01-10 Electrically driven displacing mechanism Expired - Lifetime US3372599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH42465A CH420521A (de) 1965-01-13 1965-01-13 Elektrisch antreibbare Verschiebevorrichtung für Objekte

Publications (1)

Publication Number Publication Date
US3372599A true US3372599A (en) 1968-03-12

Family

ID=4186705

Family Applications (1)

Application Number Title Priority Date Filing Date
US519547A Expired - Lifetime US3372599A (en) 1965-01-13 1966-01-10 Electrically driven displacing mechanism

Country Status (7)

Country Link
US (1) US3372599A (sr)
AT (1) AT251229B (sr)
BE (1) BE674983A (sr)
CH (1) CH420521A (sr)
DE (1) DE1260718B (sr)
GB (1) GB1139072A (sr)
NL (1) NL6600423A (sr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753457A (en) * 1970-07-28 1973-08-21 Konrad Bratschi Electromechanical pulling device for rail-guided hangings, particularly curtains
US4272997A (en) * 1978-08-17 1981-06-16 H. A. Phillips & Co. Drive mechanism
US4770224A (en) * 1986-06-18 1988-09-13 Kelley Company, Inc. Power operated industrial door
US4827199A (en) * 1988-03-15 1989-05-02 Graber Industries, Inc. Torque responsive motor-drive assembly
US4852628A (en) * 1987-04-27 1989-08-01 Labex Gmbh Suspension system for folding door
US4995442A (en) * 1988-06-10 1991-02-26 Marzec Stanley E Curtain opening device
CN105971438A (zh) * 2016-06-21 2016-09-28 宁波中车时代传感技术有限公司 一种车门系统的传动机构
CN112901028A (zh) * 2021-01-20 2021-06-04 吴愈祥 一种微波辐射屏蔽中空玻璃

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012253B2 (ja) * 1980-04-30 1985-03-30 日産自動車株式会社 開閉ル−フ式自動車の可動ル−フ作動制御用スイツチ機構
US4438972A (en) * 1981-04-28 1984-03-27 Nissan Motor Company, Limited Operating mechanism for operating a sliding and tilting roof-panel
GB8315214D0 (en) * 1983-06-03 1983-07-06 Protopapas X A Alexelion
CN113445850A (zh) * 2021-07-12 2021-09-28 广东路遥医特工程有限公司 一种重型稳定可调节的开门机组

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1166968A (fr) * 1957-02-22 1958-11-18 Système mécanique pour l'actionnement des rideaux, tentures et articles analogues
US3003552A (en) * 1959-04-03 1961-10-10 Electric Traverse Rod Company Drapery traverse
US3153942A (en) * 1960-12-27 1964-10-27 Gen Electric Linear actuating arrangement
CH391986A (de) * 1962-02-12 1965-05-15 Schmidt Fa Julius Haltevorrichtung zum Befestigen von Tragschienen für Gardinen, Vorhänge und dergleichen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1166968A (fr) * 1957-02-22 1958-11-18 Système mécanique pour l'actionnement des rideaux, tentures et articles analogues
US3003552A (en) * 1959-04-03 1961-10-10 Electric Traverse Rod Company Drapery traverse
US3153942A (en) * 1960-12-27 1964-10-27 Gen Electric Linear actuating arrangement
CH391986A (de) * 1962-02-12 1965-05-15 Schmidt Fa Julius Haltevorrichtung zum Befestigen von Tragschienen für Gardinen, Vorhänge und dergleichen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753457A (en) * 1970-07-28 1973-08-21 Konrad Bratschi Electromechanical pulling device for rail-guided hangings, particularly curtains
US4272997A (en) * 1978-08-17 1981-06-16 H. A. Phillips & Co. Drive mechanism
US4770224A (en) * 1986-06-18 1988-09-13 Kelley Company, Inc. Power operated industrial door
US4852628A (en) * 1987-04-27 1989-08-01 Labex Gmbh Suspension system for folding door
US4827199A (en) * 1988-03-15 1989-05-02 Graber Industries, Inc. Torque responsive motor-drive assembly
US4995442A (en) * 1988-06-10 1991-02-26 Marzec Stanley E Curtain opening device
CN105971438A (zh) * 2016-06-21 2016-09-28 宁波中车时代传感技术有限公司 一种车门系统的传动机构
CN105971438B (zh) * 2016-06-21 2018-06-22 宁波中车时代传感技术有限公司 一种车门系统的传动机构
CN112901028A (zh) * 2021-01-20 2021-06-04 吴愈祥 一种微波辐射屏蔽中空玻璃

Also Published As

Publication number Publication date
NL6600423A (sr) 1966-07-14
CH420521A (de) 1966-09-15
DE1260718B (de) 1968-02-08
BE674983A (sr) 1966-05-03
GB1139072A (en) 1969-01-08
AT251229B (de) 1966-12-27

Similar Documents

Publication Publication Date Title
US3372599A (en) Electrically driven displacing mechanism
US2468453A (en) Reversible drive mechanism
US3003552A (en) Drapery traverse
CA2054271A1 (en) Electromagnetic relay
EP0456881B1 (en) Raceway for supporting a duct-holder chain, and movable device for cleaning a textile apparatus
BR9709034A (pt) Dispositivo para abrir e fechar uma porta corrediça.
US20110025150A1 (en) Dual electromotive furniture drive
US3374823A (en) Structural device
US3533188A (en) Door operating mechanisms
US3252503A (en) Garage door operator
US4227564A (en) Curtain track with traverse cord
KR102174447B1 (ko) 리니어 모터로 구동되는 자동문
US2574312A (en) Closure operating means
US4536626A (en) Timer drive mechanism
US3513900A (en) Curtain drawing mechanism
CN209591841U (zh) 开关互锁结构及安装该开关互锁结构的电气柜
WO2021110291A1 (en) Waterproof power supply track with cable retracting mechanism
DE69709764D1 (de) Übermässig ausziehbare teleskopschiene für schubladen
ITMI991457A1 (it) Azionatore per porta di garage
EP3754802A1 (en) A retractable cable management device
BR9604519A (pt) Aparelho elétrico
US2747864A (en) Door operating apparatus
CN212137091U (zh) 一种单边驱动活门机构
US788539A (en) Device for controlling elevator-lights.
US3774093A (en) Drive device for back and forth movement