US2227556A

US2227556A - Apparatus for opening and closing garage doors

Info

Publication number: US2227556A
Application number: US273512A
Authority: US
Inventors: Willie L Roberts
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-05-13
Filing date: 1939-05-13
Publication date: 1941-01-07
Anticipated expiration: 1958-01-07

Description

Jan. '7, 1941. W. l., ROBERTS `APPARATUS FOR OPENING AND CLOSING GARAGE DOORS Filed May l5, 1959 4 Sheets-Sheet l Jan. 7, 1941. w, l.. ROBERTS APPARATUS FOR OPENING AND CLOSING GARAGE DOORS Snuentor W/ZZife L. RoberZJ,

Gttorneg Jan. 7, 1941- w. l.. ROBERTS APPARATUS FOR OPENING AND CLOSING GARAGE DOORS Filed may 13, 1939 4 sheets-sheet 5 Illlll Summer 74517116 L. Fobers,

dttornegl WQ bmi D ///K^/ l/// W. L. ROBERTS APPARATUS FGR OPENING AND CLOSING GARAGE DOORS Filed May 13, 1959 Jan. 7, 1941.

Snventor Willie L ]oZzers,

f/MW,

incrncgu rammed Jan. 7, 1941 I Z,.ZZ?,55t

Unirse STATES rieur erica APPARATUS FOR OPENING AND CLOSING GARAGE DOORS Willie L. Roberts, Lees Summit, Mo.

Application May 13, 1939, Serial No. 273,512

22 Claims. (Cl. 268-35) My invention relates to automatic door opening Referring in detail to the different parts, A and closing apparatus and more particularly to designates a garage which in the present instance apparatus for opening and closing garage doors. is equipped with a pair of doors B hinged to swing One object of the invention is to provide apoutwardly in a horizontal plane as indicated by 5 paratus which may be automatically actuated by dotted lines, Fig. 7. 5 an automobile to open the doors as the autoino- A track 2, fixed iirmly upon the garage oor bile is about to enter the garage and to close the C, extends from a point near the rear wall D of doors after the automobile has been driven into the garage outwardly a suitable distance beyond the garage, also to open the doors when the the doors B as disclosed by Fig. 1. The track 2 1o automobile is being backed out of the garage and is of tubular form, Fig. 10, and its upper Wall has 10 to close the doors after the automobile has left a longitudinal slot 4 to admit the lower portion the garage, of a carriage 6, Figs. 8 to 10, inclusive. The car- Another object is to provide door opening and riaee 6 has a frame i provided at its upper forclosing apparatus which may be actuated without ward portion with a vertical roller I0 adapted l5 requiring the driver to dismount from or stop the to be contacted by the bumper E of a motor ve- 15 automobile. hicle. In order that the roller il] may be raised A further object is to provide manual means or lowered to accommodate bumpers of different whereby the doors may be opened from the inheights, the frame Bis equipped with front and side and also from the outside of the garage. real" lees l2 and I4 adiustably mounted in Open- 30 Another object of `the invention is to provide ings i5 and i3, eslletively, in the lOWeI DOllJiOrl 20 door opening and closing apparatus which may be 0f the frame- The legs l2 and 4 are thin enough manufactured and. installed at a reasonable cost to pass through the slot 4 of track 2 should it and will be reliable in operation. be necessary to lower roller `It] from the position Other objects will hereinafter appear, and in shown on the drawings. Set screws 22 and 2li order that the invention may be fully understood, serve te Secure the respective less i2 and i4 at 25 reference will now be had to the accompanying any peint 0f their adjustment. The carriage drawings, in which: is guided by the slotted portion of track 2 through Fig. 1 is a vertical longitudinal section of a which the lower portion 25 of the Carriage progarage equipped with my door operating apjects, and in order that the operation of the carparatus. riage may be attended with a minimum of fric- 30 Fig. 2 is a broken side elevation of means tion each side of the lower portion 25 is provided whereby the doors may be manually opened from with four rollers comprising an upper pair 26 the inside and also from the outside of the garage. arranged to travel on top of the track and a Fig. 3 is a side elevation of shuttle means and IOWer Deir 28 adapted to travel against the under $5 associated partsside of the slotted wall of the track, a slight 35 Fig. 4 is a longitudinal section on line 4-4 of amount of space being left between the lower Fig; 3, rollers 28 and the wall of the track to allow free Fig. 5 is a vertical cross section on line 5 5 of forward and backward movement of the carriage. Fig, 3, Normally the carriage 6 is positioned at the 40 Fig. 6 is a broken longitudinal section on line outer end of track 2, Fig. 1, so that when a car is 40 6 6 of Fig. 4. about to enter the garage the bumper E will con- `Fig. 7 is a plan view of a part of the door opertact roller l!) and push the carriage towards the ating mechanism with the garage doors in horiinner end of the track. As the carriage starts Y zontal section. on its inward movement a roller 32 associated Fig. 8 is an enlarged side elevation of a carriage therewith and which normally rests upon a 45 with the bumper of a motor vehicle about to be sheave housing 34 is lifted with a pair of small coupled to said carriage. rollers 36 which travel up the front end of the Fig. 9 is a fragmentary side elevation of the track to the upper surface thereof preparatory carriage coupled to the bumper. to traveling inward upon the track. The rollers mi Fig. 10 is a front `elevation of the carriage with :i6 are mounted upon a shaft 38 which also ex- 50 the parts in the position shown by Fig. 9. tends through the roller 32 and the adjacent Fig. 11 is a detail of one of the shuttles. ends or a pair of levers Ml fulcrumed intermediate Fig. 12 is an enlarged fragmentary detail partly their ends upon a pivot 42 extending through the in section of part of the linkage employed in operiront leg l2 of the carriage. As the roller 32 55 ating `the doors. moves upward the levers 40 pull downward upon 55

links

44 and 46 and actuate two

levers

48 and 50, the forward ends of which swing toward each other and carry forwardly

tapered rollers

52 and 54 behind the bumper E, Fig. 9, and thus couple the carriage 6 to the bumper. Link 44 is connected at its lower and upper ends to the rear ends of

levers

46 and 48 with

pivots

56 and 58, respectively, and links 46 are connected at their lower ends to pivot 58 and at their upper ends to the rear portion of lever 50 with a pivot 62. The

levers

48 and 50 are fulcrumed upon

pivots

60 and 64, and the

rollers

52 and 54 are mounted upon stub shafts 53 and 55 threaded in the forward ends of

levers

48 and 50 and carrying

antifriction rollers

66 and 68, respectively. By thus providing carriage 6 with the rollers I0, 52, 54, 66 and 68 the bumper E may move laterally and vertically to a limited extent without creating undue friction in the event the motor vehicle deviates from a straight line or passes over small obstructions in its path when operating the carriage 6. A coiled spring 69 is connected to the carriage frame 8 and link 44 to exert an upward pull on the latter and hold the rollers 36 down upon track 2. The forward ends of

rollers

52 and 54 are equipped with reflectors 51 and 59, respectively, which constitute guides for the operator of a motor vehicle when approaching the garage doors B at night, by reflecting the light from the lamps of the motor vehicle.

As the carriage 6 is pushed inward by a motor vehicle, it actuates a cable 14 secured at its ends to the lower portion 25 of the carriage. The cable 14 extends forwardly from the carriage around a sheave 16, rearwardly through a longitudinal groove 18 in the garage ioor C, around a lower sheave 80, upwardly over an overhead sheave 82, forwardly to a sheave 84, rearwardly to a sheave 86, downwardly to a sheave 88 and forwardly through the tubular track 2 to the lower portion 25 of the carriage. As shown by Fig. 1, sheave 16 is mounted in the sheave housing 34 at the front end of track 2,

sheaves

80 and 88 are mounted in a housing 60 at the lower rear portion of the garage,

sheaves

82 and 86 are mounted in a housing 92 at the upper rear portion of the garage, and sheave 84 is mounted in a housing 84 at the upper forward portion of the garage.

Means for holding the cable taut is provided in the form of a manually operated screw 96 threaded in a nut 88 and operably connected at its forward end to the sheave housing 92. Tensioning means is also provided in the form of a coil spring 99 interposed between a bracket |00 and a nut |02, which latter is threaded upon a stem |04, extending freely through the bracket |06 and secured to the housing 04.

Housings

92 and 94 are slidable in guides |05 and |06, respectively, secured to an overhead beam |08 extending from the front wall to the rear wall of the garage. As shown by Fig. l the sheaves 82, 84 and 85 are so positioned as to maintain those portions of the cable traveling between them in parallel relation to each other as indicated at ||0 and ||2 for `the operation of a pair of upper and lower shuttles I I4 and I6, respectively, Figs. 3 to 6, inclusive.

Each shuttle is of triangular form and comprises a straight base H8 and sides |20 and |22 extending at acute angles from the ends of the base to the apex of the triangle which has a recess |26 for the reception of an element |28 as shown by Fig. 4. Element |28 is preferably in the form of a ball xed to cable 14 to travel therewith. The sides |20 and R22 of each triangle have respective grooves |30 and |32 through which the cable is free to pass as will hereinafter appear. Each upper shuttle ||4 and the one immediately below it are fixedly mounted midway between their respective ends upon a vertically-disposed crank shaft |34 which extends freely through a cross-head |36 and a slide 38. The lower crank ends of the shafts |34 are connected by a coil spring |48 which assists in cperating the shuttles and in yieldably holding them in the different positions which they assume, as shown by full and dotted lines on Fig. 4. The cross-head |36 extends transversely through slots |42 and its ends |44 extend forward in parallel relation to each other for connection to the garage doors B through linkage, as will hereinafter appear.

The rear portion of the crossed rods |66 extend freely through the respective eye-bolts |82 and each is provided with coil springs E66', Fig. 7, interposed between opposite sides of the associated eye-bolt and a pair of collars 88, adjustably secured to the associated rod |86 with set screws 200. The springs |96 afford cushioning means which prevent sudden movement and shock to the doors B when they are being opened or closed. Shock to the doors B is further avoided by arranging the foregoing linkage in such manner that the opening and closing movements of the doors will start and end slowly while the motor vehicle which effects the opening and closing movements may travel at a constant speed. This may be understood on referring to the arrows a, a, Fig. 7, which show that the rear ends of the arms |10 move nearly in lateral directions as they approach the ends of their forward and backward movements and move forward and backward during the intermediate portions of their movements. This results in the doors `moving slowly near the ends of their `respective movements and, in their acceleration and deceleration as they pass through theintermediate portions of their movements.

The linkage is also arranged to secure the doors B either in open or closed position. This is accomplished by arranging each pivot |112 so that it will intersect a straight line extending through the associated eyebolt |82 and the forward pivotal end of the rod when the doors are in closed position, and arranging each pivot |=9| so that it will intersect a straight line eX- tending through the associated pivots |84 and |92, `when the doors are in open position.`

Briefly the operation is `as follows: When a motor vehicle is about to enter the garage the bumper E contacts roller I6 and moves the carriage 6 inward. As the carriage starts on its Yinward movement rollers 36 move upward to the top of track 2 and the lower part of roller 32 enters slot 4 and assists `in guiding the carriage. When the rollers 36 move upward as stated they, through the medium of the intervening mechanism, move the

coupling rollers

52 and 54 toward each other so that they will `pass behind the bumper E, and thus couple the carriage 6 to the motor vehicle. As the carriage 6 .travels inward it operates the cable 14 which carries ball |28 into recesses |26 of the upper pair of shuttles ||4 and `moves the upper and lower pairs of shuttles |4 `and I 6respectively, forward to the right. Figs. 3 and `4. As the shuttles start on their forward movement the `front ends of the enlarged portions |46 of slots |42 force the rear ends of the shuttles inward so that ball |28 will be heldin the .recesses |26 of the upper pair of shuttles as shown in dotted lines in the intermediate portions of I'ig- 4. The shuttles are maintained in parallel relation until they reach the enlarged ends |48 of the slots |42, whereupon the forward ends of the shuttles contact and are spread apart by the wedge member 56 to release the ball |28 so that it may continue its forward movement. As the shuttles move forward as stated they effect the opening of doors B for entrance of theautomobile into the garage, through the medium of cross-head |36 and linkage hereinbefore described. Ball |28 travels forward, then around sheave 84, and then backward to enter recesses |26 of the lower shuttles ||6 to return the shuttles to their starting point where their rear ends are forced apart `by the wedge member |54 to release the ball 28 so that it may continue its backward movement until the carriage 6 reaches the end of its inward movement` As the shuttles 'move backward to their starting point they close the doors behind the motor vehicle through the medium of the intervening mechanism. 'I'he carriage 6 remains coupled to the automobile so that when the latter is backed out of the garage it will pull the carriage therewith.

When the motor vehicle leaves the garage the operation is a reversal of what takes place when the motor vehicle enters the garage, so further description is deemed unnecessary other than to state that as the rollers 36 move downward from the outer end of the track 2 they, through the medium of the intervening mechanism, move the

rollers

52 and 54 away from each other so that the bumper E may `pass out from between said rollers and'thus uncouple carriage 6 from the motor vehicle.

.If desired the :garage may be equipped with a small door through which the operator may enter and leave the garage, but in the present instance I have shown manual means whereby the main doors B- may be partly opened for that purpose. This is effected through the medium of an outer hand lever 204, an inner hand lever 266, a cord 208 attached at one end to lever 266 and at its other end to the rear end of the adjacent arm Fill, and a cord 2| 0 attached at one end to the rear end of the other arm Illl and at its forward end to the cord 266. Cord 223 is guided in `its movements by sheaves 2|2 and 2M, while `cord 2 |6 is guided by sheaves 2|6 and 2 lll.

'lhe 'hand levers 264 and 266 are `fulcrumed at their adjacentends upon a pivot 22|). The upper end `of hand lever 264 is bent at an angle to pass through a slot 22| in the front wall of the garage and overlap `the adjacent end of lever 206. When the `operator desires to enter the garage the lower end of lever 204 is grasped and pulled upwardly so Ait will push downwardly upon lever 266 and open doors B `through the medium of the intervening mechanism. After the operator enters the Vgarage he may close the doors by pulling inward upon handles 222 xed to the inner side of the respective doors. If the operator desires to leave the garage without backing the motor vehicle, lever 265 is pulled downwardly to elect partial opening of the doors in the same manner as when the hand lever 204 was operated. After passing outwardly between the doors B they may be `pushed to closed position and locked by passing the hasp oi a ,padlock le through registering holes inthe lever 264 and a keeper 225 secured to the adjacent door post H.

From the foregoing description it is apparent that I have provided ecient apparatus well `adapted for the purpose intended, and while I have shown "the apparatus in connection with a pair of doors swingable in a horizontal plane, it

lis obvious that it may be arranged to operate a I also reserve gate, or an overhead garage door. all rightsto such other changes as within the spirit and scope of the claimed.

Having thus described my invention, what I `claim and desire to secure by Letters Patent, is:

l. A `door 4operating apparatus comprising reciprocatory shuttle means, means connecting the door to the shuttle means for opening the door on movement of the shuttle means in one direction and forclosing the door on the reverse movement of said shuttle means, a guide sheave located between the door and the shuttle means, a reciprocatory cable extending forward through the shuttle means Vthen around the guide sheave and properly fall invention as `back through the shuttle means, an element xed to said cable to operate the shuttle means, means vfor engaging the shuttle means with said element as the latter travels towards the guide sheave and again `engage the shuttle means with the element as the latter travels backward after passing `around the guide sheave, means for disengaging the shuttle means from said element as the shuttle means reaches the end of each movement, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and eiiect the opening and closing of the doors on each forward movement and again on each backward movement of said carriagel `2. A door operating apparatus comprising reciprocatory shuttle means, means connecting the door to the shuttle means for opening the door on movement of the shuttle means in one direction and for closing the door on the reverse movement of said shuttle means, a guide sheave located between the door and the shuttle means, a reciprocatory cable extending forward through the shuttle means then around the guide sheave and back through the shuttle means, an element fixed to said cable to operate the shuttle means, means for engaging the shuttle means with said element as the latter travels towards the guide sheave and again engage the shuttle means with the element as the latter travels backward after passing around the guide sheave, means for disengaging the shuttle means from said element as the shuttle means reaches the end of each movement, a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and effect the opening and closing of the door on each forward movement and again on each backward movement of ysaid carriage, coupling means on the carriage adapted to engage the motor vehicle, a track on which the carriage travels, and means on the carriage adapted to coact with said track in engaging the coupling means with the motor vehicle as the carriage starts forward and disengage the coupling means from the motor vehicle as the carriage reaches the end of its backward movement.

3. A door operating apparatus comprising reciprocatory shuttle means, linkage means connecting the door to the shuttle means for opening the door on movement of the shuttle means in one direction and for closing the door on the reverse movement of said shuttle means, a guide located between the door and the shuttle means, a reciprocatory cable extending forward through the shuttle means then around the guide and back through the shuttle means, an element Xed to said cable to operate the shuttle means, means for engaging the shuttle means with said element as the latter travels towards the guide and again engage the shuttle means with the element as the latter travels backward after passing around the guide, means for disengaging the shuttle means from said element as the shuttle means reaches the end of each movement, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and effect the opening and closing of the door on each forward movement and again on each backward movement of said carriage.

4. A door operating apparatus comprising reciprocatory shuttle means, means connecting the door to the shuttle means for opening the door on movement of the shuttle means' in one direction and for closing the door on the reverse movement of said shuttle means, a guide sheave located between the door and the shuttle means, a reciprocatory cable extending forward through the shuttle means then around the guide sheave and back through the shuttle means, an element xed to said cable to operate the shuttle means, parallel guide means for engaging the shuttle means with said element as the latter travels towards the guide sheave and again engage the shuttle means with the element as the latter travels backward after passing around the guide sheave, means for disengaging the shuttle means from said element as the shuttle means reaches the end of each movement, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and effect the opening and closing of the door on each forward movement and again on each backward movement of said carriage.

5. A door operating apparatus comprising upper and lower pairs of reciprocatory shuttles operably connected for simultaneous movement, mechanism connecting the door to said shuttles for opening the door on movement of the shuttles in one direction and for closing the door on the reverse movement of the shuttles, a guide sheave located between the door and the shuttles, a reciprocatory cable extending forward between the upper pair of shuttles then around the guide sheave and back between the lower pair of shuttles, an element fixed to said cable to operate the shuttles, means for engaging the upper pair of shuttles with said element as it travels towards the guide sheave and for engaging the lower pair of shuttles with the element as it travels backward after passing around the guide sheave, said means also engaging the lower pair of shuttles with said element when the cable travels in a reverse direction and engaging the upper pair of shuttles with the element after it has passed around the guide sheave, means for disengaging the shuttles from the element as they reach the end of their movements, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and effect the opening and closing of the doors on each forward movement and again on each backward movement of said carriage.

6. A door operating apparatus comprising upper and lower pairs of reciprocatory shuttles operably connected for simultaneous movement, mechanism connecting the door to said shuttles for opening the door on movement of the shuttles in one direction and for closing the door on the reverse movement of the shuttles, a guide sheave located between the door and the shuttles, a reciprocatory cable extending forward between the upper pair of shuttles then around the guide sheave and back between the lower pair of shuttles, an element xed to said cable to operate the shuttles, parallel slideways for engaging the upper pair of shuttles with said element as it travels towards the guide sheave and for engaging the lower pair of shuttles with the element as it travels backward after passing around the guide sheave, said parallel slideways also engaging the lower pair of shuttles with said element` when the cable travels in a reverse direction and engaging the upper pair of shuttles with the element after it has passed around the guide sheave, means associated with said slideways for disengaging the shuttles from the element as they` reach the end of their movements, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and eiect the opening and closing of the doors on each forward movement and again on each backward movement of said carriage.

"I, A door operating apparatus comprising upper and lower pairs of reciprocatory shuttles operably connected for simultaneous movement, mechanism connecting the door to said shuttles for opening the door on movement of the shuttles in one direction and for closing the door on the reverse movement of the shuttles, a guide sheave located 'between the door and the shuttles, a reciprocatory cable extending forward between the upper pair of shuttles then around the guide sheave and back between the lower pair of shuttles, an element xed to said cable to operate the shuttles, parallel slideways for engaging the upper pair of shuttles with said element as it CII travels 'towards the guide sheave and for engaging the lower pair of shuttles with the element as it travels backward after passing around the guide sheave, said parallel slideways also engaging the lower pair of shuttles with said element when the cable travels in a reverse direction and engaging the upper pair of shuttles with the element after it has passed around .the guide sheave, wedge means associated with the ends of said sldeways for disengaging the shuttles from the element, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the cable and effect the opening and closing of the doors on each forward movement and again on each backward movement of said carriage.

8. A door operating apparatus comprising upper and lower pairs of reciprocatory shuttles, a cross-head towhich said shuttles are operably connected, mechanism connecting the door to said cross-head for opening the door on movement of the cross-head in one direction and for closing the door on .the reverse movementI of the cross-head, a guide sheave located between the door and the shuttles, a reciprocatory cable exallel slideways also engaging the lower pair of shuttles with said element when the cable travels in a reverse direction and engaging the upper pair of shuttles with the element after it has passed around .the guide sheave, mean-s .associated with said slideways for disengaging the shutties from the element as they reach the end of their movements, and a carriage adapted to be propelled forward and backward by a motor vehicle to reciprocate the calble and effect the opening and closing of the doors on each forward movement and again on each backward movement of said carriage.

9. A door operating apparatus comprising upper and lower pairs of reciprocatory shuttles, a cross-head, crank shafts operably mounted in said cross-head and to which the shuttles are fixed, a coil spring yieldably connected to said crank shafts, mechanism connecting the door to said cross-head for opening the door on movement of the cross-head in one direction and for closing the door on the reverse movement of the cross-head, a guide sheave located between the door and the shuttles, a reciprocatory cable extending forward .between the upper pair of shuttles :then around the guide sheave and back between the upper pair of shuttles, an element xed :to said cable to operate the shuttles, parallel slideways for engaging the upper pair of shuttles with said element as it travels towards the guide sheave and for engaging the lower pair of shuttles with the element as it travels backward after passing around the guide sheave, said parallel slideways .also engaging the lower pair of shuttles with said element when the cable travels in a reverse direction and engaging the upper pair of shuttles with the element after it has passed around the guide sheave, means associated wit-h said slideways for disengaging the shuttles from the element as they reach the end of their movements, and a carriage adapted to be propelled forward and backward by a motor vehicle .to reciprocate the cable and eifect the opening .and closing of the doors on each forward movement and again on each backward movement of said carriage.

10. In apparatus for operating garage doors, a track extending from the outside to the inside of the garage, a carriage .arranged to be propelled inward and outward on said track by a motor vehicle, mechanism controlled by the carriage adapted to open and close the doors as .the carriage moves in either direction, coupling means on the carriage for engaging the motor vehicle, and means on the carriage cooperating with the trac-k for controlling said coupling means.

11. In .apparatus for operating garage doors, a track extending from the outside to the inside of the garage, a carriage adapted to be propelled inward and outward on said track by a motor vehicle, mechanism controlled by the carriage and adapted to open and close the doors as the carriage moves in either direction, coupling means on .the carriage for engaging the motor vehicle, a roller controlled by the carriage and the track, and means mounted on the carriage and controlled by said roller for operating the coupling means.

12. In apparatus for operating garage doors, a track extending from the outside to the inside of ,the garage, a carriage adapted yto be propelled inward and outward on said track by a motor vehicle, mechanism controlled by the carriage and adapted to open and close the doors as the carriage moves in either direction, coupling means on the carriage for engaging the motor vehicle, rollers adapted to move to the upper surface of the track as the carriage moves inward and to move downward at the outer end of the track as the carriage reaches the end of its outward movement, a lever mounted on the carriage and controlled by sai-d rollers, means on the carriage controlled by said lever for moving the coupling means to active position as the rollers move upward and for moving the coupling means to idle position as the rollers move downward.

13. In apparatus for operating garage doors, a track extending from the outside to the inside of .the garage, a carriage adapted to be propelled inward and outward on said track by a motor vehicle, mechanism controlled by the carriage and adapted to open and close the doors as the carriage moves in either direction, a pair of coupling rollers for engaging .the motor vehicle, levers fulcrumed on the carriage and upon the forward ends of which said rollers are mounted, links for operating said levers, and means associated with the carriage and cooperating with the track for operating said links to effect coupling of the carriage to the motor vehicle as the latter starts the carriage inwardly and for uncoupling the carriage from the motor vehicle as the carriage reaches the end of its outward movement.

14. In apparatus for operating garage doors, a tubular track having a longitudinal slot in its upper portion, a carriage adapted to be propelled inward and outward by a motor vehicle and com* prising a frame extending downward through said slot, said frame including a lower portion and an upper portion which latter is vertically adjustable in the former, means for securing said upper portion at any point of its adjustment, rollers adapted to travel upon the track and upon which the carriage frame is mounted, rollers mounted upon the frame and adapted to travel against the underside of the slotted portion of the track, an antifriction roller mounted upon the frame and adapted to be contacted by part of the motor vehicle, coupling means adapted to move to active position behind the contacting part of the motor vehicle to couple the carriage to the motor vehicle, and to idle position to uncouple the carriage from the motor vehicle, means mounted on the carriage and adapted to coact with the track in actuating said coupling means, and mechanism connecting the carriage to the doors for opening and closing the doors on movement of the carriage in either direction.

15. In apparatus of the character described, a track, a carriage arranged to traverse the track and be actuated by a motor vehicle, a pair of rollers adapted to pass behind part of the motor vehicle and couple the latter to the carriage, levers mounted on the carriage and upon which the coupling rollers are mounted, means mounted upon the carriage and coacting with the track to control said levers, and means connecting the carriage to the doors for opening and closing the latter on movement of the carriage.

16. A door operating apparatus comprising upper and lower pairs of reciprocating shuttles operably connected for simultaneous movement, mechanism connecting the door to said shuttles for opening the door on movement of the shuttles in one direction and for closing the door on the reverse movement of the shuttles, a carriage adapted to be propelled forward and backward by a motor vehicle, and means controlled by said carriage for moving the shuttles forward and backward to effect the opening and closing of the door on movement of the carriage in either direction.

17. In apparatus for operating a pair of doors, a reciprocatory cable, means for operating said cable, a pair of shuttles having adjacent grooved sides to provide a free passageway for said cable, means through which said shuttles control the doors, an element Xed to the cable and adapted to engage and reciprocate the shuttles, a pair of parallel slideways for guiding and holding the shuttles in engagement with said element, and means associated with said slideways for disengaging the shuttles from the element as the shuttles approach the end of their reciprocatory movements.

18. In apparatus for operating a pair of doors, a reciprocatory cable, means for operating said cable, a pair of shuttles having adjacent grooved sides to provide a free passageway for said cable, an element fixed to the cable and adapted to engage and reciprocate the shuttles, a pair of parallel longitudinally slotted slideways for guiding and holding the shuttles in engagement with said element, means associated with said slideways for disengaging the shuttles from the element as the shuttles approach the end of their reciprocatory movements, a cross-head reciprocably mounted in the slotted portions of the slideways and on which the shuttles are operably mounted, and means through which said crosshead operates the doors.

19. In apparatus for operating a pair of doors, a reciprocatory cable, means for operating said cable, a pair of shuttles having adjacent grooved sides to provide a free passageway for said cable,

an element xed to the cable and adapted to engage and reciprocate the shuttles, a. pair of parallel slideways for guiding and holding the shuttles in engagement with said element, means associated with said slideways for disengaging the shuttles from the element as the doors reach their open and closed positions, a reciprocatory crosshead associated with the slideways, means through which said cross-head operates the doors, crank shafts operably mounted in the cross-head and upon which the respective shuttles are fixed, and spring means yieldably connecting said crank-shafts.

20. In apparatus for operating a pair of doors, a reciprocatory cable, means for operating said cable, guide means for the cable, a pair of shuttles having adjacent grooved sides to provide a free passageway for said cable, means through which said shuttles control the doors, an element fixed to the cable and adapted to engage and reciprocate the shuttles, a pair of parallel slideways for guiding and holding the shuttles in engagement with said element during a portion of its movement, and wedge members associated with said slideways for disengaging the shuttles from the element as the shuttles approach the end of their reciprocatory movements.

2l. In apparatus for operating a pair of garage doors, a reciprocatory cable, means for operating said cable, two pairs of reciprocatory shuttles each pair having grooved sides for free passage of said cable, means for guiding the cable to the grooves, two shafts arranged side by side, each having one of each pair of shuttles Xed thereon for simultaneous movement, a cross-head in which said shafts are operably mounted, means through which said cross-head operates the doors, oppositely disposed recesses in each pair of shuttles communicating with the respective grooves, an element fixed to the cable and adapted to successively enter each pair of recesses during the travel of the cable to move the shuttles therewith, means for guiding the shuttles and holding their recessed portions in engagement with said element, and means for disengaging the shuttles from the element as the doors reach their open and closed positions.

22. In apparatus for operating a pair of garage doors, a reciprocatory cable, a carriage adapted to be actuated by a motor vehicle and to which the cable is attached, two pairs of reciprocatory shuttles each pair having grooved sides for free passage of said cable, sheaves for guiding the cable from the carriage to the grooves, two shafts arranged side by side, each having one of each pair of shuttles fixed thereon for simultaneous movement, a cross-head in which said shafts are operably mounted, means through which said cross-head operates the doors, oppositely disposed recesses in each pair of shuttles communicating with the respective grooves, an element fixed to the cable and adapted to successively enter each pair of recesses during the travel of the cable to move the shuttles therewith, means for guiding the shuttles and holding their recessed portions in engagement with said element, and wedge members for disengaging the shuttles from the element as the doors reach their open and closed positions.

WILLIE L. ROBERTS.