US1222136A - Electrically-operated door. - Google Patents

Description

J. C. REYNOLDS.

JELECTRICALLY OPERATED DOOR.

APPLICATION FILED IIILY Io, 1913.

1,222,136. Patented Apr. 10,1917.

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ELECTRICALLY OPERATED DOOR.

APPLICATION man JULY lo. |913.

1,222, 1 36. Patented Apr. 1o, 1917.

Patented Apr. 10, 1917.

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l. C. REYNOLDS.

ELECTRICALLY OPERATED DOOR.

APPLICATION mio mu lo. 1913.

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J. C. REYNOLDS. ELECTRICALLY OPERTED DOOR.

APPLICATION FILED JuLYlo, 1913.

Patented Apr. 10, 1917.

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JOHN C. REYNQLDS, 0F BINGHAMTON, NEW' YORK.

ELECTBCALLY-OPERATED DOOR.

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Application 'tiled July 10, 1913.

To all whom t may concern:

Be it known thatl, JOHN C. REYNOLDS, a. citizen of the United States, residing at Binghamton, in the county of Broome and State of New York, have invented certain new and useful improvements in Electrically-Operated Doors; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

rihis invention relates to new and useful improvements in electrical devices :tor opening and closing garage doors, stable doors, and all other similar structures of such size or weight that it is dii'iicult to operate them manually.

rlhe principal object of this invention resides in the provision of a device of the character .above described, which may be operated interiorly or enteriorly or" the garage by merely pressing a button switch.

fi. still further object is to provide an operative connection between a motor and a swinging or sliding door and to interpose in the electrical circuit controlling` the motor an automatic motor control which will operate to automatically shut off the motor and to simultaneously apply a band brake to he driven shaft of the motor at the moment the doors reach the desired open position.y

An object of equal importance with the foregoing, is to provide an electrically controlled reversing switch which will operate to reverse the direction of the flow of current through the motor armature consequently reversing the direction of rotation of the driven shaft of the motor and permitting the return oie the doors to closed position. rlhe above and additional objects are accomplished by such means as are illustrated in the accompanyingv drawings, described in the following specification, and hen more particularly pointed out in the claims which are appended hereto and '.orm a part of this application.

l?? ith reference to the drawings, wherein l have illustrated the prerperred embodiment of my invention as it is reduced to practice, and throughout the several views of which similar reference numerals designate corresponding parts;

Figure l is a front elevation of a. pair Specification of Letters Patent.

Patented Apr. 10, 1917.

serial no. 778,404.

of swinging doors equipped with the operating mechanism of this invention,

'Fig'. 2 is a detail side elevation of the door operating mechanism,

lligt is a top plan view of a part of the operating mechanism and controlling means,

Fig. i is a front elevation illustrating the means employed in opening and closing sliding doors when the electrical device of this i vention is applied to doors of this type,

Fig. 5 is a front elevation of the motor brake and motor control in operative assembled relation,

. Fig. 6 is a detail viewv in side elevation of the motor control,

Fig. 7 is a top plan view of the motor control,

Fig. 8 is a detail view in side elevation of the motor brake,

Fig. 9 is a diagrammatic View of the wiring system with the reversing switch interposed in the wiring system illustrated in detail in order that the operation of the switch may bevclearly understood, and,

Fig. l() is a detail sectional view of one of the motor control elements taken on line 10H10 of Fig. 7,

` Fig. il is a vertical sectional view through the structure illustrated inFig. 9.

Proceeding now to the description of the drawing, this inventionconsists essentially in two main cooperating elements: iirst the door operating mechanism which is operably connected to and controlled by an electrical actuating mechanism, and second the electrical actuating mechanism itself. lalring up these elements in the order named, the door operating mechanism, the preferred embodimentof which is illustrated particularly in Figs. l, 2 and 3, includes a pair of vertically arrangedoperating rods l and 2 which are respectively journaled in bearing plates a and fand 6k and 7, and are operatively connected to a pair of swinging doors 8 and'9, by the links 10 and l1, which are preferably formed of resilient strap metal and are secured at their one terminal to the doors, as at i2, and rat their other terminal to collars 13 adjustably mounted on the rods l and 2 and held in adjusted position thereon by set screws 14. To the upper terminal of the rods l and 2 are secured a pair of sector beveled gears l5 and 16, respectively. These gears are formed with terminal collars 17 and are held in adjusted position on the rods 1 and 2 by set screws 18. A pair of sprocket wheels 19 and 20 are respectively keyed on stub shafts 21 and 22, which are journaled in hanger brackets 23 and 24, bolted or otherwise secured, as at 25, to the ceiling of the building. These sprockets 19 and 20 are connected by a drive chain 26 and are operatively connected to a motor, diagrammatically indicated at 27, by a chain or belt 28. A pair of beveled gears, one of which is indicated at 29 in Fig. 3, are secured terminally of the stub shafts 21 and 22 and are respectively arranged to mesh with the beveled sector gears 15 and 16.

As regards the operation of the mechanism above described, it will be obvious that upon actuation of the chain or belt 28 by the motor 27 when this latter is thrown into circuit with the electrical power source, that the sector gears 15 and 16 will move through an arc of 900, consequently swinging the doors 8 and 9 on their hinges through arcs of similar degree to that described by the members 15 and 16.

Coming now to the description of the electrical means employed in closing the electrical circuit through the motor and for automatically breaking this circuit and applying the brake to the motor, this feat-ure of the invention as best illustrated in Fig. 5, in-

cludes a motor, a brake, and an automatic motor control, respectively designated by the numerals 27, 30 and 31.

The motor may be of any desired type and, of course, forms no feature of this invention and it is therefore not described in detail. The members 27, 30 and 31 are in practice mounted on a shelf or other suitable support, indicated at 32.

rThe motor brake of this invention, illustrated in detail in Fig. 8, includes a brake lever 33 formed with a substantially semicircular terminal portion 34, the free end of which is pivotally secured, as at 35, to a supporting bracket or standard 36. The inner edge of the brake band 34 is lined with any suitable fabric for an obvious purpose. A friction drum 37 is keyed on the driven shaft of the motor and is arranged for engagement by the brake band 34 except when the door is being opened or closed. The pressure on the brake band 34 is produced by a block weight 39 which is slidable on the brake lever 33 and is held in adjusted position thereon by a set screw 40. As a means for throwing the brake band 34 out of frictional engagement with the brake drum 37 while the door is being opened or closed this invention employs a solenoid or electro-magnet 41. An armature 42 is pivotally connected to a lever 43 which is fulcrumed, as at 44, on a supporting standard 45 and is terminally attached by a pivot 46 to the lever arm 33. In practice the magnet 41 is automatically and simultaneously energized as soon as the motor has started and by drawing the armature 42 downwardly, the magnet operates to disengage the brake band 34 from the drum 37, thus permitting the motor to run freely. This magnet 41 is also adapted to be automatically de'c'nergized at the moment the doors reach open position.

The means employed in throwing the m0- tor into the electric power source circuit and for automatically operating the brake in the manner above disclosed, is best illustrated in Fig. 9. Referring therefore particularly to this figure, there has been provided a reversing switch, designated as an entirety by the numeral 46. rlhis reversing switch includes a contact arm 47 which is pivoted, as at 48, in a suitable frame and is provided at its upper and lower portions with balance weights 49 and 50, which are longitudinally adjustable and may be held in position by set screws. The lower portion 45, of the contact arm 47, is essentially a single length or strip of metal, preferably copper, while the upper portion consists of two strips of copper 52 and 53, which extend in parallel spaced relation to each other and are connected at their lower terminals slightly above the pivot point 48. In the lower portion of the frame are arranged the spring contacts 54, 55, 56 and 57. These spring contacts 54, 55, 56 and 57, are formed of two strips of copper mounted in parallel spaced relation to each other and are adapted to receive between their adjacent faces, the portion 45 of the contact arm 47. These contacts form in connection with the portion 45 of the Contact arm 47, what is essentially a knife switch. 1n this connection it is to be noted that any other type of contact may be employed without affecting' the spirit of this invention. ln the upper portion of the frame in which the Contact arm 47 is mounted, are arranged two sets of contacts similar to the members 54, 55, 56 and 57 in the lower portion of said frame, one set of which members is designated by the numerals 60, 61 and 62 while the other set comprises the element designated by the numerals 63, 64 and 65. In each instance these individual switch contacts consist of two strips of metal arranged in parallel spaced relation to each other and insulated from each other.

The weight 50 is, in practice, normally secured near the lowermost end of the contact arm above the portion 45 and it will therefore be apparent that the contact arm 47 is normally held in vertical position. In order therefore to swing the contact arm 47 clockwise or counter-clockwise as the case may demand, there has been provided a link 67, which is pivoted to the Contact arm 47 immediately below the pivot point 48. A

pair of sliding core solenoids 68 and 69 are mounted in the frame and are provided with the usual soft iron cores 70 and 71, respectively. These cores 70 and 71 are connected to the terminals of the link 67 by pivoted links 72 and 73. When the member 47 is in normal vertical position the cores 70 and 71 are each withdrawn half way from the members 68 and 69, respectively, as will be readily observed by reference to Fig. 9.

Taking up as next in order the wiring system employed in connecting the members 58 and 59 to the motor 27 and to the brake solenoid 41, it will be observed by reference to Fig. 9, that the binding posts 74 and 75 of the motor 27 are connected by lead wires 76 and 77, to a pair of binding posts 78 and 79 which are secured to the frame in which the member 47 is arranged. The binding posts 80 and 81 of the brake solenoid 41 are respectively connected by lead wires 82 and 83 to a pair of binding posts 84 and 85, which are also mounted in the frame referred to above. Wires 86 and 87 respectively connect the corresponding contact strips of the members 60 and 63 and are in turn respectively connected to the binding posts 84 and by wires 88 and 89. The corresponding elements of the members 61 and 64 are connected by wires 90 and 91. The current entering the two contact strips of the member 64 through the respective wires 90 and 91 is conducted to the binding posts 78 and 79, by wires 92 and 93. The wires 94 and 95 connect the corresponding contact strips 62 and 65 and are in turn respectively connected to the main line wires 96 and 97 by wires 98 and 99. An ordinary knife switch 100 is interposed in the main line circuit wires 96 and 97 for the obvious purpose or' completely breaking the circuit from the power source.

By swinging the member 47 in the position indicated by dotted lines at 101 in Fig. 9, the circuit is closed between each of the pairs of contact strips of the members 60, 61 and 62. Tracing the circuit thus closed, it will be observed that the current flowing from the electrical power source through the wire 96 passes, through a binding post 102, through the wires 98 and 95, through the one contact strip of the member 62, through the member 52, through the one strip of the member 61, thence through the wire 90 to one strip of the member 64, and then passes out thro-ugh the wire 92 to the binding post 78 from whence it is conducted by the wire 76 to the binding post 75 of the motor. The current flows through the motor and returns through the wire 77, binding post 79, wire 93, through the other element of the member 64, thence through the wire 91, through the other element of the member 61, through the member 53, to the other element of the member 62, and then through the wire 94 to the wire 99 from which it passes into the main line wire 97 The circuit through the motor is then completed when the contact arm 47 is swung into the position indicated by dotted lines at 101 in Fig. 9. Simultaneously with the closing of the circuit through the motor, the circuit through the brake solenoid 41 is closed with the result that the brake band is moved out of engagement with the brake drum in the manner previously described. The circuit from the main line wires 96 and 97 to the binding posts 80 and 81 of the solenoid 41 is traced through the wires 82 and 83 to the binding posts 84 and 85 and from these members through the wires 88 and 89 to the wires 86 and 87, which are respectively connected to the two contact strips of the member 60. As above stated, the circuit between the contact strips of the. member 60 is completed by the members 52 and 53. Tt will be observed by reference to the wiring system above described, that when the contact arm 47 is swung clockwise to assume the position indicated by dotted lines at 102 in Fig. 9, the current will be reversed through the armature of the motor. This arrangement is, of course, necessary in order that the direction of 'rotation of the motor shaft may be reversed after the doors have been opened and it is desired to return them tol closed position.

As a means for swinging the contact arm 47, which is normally in vertical position as above stated, clockwise or counter-clockwise, there has been provided the solenoids 68 and 69. lhen the operator desires to open the doors, the magnet 69 is energized to draw the core 71 into the solenoid so that the member 47 will be swung on itsv pivotal point 48, with the resultant movement of the members 52 and 53 into contact with the contact strips of the members 60, 61 and 62. The circuit through the solenoid 69 is closed at the will of the operator by an ordinary button switch 103. The circuit through the magnet 69 which is closed upon the manipulation of the button switch 103 may be traced from the power source to the line wire 96, through the line wire 106, binding post 105, wire 104, through the button 103, thence back to the power source through the wire 107, binding post 108, wire 109, contact 56, wire 110, through the coil of the member 69, and thence through the line wire 97 to the power source.

lt will be apparent that when the button switch 103 is manipulated to swing the contact arm 47 into the position indicated at 101, the motor 27 will be started, the brake solenoid 41 energized with the consequent release of the brake band and the door will swing into open position in the manner above described. It is, of course, desirable that automatic means be provided to shut 0H the current and apply the brake to the driven shaft of the motor j ust previously to the moment that the door arrives at complete open position.

The means employed in this connection is a motor control designated in Fig. 9 as an entirety by the numeral 111. rthis mechanism will be hereinafter described in detail. As regards its connection in the electrical circuit, it is only necessary to set forth that the contact arm 112 of the motor control is positively operated by the driven shaft of the motor and is designed to complete the circuit through the magnet 68 at the moment the door reaches open position and is also designed to energize the magnet 69 at the moment the door reaches closed position.

It will therefore be apparent from the foregoing that when the contact arm 47 is in the position indicated at 101, the portion 51 of the contact member 47 completes the circuit between the members 54 and 55. The member 54 is connected by a wire 118 to one terminal of the coil of the member 68 and the contact 55 is connected by the wire 114 to a lower spring Contact 115 of the motor control 111. A second fixed contact 116 is provided in the motor control and is arranged immediately above. the spring contact 115, being connected to the line wire 96 by a wire 117. When the door is in closed position and the member 112 is in engagement with a pair of fixed contacts 118 and 119, similar to the members 115 and 116 but arranged on the opposite side or' the motor control frame, it will be apparent that the circuit will be completed through the line wire 96, spring 119, contact 112, spring 118, wire 126, spring 56, wire110 through the solenoid 69 and back to the other line wire 97, thus completing the circuit and swinging the reversing switch into position to open the door and simultaneously permitting the arm 47 to swing to its neutral position and breaking all circuits. Just at the moment that the door reaches its open position the driven shaft of the motor will swing the member 112 from engagement with the spring contacts 118 and 119 into engagement with the spring contacts 115 and 116. As the contact 112 engages the spring contacts 115 and 1.16 the circuit is closed through the magnet 68. rihis circuit'may be traced through the line wire 96, through the wire 117, spring contacts 116, 112 and 115, thence through the wire 114 to the contact 55, thence through the blade or lower portion 51 of the contact arm 47, through the contact 54, and wire 113 to the coil of the member 68, through which it passes into the wire 120 to a binding post 121 connected to the return line wire 97.

In practice, the coils of the magnets 68 and 69 are of suilicient strength to swing the contact arm 47 into the dotted line positions, against the gravity pull of the weight 50. When either of the magnets is energized to draw its core inwardly with the resultant swing of the member 51, the contact arm 47 is barely 'balanced so that the denergization of the magnet will operate to swing the member 47downwardly again. It will be obvious that inasmuch as the weight 50 normally tends to hold the member 47 in vertical position and inasmuch as the magnets 68 and 69 are of equal strength, the energization of both magnets will tend to balance the member 47 in normal vertical position.

1t of course obvious that when the contact 112 of the mot-or control closes the circuit through the spring contacts 115 and 116 and the magnet 68 is energized, the contact -arm 47 will swing into normal vertical position, thus breaking the circuit through the brake solenoid 41, and simutaueously shutting ott the power from the motor and automatically applying the brake to the driven shaft.

lllhen the operator desires to return the door to closed position, it is only necessary to manipulate a button switch 122, closing the circuit through the magnet 68 and swinging the contact arm 47 into the position indicated in dotted lines at 102 in Fig. 9. In this position the members 52 and 58 oi the contact arm 47 complete the circuit between the contact strips ot the members 68, 64 and 65, consequently reversing the circuit through the motor 27 and energizing the magnet 41 so that the brake is released and the motor is allowed to run free in the opposite direction from its previous direction of rotation during the opening of the door. Then the contact arm 47 is swung into engagement with the members 63, 64 and 65, it simultaneously engages the spring contacts 56 and 57 so that when the door has reached approximate closed gosition and the motor has swung the contact 112 back into engagement with the spring contacts 118 and 119, the circuit is completed through the solenoid v69 with the consequent movement of the contact arm 47 until the circuit is broken by the disengagement of the metallic strip 45 with the contacts 56 and 57 at which time the arm will gravitat-e to normal vertical position. As before, when the member 47 is swung back into normal vertical position, the circuit is broken through the motor and brake solenoid so that the motor is brought to a stop when the door reaches complete closed position.

The circuit completed through the solenoid 68 when the push button 122 is manipulated may be traced :trom the line wire 96, through the wire 106, binding post 105, wire 104, through the button 122, and thence back to the power source through a wire 128, binding post 124, wire 125, through the contact 54, from the contact 54 through the wire 118 to the solenoid 68, through the coil of the solenoid 68 into the wire 120, and thence to the binding post 121 through the return wire 97. The circuit closed through the solenoid 69 of the arm 112 when this latter engages the spring contacts 118 and 119 at the moment of the closing of the door, may be traced from the line wire 96, through the spring contacts 119, 112 and 118, thence through a wire 126 to the spring contact 57, through the blade 51 to the spring contact 56, and thence through the wire 110 to the solenoid 69 to the return line wire 97.

Taking up the wiring system and the operation of the device being thus disclosed, the detailed structure of the motor control 111 is taken up as next in order. This element of the invention as best illustrated in Figs. 5, 6 and 7, includes a base block 127, which is mounted on the shelf 32 and carries at one end a pair of standards 128. 1n the upper terminals of these standards 128 is journaled the driven shaft- 38 of the motor, the portion of which comprehended between the standards 128 and 129, is formed with a worm screw, as at 129. r1`his worm screw is mounted to mesh with a gear wheel 130 which is keyed on the shaft 131 journaled in a pair of spaced bearing standards 132 and 133. A washer or any other suitable type of spacer block may be placed on the shaft 131 between the upper terminals of the members 132 and 133, as at 134. An additional spacing collar or washer 135 is mounted on the shaft 131 between the standards and is interposed between the gear wheel 130 and the member 133. On the shaft 131 are loosely journaled a pair of 'disks 136 and 137 which are formed of vulcanized rubber or any other suitable means of insulating material. A pair of longitudinally arranged slats 138 and 139 connect the members 136 and 137 and are so arranged as to engage the transverse bar 131. A pair of stub pins 130 and 141, respectively, are carried by a pair of collars 142 and 143, which are .fixed in adjusted position on the shaft 131 in any suitable manner. 1n practice, these pins 140 and 141 are quadrantly spaced and are designed to alternately engage the transverse bar 131 when the motor shaft is rotated during the opening or closing of the door. On the lower portion of the disk 136 are arranged a pair of segmental insulating members, as at 144, which are secured in any desired manner to the member 136.

As best illustrated in Fig. 9, the contact arm 112 which consists essentially of a strip of copper or brass, is mounted with its upper terminal clamped between a pair of the members 144. The spring contacts 118, 119, 115 and 116 are clamped between strips of insulating material, as at 145. r1`hese members 145 may be of any desired number and are bolted or otherwise secured to the member 127, as at 146. The spring contacts 115, 116, 118 and 119 each consists of a pair of metallic strips, as indicated in Fig. 5. The inner terminals of these strips are oppositely offset to insure the movement of the contact 112 into engagement with their adjacent faces.

The ratio of the gear wheel 130 is proportioned to the worm 129 in such manner that the arm 112 will swing from engagement with the members 118 and 119 into engagement with the members 115 and 116 or vice versa, during each complete movement of thedoor from open to closed or closed to open position.

llhile this invention has been designed with particular reference to the operation of swinging doors, it may nevertheless be as readily applied to the ordinary sliding door such as is commonly employed in many barns, garages, and other similar buildings. 1n order to emphasize the ease with which this invention may be applied to a sliding door, there has been illustrated in Fig. 4, a pair of sliding doors 148 and 149 which are mounted in the door casing in the usual manner. A pair of gear wheels 150 and 151 are arranged at each side of the door casing and are operatively connected by a chain 152. A similar chain indicated at 153 connects the gear wheel 151 with the driven shaft of the motor. A bracket indicated at 154, is secured at its lower terminal to the upper edge of the door 148 by bolts or other suitable fastening devices, and is attached at its upper terminal to the chain 152 and to the upper strand thereof. The door 149 is secured to the lower strand of the chain by a somewhat similar bracket 155.

From the foregoing it will be apparent that upon the rotation of the gear wheel 151 the motion will be communicated to the doors 148 and 149 by the chain 152, drawing the doors inwardly into their respective casings.

1t will be apparent that when it is desired to open the doors the only operation necessary is to press the button 103 which will complete the circuit from the wire 96 through the wire 106, the contact 105, the wire 104, push button 103, wire 107, contact 108, wire 109, spring 56, wire 110, solenoid 69, and thence to the line wire 97, which will energize the solenoid 69 and cause the member 47 to assume the position 101 indicated by the dotted lines. As soon as the member 47 reaches the position 101 it will be evident that another circuit will be completed from the line wire 96 through 84, through wire 82 to the brake solenoid and the field winding of the motor, from whence it passes through the wire 83 binding post 85, wires 89 and 87'toi the coperating member of the contact 60, from whence it passes through the copper strip 53 carried by the member 47, back to the cooperating member of the contact 62 and through the wires 94 and 99 back to the line wire 97. At the same instant that the solenoid 41 is energized part of the circuit passing through the strips 52 and 53 passes into the contacts of the element 61 the positive pole of the said circuit passing through the wires 91 and 93 to the binding post 79 through wire 77 to the binding post 74 of the motor from whence it passes through the armature of the motor to the binding post 75, through the wire 7 6, to the binding post 78, through wires 92 and 90 back to the second element of the contact member 61 from which it passes back to the line wire 97 lby means of the connections coperating with the member 47. Thus it will be seen that the motor will be set in operation and the motion set up by the said motor will be transmitted to the door driving mechanism thereby causing the doors to swing open. At the instant that the motor is set in operation the end of the member 47 opposite the members 52 and 53 forms a contact between the members 54 and 55 which when one of the push buttons 122 is pressed completes a circuit through the solenoids 68 in a manner to be more fully hereinafter described. The said circuit passes from the line wire 97 through the binding post 121, the wire 120, solenoid 68, wire 110, spring 54, blade 51 of the member 47, spring 55, wire 114 and spring 115. When the door has reached its full length of travel the worm on the motor shaft will have caused the contact 112 to be swung out of engagement with the springs 118 and 119 and into engagement with the springs 115 and 116 thus putting the circuit into condition to be completed by the blade 51 by contacting with the springs 54 and 55 to cause the door to return to its opposite position upon the next operation of the push buttons. Through the operation of the motor it is evident that the shaft 131 carrying the sprocket wheel to which the chain 28 is operatively connected will rotate and cause the sprocket wheels 19 to revolve the shafts 21 and 22, thus causing the beveled gears 29 to operate the segmental gears 15 and 16 and swing the doors into their open or closed position such as the case might be.

In reduction to practice, I have found that the form of my invention illustrated in the drawings and referred to in the above description as the preferred embodiment, is the most efficient and practical; yet realizing that the conditions concurrent with the adoption of my device will necessarily vary, desire to emphasize the fact that various minor changes in details of construction, proportion, and arrangement of parts, may be resorted to when required, without sacrificing any of the advantages of my invention, as deiined in the appended claims,

Having thus described my invention, I claim 1. The combination with a door, of an being adapted to close a circuit through the electrical means automatically and simultaneously with the movement of the door into open position, said electrical switch operating means being adapted to move the said switch into neutral position when the circuit through it is closed, and electrical means adapted to move the said switch in the reverse position for reversing the direction of the current through the motor when .the door is to be swung from closed to open position.

, 2. The combination with a door having an electrically operated mechanism for opening and closing said door, said mechanism including a motor, means to operatively connect the motor to the door, a reversing switch interposed in the motor circuit, electrical means for controlling the reversing switch, a motor control device connected to the shaft of the motor, andoperated thereby, said motor control device being adapted to control the operation of the electrical switch closing means to cause the same to be thrown into position to operate the motor in opposite directions, and electrical means independent of the first mentioned electrical means and controlled by the operator whereby the reversing switch may be manually controlled.

3. The combination with a door, of an electrically operated mechanism for opening and closing said door, said mechanism including a motor, a reversing switch interposed in the motor circuit, said reversing switch having a pivoted contact arm, contacting plates secured to one end of the contact arm and adapted to coperate with a plurality of spring contacts carried by the frame of the switch, a single contact plate carried by the opposite end of the contact arm, a plurality of contacts carried by the frame of the switch and adapted to coperate with the last mentioned single contact, means connecting the first mentioned plurality of contacts with a suitable source of power supply, and with the motor, a brake mechanism operatively connected with the shaft oli the motor and controlled by one set of the first mentioned contacts, a motor control mechanism operated by the contact and means to swing the arm on its pivot to the desired position and thereby complete the circuit through the motor.

l. The combination with a door, of an electrically operated mechanism therefor, said mechanism including a motor, a reversing switch interposed in the motor circuit, said reversing switch comprising a trame, a plurality of contacts at one end of said trame.) a plurality or" contacts at the opposite end of said frame, an arm pivotally mounted in the frame, contacting plates carried by one end of the arm and adapted to cooperate with the rst mentioned contacts in the iframe, a single contact formed on the opposite end of the arm and adapted to coperate with the second mentioned con` tact, a solenoid carried by the frame and operatively connected with the arm whereby the same may be swung into its several positions, and means connected to the second 5. The combination with a door, of an electrically operated mechanism for controlling the movement of the door said iechanism including a motor, a motor brake operatively connected with the motor, a solenoid for controlling the operation of the motor brake, an automatic reversing switch interposed in the motor circuit and adapted to control the operation of the motor and the solenoid, simultaneously, a pair of solenoids controlling the operation of the reversing switch, and means controlled by the operation. orn the motor1 and mechanically connected thereto tor throwing the reversing switch automatically into the desired position.

ln testimony whereof l aiiix my signature in presence of two witnesses.

JOHN C. REYNOLDS. Witnesses:

CHAs. W. REYNOLDS, EDA ANDREWS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G.

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