US1716707A

US1716707A - Door-operating device

Info

Publication number: US1716707A
Application number: US160885A
Authority: US
Inventors: Louis F Schoelkopf
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-01-13
Filing date: 1927-01-13
Publication date: 1929-06-11
Anticipated expiration: 1946-06-11

Description

June 11, l929- L.. F. scHQELKoPF DOOR OPERATING DEVICE sv Smets-sneek INVENTOR.

A TTORNEYS June l1, 1929.

' L. F. SCHOELKOPF DOOR OPERATING DEVICE Filed Jan. 13, 1927 5 Sheets-Sheet vll/(Av1.

6 IN VEN TOR.

TORNEYS June l1,` 1929. L. Fl scHoELKoPF 1.716.707

DOOR OPERATING DEVICE Filed Jan. 13, 1927 3 Sheets-Sheet 3 IN VEN TOR.

BY www@ A TTORNEYS.

Patented June 11, 1929.

i UiTEn STATES LOUIS` F. SCH'OEIVKOPF, OF MADISON, WISCONSIN.

DOOR-OPERATING DEVICE.

Application led January 13, 1927. Serial No. 160,885.

This invention relates to improvements in door operating devices.

It is one of the objects of the present invention to provide a door operating device having a remote control which may be easily operated to open or close the doors..

A further object of the invention is to provide a door operating device which is ac- 'tuated pneumatically and mechanically, and is controlled electrically fiomvone or more remote points.

A further object of the invention isto provide a door operating device in which approximately one-half of the door opening or closing operation is actuated by means of compressed air, while the remaining hall' or the operation. is actuated by a .spring means which is initially put under tension by the compressed air. s

A further object of the invention is to provide a door operating. device which, while operating to open or close the door automatically, does not prevent the manual opening or closing of the door when desired.

A further object of the invention is to provide a door operating device 'with an oil check to cushion the opening and closingr of the door and to prevent the door slamming.

A further object of the invention is to provide a door operating device in which the air control mechanism, electromagnets, etc., are located in the base portion of the device instead of forming a separate unit.

A further objectof the invention is to provide a door operating device which may be used for other purposes than for opening and closingdoors.

A further object of the invention is to provide a door operating device which is of simple constrifction, is strong and durable and is well adapted for the purpose described.

Vith the above and other objects in view, the invention consists of the improved door operating device and its parts and combinations as setforth in the claims, and all equivalcuts thereof. y

In the accompanying drawings, in which the same reference characters indicate the saine parts in kall of the views:

Fig. 1 is a top view of a pair of door operating devices shown rconnectedto a pair of hinged doors andthe door frame, the view Fig. 3 is a horizontal sectional view ofV one of the devices and a door on a larger scale, the door being shown in closed position;

Fig. 4 is a horizontal sectional view'similar to Fig. 3, with the door swung to a halfopen position;

Fig. 5 is a top detail view of a portion of one ofthe devices, parts being shown in section to illustrate interior construction;

Fig. 6 is a vertical sectional view taken on line 6-6 of Fig. 5;

Fig. 7 is a vertical sectional detail view on a larger scale taken on line 7 7 of Fig. G;

Fig. 8 is a sectional detail view of the bell crank lever pivotal connection; and

Fig. 9 is a sectional detail view of the oil cylinder and piston.

Referring to the drawings, the numeral 8 indicates a door frame having two inwardly swinging hinged doors 9 of ordinary construction. The improved operating devices l() are mounted on the door frame above the doors and have parts connected to the doors, and as both devices are similar in construction except that parts aie reversed to `form right and left hand openers, a descriptionl of one opener will su'liice. Each device comprises an angular bracket or main frame 11 having elongated slots 11 and bolts 12 for adjustably mounting the bracket frame 11 upon the door frame 8. A twopart lever arm 13 pivotally connected at its inner end to the bracket frame extends outwardly therefrom, and at its outer end is pivotally connected to the outer end of a two-part link 14, and the inner end `of said link is pivotally connected to a bracket member 15 which is bolted to the door 9. The outer endiportion of the lever arm 13 is formed wit i an arm 1G projecting approximately at .rightangles therefrom, and to the outer end of this arm a piston rod 17 is pivotally connected. The inner end of then piston rod carries a piston 18 which recipro- 'cates in a cylinder 19 alinedy with the rod 17,

and said cylinder at its inner end is pivotally connected to the bracket frame 11 bya tubu-v lar pivot sleeve 20. The two parts ofthe Cil lever arm 13 are adjustably connected together by the bolt and slotted connection 21, while the two parts ot the link 14k are adjustably connected togetherI by the bolt and aperture connection 22 to tit doors which vary in swing and position.

The tubular sleeve 2O is connected to a valved air supply tube 23 and the pivot sleeve 2O is provided with a transverse air port2f-1 extending from the bore of` the sleeve to the end oit the cylinder to supply air under pressure thereto from the supply of the sleeve Q0 at its intersection with the ports 2st and engages the'valve seat 2G to close oit the air to the cylinder, and a coiled spring QT yieldingly holds the valve up to its seat, and the lower end of the spring bears upon one end portion of a bell crank lever 28 which is pivotally` connected to vthe bracket frame 11. The tubular sleeve 2.0 is also provided with another valve seat 2.1) engaged by the ball valve 25 to close olii the exhaust portion Q0 of the sleeve while air is being admitted to the cylinder 19. This second valve seat is formed by a removable inner sleeve 30 extending into the bore of the tubular sleeve 20. As thus arranged, and when the bell crank lever is swung downwardly to release pressure on the coiled spring, the pressure of the air will move the ball valve downwardly to the seat Q9 and close the exhaust bore while air is admitted into the cylinder, and as soon as the bell crank lever is moved upwardly to increase the pressure on the spring, the ball valve will be moved upwardly to its other seat to close the supply and open the exhaust to the cylinder.

r1`he other arm 31 of the bell crank lever 28 is Yformed with a socket into which extends the end portion of a screw or bolt to form a loose connection therebetween. The screw is carried by one end portion oi? an angular link 34 which at its opposite end is pivotally connected to the medial portion of a trip lever The socket end portion ot the bell crank lever 28 extends into a U-shaped or recessed end portion 34; of the link 3a to prevent the lever from disengaging the end of the screw 33 while maintaining the parts loosely connected to prevent the parts binding in turning. r1`he opposite end ot the trip lever 35 is arranged to snap under the edge ot the armature 3G ot an electromagnet 37 mounted on ythe frame 11. The electromagnet is controlled by a remotely positioned switch 38 connected to a battery 39 by wires 40. The trip lever 35 is normally held in engagement with the edge of the armature, as clearly shown in Figs. 5 and 6, and when in said position tension is placed upon the spring 27 to cause it to close' the valve 25 against the pressure of the air. Then the magnet armature releases 'the trip lever, the coiled spring 27 will torce said lever to the position shown in Fig. 3.

A spring 41 connected to the magnets, and extending around the armature, limits the outward swing of said armatore.

To retard the outward swing of the trip lever 35 and to prevent rebound, a screw 492 extends through the main frame 11 and is threaded through a medial portion 35 ot the trip lever, and the head ft2 of the screw is clamped in adjusted position by a plate L13 engaged by a clamping screw 11. rilho plate engages the head and when the screw is tightened the screw will be maintained in adjusted position. In adjusting the screw 112, the side portion ot the lever drawn close to the side ol the trame so that as the screw, serves as the tdcrum of the lever, the upward swing of the lever will cause the lever to move laterally by the thread and bind against the side ot the trame and thus prevent rebound and stop the outward movement oit the lever. 1n moving inwardly or to armature engaging position, the thread will cause the lever to move away from the side portion of the -frame and be free to s ving inwardly to ar mature engaging position. By adjusting the screw ft2 to position the trip lever nearer to or farther from the side portion ot the frame, the trip lever may be retarded Vand stopped at any desired point.

The compressed air when a'dmitted'to the cylinder will force the lever 13 and the link 14 outwardly and swing the door from a closed position to a halt-open position or from an open position to a haltsclosed position, while another means now about to be explained completes the opening or closing movement.

A bell crank lever positioned alongside of and tulcrumed on the'hnb ot' the lever arm 13 which surrounds the pin 46, is

formed with a long arm 15 and a short arm 4:7. The long arm 45 extends towards the trip lever 35 and at its inner end is provided with a projecting pin L1&5 which is pivotally connected by a link 119 to the trip lever 255, so that when the lever arm 13 is swung outwardly, the trip lever will be swung inw wardly to engage the inner edge ot' the armature 36, as shown in Fig. 5. The formation of the pivotal connection between the pin L18 and the link 49 is in the form of a slot and pin connection `to permit indei'iendent inward movement of the bell crank lever t To provide for adjusting the period of return of the trip lever to armature engaging position, a small bell crank lever 50 is pivotally mounted on the hub of the lever arm 13 between the lever arm 13 and the bell crank lever 4:5, and is formed with an angular portion which projects inthe vpath of movement oi the short arm` 47 of the lever 45. This bell crank lever 50 is formed with a segmental slot 51 for receiving a bolt 52 ywhich extends through the slot and is threaded into the lever arm 13 to adjustably connect the said small bell cranklever 50 to said lever arm. As thus arranged the trip lever 34 may be swung inwardly to engage the inner edge of the armature at any point ot' the movement of the lever arm 13 by clamping the small bell crank lever 50 to the `said lever arm 13 at the point desired.

As before mentioned, compressed air in the cylinder 19 will swing the door to slightly less than half open or haltI closed position, and the momentum of the movement will swung the door over the dead center line, and in order to complete the opening or closing operation, a cylinder 53 pivotally connected at its inner end to the frame 11 by the pivot pin 54 extends outwardly therefrom, and carries a tubular piston rod 55 which is pivotally connected at its outer end to part 16 of the lever arm 13 by pivot pins 56, as clearly shown in Fig. 1. A piston 57 positioned within the cylinder 53 and surrounding the inner headed end 58 of the piston rod 55 has al loose connection with said rod. The headed end 58 lits into the sleeve portion 57 of the piston and is formed with hexagonal sidesl to provide spaces between the head and the sleeve oi the piston, and the sleeve portion is provided with collars 59 spaced a short distance from the head to permit a slight independent reciprocation of vthe piston rod and head.. The collars 59 have openings 59 to permit oil to flow therethrough and the spaces between the head 58 and the piston sleeve 57 permit oil to How therebetween. The bore G0 of the piston rod extends through the head of said rod and isintersected by a transverse bore (il leading to the periphery of the head. A ball valve G2 positioned at the intersection of the bores GO and 61 controls the flow of oil through the piston head bore by means of a valve rod 63 which extends through the bore 60 from the ball valve G2 to the outer end of the piston rod 55 and is provided with a threaded head 611 for convenience'in adjusting' the rod to limit the movement of the ball valve away from its seat. The piston 57 is also provided with a vbore 57 which is in alinementwith the outward movement of the piston rod and` head will be away from the piston, and

this movement willropen the space between the piston and the rod head and permit the oilV to freelyrtlow through the openings 59 and between the periphery of the head and the piston and through the piston bore 57" After this one-sixteenth movement, the rod head 58 engages the inner collar 59 and pulls the piston 57 outwardly to the outward end of the stroke. kOn the return stroke, the piston rod head moves inwardlyV one-sixteenth of an inch and closes the side flow of the oil from the piston bore 57, so as to give the desired resistance to mot-ion inwardly. After this independent movement ot' the piston rod and head, the piston is moved inwardly by the head, and the oil between the piston andthe inner end of the cylinder will flow through the bore 57 and the portion of the bore 60 controlled by the ball valve 62, and then through the trans- ',verse bore G1 and between the periphery of the rod head and the piston sleeve, and then through the collar openings 59l` into the outer end portion of the cylinder. In moving inwardly, the speed of Vtravel of the piston is controlled by the adjustment of the ball valve by the valve rod 63.

A coiled spring 65 positioned within the cylinder 53 and surrounding the tubular piston rod and interposed between the piston and the outer end of the cylinder is adapted to complete the remaining half movement oi' the swing of the door towards open or closed position.

Assuming that the door is to be opened, the switch 38 is closed suiiiciently long to complete the circuit to the magnets and release the armature,- which will through the intermediary of the parts described, opent-he compressed air valve to the air cylinder and cause its piston to move olutwardfly and swing the door to slightly less than half open position. In thus moving to said position, the spring 65 will be compressed by the outward movement of the piston 57. As soon as the door reaches this half position, the trip lever 35 will be moved inwardly to close the compressed air valve and to again engage the inner edge of the armature. The momentum'of the half swing of the door will carry it by the dead center line and the spring 65 will exert its pressure to swing the door to open position. To close the door, the switch. is again closed to release the trip latchand permit the compressed air to enter the cylinder 19 and actuate the piston to swing the door to approximately a halt-closed position, and at this point the trip latch is released to close the air valve.

In swinging to the half-way position, the spring in the cylinder' 53 is again compressed, and when the door swings over the dead center line by momentum, the spring will exert its pressureto continue the movement and completely close the door, with the parts in position to be again operated to open the door.

From the foregoing description, it will be seen that the fluid pressure means is used to swing the door from a closed or open position to a halt' open or closed position, and Athat in each instance a spring` means is used to complete the movement in either` direction.

For the Work performed, the levice is of very simple construction and is well adapted lor the purpose described.

liv/That l' claim as my invention is:

l. llhe combination with a door and its iframe, ot a. means lier openingl and closing; the door, comprising a bracket member connected to the iframe, a lever arm pivotally connected at one end to the bracket, a link member pivotally connected at one end 'to the door and at its other end to a medial portion o'j the lever arm, a cylinder' pivotally connected to the bracket, a piston Within the cylinder and having a rod which is pivotally connected to theouter end portion of the lever arm for moving the door approxi.- mately one-half ot its movement towards open or closed position, an electromagnetic means carried by the bracket and controlled from a distant point for controlling the 'llow oli pressure tluid to the cylinder, an oil c vlindcr pivotally connected at its inner end to the bracket, a piston Within the cylinder and having a bore, a piston rod pivotally connected to the lever arm and extending' into the 'cylinder and having a head on its inner end which movably extends into the piston and serves as a valve to partly close the bore ot the piston, said head having a bore closed by a check valve, and a coiled spring Within the oil cylinder and surrounding` the piston rod for moving the piston inwardly to complete the opening' or the closing' movement oiE the door in the direction in V\vh ich it is moving'.

Q. '.he combination with a door and its iframe, oit a means for openingl and closing" the door, comprisingl a bracket member' connected to the iii-ame, a lever arm pivotally connected at one end to the bracket, a link member pivotally connected at one end to the door and at its other end to a medial portion of the lever arm, a cylinder pivotally connected to the bracket, a piston within the cylinder and having a rod which is pivotally connected to the lever arm for moving` the door approximately one-half of its movement towards open or closed position, an.

electromagnetic means carried by the bracket and controlled trom a distant point for controlling' the flow of pressure fluid to the cylinder, an oil cylinder pivotally connected at its inner end to the bracket, a piston Within the cylinder and having a bore, a piston rod pivotally connected to the lever arm and extending into the cylinder and having` a head on its inner end which movably extends into the piston and serves as a valve to partly close the bore of the piston, lsaid head having` a bore closed by a check valve, means controlling the movement o1 said check 'valve to open position, and a coiled spring' Within the oil cylinder aL d surromiding the piston rod iter moving;` the piston inwardly to complete the opening' or the closing movement of the door in the direction in which it is moving.

3. The combination with a door and its frame, of a means for opening and closing` the door, comprising a bracket member connected to the `frame, a lever arm pivotally connected at one end to the bracket, a link member pivotally connected to the door and to the lever arm, a cylinder pivotally connected to the bracket, a piston Within the cylinder' and having a rod which is pivotally connected to thel lever arm 'for' moving the door approximately one-halt' of its movement towards open or closed position, an electroimlgnetic means carried by the bracket and controlled trom a distance point. for controlling' the flow of pressure fluid to the cylinder, an oil cylinder pivotally connected at its inner end to the bracket, a piston Within the cylinder and having a bore, a piston rod pivotally connected to the lever arm and extending into the cylinder and having` a head on it,n inner end which movably extends into the piston and serves as a valve to partly close the bore ot the piston, said head havine' a bore closed by a check valve, a valve rod engaging the check valve and extending` through the piston rod and having a part in threaded engagement with the piston rod to adjust the movement Iof said valve to open position, and a coiled spring` Within the oil cylinder and surrounding the piston rod for moving' the piston inwardly to complete the opening or the closing` movement of the door in the direction in which it is moving.

Ll. The combination Witha door and its trame, of a means for opening` and closing the door, comprising a bracket member connected to the frame, a lever arm pivotally connected at one end to the bracket, a link member pivotally connected to the door and to the lever arm, a cylinder pivotally connected to the bracket, a piston Wit-hin the cylinder and having' a rod which is pivotally connected to the lever arm for moving the door approximately one-halt of its move- Y ment towards open or closed position, an electromagnetic means carried bythe bracket and controlled from a distant point' for controlling the flow of pressure liuid to the cylinder, an oil cylinder pivotally connected at its inner end to the bracket, a piston Within the cylinder and having` a bore, a piston rod pivotally connected to the lever arm and extending into the cylinder and having a head on its inner end which movably extends into the piston and serves as a valve to partly close the bore et the cylinder, said head having a bore closed by a check valve, said head also having a transverse bore which intersects the first mentioned bore adjacent the cheek valve to permit the liow of oil through the bores of the piston and the head and the transverse bore to the opposite side of the piston when the piston is moving inwardly, a valve rod engaging the chech valve and extending through the piston rod and having a part in threaded engagement with the piston rod to adjust the movement of said valve to open position, and a coiled spring within the oil cylinder and surrounding the piston rod for moving the piston inwardly to. complete the opening or the closing movement of the door in the direction in which it is moving.

5. The combination with a door and its frame, of a means :tor opening and closing the door, comprising a bracket member connected to the frame, a lever arm pivotally connected at one end to the bracket and having a projecting portion, a link member pivotally connected to the door and to the lever arm, a'cylinder pivotally connected to the bracket by a tubular pivotal connection through which air under pressure is supplied to the cylinder, a. valve Within said pivotal connection for coitrolling the flow of air to the cylinder, a bell crankV lever yieldingly controlling the valve, an electromagnetic means carried by the bracket and having a remote control and an armature, a trip lever releasably engaging the armature and pivotally connected to the bell crank lever, a threaded member forming the pivotal connection of the trip member to move the trip member laterally into braking engagement with the bracket to retard the movement ot said trip lever, a piston within the cylinder' and having its rod connected to the projection oi the lever arm, an oil cylinder pivotally connected to the bracket, a piston withinthe oil cylinder and having a sleeve and a central bore, a piston rod pivotally connected to the projection of the lever arm and extending into the oil cylinder and having headed end which reciprocally engages the piston sleeve and also moves said piston, said headed end also serving as a valve to partly close the bore ot the piston and also having longitudinal and transverse bores, a valve controlling said longitudinal bore, a rod extending through the eil cylinder piston red and engaging the valve, the outer end of the valve rod having a threaded engagement with the piston rod to adjust the opening ot said valve, and a coiled spring surrounding the oil cylinder piston rod and interposed between the piston and the outer end portion of the oil cylinder.

6. The combination with a door and its frame, of ameans for opening and closing the door, comprising a bracket member connected to the frame, a lever arm pivotally connected at one end to the bracket and having a projecting portion, a link member pivotally connected to the door and to the lever' arm, a cylinder pivotally connected to the bracket by a tubular pivotal connection through which air under pressure is supplied to the cylinder', a valve within said pivotal connection for cont-rolling the flow of air to the cylinder, a bell crank lever yieldingly controlling the valve, an electromagnetic means carried by the bracket and having a remote control and an armature, a trip lever releasably engaging the armature and pivotally connected to the bell crank lever, a threaded member forming the pivotal connection of the trip member to move the'trip member laterally into braking engagement with the bracket to retard the movement et said trip lever, a bell crank lever engaged by the lever arm for returning the trip lever to its armature engaging position, a piston within the cylinder and having its rod connected to the projection of the lever arm, an oil cylinder pivotally connected to the bracket, a piston within the oil cylinder and having a sleeve and a central bore, a piston rod pivotally connected to the projection of the lever arm and extending into the oil cylinder and having a headed end which reciproca-ily engages the piston sleeve and also moves said piston, said headed end. also serving as a valve to partly close the bere ot the piston and also having longitudinal and transverse bores, a valve controlling said longitudinal bore, a rod extending through the oil cylinder piston rod and engaging the valve, the outer end of the valve rod having a threaded engagement with the piston rod to adjust the opening oi said valve, and a coiled spring surrounding the oil cylinder piston rod and interposed between the pist-on and the outer end portion of the oil cylinder.

7. The combination with a door and its frame, of a means for opening and closing the door, comprising a bracket member connected to the trame, a lever arm pivotally connected at one end to the bracket, a link member pivotally connected to the door and to the lever arm, a cylinder pivotally connected to the bracket, a piston within the cylinder and having a rod which is pivotally connected to the lever arm for moving the door approximately one-half of' its movement towards open or closed position, an electro magnetic means carried by the bracket and controlled from a distant point for controlling the flow of 'pressure iiuid to the cylinder, means moved by the lever arm for setting the pressure fluid means in operative position, and a yielding means connected to the bracket and to the lever arm and put under tension by the pressure 'Huid tor completing* the opening or closing movement of the door in the direction in which it is moving.

8, A door operating' device, comprising a bracket, a lever arm pivotally connect-ed at one end to the bracket, a link member pivota ly connected to a medial portion of the lever arm and having means for pivotal connection with a door, a fluid pressure means connected to the lever arm and to the outer end portion of the bracket for moving the lever arm a certain distance, electromagnetic means carried by the bracket for controlling the tlow of tluid pressure to the fluid pressure means, and a yielding` means connected to the brack t and to a medial portion ot the lever arm and put under tension by the fluid pressure means for completing` the movement of the lever arm in the direction it is moving.

9. A door operating,- device, comprising a bracket, a lever arm pivotally connected at one end to the bracket, a link member pivotally connected to a medial portion of the lever arm and havingmeans tor pivotal connection with a door, a l'luid pressure mea-ns connected to the lever arm and to `the outer end portion et the bracket for moving the lever arm a certain distance, electromagnetic means carried by the bracket for controllingthe flow of fluid pressure to the l'luid presn sure means, means actuated by the lever arm for setting` the pressure fluid means in operative relation to the electromagnetic means7 and a yielding means connected to the bracket and to the lever arm and put under tension by the fluid pressure means for completing the movement ot' the lever arm inthe direction it is moving.

l0. A trip lever brake and stop means for a door operating device, ctnnprisinga support, a screw member carried by the support, and a trip lever threaded on the screw and turnable thereon to rictionally engage the side portion of the support carrying the screw to retard and stop the movement of vthe trip lever at a predetermined point.

ll. A trip lever brake and stop means for a door operating device, comprisingY a support, a screw member revolubly adjustably carried by the support, means for holding the screw member in adjusted position, and a trip lever having,- a threaded t'ulcrum engagement with the screw member, said threaded engagement causiirg` the lever when turned to move laterally on the screw member and impinge against the side portion oit the screw support to 'retard and stop the turning` movement of the trip lever.

In testimony whereof, l allix my signature.

LOUIS F. SCHOELKOPF.