US2306466A

US2306466A - Winding apparatus

Info

Publication number: US2306466A
Application number: US317099A
Authority: US
Inventors: Patterson Charles Robley
Original assignee: Certain Teed Products Corp
Current assignee: Certainteed LLC
Priority date: 1940-02-03
Filing date: 1940-02-03
Publication date: 1942-12-29
Anticipated expiration: 1959-12-29

Description

Dec. 29, 1942. Y c. R. PATTERSON 2 306,466

-YWINDING APPARATUS Filed Feb. 3, 1940 a Sheets-Sheet 1 INVENTOR Omen-'5 A. P4770M ATTORNEY Dec. 1942- c. R. PATTERSON 2,306,466

WINDING APPARATUS Filed Feb. 3, 1940 '5 Sheets-Sheet 2 INVENTCR 94 55 K. P4 TI'EEJO/V ATTORNEY Dec. 29, 1942. c. k. PATTERSON 2,306,466

WINDING APPARATUS Filed Feb. 5, 1940 3 Sheets-Sheet; 3

o o I I l N V E N T O R Gen/e45: R 84 77.51am

ATTORNEY Patented Dec. 29, 1942 WINDING APPARATUS Charles Robley Patterson, Albany, .Calii' assignor to Certain-Teed Products Corporation, New York, N. Y., a corporation of Maryland Application February 3, 1940, Serial No. 317,099

9 Claims. (Cl. 242-55) This invention relates to machines for winding sheet material into rolls about a form and relates more particularly to mechanism for effecting removal of the roll from the form after being wound thereon.

The winding machines now commonly used are, in many cases, provided with a collapsible mandrel upon which the sheet material may be wound. It is usual to support the mandrel so that one end thereof is free of support. In order to expedite removal of a roll of sheet material from the mandrel, collapsing mechanism is provided which when operated acts to reduce the perimeter of the mandrel within the roll. The roll is then pulled manually off the collapsed mandrel over the free end thereof.

Although use of a collapsible mandrel is intended to facilitate removal, difliculties, nevertheless, may be experienced in removing a roll from this type of mandrel. These difficulties may be encountered because of variations in the conditions under which the winding operation is carried out. Variations in tension under which between the mandrel surface and the inner periphery of the roll make it difficult for an operator to pull the roll endwise from the mandrel. Delays are thus caused which reduce output and increase the cost of the winding operation.

One of the objects of my invention is to provide mechanism which overcomes the above mentioned difficulties encountered in'the removal of rolls of material from the mandrel of a winding machine. Y

A further object of my invention is to provide a mechanism for moving a roll along the mandrel toward the end thereof where it may be easily removed manually or handled by suitable transporting means. 4

Another object of my invention is to provide a roll moving mechanism for this purpose which may be easily installed on existing winding machines without interfering with the usual winding operation and the control thereof.

A still further object of my invention is to provide for actuation of the mechanism for removing the roll from the mandrel upon operation of the mandrel collapsing mechanism without additional effort on the part of the operator.

In its broader aspects my invention is con-- 1 cerned with the provision of a device for engaging a roll. wound on a mandrel which causes said roll'to move along the axis of the mandrel. In the usual case where the mandrel is one which is supported so that an end thereof is free of support a device is arranged to effect said movement toward said free end so that the roll may vention,however, other means and devices may be used to effect said axial movement of the roll, engagement of the roll being obtained by action of said 'roll engaging means on the roll at other portions thereof or on a carrier for the roll, if such is used.

The invention utilizes power actuated means which, within the scope of the invention, may be of different types and which may be so connected to the roll-moving mechanism as to effect the movement of the roll along the mandrel. To

' accomplish control of the operation of the roll moving mechanism and of the power means which drives it, the invention provides devices which may be mechanical or electrical or combinations thereof which are so arranged in con nection with the power means that control'of the operation thereofis easily accomplished by the-operator for the purpose of effecting removal of the roll from the mandrel and to permit restoration of the various mechanismsto the condition where a new 'roll may be started.

To this end the control apparatus of the invention is so designed that the operation of the roll-moving mechanism is limited to the period or cycle which will include the movement of the roll along the mandrel to its removed position and the return of the mechanism to its original position so that a new roll may be started. The. power means and the mechanisms which connect it to the roll-engaging means, therefore, may

' be designed so that only a limited motion or I trol from its operating position to which it has been moved at will by him for the purpose of effecting the removal of the roll.

A particular feature of the invention is that the devices for controlling the operation of the power means and for effecting movement of the roll-engaging means to cause removal of the roll are so related to the mechanism for effecting collapse of the mandrel that when the operator operates the mechanism for collapsing the mandrel the power actuated means is brought into operation. Thereafter, in accordance with the invention, a limited period of such operation is secured by cut-off or releasing means designed to secure this limited operation. The cut-off or releasing means is so arranged that for a predetermined period of time or for a predetermined movement of the mechanism, such as the full movement forward and return of the rollengaging device or for a predetermined part of said movement, the power is delivered to the rollengaging device but thereafter is cut off.

The power source may be a rotating source such as an electric motor or it may -take the form of a direct drive, either with or without intermediate mechanism, such as is provided by the fluid pressure cylinder having a piston connected to the roll-engaging means. Advantageously a rotating power source may be used which is connected to the roll-engaging and roll-moving mechanism through a clutch device of wellknown type. This clutch device allows a predetermined rotational movement of the driven member thereof after the clutch has been engaged. Devices for effecting release and engagement of the clutch may be connected to the control members of the invention and particularly to the mechanism for collapsing the mandrel. The connection may be mechanical or preferably electrical and may be arranged to be actuated by the simple operation on the part of the operator of the mandrel collapsing mechanism. The device of thewell-known type referred to may be designed to effect a single revolution of the driven member of the clutch and therefore lends itself to a simple connection to the roll-moving means so that a single revolution of the clutch effects a stroke forward and return of the roll-engaging member. Upon completion of this single revolution the device is stopped.

The invention, moreover, provides means designed to be self-limiting or for time or period limitation of its operation and arranged in connecti n with the power means of the type referred to to insure the predetermined movement thereof, such as a single revolution of the clutch or of the roll-moving mechanism itself. To accomplish this purpose the invention may utilize in certain embodiments electric control devices which are commercially available and which for the purposes of the invention have been arranged to cooperate with the control apparatus above referred to in order to insure the proper period of operation of the power means and the desired movement of the roll and of the roll-engaging means.

For a more complete explanation of my invention together with other objects and advantageous features and combinations of parts, reference may be had to the accompany drawings, in which Fig. l is a side elevation of one form of pushoff device of the invention.

Fig. 2 is an elevation of a modified form of the invention.

Fig. 3 is a section on line 3-3 of Fig. 2.

Fig. 4 is a cross-section of a collapsible mandrel taken on the line 4--4 of Fig. 2.

Fig. 5 is a schematic diagram of a preferred machine is shown with a roll 3 (in broken outline) wound thereon. The mandrel is supported at the left in the drawings by means not shown and has its end at the right free ofsupport. A closed pressure cylinder 9 having a piston II slidably mounted therein is positioned with its axis parallel to the axis of the mandrel and ofiset therefrom. A rod I0 extending through stufling box and guide I3 at one end of the cylinder 9, rigidly connects the piston II to pusher plate 5. A four way valve 2| is connected to direct the flow of a fluid under pressure, upon suitable operation, from a supply pipe I5 to a selected one of the delivery pipes I! and 23 and thereby to the end of the cylinder to which the selected delivery pipe is connected. The valve 2| is so constructed that it connects the other end of the cylinder through the remaining delivery pipe to the discharge pipe I9. The supply pipe I5 may be connected to a fluid source such as steam, air, gas or liquid under a suitable pressure. Opposite ends of the cylinder 9 are connected by

pipes

25 and 29 through an equalizing valve 21.

The operation of the device shown in Fig. 1 is as follows: Upon completion of the winding of a roll 3, the equalizing valve 21 is moved to prevent flow of fluid through

pipes

25 and 29 between opposite ends of the cylinder 5. The four way valve 2I is moved to the position shown in full outline in Fig. 1 connecting the fluid supply pipe I5 with delivery pipe I! and likewise connecting delivery pipe 23 to discharge pipe I9. The fluid pressure acting on the piston starts movement thereof toward the right in Fig. 1. Pusher plate 5, being rigidly connected to the piston II by rod I0, is moved into engagement with the end of roll 3 and pushes roll 3 along the mandrel I toward the free end thereof.

When the piston II approaches the end of its stroke, equalizing valve 2'! is opened and allows free passage of the fluid through

pipes

25 and 29 connecting opposite ends of cylinder 9. Thus a balance between pressures exerted on opposite sides of the piston may be effected which tends gently to stop movement of the piston. The length of stroke of the piston I I and pusher plate 5 connected thereto is determined so that at its end position adjacent the free end of the mandrel the pusher plate 5 has effected movement of the roll 3 to a position for easy removal of the roll 3 from the mandrel I.

The return stroke of the piston is effected by moving the four way valve 2I to the position shown in dotted outline in Fig. 1 and by again closing the equalizing valve 21. Fluid pressure is thereby applied through delivery pipe 23 to the right hand side of the piston II and the piston together with the rod I0 and the pusher plate 5 associated therewith is moved away from the free end of mandrel I. When the piston approaches the end of the return stroke, the equalizing valve 21 may again be opened to cause the return movement of the piston to be gently arrested. Four way valve 2I may then be moved to a position which prevents flow of the fluid under pressure through the delivery pipe 23, and the winding machine is then ready to start winding another roll of material on mandrel I.

While the valves 2| and 21 may be operated manually, I may interconnect the equalizing valve 21 with suitable valve gearof conventional type to the rod I so that the valve 21 may be operated by movement of the rod I without additional effort on the part of the operator. It in the device shown in Fig. l, the mandrel I is of the collapsible type I may connect the valve 2| to the mandrel collapsing mechanism and effect flow through the valve 2| in accordance with operation of the mandrel collapsing mechanism. so that when the mandrel is maintained collapsed the valve 2| will be in the position shown in full outline in Fig. 1. When the collapsing mechanism is released the valve 2| will be moved to effect return of the piston to its original position.

In Figs. 2 and 3 I have shown an embodiment of my push-oif device which utilizes a rotating source of power to drive the push-oil mechanism. A similar arrangement may be used with direct acting power means, of the type disclosed in Fig. 1, which modification will be morefully described below.

The winding machine is provided with a collapsible mandrel which is driven from a rotating power source as by belt 13, running on pulley H keyed on a shaft extension of the mandrel I mounted to rotate on bearings 15 and 18 in base 14.

As can be seen by referring to Figs. 2 and 4, the mandrel l in the particular embodiment illustrated comprises a cylinder 2 having an opening 4 in the form of a slot extending from the free end of the mandrel for the full width of a sheet of material to be rolled thereon and used for insertion of the end of the sheet at the start 'of the winding operation. In suitableslots in the cylinder wall a plurality of roll supporting plates 5 are arranged to move radially outwardly from and inwardly toward the axis of the mandrel. The plates 6 are formed with cut-out portions l2 having the form of inclined planes. Conical wedges I are pinned to the mandrel collapsing rod 8 for movement therewith. The rod 8 extends through the support of the mandrel and end of rod 8 protrudes through the left of the support 14 where it may be contacted by the end 81 of the treadle lever system. A spring (not shown) tends to bias rod 8 toward the left side of Fig. 2 thus maintaining the mandrel I expanded by the action of the inclined surface of the wedges I on the inclined planes of cut-outs l2 of plates 8. When the rod 8 and wedges I are moved toward the right against the bias of the spring the plates 8 are free to move radially toward the axis of the mandrel l due to the slidin of the conical wedges 1 within the inclined plane portions l2 and thus the effective perimeter of the mandrel provided by the outer edge surfaces of the plates 8 may be reduced within a roll wound thereon.

A track 3! which may be of square cross-section is fastened to the base 14 and leg 80 of the winding machine by bolts or other suitable means to position said track with its length parallel to the axis of the mandrel I, but offset from the axis of the mandrel I as may be seen by reference to Fig. 3. A carrier 33 provided with rollers 35 which contact and roll upon the track 3| is guided by the track to move therealong parallel to the axis of the mandrel. Pusher plate 5 is rigidly secured to one end of said carrier and is formed to contact a portion of the end surface of a roll 3 of material wound on the mandrel I.

Connecting rod 81 loosely engages pin 88 which is fixed to the carrier 38. The other end of rod 81 is pivotally connected at 38 to one end of a lever 39- which is mounted at the other end thereof for angular movement about stud 4| as a fixed center. Intermediatethe ends of lever 39 and pivotally connected thereto is a connecting rod 43. The other end of rod 43 is connected to a crank pin 40 on a crank disc 41 which is keyed to the driven shaft 48 of a clutch 49. The driving member of said clutch 49 maybe keyed to a sprocket 98 driven by a chain 98 from a sprocket I04 on a power driven shaft I00. Also mounted on said power driven shaft I08 between bearings I06 and I08 held in supports I01 and I09 is a flywheel I02.

The clutch 49 may be of the type known as a single revolution clutch. The function of the single revolution clutch 49 is to transmit power between sprocket 98 which is to be run continuously and shaft 48 which is to be driven therefrom intermittentlyand which is to be stopped always in the same position.

The clutch 49 in the particular embodiment illustrated in Fig. 6 may comprise an outer race 200, an inner hub 20l having a plurality of flat surfaces 203 on the outer periphery thereof which extend parallel to the axis of the outer race'and a cage 205 having rollers 201 mounted therein positioned between the outer periphery of the hub 20l andthe inner periphery .of the race. A cam 50 is fastened to the hub 20l to rotate therewith. A spring 202 may be provided normally so to position the cage 205 and hub 20l relative to each other as to cause the roller 201 to become wedged in driving relation between the flat surfaces of the hub and the inner periphery of the driving race 200. When cam 50, however. is held against rotation the cage 205 and the hub 20| areso moved circumferentially relative to each other under the action of spring 202 that the rollers 201 ar no longer wedged between the flat surfaces of the hub 2M and the race 200 and drive of the hub 2M and cam 50 through the clutch is stopped.

As shown in Fig. 2, trip 44 is mounted to rotate upon pin 5|. This trip has an upwardly extending arm 45 and an arm 51 extending horizontally to the right in Fig. 2 as well as an arm 62 extending horizontally to the left. The pin 5| is carried in bracket 46 so located that the upper end of the upwardly extending arm 45 is adjacent the cam 50. This cam is provided with a step 52 which upon rotation of the cam contacts the end of the upwardly extending arm 45. Cam is fastened to hub 20f, Fig. 6. The hub "I is keyed to shaft 48. Cam 50 and shaft 48, therefore, are rotated upon engagement f the clutch 49 of which the cam 50 is a part.

Link 42 connects at stud 53 from the outer end of the horizontally extending arm 51 of the trip 44 to the right hand end of portion 93 of lever 89 of the treadle mechanism. By a downward pull exerted on the stud 53 through the link 42 the upwardly extending arm 45 may be moved from under the step 52 of the cam 50. Under the action of the spring 202 the single revolution clutch 49 will be engaged and will cause the driven shaft 48 and the crank disc 41 carried thereby to rotate. Throu h the connecting rod 43 the push-ofl mechanism thereby is caused to operate.

To effect a single revolution of the driven shaft 48 the downward pull on the stud 53 may be removed before the revolution is completed. Tension spring 54 connected between stud 53 and

support

58,1;0 which itis secured, exerts an up-' ward force at thev outer end of the horizontal arm 51 of the trip 44 and causes the upwardly extending arm 45 of the trip 'to follow the cam surface toward the center line of the shaft 48 until the trip arm 45 is again brought into contact with the step 52 ,of the cam 58. Thereupon the cam instantly actuates the mechanism of the clutch, as above described, to disengase the clutch and rotation of the parts connected to 10 the driven member 88 of the clutch 48 ceases.

Unless prevented, considerable shock may be experienced when the trip arm 45 engages the step 82 formed on cam 58 and abruptly stops the driven mechanism at the end of the revolution of the shaft 48. To overcome this shock, I may provide a brake 58 having a drum 58 mounted on the driven shaft 48 of the clutch 48 togradually slow down the driven shaft 48 as the end of the triparm 45 approaches the step 82 of cam 58 near the end of a revolution. The brake 88 comprises a band 88 carried at one end by stud 18 mounted in support 58. The band 88 extends about the outer surface of the drum 58 and is adjustably connected by a threaded rod 5 88 at the other end thereof to portion 82 of trip 44. A light compression spring 55 is provided to determine the amount of braking eifect exerted by the brake band 88 on the driven drum 58 and may be adjusted by means of nut I8. so

As can be seen from Fig. 3, rod 88 passes through an opening in portion 62 of trip 44 and is held from free movement therein by a stop nut 88, compression spring 55 and adjusting nut Ill. The

action of brake 58 may be increased by com- 86 pressing the spring 55 on rod 58 between portion 82 of trip 44 and adjusting nut 18 by turning nut 10 clockwise. The braking force may be decreased by turning nut 18 counter-clockwise to reduce the compression of spring 55.

As stud 58 is pulled downwardly and trip arm 45 of trip 44 is moved out of engagement with the step 52 formed in cam 58, arm 88 of the trip 44 is caused to be movedupwardly against stop nut 88, thus removing the brake band 88 5 from frictional engagement with the brake drum 58 and allowing rotation of the driven member 88 and the push-oil mechanism connected thereto. The invention provides means for removing the pull from stud 53 before the single revolution of the cam 58 is completed. The trip arm 45, following the cam surface, by action of tension spring 54 gradually tightens the brake band about the drum 58 due to the downward movement of arm 82 of the trip 44 acting through held in support 8| intermediate the ends of said lever I1, and is positioned to move in a vertical plane transverse to the plane in which lever 88 and treadle 8| are free to move. The end 15 of lever 11 is arranged below the treadle 8| to be contacted thereby upon downward movement. of said treadle. Portion 88 of the lever TI is connected by a loosely fitting pin 85 to end 81 of lever 89. Lever 88 is pivotally mounted at 8| 8| as center in a'plme generally parallel with the plane of treadle movement. Portion 88 of lever 88islooselyconnectedbypln88tolink48.

I may also substitute a ram or pressure cylinder of the type shown in Pig. 1 for the drive of the modification of the push-oi! device shown in Flgs.2and8. Inthiscase,Imayconnectthe pistpn rod ll of the ram of l 'ig. 1 to the lever 88bymeansofconnectingrod48. Inthismodiiication I may utilize a shorter stroke for the piston thanthatfor themechanismof Fig. l. Inthismannerthepiston andcylinder 8 may be positioned further from interferencewiththewindingofthemachine. The operation of the ram would follow the mode of operation described in connection with Fig. 1 above.

Theoperation ofthe machineshowninl igs. 8 and 3 is as follows:

The shaft I88, flywheel I88 and the connected members up to the driving member of clutch 48 are continuously driven from a power source not shown, when the machine is in operation.

The end ofasheetofthematerialtobewound intoarollisinsertedintotheslot4ofthemandrel i (Fig. 4). Drive of mandrel I from pulley II is instituted by connecting belt 18 to a rotating power source. when the desired length of material has been wound on the mandrel l, rotation thereof is stopped usually automatically by the control device of the winding machine. The mandrel collapsing treadle 8| then is depresed by the foot of the operator to allow the supporting plates 8 to be collapsed within the roll 8. As the treadle 8| travels downwardly it engages and moves end 15 of lever II in the same direc-- tion and causes lever ll to rotate about pin 18 raising end 88 of lever II. The end 81 of lever 88 will be moved upwardly in accordance with the upward movement of end 88 of lever I1. Lever 88 is thereby rotated about pin 8|, lowering end 88 thereof and causing link 42 to move downwardly. As the link 42 moves downwardly'it acts through pin 58 to causetriparm 45 to move toward the right in Fig. 2 about pivot 5| away from the center of the driven shaft 48. The portion 82 of the trip 44 -is correspondingly moved upwardly releasing the brake 58 and allowing the clutch mechanism to become engaged in driving relation to shaft 48 and crank disc 41 thereon.

The crank disc 41 starts to revolve in the direction indicated by the arrow and pivotal move-- ment of the lever 88 is brought about through connecting rod 48. Connecting rod 81 between the end of lever 88 and the carrier 88 transmits the motion from the lever 88 to the carrier 88 and causes the carrier and the attached pusher plate 5 to be moved along track 8| toward the free end of the mandrel The pusher plate 5 engages a portion of the end surface of a roll 8 wound on the mandrel and as the motion continues pushes the roll on the mandreltoward the free end thereof. When the push-oil mechanism has reached the extreme position indicated in dotted outline in Fig. 2, the operator removes I his foot from the mandrel collapsing treadle 8| and allows the spring (not shown) within the mandrel to raise treadle 8|. The tension spring 54 then moves trip arm 45 into contact with the cam surface which is rotating. As the trip arm approaches the center of shaft 48 under the action of spring 54, gradually there is instituted action of brake 58 to slow down the movement of the driven members of the push-off device intermediate the ends thereof to moveabout pin toward the initial position shown in full outline dropped to a I I50, completing the time cycle.

in Fig. 2. When the-carrier 38 and pusher plate 5 reach the position indicated in full outline in Fig. 2, the trip arm 45 contacts the step 52 formed on cam 50 immediately disengaging the drive through clutch 49 as explained above in connection with Fig. 6. Meanwhile, full braking action'of brake 58 serves to stop motion of the driven portion of the push-ofl' device simultaneously with the disengagement of the clutch.

For ease of operation and freedom from mechanical difliculties I prefer to utilize an electrica1 control system of the type shown in Fig. 5 to actuate the push-off device.

In schematic representation part of the mandrel collapsing mechanism is shown at 82 and comprises the mandrel collapsing treadle 6| and an arm I I2 rigidly attached thereto for movement therewith.

Mounted on arm II2is spring II4 specially formed of flat strip spring material and arranged to contact arm II6 of switch II5 to close the circuit through switch II5, momentarily, as the treadle is depressed. After the spring II4 passes beyond the arm I I6 of switch II 5, as shown in dotted line in Fig. 5, tension spring I I8 returns the switch to open circuit position and maintains switch H5 in open circuit position away from contact point II I.

The armatures of solenoids I40 and I42 are mechanically connected respectively to the brake arm I60 and the trip arm I45 of the clutch 49. These solenoids I40 and I42 are electrically connected across an electric power line I48 through the respective contact points I34 and I36 of a two pole relay I30. The contact points I24 of a two pole relay I20 are electrically connected across the switch I I5 and serve to maintain relay I20 energized from an alternating current line I28 after switch II5 has been actuated to allow flow of current therethrough momentarily.

At I I is shown a vacuum tube time-delay relay of standard construction. The mechanism of the time delay device IIO may be of the type described in Patent No. 2,183,412 to Marvin B.

' Sledd, dated Dec. 12, 1939.

The operation of the time-delay device as embodied in the control of the invention is as electrical control circuit of Fig. is as follows:

The vacuum tube time-delay relay H0 is adjusted by means of potentiometer I54 to a time interval which is less than the period necessary for the push-oil operation and return movement of theroll engaging means 5 to its initial position shown in full outline in Fig. 2.

Upon completion of the winding of a roll, the treadle H is depressed downwardly to collapse the mandrel I within the roll wound thereon. The spring ;I I4 mounted on arm I I2 of the treadle 6| is moved downwardly to momentarily close the electrical circuit through switch II5. After the spring II4 passes beyond the arm II6 of switch II5, as shown in dotted line in Fig. 5, spring II8 returns switch II5 to the open position. As the circuit through the contact points I66 oi the time-delay relay II 0 is normally closed the momentary closing of switch I I5 causes current to flow from the alternating current line I28 to energize relays I and I30, closing the respective contact points I24, I26 and I34, I36 thereof. Contact points I24 serve to maintain relays I20 and I energized even though the operator may remove his foot from the treadle 6| after depressing it slightly without moving spring II4 down past the end of arm II6 as described. Closing of the circuit through contact points I26 which-are electrically connected to the relay I20 open, the capacitor I52 tends to charge to the peak value of E which is adjusted by potentiometer I54. When a. circuit is completed through the contact points I26 of the relay I20, the timing cycle is initiated. The voltage e applied to the grid I56 of the vacuum tube I58 is less than the voltage across the charged condenser I52, making the grid I56 negative with respect to the cathode I62 of the vacuum tube I58 and prevents flow of current through the tube. The condenser I52 slowly discharges through the resistor I64 until its voltage has value less than c; This makes the grid positive and allows flow of current in the tube through the coil of relay I50. This current picks up the relay pole piece I5I and breaks the circuit through the switch points I66 of the relay Adjustment of the potentiometer I54 determines the voltage charge of condenser I52 and hence the time period during which current may flow through the switch points I66 of relay I50. The timer is arranged to be reset when contact points I26 of the relay I20 are opened.

The operation of the push-off device using the the vacuum tube time-delay relay IIO initiates the time cycle. I

When the relay I30 is energized contact points I34 and I36 serve electrically to connect solenoids I40 and I42 across power line I48 and the brake band is moved out of contact with the driven drum 59 by the pull of solenoid I40 on the arm I60 the left hand end of which is moved into I contact with nut 68. By the pull of solenoid I42 the clutch trip arm I45 is likewise removed from contact with the step 52 of cam 50 thereby causing the clutch 49 to start drive of the push-off mechanism as described above in connection with Figs. 2 and 6. The time delay relay I I0 has been functioning in the meanwhile and upon elapse of the predetermined period of time, set by adjustment of potentiometer I54, which is less than that necessary for the push-off device to make one complete cycle, the relay I50 is raised to break the electrical circuit throughits points I66. When the circuit through the contact points I66 of the relay I50 is broken, the relay I20 drops out and relay I30 immediately drops out as it is no longer energized. The solenoids I40 and I42 are electrically disconnected from line I48 by the breaking of the electrical circuit through contacts I34 and I36 of relay I30. Tension spring I46 then acts to cause trip arm I45 to follow the surface'of cam 50 and tension spring I44 applies force on the brake arm I60 and thereby brings brake band 60 into frictional contact with the drum 59 on the driven shaft 48 and slows down the driven shaft 48. When the trip arm I45 again contacts the step 52 of cam 50 of the clutch 49, the clutch is caused to disengage and shaft 48 is held from movement upon the completion of the push-off operation.

I do not wish to limit my invention to the us of the exact form of time delaydevice shown at IIO as this type of relay isoperable only from an alternating current source. I may substitute for said vacuum tube time delay relay any suitable electrical or mechanical device which will serve to open an electrical circuit after a predetermined rotation of the driven shaft 48 which is connected to roll-engaging means 5 of Figs. 2

roll along the mandrel and provide a spring or other bias means to effect the retum stroke of the push-oi! device.

Having thus described my invention I now claim:

1. In a winding mechanism having a mandrel supported with one end thereof free of engagement with a support, a roll removing device comprising means operable at will for effecting actuation of said roll removing device, a track oilset from said mandrel and like-extending with the axis of said mandrel, a carrier mounted on said track and constructed and arranged to move therealong, means carried by said carrier and constructed and arranged to engage a roll wound on said mandrel to move said roll axially toward the free end of the mandrel, a lever pivoted at one end and connected to said carrier at the other end thereof, a rotatable shaft, means connecting said shaft and said lever to eflect pivotal movement of said lever upon rotation of said shaft, rotating power means for driving said shaft, a clutch connected between said power means and said shaft, means arranged to act on said clutch to eflect engagement thereof for a predetermined rotational movement of said shaft,

- and means connected to said means operable at will and to said clutch engaging means to effect engagement of said clutch upon operation of said means operable at will.

2. A winding mechanism comprising a collapsible mandrel supported with one end thereof said shaft, means arranged to act on said clutch to effect engagement thereof for a predetermined rotational movement of said shaft, and means connected to said means operable at will and to said clutch engaging means to effect engagement of said clutch upon operation of said means operable at will.

3. In a, winding mechanism having a co1laps-- ible mandrel, a roll removing device comprising means for collapsing said mandrel, means constructed and arranged to engage a roll wound on said mandrel and mounted to move along the mandrel to effect movement of the roll axially on the mandrel, power operated means connected to said roll engaging means for effecting said movement of said roll engaging means upon actuation thereof, electrically actuated means connected to said power operated means and constructed to cause actuation of said power operated means upon energizing of said electrically actuated means, a switch arranged to close an electrical circuit through said electrically. actuated means, means operable at will for cii'ecting actuation of said roll removing device, a connection to said means for collapsing said mandrel from said means operable at will to actuate the one upon operation of the other, and a separate connection to said switch from said means operable at will to close said switch upon operation of said means operable at will, said two connecting means being so constructed and arranged withrespecttoeachotherandtosaidmeans operable at will as to effect collapse of the mandrel concomitantly with the movement of the roll engaging means.

4. In awindingmechanism accordingto claim 3, means electrically connected in said circuit of said electrically actuated means to open said circuit after said roll engaging means has been moved a predetermined distance axially along the mandrel.

5. Winding means comprising a collapsible mandrel, means operable to effect collapse of said .mandrel, means constructed and arranged to engage a roll wound on said mandrel and mounted to move along the mandrel to eflect movement of the roll axially on the mandrel, a rotatable shaft, means connecting said shaft and said roll engaging means to eifect said movement of said rollengaging means upon rotation of said shaft, rotating power means for driving said shaft, a

clutch connected between said power means and said shaft and constructed to connect said power means in driving relation to said shaft for predetermined rotation thereof, electrically operated means constructed and arrange upon being energized to act on said clutch to cause engagement of said clutch, a switch arranged to close a circuit through said electrically operated clutch engaging means, said switch being connected to said means for eflecting collapse of said mandrel and arranged to close said circuit upon operation of said means for effecting collapse of said mandrel.

6. In a winding mechanism according to claim 5, means electrically connected in said circuit of said electrically actuated clutch engaging means to open said circuit upon completion of a fraction of said predetermined rotation of said shaft.

7. In a winding mechanism having a collapsible mandrel a roll removing device comprising means to eflect collapse of said mandrel, means constructed and arranged to engage a roll wound on said mandrel and mounted to move along the mandrel to effect movement of the roll axially on the mandrel, a rotatable shaft, means conmeans upon operation of said means for effecting.

collapse of said mandrel.

8. In a winding mechanism having a collapsible mandrel a roll removing device comprising means to effect collapse of said mandrel, means constructed and arranged to engage a roll wound on said mandrel and mounted to move along the mandrel to effect movement of the roll axially on the mandrel, power means to drive said roll engaging means to eflect said movement thereof, coupling means between said power means and said roll engaging means constructed to effect connection and disconnection of said power means and said roll engaging means, control means arranged to act on said coupling means to eiiect said driving connection therethrough for a predetermined movement of said roll engaging means, and means connected to said mandrel collapsing means and to said control. means to actuate said control means to eflect said drivin connection through said coupling means 'upon operation of said means for eflecting collapse of said mandrel.

9. In a winding mechanism having a collapsible mandrel a roll removing device comprising means to eiIect collapse of the mandrel, means constructed and arranged to engage a roll wound on said mandrel and mounted to move along the mandrel to eiiect movement of the roll axially on the mandrel, power means to drive said roll engaging means to effect said movement thereof, a clutch connected between said power means and said roll engaging means to effect connection and disconnection of said power means and said roll engaging means, means connected between said clutch and said mandrel collapsing means to cause said clutch to eflect connection of said power means to drive said roll engaging means upon actuation of said mandrel collapsing means, said means connected between said clutch and said mandrel collapsing means including a device actuatedupon driving operation of said power means and arranged to act upon said clutch to effect disconnection of said power means from said roll engaging means when said roll engaging means has completed one stroke toward the end of the mandrel and return.

CHARLES ROBLEY PA'I'I'ERSON.