US1946717A

US1946717A - Coil taping machine

Info

Publication number: US1946717A
Application number: US429090A
Authority: US
Inventors: Snyder Edward
Original assignee: General Cable Corp
Current assignee: General Cable Corp
Priority date: 1930-02-17
Filing date: 1930-02-17
Publication date: 1934-02-13
Anticipated expiration: 1951-02-13

Description

Feb. 13, 1934. E NYDER 1,946,717

COIL TAPING MACHINE Filed Feb. 17, 1930 10 Sheets-Sheet 2 INVENTOR Feb. 13, 1934. SNYDER 1,946,717

con TAPING MACHINE Filed Feb. 17, 1930 10 She'etsSheet s M W INVENTOR.

ATTORNEY.

Feb. 13, 1934. E D R 1,946,717

COIL TAPING MACHINE Filed Feb. 17, 1930 10 Sheets-Sheet 4 d 4 j Q INVENTOR.

BY WATTORNEY.

Feb. 13,1934. 5, SNYDER 1,946,717

con. TAPING MACHINE Filed Feb. 17, 1950 lo Sheets-Sheet 5 W INVENTOR.

BY Q% ATTORNEY.

Feb. 13, 1934. E. SNYDER I l,94 6;7l7

COIL TAPING MACHINE Filed Feb. 17, 1930 10 Sheets-Sheet 6 fillllu' KM 6% INVENTQR.

5 A TTORNEY.

Feb. 13, 1934. E. SNYDER 1,946,717

COIL TAPING MACHINE Filed Feb. 17, 1930 10 She ets-Sheet 7 W W INVENTOR.

BY WWATTORNEY.

Feb. 13, 1934. E SNYDER con. TAPING MACHINE Filed Feb. 17, 1930 10 Sheets-Sheet 9 Q5 INVENTOR ATTORNEY Feb. 13, 1934.

E. SNYDER 1,946,717

COIL TAPING MACHINE Filed Feb. 17, 1930 10 Sheets-Sheet 1O INVENTOR.

j7/% A TTORNEY.

Patented Feb. 13, 1934 UNITED STATES PATENT OFFICE COIL TAPIN G MACHINE Application February 17, 1930. Serial No. 429,090

11 Claims.

This invention relates to coil taping machines for expeditiously applying coverings to electrical coils which coverings are made of tape wound about the coil in spiral formation to hold the layers and turns of the strand forming the coil together.' It is an object of the invention to provide an improved coil-taping machine of the kind referred to. Other objects and advantages of the invention will appear hereinafter.

An illustrative embodiment of the invention selected merely for descriptive purposes is shown in the accompanying drawings, in which:

Fig. 1 is a front perspective view of the coiltaping machine;

Fig. 2 is an end view thereof;

Fig. 3 is a bottom plan view showing the relative arrangement of portions of the driving and controlling devices of the machine;

Fig. 4 is a side elevation to enlarged scale of 20 the coil-taping machine and an electrical switch related thereto, which form a part of the machine;

Fig. 5 is a rear elevation, also to enlarged scale of the shearing appliance and its actuating means which are embodied in the machine;

Fig. 6 is a side elevation of the shearing appliance including a switch for controlling same;

Fig. 7 is a bottom plan view to enlarged scale of the controlling device for the shearing appliance;

Fig. 8 is another bottom plan view to still larger scale showing a portion of the controlling device for the shearing appliance, parts being broken away;

Fig. 9 is a rear elevation of the controlling device for the shearing appliance;

Fig. 10 is a chart showing diagrammatically the arrangement of the connections for the electrically operated parts of the machine; and

Fig. 11 is a plan view of the relay switch indi cated in Fig. 10, the switch being shown in closed position.

Among the features embodied in the coil-taping machine disclosed in the drawings are the following: An automatically operated shearing appliance for cutting the tape that is supplied to the taping appliance into predetermined lengths; an adjustable controller for the shearing appliance, operatively related with the taping appliance, whereby the length of the tape cut by the shearing appliance may be varied as required for different sizes of coils; an arrester related to the taping appliance whereby the shuttle of the taping appliance is stopped at a definite position in its race-way to facilitate insertion of electrical coils into the taping appliance and their removal therefrom, respectively before and after the tape applying operation; and electrically operated controlling means for said arrester and shearing appliance, which means are related also with the controller for said shearing appliance, whereby said controller is reset to the point of commencement of the its cycle of operation when said arrester is actuated.

The coil taping appliance Referring to the drawings, and more particularly to Figs. 1, 2 and 4, the taping appliance includes a gear housing 1 mounted upon the top 2 of a bench 3, the housing having at its upper end a circular race-way 4 in which is disposed a rotatable annular shuttle 5, the race-way and the shuttle being provided with

gaps

6 and 7, respectively, to permit insertion of a coil, (not shown) in proper position to receive the tape from the shuttle in the customary manner as the shuttle is rotated in its race-way. Conveniently the shuttle is actuated by gearing 8, (Fig. 3) that is driven by a chain and sprocket mechanism 9 connected with a clutch member 10 which is rotatably supported beneath the top 2 of the bench by a hanger 11. The clutch member 10 is actuated by a driving pulley 13 that frictionally engages the clutch member, there being a clutch lever 14 for throwing the driving pulley into engagement with the clutch member, said lever conveniently being controlled by a pedal 15 attached thereto by a connection 16.

The taping appliance preferably has in connection therewith a brake mechanism 1'7 controlled by a lever 18 which may be moved into action by applying pressure with the knee by the operator, which brake mechanism conveniently is employed to apply tension to the tape as it is wound upon a coil.

The shearing appliance Upon the top 2 of the bench is positioned a shearing appliance 19 and an actuating means therefor. The shearing appliance (Figs. 5 and 6) consists of a standard 20, a guide 21 and cutting bar 22 fixed thereon, and a cutting blade 23 pivotally supported and operatively related to said bar and guide, whereby the tape 24 when placed between the guide and bar'will be severed upon actuation of the blade. A lever 25 is pivotally supported upon the standard 20 and is operatively related with the blade 23, which lever is actuated by a solenoid 26 through the medium of a connection 27. Springs 28 and 29 are pro- The controller for the shearing appliance A controller is provided for the shearing appliance by means of which the blade 23 is actuated periodically in timed relation with the operation of the taping appliance, with which taping appliance the controller is also operatively related, whereby the said controller is progressed through its cycle of action concurrently with the first portion of that of the taping appliance. The controller, (Figs. 7, 8 and 9) has a frame 32 fixed to the under side of the top 2 of the bench, which frame includes a bracket 33. A cylindrical housing 34 is fixed upon the frame 32, and a coaxially mounted rotatable and longitudinally movable shaft 35 within the housing projects from one end thereof. Surrounding the shaft 35 within the housing 34 is disposed a solenoid 36 by means of which the shaft 35 may be actuated longitudinally. A sleeve 37 fixed in one end of the housing 34 constitutes a bearing for the shaft 35 and also for a driving gear 38 which is loosely mounted upon said sleeve. A thrust bearing 39 is interposed upon said sleeve between the driving gear 38 and the adjacent end of the housing 34, and a collar 40 fixed on said sleeve retains the driving gear in proper position thereon. Upon the shaft 35 is fixed a clutch-wheel 41 that has frictional engagement with the face of the driving gear 38, there preferably being a chafing ring 42 disposed in the face of the driving gear with which the clutch wheel has contact when in action.

In the arm 43 of the bracket 33 is fixed a stud 44 axially alined with the shaft 35, and surrounding the abutting ends of said shaft and stud is a spiral spring 45. The ends of the spring 45 are secured to the shaft and the stud, respectively by means of a pair of collars 46. When the solenoid 36 is energized, the shaft 35 is moved longitudinally against the force of the spring 45, and the clutch wheel 41 on said shaft is brought into engagement with and is pressed against the chafing ring 42 in the driving gear 38. Subsequent rotation of the shaft 35, as by means of the driving gear 38, is yieldingly opposed by the spring 45, and corresponding reactionary forces are thereby stored in said spring. These forces become effective when the shaft 35 is released upon the deenergization of said solenoid, and cause the clutch wheel to be disengaged from the driving gear and returned to its original position, or to the point of the commencement of its cycle.

The bracket 33 has fixed thereon an arm 4'7 in WhlCh is secured a sleeve 48, and upon which sleeve is journaled a disc 49 and a worm-wheel 50. A spiral spring 51 extends through the bore of the sleeve 48 and loosely around the shaft 35, one end of said spring being secured to the wormwheel and its opposite end being similarly secured to the disc 49, whereby when the wormwheel is adjustably turned, said disc 49 is correspondingly moved through the medium of said spring. The disc 49 has a post 52 projecting from its outer face, and the clutch wheel 41 has a post 53 that projects from its hub into the path of the other post 52, whereby the retracting movement of the clutch wheel imparted thereto by evolvement of the spring 45 is limited. The wormwheel 50 is adiustably turned by a screw 54 disposed in a fork 55 that is fixed on the arm 4'7. In this manner an adjustable stop is afforded whereby the clutch wheel 41 is arrested in its backward turning movement at any desired point of its revolution. The spring 51, by torsional action thereof, absorbs the shock of the impact of the post 53 against the post 52, since said spring permits of restrained turning movement of the disc 49 upon the sleeve 48.

The driving gear 38 (Fig. 3) is connected with the gearing 8 that actuates the taping appliance through gearing 56 and a shaft 57 that projects from said gearing 8, the arrangement preferably being such that as the shuttle of the taping appliance is revolved, the gear 38 of the controller is actuated at an inverse ratio to a proportionate extent, whereby numerous turns of the shuttle are made to one revolution of the gear 38.

The clutch wheel 41 has in its outer periphery a notch 58, (Figs. 7 and 9) for the reception of a finger 59 that extends from the end of a switch lever 60. The lever 60 is pivotally supported on a bracket 61 that is secured to the frame 32. The finger 59 bears normally upon the periphery of the clutch wheel 41 and the switch lever 60 is thereby sustained in one of its positions, in opposition to a spring 62 attached to said lever. When the clutch wheel 41 is turned so that its notch 58 registers with the finger 59 the switch lever 60 is moved through the action of the spring 62 to its opposite position.

0n the end of the lever 60 opposite the finger 59 is mounted a switch blade 63 that has engagement selectively with oppositely positioned pairs of

switch contacts

64 and 65 accordingly as the switch lever is positioned. The

contacts

64 and 65 are mounted on a bracket 66 that is attached to the frame 32. A stop 6'7 secured to the bracket 66 serves to limit movement of the switch lever 60 in one direction. An electro-magnet 68 is secured upon said bracket adjacent the lever 60, so that when energized the magnet actuates the switch lever in opposition to the spring 62. Thus, when the switch lever 60 is attracted by the magnet 68, the contacts 64 are electrically connected by the blade 63, and the finger 59 on said lever is withdrawn from the notch 58 in the clutch wheel, and said lever is sustained in such position by the contact of the finger 59 against the face of the clutch-wheel 41 when the notch 58 is moved from receiving position. When, however, the magnet 68 is deenergized and the clutch wheel 41, is so turned that its notch 58 is in receiving position,

the finger 59 enters the notch, and the switch lever 60 is moved through the action of the spring 62 with the result that the blade 63 is moved from the contacts 64 and into engagement with the contacts 65, as indicated in Fig. 9.

The contacts 64 are electrically connected to the solenoid 36 through conductors 69, so that when said contacts 64 are engaged by the blade 63 the solenoid 36 is in circuit therewith. The contacts 65 are electrically connected to the solenoid 26 of the shearing appliance through conductors 70, so

that when the latter contacts are engaged by the blade 63 the solenoid 26 is in circuit therewith. The magnet 68 is electrically connected to the conductors '71 and 72, (Fig. 10) through which electric current may be supplied to the apparatus from a suitable source, (not shown) said magnet having a connection 73 with the conductors '72, and another connection 74 with the conductor '71 through a switch '75, which switch conveniently may be controlled by a pedal mechanism '76.

The arrester for the taping appliance In the machine shownln the drawings, means are provided by which the shuttle 5 of the taping appliance may be caused to stop at that stage where the gaps in the shuttle and race-way 4 register. The disclosed embodiment of this means comprises a plunger 77 operated by a solenoid 78, the plunger having an arm 79 which is movable into the path of a block 80 fixed on the rim of the clutch member 10, (Figs. 1, 2 and 3) so that rotation of said clutch member is stopped when the block 80 engages said arm 79. A contracting spring 81 attached at one end to the bench, and at its opposite end with the arm 79 tends to hold the plunger 77 in its rearmost position, so that the arm 79 is held out of the path of travel of the block 80. A compression spring 82 surrounds the plunger between the arm 79 and the adjacent end of the solenoid 78, and serves. to cushion the thrust of the plunger 77 when actuated by the solenoid.

The block 80 is positioned on the clutch member 10 at such point that when rotation of the clutch member is interrupted by the engagement of said block with the arm 79, the gap in the shuttle 5 will have reached and will register with the gap in the race-way 4. In this manner, when the taping appliance is stopped, said gaps will be open for the admission of the coil to be taped. The solenoid 78 is electrically connected to the

conductors

71 and 72 through conductors 8374 and 84, respectively, and is controlled by the switch 75.

The electrically operated controlling means Fig. 10 of the drawings illustrates diagrammatically one suitable electrical control circuit for the taping machine shown in the drawings. One terminal of the solenoid 36 of the controller for the shearing appliance is connected by a conductor 85 to a relay switch 86 of any suitable type such as is shown in Fig. 11 which has an annature 86 that is yieldingly sustained in either closed or open position by a spring-pressed plunger 86" that bears against a roller 86 The switch 86 is electrically connected to the conductor 71 through the

conductors

87 and 88 and the switch 75, and an intermediate switch 89. The other terminal of the solenoid 36 is connected to the conductor 72 through conductors 69 and 90 which are controlled by the switch contacts 64. One terminal of the solenoid 26 of the shearing appliance is connected to the conductor 71 through conductors 91 and 85, relay switch 86, conductor 87, switch 89, conductor 88 and the switch 75. The opposite terminal of the solenoid 26 is connected to the conductor 72 through

connections

70 and 92 and the switch contacts 65.

The relay switch 86 is closed through the action of a magnet 93, one terminal of which is connected to the conductor 71 through

conductors

94 and 74 and the switch 75, and the other terminal of which is connected to the conductor 72 through a conductor 95. The relay switch 86 is opened through the action of an electromagnet 96, one terminal of which is connected to the conductor 71 through a conductor 97 which is controlled by a switch 98, hereinafter referred to,

conductors

87 and 88, and the

switches

89 and 75.

The switch 98, (Figs. 5, 6 and 10) is mounted in juxtaposition with the shearing appliance, adjacent the solenoid 26 thereof, and is operated by a switch member 99 fixed on the member 27 so that when the solenoid 26 is energized and the member 2'7 and the blade 23 are actuated, the switch 98 is closed by the member 99, which has the efl'ect of closing the circuit through the magnet 96, causing the relay switch 86 to open.

The switch 89, (Figs. 4, 5, 6 and 10) is mounted on the standard 20 of the shearing appliance which is located adjacent the housing 1 of the taping appliance. The standard 20 has pivoted in its upper part a gate 100 which is disposed so as to close the gap 6 in the race-way 4, and to serve as a guard for the shuttle 5. A retracting spring 101 connected with the gate 100 and the standard 20, tends to hold the gate open or closed accordingly as positioned by the operator.

Referring particularly to Fig. 4, a lever 102 pivoted on the standard 20 has operative relation with the switch 89, and a retracting spring 103 connected with said lever and the standard 20, normally tends to close said switch. The gate 100 when turned to its open position bears against one end of the lever 102, causing said lever to tilt and open the switch 89, which causes the circuit through the connection 88 to be broken.

The operation In the operation of the machine shown and described, the driving pulley 13 is actuated continuously by a means such as a motor 104 through the medium of a suitable power transmitting mechanism 105, and the tape 24 is supplied from a spool 106, (Fig. 2) through

guides

107 and 108, to a point above the bench and back of the taping appliance within convenient reach of an operator stationed in front of the taping machine. The tape guides 107 and 108 preferably will be of suitable form such as will prevent the tape from becoming twisted as it is fed to the taping appliance, and from becoming otherwise disarranged when severed by the shearing appliance.

The main switch 75 when in normal position connects the conductor 71 and the conductor 88. When the pedal 76 for the switch 75 is depressed, connection between the conductor 71 and the conductor 88 is broken, while connection is established between the conductor 71 and the connection 74, whereupon the magnet 68 becomes energized and the switch lever 60 is actuated, so that the finger 59 of said lever is Withdrawn from the notch 58 in the clutch wheel 41, and the blade 63 is moved into closing relation with the contacts 64, and also the magnet 93 is energized causing the relay switch 86 to close.

The clutch wheel upon being thus released, (Figs. 7, 8 and 9) is turned backwardly through the torsional reaction of the spring 45 to its normal position, where it is stopped by the engagement of the post 53 with the post 52. The lever 60, because of the engagement of the finger 59 with the clutch wheel 41, is maintained in the position to which it was attracted by the magnet 68, so that the circuit is held closed through the contacts 64 and the blade 63.

The solenoid 78 also is simultaneously energized, so that the arrester is moved into engaging position with respect to the block 80. At this instant, by momentarily depressing the clutch pedal 15, the driving pulley 13 is moved into engagement with the clutch wheel 10, which thereupon is turned to an extent limited by the engagement of the block 80 with the arm 79 of the arrester. The switch 75 is then returned to its normal position by releasing the switch pedal 76, thereby opening the circuit through the

conductors

71 and 74, and reestablishing a circuit through the

conductors

71 and 88. In this manner the various members oi. the apparatus are set at their respective points for commencing the cycle of'operation of the machine.

Initially, the tape 24 is drawn by the operator between the guide 21 and the cutting bar 22, and is applied to the coil, (not shown) to be taped, which coil is then inserted through the gaps in the race-way and the shuttle in proper position to receive the tape in the customary manner. The gate 100 is then closed over the gap in the raceway, which permits the switch 89 to be closed automatically through action of the spring drawn lever 102, whereupon the solenoid 36 of the controller becomes energized and the clutch wheel 41 is thereby drawn into engagement with the 'driving gear 38. The clutch pedal 15 is next depressed to engage the driving pulley 13 with the clutch member 10, whereupon the shuttle of the taping appliance and the driving gear 41 of the controller are actuated through the

intervening mechanism

9 and 56 connected respectively therewith.

During the progress of the shuttle, the tape is drawn from the spool into the taping appliance and applied to the coil as said coil is maneuvered by the operator. As the taping operation progresses, the clutch wheel 41 through its engagement with the driving gear 38 is correspondingly turned upon its axis in opposition to the torsional resistance of the spring 45 until the notch 58 in the clutch wheel reaches and receives the finger 59 of the lever 60. The lever 60 is then actuated by the spring 62 into its opposite position, whereupon the circuit through the contacts 64 is broken, and a circuit is established through the contacts 65. Thus, the circuit through the solenoid 36 is opened and the clutch wheel 41 released from engagement with the driving gear 38.

The circuit through the solenoid 26 of the shearing appliance is completed, and the shearing appliance is actuated, whereupon the tape is severed and the switch 98 is closed. Upon the closing of the switch 98 the magnet 96 is energized which causes the relay switch 86 to re-open and thus break the circuit through the solenoid 26, re-opening the switch 98. Operation of the taping appliance is continued until the severed portion of tape, accumulated upon the shuttle, has been applied to the coil, after which the gate is opened and the main switch is again moved into contact with the conductors '71 and 74, causing the resetting of the apparatus preparatory to a repetition of the cycle of operation.

Preferably, the controller for the shearing appliance is so constructed, that by adjustment thereof severance of the tape by the shearing appliance may be made to occur at such period in the cycle of operation of the apparatus, that the length of the severed portion of the tape that is drawn into the taping appliance may be varied suitably as required for coils of different sizes. Such arrangement is included in the controller for the shearing appliance, wherein the provision is made for adjustably positioning the post 52, so that the backward turning movement of the clutch wheel 41, when released from engagement with the finger 59, is limited more or less in extent. This is accomplished by turning the adjusting screw 54, such movement, through the medium of the worm-wheel 50 and the spring 51, being correspondingly imparted to the disc 49. In this manner the travel of the clutch wheel 41, when turned by the driving gear 38 from the commencement of its cycle to the point where reception of the finger 59 into the notch 58 place, may be adjustably varied and the operating period of the shearing appliance thus timed to occur sooner or later accordingly. By means of such adjustment, the length of the tape supplied to the shuttle may be regulated, so that the amount applied to each coil will be just sufficient to form a complete covering therefor.

It will be understood that the invention may be variously modified and embodied within the scope of the claims.

I claim:--

1. The combination in an apparatus for applying tape to electrical coils, of ataping appliance having a race-way and an annular shuttle therein, each provided with a gap; driving means for said shuttle including a control clutch; an arrester operatively associated with said clutch whereby said shuttle may be stopped in the raceway at a point when its gap registers with that in said raceway; means for supplying tape to said taping appliance; a shearing appliance for automatically severing the tape supplied from said last mentioned means; a controller for said shearing appliance; electrical means operatively associated with said arrester, shearing appliance and controller for actuating the same respectively; and manually operated means for controlling said electrical means.

2. The combination with an appliance for winding tape upon electrical coils, which appliance includes a clutch controlled driving means therefor, of an arrester operatively associated with the clutch of said driving means; means for supplying tape to said taping appliance; means for automatically severing the tape supplied from said last mentioned means; a controller for said severing means; means permitting adjustment of said controller while the appliance is operating to vary the length of tape severed; electrical actuating means operatively associated with said arrester, shearing appliance and controller; and manually operated means for controlling said electrical means.

3. In apparatus having a tape winding means, the combination of an electrically actuated stop appliance therefor, and an electrically actuated tape shearing means, an appliance for controlling the operation of said shearing means, comprising a clutch mechanism operatively connected with said winding means, an electro-magnet for controlling the operation of said clutch; an electric switch engaged and released by said clutch mechanism, there being a pair of contacts closed only while said switch is engaged respecting said mechanism, and another pair of contacts that are closed only while said switch is released, a second electro-magnet for moving said switch into engaged position, a circuit for said second magnet and said stop appliance, a second circuit for said first magnet, including the former pair of contacts, a third circuit for said shearing appliance including the other pair of said contacts, and a manually operated switch through which energy may be supplied to the first mentioned circuit when in one position, and to the other of said circuits when in its opposite position.

4. The combination in apparatus having a tape winding means and an electrically actuated tape shearing means, of an appliance for controlling the operation of said shearing means, comprising a clutch mechanism operatively related with said winding means; an electro-magnet for governing said clutch mechanism; a switch engaged and released by said clutch mechanism, there 15o being a pair of contacts closed only while said switch is engaged respecting said mechanism, and another pair of contacts that are closed only while said switch is released, a second electromagnet for moving said switch into engaged position, a circuit for said second magnet, a second circuit for said first magnet including the former pair of contacts, a third circuit for said shearing appliance including the other pair of said con tacts, and a manually operated switch through which energy may be supplied to the first mentioned circuit, when in one position, and to the other of said circuits when in its opposite position.

5. Included with the substance set forth in claim 4, a relay switch interposed in said second circuit, closing and opening magnets for said relay switch, said closing magnet having a connection whereby said relay switch is closed when said first mentioned circuit is energized, and a switch-controlled connection for said opening magnet associated with said second circuit and said shearing means in such a manner that said relay switch will be opened upon the operation of said shearing means.

6. Included with the substance set forth in claim 4, a relay switch for controlling said second circuit, means associated with said first mentioned circuit for closing said relay switch, and means operated by said shearing means for opening said relay switch. 7

7. Included with the substance set forth in claim 4, a relay switch for controlling said second circuit, means for automatically closing said relay switch when the first mentioned switch is engaged, and means for automatically opening said relay switch when said first mentioned switch is released.

8. Included with the substance set forth in claim 4, a movable shuttle gate for said winding means, and another switch connected in said second circuit and operatively connected with said gate whereby said second circuit may be broken by movement of saidgate to open position.

9. The combination in apparatus having a tape applying means and an electrically operated tape severing appliance, of a controller for said appliance having a rotatable driving member operatively associated with said means; a

shaft having rotatable and longitudinal movement, axially alined with said member; a clutch Wheel fixed on said shaft and engageable with said member; a spring device disposed to restrain rotary and longitudinal movements of said shaft; an electro-magnet for causing engagement between said driving member and clutch wheel opposed by said spring device; an adjustable stop device and engaging means acting to limit rotary movement of said clutch wheel; a switch engaged and released by said clutch wheel; a second electro-magnet for moving said switch into engaged position; a circuit for said magnet; a second circuit for said first magnet closed by said switch only when in engaged position; a third circuit for said shearing appliance closed by said switch only when in released position; and a manually operated switch through which current may be supplied selectively to said first mentioned circuit and to the other circuits.

10. The combination in apparatus having a tape applying means and an electrically operated tape severing appliance, a controller forsaid appliance having a driving member operatively associated with said means; a clutch engageable with said member and having rotatable and longitudinal movement; means normally tending to maintain said clutch in disengaged position; an adjustable stop mechanism for limiting rotation of said clutch from its normal disengaged position; electrical means for moving said clutch into engagement with said driving member; a movable switch engaged and released by said clutch; meansfor moving said switch into engaged position; and circuits for said electrical means and said severing appliance controlled selectively by said switch.

11. In a tape-wrapping apparatus, the combination of means having a discontinuous, subs':antially annular raceway, a tape-wrapping shuttle mounted in said raceway, driving means for said shuttle to cause the shuttle to travel in the raceway, means for substantially bridging the gap in said raceway, and control means for said'driving means, automatically operative when said bridging means is moved out of the gap, to interrupt further movement of the shuttle in the raceway.

EDWARD SNYDER.