US2635530A - Coil binding machine - Google Patents

Description

April 21, 1953 F. E. WlRTZ ErAL' 2,635,530

COIL BINDING MACHINE Filed March 28, 1951 14 Sheets-Sheet 1 FEA ls EIg/VENTORi 0 METz (7 7 (/QH/v M/(LoVE-B BY w, M @124, ATTOE/VEYS 7 INVENTORS FeA/vc/e E Merz F E WlRTZ ET AL COIL BINDING MACHINE April 21, 1953 Filed March 28, 1951 April 21, 1953 F. E. WIRTZ EI'AL COIL BINDING MACHINE Filed March 28 1951 14 Sheets-Sheet 5 April 21, 1953 F. E. WIRTZ ETAL 2,635,530

I (3011. BINDING MACHINE Filed March 28, 1951 14 Sheets-Sheet 4 a 225 M 9 ii INVEN TORS FeAA/c/s E. Merz uoH/v r1. A2 0 V518 M69. ,47' TOBA/E-YS April 21, 1953 F. E. WIRTZ ETAL COIL BINDING MACHINE 14 Sheets-Sheet 5 Filed March 28, 1951 Fem/0A5 E- W/eTz #ua'v ,4 TTOIZNEYS A ril 21, 1953 F. E. wm'rz ETAL 2,635,530

COIL BINDING MACHINE INVENTORS Fen/v60 1 haerz (/OHA/ M moms-1e M 47- oe/V5145 April 21, 1953 F E. WIRTZ ETAL.

COIL BINDING MACHINE l4 Sheets-Shet 7 Filed March 28, 1951' i INVENTORS Fe/wc/s E VV/e-rz:

z/o/m M A20 V513 w 141' T E/V YS BY AM April 21, 1953 F. E. WlRTZ ETAL COIL BINDING MACHINE 14 Sheets-Sheet 8 x 5 a Y m2 we 4% 6 W W w M M r w A- WM Ad v.

Filed March 28, 1951 April 21, 1953 F. E. WlRTZ ETAL 2,635,530

COIL BINDING MACHINE Filed March 28, 1951 14 Sheets-Sheet 9 I L L r Q INVENTORS a FeA/vc/sE'Merz X April 21, 1953 F. E. WIRTZ ETAL COIL BINDING MACHINE Filed March 28, 1951 8AM AS sscrlolv 8 l4 Sheets-Sheet 1O SECT I/ c k @AME- A5 IN V EN TORS FGA/VG/ E Werz X I BY c/o/m/ M KLoMEE,

April 21, 1953 F. E. WIRTZ ET AL COIL BINDING MACHINE Filed March 28, 1951 CAM 14 Sheets-Sheet ll WELL I NV EN TORS BY 't/OH/V M ALovee 1341/ /4TTOENE-Y$ FeAMc/s E- Merz X April 21, 1953 F. E. WlRTZ ETAL COIL BINDING MACHINE 14 Sheets-Sheet 12 Filed March 28, 1951 INVENTORS fen/vc/s .6. Merz Max/N M Moi 56 BY ,zi/ ,4?- o em? Ys A ril 21, 1953 F. E. WlRTZ EIAL. 2,635,530

COIL BINDING MACHINE Filed March 28, 1951 14 Sheets-Sheet 14 60 0 A/Ql.

Patented Apr. 21, 1953 COIL BINDING MACHINE Francis E. Wirtz and John M. KloVen-Dayton, Ohio, assignors to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application March 28, 1951, Serial No. 217,904

(CI. IOU-) Claims.

This invention relates to a machine for tying the coils of an electromagnetic device.

Various methods are used to form and apply windings to electric machines. In some instances the coils are wound'directly upon the part of the electric machine adapted to receive them, and in other instances the coils are initially wound on forms or matrices, collapsible to permit removal of the wound, loop-shaped coil for purposes of placing the pre-formed coil upon the part of the electric machine designed to receive and hold it.

Some electric machines require a multiplicity of loop-shaped coils, and to produce them a collapsible form or matrix, having provisions for winding a plurality of coils from a continuous, single wire, is used. This necessitates bindin or tying the convolutions of each coil together in order to prevent their complete disintegration when the winding form or matrix is collapsed to permit removal of the coils.

It is among the objects of the gre'sent invention to provide an automatic machine which is adapted to receive a form or a plurality of forms upon which coils have been wound and successively tie the convolutions of each coil wound upon said form or forms so that When said forms are collapsed to remove the coils wound thereon, each coil is separately held together and complete disintegration thereof prevented.

A further object of the present invention is to provide an automatic machine adapted to tie the several coils wound upon a collapsible form in such a manner that the binding or tying medium, a wire in this machine, may easily be removed after the tied coil has been placed and secured in proper position on the part of the electric machine designed to receive it. For purposes of economical commercial production and to facilitate removal after assembly, the binding or tying medium must be readily removable yet sufiiciently secure to hold the convolutions of the coils together for handling purposes.

Another object of the present invention is to provide a coil tyin machine which will be rendered inactive automatically whenever, during the operation of the machine, the form, holding the coil, is not properly clamped and held together for the tying operation.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accom-- panying drawings. wherein a preferred embodiment of the present invention is clearly shown.

, In the drawings:

Fig. l is an end view of the automatic coil tying machine.

Fig. 2 is a front side elevation of the machine.

Fig. 3 is a front side view of the power driven mechanism in the intermediate compartment of the machine.

Fig. 4 is a fragmentary view of the machine showing the various parts of the machine mounted upon the top platform.

Fig. 5 is a plan View of a portion of the machine shown in Fig. 4.

Fig. 5A is a detail, fragmentary view of part of the coil clamping control mechanism. This view is taken along the line and in the direction of the arrows 5A-5A of Fig. 5.

Fig. 6 is a composite, plan view, at reduced scale, of the power driven mechanism shown in Fig. 3.

Fig. 7' is a sectional view of the needle carrying housing and a portion of the coil supporting clamp mechanism.

Fig. 3 is a detail view, partly in section, showing the binding wire feeding mechanism.

Fig. 9 is a detail, sectional view showing a portion of the needle revolving mechanism.

Fig. 10 is a plan View of the power transmitting mechanism of the machine.

Fig. 11 ilustrates the power transmission mechanism for revolving the tying needles.

Fig. 12 illustrates the power transmission mechanism for reciprocating the needle housing.

Fig. l3 illustrates the power transmission mechanism for shifting the coil supporting clampin mechanism in both directions.

Fig. 14 is a detail view of the cam of the needle reciprocating mechanism.

Fig. 15 is a similar view showing the cam of the needle revolving mechanism.

Fig. 16 illustrates the cam of the coil supporting. clamp shifting mechanism.

Fig. 17 is a detail, fragmentary view of the coil supporting and clamping device.

Fig. 18 is a fragmentary, part sectional view showing the binding wire locating and shearing mechanism.

I Figs. 19 to 34 inclusive show in schematic form, the progressive functions of the needles at succissive intervals during a cycle of machine opera ion.

Fig. 35 is a diagrammatic view showing the relative functions of the coil indexing mechanism, the needle reciprocating mechanism, the wire shearing mechanism, the needle revolving mechanism and the wire feeding mechanism during a complete cycle of the machine.

Fig. 3c is a wiring diagram illustrating sche matically the electrical control mechanism gov-r erning machine operation.

3. Fig. 37 is a part sectional view showing one collapsible winding form on the arbor of the machine.

The machine of the present invention and as illustrated was particularly designed to receivea plurality of collapsible forms or matrices upon each of which six separate coils are wound in loop form. Inasmuch as all of the coils on the several forms are wound from a single or multiple parallel strand of wire, all coils are tied together while on the forms. Each of the two forms or matrices shown held in the machine in Fig. 2 of the drawings comprises a plurality of interfitting sections which when placed together form six side-byside spools upon which wire may be wound to provide six loop shaped coils. These spools have a rectangular core portion, the two center ones being the larger in transverse dimensions, the next two adjacent core portions being smaller than the two central ones and the two outer core portions being the smallest. Thus the six rectangularly shaped loop coils wound upon the form are of three different sizes each coil having a. predetermined number of convolutions of wire. The six coils all tied together by the single wire or parallel wires from which they are wound, are assembled in the stator of the electric motor which in this instance forms the power device of a sealed-in unit of a refrigerator system.

As has previously been stated, in order to avoid complete disintegration of the coils when the collapsible form, on which they are wound, is disassembled for coil removal purposes, it is necessary separately to place a binding cord or wire about the convolution of each, separate coil portion. The tie or bind must be made in such a manner that each must be readily removable when the coil has been assembled into the motor stator. Removal of all ties is especially necessary in sealed-in units for refrigeration systems as foreign matter, which might be loosened and circulate in the closed circuit, is extremely undesirable if not a hazard tending toward complete stoppage of the refrigerant circulatory system.

GENERAL DESCRIPTION OF MACHINE FUNCTIONS (1) Clamping and indexing This machine as aforestated, is adapted to receive two collapsible winding forms and bind or tie each of the respective coils on said forms. A stationary arbor receives the two hollow winding forms which are slidable on the arbor so that the various coils on the forms may successively be moved into the binding position and when all of the coils have been bound may be returned on the arbor to their original starting position. The forms, being collapsible to permit removal of the convolutions of the respective coils, must be securely held together while in the machine to prevent disintegration or flying apart of the windings thereon. For this purpose clamping mechanism i provided, consisting of a rigid clamp jaw and a hinged clamp jaw, each jaw being supported on a block, both of which are secured together in spaced relation and slidable on the machine longitudinally of the arbor. The rigid jaw is engaged by one coil carrying form on the arbor and the second form adjacent thereto is engaged and securely held against its adjacent form by the hinged jaw which is manually operable into its prostrate position to permit placing of the form upon the arbor and is moved into its erect position as shown in Fig. 2, to engage and hold the forms clamped together on the arbor. A control switch normally open and connected in circuit with the motor which drives the machine, is closed by the clamp actuating lever when said lever is manually operated to move the hinged clamp into its form engaging and clamping position. As long as the clamp jaws securely hold the coil-carrying form clamped therebetween the control switch is maintained in circuit-closing position during cycling of the machine. However, if, for some reason, the hinged jaw releases its clamping eflort upon the forms on the arbor, permitting the forms to separate, then the control switch is automatically actuated to open the driving motor circuit and stop the machine. Suitable mechanism, later to be described detailedly, moves or indexes the clamping mechanism intermittently in one direction to locate each coil in the binding position and when all of the coils are bound returns the clamping mechanism into its normal, initial position relatively to the arbor.

(2) Binding wire feed, holding and cut-017 The wire supply for binding the coils is led from a supply spool over a pulley supported by the machine. An intermittently actuated one-way clutch operates one of two engaging feed rolls between which the binding wire passes and which draw the wire from the supply spool, through suitable straightening rolls and push it through a suitable conveyor tube to and through suitable shearing and holding blocks located on the machine at the bindin location thereon. Driving means for the feed roll clutch is provided for feeding the wire intermittently to the shearing and holding block at properly timed intervals.

A shearing knife cooperatively carried by the shearing block is connected with driving mechanism which intermittently operates said shearing knife to sever a predetermined length of the binding wire from the source of supply at properly timed and recurrent intervals whereby a proper length of binding wire is made available to be drawn against and twisted about each separate coil when it is indexed or moved into the binding position on the machine.

COIL BINDING MECHANISM OF THE MACHINE The severed length of binding wire held in the holding blocks at the binding location on the machine is grasped, drawn against and twisted about the convolutions at one side of the coil which is being held in the binding location on the machine. The mechanism for grasping, drawing and twisting the binding wire comprises two crochet type needles held in parallel spaced relation directly above the binding location on the machine and being reciprocative toward and away from the binding wire held at the binding location and also being revolvable about the axis of the element supporting said needles. Suitable mechanism for actuating the needles is provided, one mechanism moving the needles downwardly toward the severed piece of binding wire in order to bring the needles into graspin relation with said piece of binding wire and being movable in the opposite direction to draw the binding wire from the holding blocks around the convolutions at one side of the coil. The other actuating mechanism for the needles revolves the said needles about the axis of their supporting and driving shaft so that the grasped wire, drawn about the coil, will be twisted around the coil securely to hold it against disintegration when the coil is finally removed from the collapsible winding form. The final upward reciprocation of the needles sheds the binding wire about the coil from said needles and thus permits a subsequent indexing which moves the next adjacent coil into the binding position.

The aforedescribed functions are repeated during one complete cycle of the machine to bind twelve coils, six of which are wound upon each one of two adjacently clamped winding forms in the machine, each set of six coils having two coils of the same transverse dimensions and largest of them all, two equally sized coils smaller than the previously mentioned two and two coils smaller than either of the two just mentioned. All of the coils on the two spools, as previously mentioned, consist of a plurality of separate convolutions all tied together by the single or plurality strand of wire from which all coils are wound.

THE BODY OF THE MACHINE As shown in Figs. 1 and 2, the machine consists of a framework rectangular in shape, said framework 25 having an inside partition 2| forming a lower compartment 22 and an upper compartment 23, the top of the frame 24 providing a platform up on which certain elements of the machine are mounted.

POXVER TRANSMISSION MECHANISM OF THE MACHINE In the lower compartment 22, as shown in Fig. 2, there is provided an air reservoir 25 fed from any suitable source of air pressure and connected by any suitable means, not shown, with a clamp returning device to be described later detailedly. The main driving motor '26 of the machine is also located within the lower compartment 22, said motor 26 being connectible with any source of power and having a driving pulley 2'! for receiving a belt 28 which is in operative engagement with a pulley 29 supported on the shaft 32, journaled in and extending across the upper compartment 23 in any suitable manner. A standard 3! provides a journal box which rotatably supports the shaft 39 and is secured within the upper compartment 23 in any desirable manner.

The shaft has a hand-wheel 32 secured thereto exteriorly of the machine frame or housing 29. This hand-wheel 32 provides means by which the machine may be manually operated, for any desirable reason, such as completing adjustments or moving parts of the machine into any desirable position for checking or adjustment purposes. Onthe end of shaft 35 opposite to which the hand-wheel 32 is secured there is attached a pinion 35 of predetermined size which meshes with and drives a gear 35. As shown in Fig. 10, this gear 35, of a size so as to be driven at a predetermined speed by the pinion 35, is attached to a shaft 37 rotatably supported in the journal box of a standard 38 also rigidly mounted withinthe compartment 23. This shaft 3'! has a gear 39 secured at the end opposite gear 35, gear 39 in turn meshing with gear 45 which is identical in size to the gear 3d. Gear 42 is secured at one end of shaft 4! rotatably supported in the journal box of standard 42 rigidly mounted within compartment '28 of the machine, the other end of shaft 4! having cam 43 secured thereto and a pinion 44. This pinion 44 meshes with a gear 45 mounted upon shaft 45 which is rotatably supported by standard 47 Within compartment 23. The relative sizes of the pinion 4d and its meshing gear 45 are such that gear 45 will make one revolution for each six revolutions of the pinion 44. Shaft 46 upon which gear 45 is mounted also supports cam 55 secured to gear 45 so as to rotate therewith. Shaft 45 also supports a pinion 5| driven by the shaft to drive the gearv 52 meshing therewith and mounted upon the shaft 53 journaled in the standard 54 secured within the compartment 23. The relative sizes of the pinion 5| and its connected gear 52 are such the gear 52 will be rotated one revolution. for each two revolutions of its driving pinion 5|. A cam 55 is operatively secured to the gear 52 so as to rotate therewith. From the aforegoing description of the driving mechanisms in compartment 23 it may be seen that suitable gearing initially driven by'the electric motor 25 operates cams 43, 50 and 55 at predetermined speeds relatively to one another. The cam 43 may be termed the needle revolving cam inasmuch as it acts through its operative connections with the needles to revolve said needles in either direction for purposes and in a manner to be described. The cam 50, which may be termed the needle reciprocating cam, acts through its connections with the needles and particularly the needle supporting housing, to reciprocate said needles toward and away from the coil to be bound as will be detailedly described. The cam 55 which may be termed the coil-form indexing cam, operates through its connections with the coil clamping mechanism intermittently to move the clamped forms along the arbor of the machine in one direction of the cam, having provisions when all of the coils have been completely bound to render the form returning air cylinder effective to move the coil supporting forms back to their original positions upon the arbor.

The platform 24 supports various parts of the machine which cooperate to perform the coil tying or binding operation.

FORM CARRYING AND CLAMPING MECHANISM Figs. 2, 4, 5 and 5A clearly illustrate the mechanism which supports the coil bearing and clamping mechanism. Upon the platform 24 there is secured a. rigid standard 60 which supports an arbor 6| so that said arbor extends longitudinally above the platform 24 and substantially parallel thereto. This arbor receives the collapsible coil carrying forms 62 and 83 which are slid upon the arbor 6| by the operator; The Figs. 7 and 3'7 illustrate the collapsible form shown in dot and dash lines, in Fig. 2. Each form consists of two oppositely disposed body portions 62a and 62b presenting six side by side spool areas, the two inside ones being the. largest transversely, the next two being smaller and the final, outer two being the smallest in transverse dimensions. When applied to the arbor 6| of this machine, each. form has a winding on each spool area, the six windings on a form being of a single, continuone wire. 62c and thus tied, together as shown in Fig. 3.7. The arbor 6|, as shown in Fig. '7, spreads the form bodies to hold the windings thereon substantially taut and intact. When removed from arbor 61., the form bodies are easily removable from the wire convolutions. In order to prevent disintegration or flying apart of the windings on the form, said forms must be placed over the arbor. The forms are clamped together tightly to assure proper location and indexing. For this purpose clamping mechanism has been provided on the machine. Two spaced and parallel rods 64 and 65 are secured to the platform 7 24 so as to be slightly above said platform, said rods forming slide bars for the clamping mechanism. The clamping mechanism consists of two clamping jaws 66 and 61 the former being erect and rigid, the latter being movable from a prostrate position substantially parallel to the platform 24 into the erect position, as shown in Fig. 4, in which said clamping jaw is substantially at right angles relative to said platform. Each jaw is carried by a block, the jaw 66 by block 66 which is slidably mounted upon the slide bars 64 and 65 and rigidly carries the jaw 66 so that it constantly is in its erect position as shown in Fig. 4, the jaw 61 being hingedly carried 'by the block 69 also slidably carried upon slide bars 64 and 65, jaw 61 being movable between its prostrate and erect positions relative to its support block 69. Both supporting blocks are secured together in spaced relation in any suitable manner so that both may move in unison along the slide bars 64 and 65 and remain in proper spaced relation. When the coil supporting forms 62 and 63 are placed upon the arbor 6| by the operator the coil supporting form 62 is moved to abut against the rigid clamping jaw 66 while the hinged clamping jaw 61 is in prostrate position. After the coil supporting form 62 engages the clamp 66 the hinged clamp 61 is actuated from its prostrate position to its erect position as shown in Figs. 2 and 4, at which time said clamping jaw 61 engages form 63 and securely clamps it against its associate form 62 on the arbor 6 I.

A rod 16 is rotatably carried by the block 69, said rod having the jaw 61 attached thereto so that said jaw may be rotated relatively to its supporting block 69. Rod 16 also has a lever H attached to it, this lever being connected to the rod 13 by any suitable means which causes the lever 1| and rod 16 to be moved positively counterclockwise by the pushing effort of rod 13 toward the left as regards Fig. 2 and which applies a constant, yieldable pressure against lever H in a clockwise direction as the rod 13 exerts a pulling effort upon lever 1| toward the right whereby rod 10 is rotated to move jaw 61 into its erect, form-engaging position. In this machine, the yieldable connection between lever 1| and rod 13 consists of a slidable saddle on rod 13 and engageable on one side with a shoulder on the rod 13. The other side of the slidable saddle abuts against a spring 12 about the rod 13 and held thereon by lock nuts on said rod. Rod 13 has its opposite end pivotally secured to a lever 14 at a predetermined point 11 between the free end of said lever 14 and the end thereof attached to the rod 15. Rod 15 is supported on the block '68 carrying the rigid clamp jaw 66. At the end of rod 15 opposite the lever 14 there is attached a crank 16 which is manually operable to rotate the rod 15. When the crank 16 is rotated counterclockwise as regards Figs. 4, and 5A, the rod 13, secured to the lever 14, moves toward the left and thus the shoulder on rod 13, engaging the saddle to which lever 1| is attached, positively actuates the hinged clamping jaw 61 from its erect to its prostrate position in which it lies substantially parallel to the platform 24. This operation is necessary to permit removal from and placing the coil supporting forms upon the arbor 6|. After the coil supporting forms 62 and 63 are placed on the arbor and moved to engage the rigid clamping jaw 66, the clamp 16, operated clockwise by crank 16 and its rod connection 13, moves the hingedly clamped jaw from its prostrate to its erect position as shown in Figs. 2 and 4.

The relative positions of the rod 13 and lever 14 to which it is pivotally connected, at the time jaw 61 engages the coil carrying form 63 are shown in Fig. 5A by the dot and dash lines. At this time spring 12 is not compressed. In order to compress said spring so that it exerts a constant clockwise turning effort upon lever 1| to maintain the jaw 16 in proper clamping engagement with the form 63, the lever 14 is moved beyond its dot and dash line position and into its full line position as shown in the Fig. 5A. In this position the center line of rod 13 and therefore its pivotal point of connection 11 with lever 14 lies beneath the axis of the rod 15, supporting lever 14, thereby providing an over-center, toggle connection which locks the lever 14 in this position under the tension of spring 12 until manual operation of crank 16 counterclockwise again moves lever 14 toward the dot and dash line position as indicated in Fig. 5A.

A safety switch, in circuit with the main driving motor of the machine, is controlled by the afore-described clamp-operating mechanism. So that as long as the clamp-operating mechanism under the effect of spring 12 functions securely to hold the coil-supporting forms in properly clamped position between the jaws 66 and 61, said switch will maintain machine operation. However, if for any reason the clamping efiort upon the coil-supporting forms 62 and 63 is relaXed or released and thereby permits loosening of the coils on the forms, this switch is automatically actuated to break the motor circuit and stop the machine. Fig. 8 together with Figs. 2, 4 and 5 illustrate this safety mechanism. The switch is mounted upon the platform 24, said switch normally closing the electric circuit in which it is connected. Upon the platform 24 there is mounted a. bracket 8| which has a rod 82 hingedly supporting a block 83. This block provides a track 84 which is substantially parallel with the clamp-supporting slide bars 64 and 65. Rod 82 also carries an arm angularly shaped to extend over and above the actuating button or member of the switch 86. A spring 86, interposed between the platform 24 and the end of the angular arm 85, normally yieldably urges the arm 85 to rotate rod 82 and its attached block 83 so that arm 85 engages the operating member of the switch 80 to hold it in circuit breaking position. The lever 14 of the clamp-actuating mechanism carries a roller 81 which, when the clamping mechanism is moved into form-clamping position. engages the track 84 as shown in Fig. 5A, moving said track and its block 83 to raise the arm 65 away from said switch 80 against the effect of spring 86 whereby said switch 80 is permitted to close its circuit. The roller 81 on the lever 14 of the clamp-actuating mechanism rides on the track 84 as the clamping mechanism is moved along the slide bars 64 and 65 intermittently to bring the respective windings or coils on the forms 62 and 63 into the tying position on the machine. Thus, if the clamping mechanism tightly holds the forms 62 and 63 clamped between the jaws 66 and 61 during the entire cycling of the machine, the arm 85 is maintained out of engagement with the switch 80 and permit it to remain closed. However, if for any reason the hinged clamping jaw 61 is moved to relax its clamping effort upon the forms, lever 14 will be moved to disengage its roller 81 from the track 84 permitting the spring 86 to move the arm 85, block 83 and its attached track 84 in a manner to cause arm 85 to engage switch 80 and actuate it to break its circuit and thus stop the machine.

BINDING WIRE SUPPLY AND FEED MECHANISM Figs, 2, 4, and 8 show the binding wire supply and feeding mechanism mounted upon the platform 24. The binding wire supply i directed over roll 90 and carried upon a standard 89 secured to the platform 24 adjacent the rigid standard 60. From the roll 90 the binding wire 9| extends through a guide block 92 secured to a block 93 which carries three straightening rollers 94, 95 and 95 in staggered relation and between which the wire passes in order to remove bends or kinks therein. Another block 91 mounted upon the standard 89 adjacent the block 93 carries three wire straightening rollers 98, 99 and Ill!) the axes of which are angularly displaced relatively to the axes of the straightening rollers 94, 95 and 9.6. Two frictionally engaging rollers IGI and I122 have the binding wire QI extending therebetween, these rollers providing the motivating means for feeding the wire to the binding location on the machine. Roller IilI is attached to a shaft H33 (see Fig. 8), which is secured to one portion of a oneway clutch I34, of any suitable design. The other portion of the one-way clutch has an arm IE5 extending therefrom by means of which said clutch portion is oscillated in one direction and the other for actuating the feeding roll supporting shaft I03. This clutch tilt is of the standard type so that when the portion thereof with extending arm I95 is moved counterclockwise its cooperating portion will actuate the attached shaft 983 .in a counterclockwise direction so that the feed roll IDI is operated in the same counterclockwise direction as regards Fig. 4. However, when the extending arm Hi5 on the one clutch portion is actuated in the opposite or clockwise direction the clutch mechanism is released and the portion of which the arm I05 forms a part can rotate clockwise relatively to the portion to which the shaft M3 is secured. Thus, as the arm I05 is moved counterclockwise the feed r011 IBI with the binding wire clamped between it and its associated roll IE2 moves the binding wire forwardly or toward the left as regards Fig. 4, a distance in accordance with the range of movement of the arm 595 counterclockwise. Reverse movement of said arm m5 clockwise moves only one portion of the clutch backward, the other portion of the clutch, operatively connected to the feed roller IOI, remaining immovable. In order to assure immova bility of the clutch portion secured to the feed roll Isl, as the clutch portion having lever arm I65 moves clockwise, the clutch portion attached to feed roll IBI has a drum I06 (see Fig. 8) frictionally engaged by a brake band Ill'i, one end of which is attached to the shorter end of a lever H38 pivoted on the standard 89 at M9, the other end of said brake band it! being secured to the longer end of lever I98. A spring H9 is anchored between the lever 38 and the platform 24 urging the lever its clockwise about its pivotal support 889 and thereby exerting a braking effort upon the one clutch portion attached to the shaft its of the feed roll it! when the portion having arm m5 is rotated clockwise, as regards Fig. 4 and practically no braking effort upon said one clutch portion when the clutch portion having the arm m5 is moving counterclockwise to actuate the feed roll WI for drawing binding wire from the roll 8!) and feeding it toward the tyin position on the 10" machine. The arm H15 of the one clutch portion has a link II2 connected thereto which extends through an opening in the platform 24, into the compartment 23 of the machine and is actuated by mechanism to be described detailedly hereinafter.

As the feed rolls I00 and m2 move the binding wire intermittently from the spool toward the binding location on the machine they push the wire through a suitable conduit I20 attached at one end to the standard 60, extending through a channel in the arbor BI and terminating at the shearing block I2I which is secured in the longitudinal channel in the arbor 6!, said arbor being attached to the standard 66 and extending therefrom. The shearing block I 2I has a tapered opening 52?. through which the binding wire 9| extends to pass through the spaced, apertured supporting blocks Iii-land I25 secured in the arbor channel and forming the binding location on the machine. A red I26 rotatably supported in shearing blockI2I has a shearing knife I2? secured thereto so that said shearing knife I2 I cooperates with the block I25 to sever the binding wireat the end of the block I2I adjacent the supporting block I24 thereby providing a predetermined length of severed binding wire 9! which, as shown in Fig. 18, is supported at the binding location on the machine by the blocks I24 and I25. This rod I26 extends longitudinally of the arbor iii to an aperture in the supporting standard 69 where a lever I38 is secured to said rod I26. This lever I30 has its free end connected to a link I 3| shown in Figs. 2 and 4, said link extending through anopening in the platform 24 into the compartment 23 where it is operatively connected to the mecha-' nism for actuating 'the shearing knife which mechanism will later be described detailedly. A spring I32 is provided on the knife-actuatin rod I25, said spring yieldably maintaining the rotatable shearing knife I2! in operative engagement With the shearing block I2 I.

CARRIER AND DRIVES FOR BINDING NEEDLES Figs. 4 and 7 illustrate the needle supporting and actuating mechanism and will be referred to for this description. As shown in these figures, the platform 24 has two spaced standards I 40 and It! provided with rigid slide bar extensions I42 and I43 vertical relative to the platform 24. The standards it!) and I4! are arranged at one side of the arbor 6i and secured upon the platform 24 so that the binding stage on the machine is directly central of said standards. Slide bars I42 and I43 slidably carry a housing IMI which contains the needle driving mechanism as shown in Fig. 7. Intermediate the portions M412 and I441) of housing I44 which slidably embrace the respective slide bars IE2 and M3, there is provided a central lug M5 to which one end of a lever or link it is hingedly connected. The other end of this link extends through an opening in the platform 24, and is connected to themechanism which not only supports the housing I 34 upon slide bars or rods :2 and IE3 but also is operative to move the housing Ids upwardly or downwardly through its reciprocating cycles. This needle reciprocating mechanism will be described detailedly hereinafter. Fig. '7 shows the link M6 provided with adjusting mechanism Ml whereby the region of travel of the housing I46, while reciprocated, may be adjusted.

Between the two portions 9 44a and I441) of the housing I44. slidably engaging the slide bars I42 and I43 there is provided a tubular portion I48 in which bearings for the drive shaft I49 are provided in any suitable manner. The one end of this drive shaft I49, as shown in Fig. 9, extends through an opening in the platform 24 into the compartment 23 and is operatively connected with mechanism which not only permits longitudinal reciprocation of the rod I49 as the housin I48 is reciprocated along the slide bars I42 and I43, but also is operative to rotate said drive rod I49 back and forth for revolving the needles as will be described. The opposite end of the drive shaft I49 has a pinion I50 attached thereto which meshes with an idler gear II supported on stub shaft I52, journaled in the housing I 44. The idler gear I5I meshes with another pinion I53 secured to shaft I54 which is journaled in the central tubular portion I55 of the housing I44. Shaft I49 may therefore be termed the needle driving shaft" while shaft I54 may be termed the needle supporting shaft for, at the end of shaft I54, extending outside the housing portion I55, a fixture I56 is provided by means of which two crochet type needles I51 are secured to shaft I54. This fixture I56 provided on shaft I54 secures the shank ends of needles I51 to shaft I 54 so they extend longitudinally therefrom parallel to each other and equally spaced, on each side of the axis of shaft I54, as shown in Fig. 4. The free end of these needles extending downwardly from the housing I44 toward the binding location on the machine are of the crochet needle type having hooked ends I58, said hooked ends being oppositely disposed, that is, when in normal position, as shown in Fig. 7, the open hook end of one needle faces toward the housing actuating link I46, while the other needle has its open hooked end facin in the directly opposite direction. Fig. '7 shows that these needles I51 are aligned with the binding wire supporting block I25 and. as viewed in Fig. 18, both needles are substantially parallel and spaced so that when lowered they will enter between the supporting blocks I 24 and I25 carried in the channeled portion of the arbor 6|. From this it may be seen that as the housing I44 is reciprocated on its guide bars I42 and I43, the needles I51 and particularly their hook ends I58 are moved toward and away from the supporting blocks I24 and I25 between which the binding wire is supported. Also when the drive shaft I49 is rotated in one direction or the other, the connected gears I50, I5I and I53 will rotate the shaft I54 in one direction or the other respectively thereby revolving the needles I58 about the axis of the shaft I54 in the direction in which said shaft is rotated. Normally, that is, when the machine is in its inactive position ready to start a cycle, needles I51 are above the supported binding wire 9| and in alignment therewith, one open end of the needle facing one side of the wire while the open end of the other needle faces the opposite side of the supported binding wire. If lowered completely, without being revolved, the needles would strike the severed piece of binding wire in blocks I24 and I25. (See Fig, 19.)

From the aforegoing description it will be evident that certain parts of the machine are initially operated manually and do not depend upon the power actuated portions of the machine to perform their functions. This operation, independent of the power driven portions of the machine, consists of the placin of the two coil supporting, collapsible forms upon the arbor and the manual actuation of the clamping mechanism by crank 16 securely to clamp saidforms together 12 while slidable on the arbor, said clamping mechanism, when actuated to hold the coil-supporting forms together, also rendering a safety switch effective to maintain the electric circuit to the power actuating motor as long as the forms are securely clamped together.

After the forms are clamped together upon the arbor the machine is started and its functions for tying the twelve separate coils on the two forms in proper succession is initiated.

FUNCTIONS OF THE MACHINE TO TIE A SINGLE WINDING Nine functions or steps of operation are necessary to tie a single coil, these nine steps being successively repeated twelve times in order to tie all of the twelve separate windings on the two forms held in the machine.

Step 1.--The wire feeding rolls MI and I02 are rendered operative to convey wire from the sup ply spool over pulley through the straightening devices and the conveying conduit to the cutoff or shearin block I2I and through the aligned aperture in the spaced supporting blocks I 24 and I25. The actuation of these feed rolls MI and I02 in this cycle of operation is such that a predetermined length of wire 9I extends beyond the final supporting block I25, as shown in Fig. 18. The shearing knife I21 then is rendered operative to sever the predetermined length of wire 9| as supported by blocks I24 and I25. It will be understood that the blocks I24 and I25, being supported in a grooved portion of arbor I20, position said severed length of binding wire 9| transversely of the coil being held in the binding position and substantially through the center of its loop opening, as shown in the diagram, Fig. 20.

Step 2.(See Figs. 21 and 22.) After the wire is in position the needle-carrying housing I44 is reciprocated downwardly along its supporting slide bars or rods I42 or I43 thereby causing the needles to descend toward the coil to be bound, which has originally been properly positioned relatively to the needles by the placement of the winding supporting forms on the arbor and between the two clamping jaws 66 and 61. The position of the needles as shown in Fig. 22 is such that they respectively pass equidistantly alongside the convolutions at the top-side of the coil held in the binding location. This initial descent of the needles downwardly is continued until the needle hooked ends are beneath the coil convolution therebetween and yet above the severed length of the binding wire held between blocks I24 and I25. Then Step 3 is initiated.

Step 3.(See Figs. 23 and 24.) The needle driving shaft I49 is rendered effective to act through gears I50, I5I and I53 to rotate the needle-supporting shaft I54 in one direction (here referred to as backward) whereby the needles I51 are revolved backward 30 which disalign them with the severed piece of binding wire supported by blocks I24 and I25 but still maintaining said needles out of contact with the coil convolutions therebetween.

Step 4.(See Figs. 25 and 26.) function (3) the needle housing reciprocating mechanism i again rendered active to move the housing I44 downwardly on its supporting rods I42 and I43 in order to bring the hooked ends of the needles below the binding wire 9I in blocks I24 and I25.

Step 5.(See Figs. 27 and 28.) Now the needle revolving mechanism is again rendered active to revolve the needles in the opposite or forward di- Followin the

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