US2813345A

US2813345A - Automatic winding mechanism

Info

Publication number: US2813345A
Application number: US368338A
Authority: US
Inventors: Ray W Scott
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-07-16
Filing date: 1953-07-16
Publication date: 1957-11-19
Anticipated expiration: 1974-11-19

Description

Nov. 19, 1957 R. w. scoTT AUTOMATIC WINDING MECHANISM 3 Sheets-Sheet 1 Filed July 16, 1953 INVENTORQ my RAY 567071 Nov. 19, 1957 R. w. SCOTT AUTOMATIC WINDING MECHANISM 3 Sheets-Sheet 2 Filed July 16; 1953 INVENTOR. /-?AY 66077 Nov. 19, 1957 w sco -r 2,813,345

AUTOMATIC wmpmc MECHANISM Filed ul 16, 1953 s Sheets-Sheet s IN VEN TOR.

RAVI/V 66077 United States Patent AUTOMATIC WINDING MECHANISM Ray,.W. Scott, Lbs Angeles, Calif.

Applicationsluly 16,1953, Serial No. 368,838

10 Claims. (ClL33--132).

This invention relatesto anautomatic .winding mechanism. a

It is an object of this invention to provide an improved winding mechanism incorporating a control for automatically stopping the winder aftera predetermined length of material has been wound.

It is another object of this invention to provide a device of this character utilizing a motor operated slipping transmission in which a preset control simultaneously deenergizes the motor and halts rotation of the winding roller after passage of a predetermined length of material.

It is another object of this invention. to provide an improved automaticlmeasuring; device that can easily be resets.

It' is another objectof this invention to provide an improved traverse mechanism for guiding the material upon aspool; or "the like, and that can: beeasily adjusted to center-the traverseand also vary the length" of the. traverse sweep;

It is another object of this invention to provide a novel windiiig shaftthat can accommodate either a spool or a flat element 'or 'card, such as of cardboard or the like, upon" which the material is tobewound. For this purpose; the shaft is of bifurcated-form, a cardboard being capable of being carried betweenthe bifurcationgand the aperture of a spoolbeing capabl'e ofapassingboth bifurcatibns;

This invention possesses manyzother advantages; and has other objectswhic'h maybe made more clearly apparent from: aconsideration: of one: embodiment of the invention. For this purpose; thereis sh own a form inthe drawings accompanying and forming part of the present specification. This form will now: be described in detail, illilstratingthe general principles of the invention; but it is tobe understood thatthis detailed description is not' to -be taken ina limiting-sense, since the scope of this invention is best defined by the appended claims.

Referring to the drawings? Figure l is an elevation of a device incorporating'th'e present invention, some ofithe parts" being broken away and others being: shown in' fragmentary section; V

Fig.52 is an enlarged fr agmentarysectional view, taken along the plane indi'catedby Iine Z Z ofFig. 1;"

Fig. 3 is a top plan view: of the apparatus shown in Fig. 2;

Figs: 4; and: r 5 are fragmentaryelevations," taken in a dir'ection conresponding' to lirie 4 4='of Fig.- 1 and respectively showing different positions of th'e mechanism; 1 Fig; 6 is a diagrammatic view'showing the structure fon'simult'aneously operating a circuit cont-roller and a brake for the windingshaft;

'Fig; 7 is an elevation of the-traverse mechanism? Fig; 8 -is arr-enlarged sectional View; talien'along the plane'indi'cated by Iine S -S 'of'Fig. 7;

Figs- 9" is a view='showing analternate mode of using the Windiii'gshaft'and- Fig-.ulO- is a-sectionahvi'ew, taken-along aplane indicated by line 10-10 of Fig. 2.

As shown in Fig. 1,. a=spool 10;: upon;whichematerial 11, suchxtas beltllacing; isitobeawoundgiis caririedzib'y a winding shafit 12.. that projectsrfronr a housing. "13;

The winding. shaft 12 is operatedfbym=1ransmission mechanism .enclosed withinrthe casingtllh A' rriotor114 has a shaft .15 for driving anfriction:wheel 9*of-the:trans mission mechanism;- toggle switchflfit supported on the casing 13, controls theenergizationnofi the motor 14.

That portion. ofthe'twin'dirigshaft lz' upon which the spool 10* is supported comprises-bifurcations 1 6i and- 17. The bifurcations 16 and 17Kboth projct-lthiough thie spool 10. r i

A collar 18, carried 'for' rotation by theshaftlhhasa recess 20 'receivi-ng theusual flanged-over inner cylinder 19 of the spool "10: The spool 10 is-c-oupled to' the' winding shaft 12 by friction createdby i opposite flex'ure otth'e bifurcations 16 '.and 1 7"'to-engage the inner-cylinder 19 of the spool 10: This is accomplished 'bydr'iving a wedge or other suitabledevice-2I between the*bifurcations. Conveniently; thelegs of 'a spring-clamp comprise thewedget An inclined shaft 22 projecting from thehousing 'lli supportsa material supply sp'ool'23 A measuring device- 24 operates a circuil? controll'n25 interposed in the energizat-i'on *cincuit for the motor I for deenergizing the motor upon "a passage'of "predetermined length of: 1 material 11 on the winding spool 10.

An angularly movable' sh'aft' 26*"( Fi'gsL-2}' 3,4, 5 and-6), appropriately supported-by a bracket 27' secu'redto the base 28 of thedevice, is connected by a mechanisrnynow tobe described,to'a'striker rod 29 engageable witha flex-i ible" arm of the circuit -controller 25. The-shaft 26 is freely rotatable irr bearirig= bl'acketsflfl {Fig} 3). The shaft 26-and rod 29 comprisea -trip mechanismddr operr ingcircuitcontroller 25. Air=overcenter springlihkage mechanism is providedfor causing movement of the striker 29hpon-a predetermined angular movement of the shaft 26. i

As shown most clearly in Figsw 4" and -5yjthe upper end of the striker" 29 4s pivotall y secured to-one arm 31 of an angled lev-e'r-oriinkfill The oth'er arm"33of"the angled lever 32 is pivoted to a -crank 34 carried by the shaft 261' For this purposepa pin-34d is provided. The arms 31 and 33 dfiiie aconcavity'between-therna' A"he1i cal tension-spring =35, secured't'o the bracltet 27, engages the arm 31 of theangled lever 32*to urgethe angled lever 32downwardlyi In the angular positionof the shaftio 'shbwn in-Fig: 5, the spring 35"exertsafo'rce tending to move the-crank 34' in a counterclockwisedirection abbutthe'shaftzfi" The concavity between the arms 31 t and 33*perrnits the'link' to occupy a position in which the spring exertsa"torque inthis directiona Fiirtlierrnore,-- movement in suchcounterclockwise" position is limited'bywngagement of the shaft 26= with the apex-"of the angled lever-'32:

Upon slight angular movement "of the shaft 26in a clockwise dir'eetiontfnom the*position' shown in Figr 5 the: force exerted by tlie spring-35 shifts "from one"side ofthe aXis' ofrotationof thesh'aft' 26 io the'other; Ac cordingly, the linkage for the striker mech-ani'smis tr'ipped upon a slight angular-movementof theshaft'ztiggand 'the striker'sudde'nly moves to open the circuitcontrollrQ'Si The position of the crank 34='and "the=lever 32' after such tripping movement is-shown'in Figsr 4'and- 6'."

When the shaft 26 istripped, a"wraparound brale band 36 is also operatedi Thebandfifii'is canied Iina groove of'the collar 18," inwhichit mayslip'. A"cra'nk 37 '(Fig; 6), carriedatthe endofihe trip shaft'26,rnoves aconnecting link 38*upwardl'y when the sha'ff26istrippedl The link ssr tates adoglver 39i1pwa'rdly to interp se the do leveroaifithe pathofrotatioifofaprojection 3 40 formed integrally on the band 36. The dog lever 39 is pivoted on a bracket 41 mounted on the housing 13. The dog lever 39 prevents rotation of the brake band 36, and the band 36 wraps around the collar 18 and quickly halts rotation of the winding shaft 12.

When the brake hand 36 is operated, the inertia of the motor causes slippage between the motor shaft 15 and the friction wheel 9 of the transmission mechanism.

The winding shaft 12 is thus stopped simultaneously with the opening :of the motor circuit, and precise measuring can be achieved by eliminating the inconstant effects of motor inertia and transmission friction.

The measuring device 24 includes a rotatable disc 42 (Figs. 1, 2 and 3). The disc 42, as shown most clearly in Figs. 2 and 3, mounts an arcuately disposed leaf spring 43, the free end of which is spaced from the rear surface of the disc 42 and forms a projection engageable with an arm 44 of the shaft 26 upon suflicient angular movement of disc 42. The end edge of spring 43 then engages the arm 44 to move the shaft 26 and trip the crank 34 and lever 32 when the disc 42 moves clockwise to a definiteangular position.

The leaf spring 43-is adjustably secured to the disc 42 by a bolt and elongate slot (Fig. 10) so that the angular position of the spring 43 on the disc 42 may be accurately adjusted.

The disc 42 is frictionally mounted on a shaft 45 that is supported for rotation on the bracket 27 (Fig. 2). The shaft 45 and the disc 42 frictionally coupled thereto are driven by a transmission that is operated directly in accordance with the amount of material 11 being wound. After first positioning the disc 42 counterclockwise from shaft tripping position and resetting the shaft 26 and the trip device to the position of Fig. to close the circuit controller 25, the winding mechanism is started by throwing the main switch 16. The mechanism then automatically stops after passage of material in an amount directly proportional to the initial setting of the frictionally mounted disc 42. calibrations 51 on the face of the disc 42 cooperate with an indicator 52 secured to the bracket 27, and permit the operator accurately to set the mechanism. The tripping may be made to correspond precisely to a zero indication by adjustment of the angular position of the leaf spring 43 on the disc 42.

The leaf spring 43 makes it possible to reset the mechanism in any desired sequence. If the shaft 26 and trip mechanism are first reset by a reset lever 90 (Fig. 1), the spring 43 may move in a resetting or counterclock Wise direction, as viewed in Fig. 1, without disturbing the shaft 26 from its reset position. In the event that the leaf spring 43 engages the arm 44 in such movement, the leaf spring 43 flexes toward the disc 42 until the end of the leaf spring 43 clears the arm 44. The engagement between the spring 43 and the arm 44 is ineffective to move the arm 44 since the shaft is then in the limiting position of Fig. 5.

.without overcoming the torque of the reduction gearing.

For this purpose, apertured friction members 53 are disposed on opposite sides of the disc 42. The shaft 45 passes through an aperture in the disc 42 and through the friction members 53. The frictionmembers 53 are accommodated between washers 55. A cap nut 54, threadedly accommodated on the shaft45, engages the outer washer to urge the assembly against a spacer sleeve 56 and lightly compress resilientmernbers 53 frictionally to hold the 4 measuring disc 42 in place. A set screw 57 locks the cap nut 54 in an adjusted position.

In the position shown in Fig. 2, the mechanism is being operated, and the shaft 26 is in an angular position corresponding to Fig. 5.

Upon rotation of the control disc 42 in a clockwise direction, as viewed in Fig. 1, the projection 43 engages the arm 44 to angularly move the shaft 26 and trip the mechanism.

A transverse mechanism is provided for appropriately guiding the material onto the spool 10. The traverse mechanism is shown most clearly in Figs. 7 and 8.

A traversing arm 58 comprises two parts 75 and 76 adjustably secured together to determine, within limits, an effective combined length of the arm 58. The lower part 76 is rod-like and circular in section, and its upper end is threadedly received in an aperture of a transverse flange 77 of the upper arm. A set screw 78 secures the parts '75 and 76 in an adjusted position.

The arm 58 is mounted for angular movement about an axis 78 spaced from and extending in a direction normal to the axis of the winding roller in order that a movable portion of the arm 58 sweeps substantially axially of the spool. A bracket 59 carried by the base 28 provides a bearing for a bent end of the lower part 76 of the traversing arm 58.

The upper part 75 of the traversing arm 58 terminates in upwardly extending bifurcations 60. The material 11 between the winding spool 10 and the measuring pulley 48 is guided by the bifurcations 60. Adjustment of the length of the traversing arm 58 properly locates the bifurcations with respect to the winding spool 10.

For reciprocating the traversing arm 58 about the axis 78, a linkage system is provided. A reciprocating lever arm 61 is of two-part construction, the parts 79 and 80 being adjustably secured together to vary the effective length of the reciprocating lever 61. For this purpose, the lower part 80 is of circular cross section slidably accommodated in an aperture of a transverse flange 81 of the upper part 79. A set screw 82 secures the parts 79, 80 in an adjusted position.

The two-part reciprocating lever arm 61 is pivotally mounted at its upper end on a bracket 62. The movable end of the reciprocating lever arm 61 has a swivel socket member 63 threadedly receiving one end of a connecting link 64. The other end of the connecting link 64 is pivotally connected to the traversing arm 58. For this purpose, a nut 66, threadedly accommodated on the threaded portion of rod 76, has a reduced cylindrical extension 83 mounting a relatively rotatable ring 84. A snap ring 99 enters a groove in this extension, and prevents relative longitudinal movement between the adjusting nut 66 and the ring 84. The end of the connecting link 64 passes with substantial clearance through aperture 85 of the ring 84. The connecting link 64 carries an abutment collar 65 abutting the ring.

A tension spring 67, secured at one end to the casing 13, engages a bracket 68 carried by the traversing arm 58 to urge the entire linkage mechanism toward the right,- as viewed in Fig. 7, and in such direction as to maintain the collar 65 and ring 84 in engagement.

The reciprocating lever arm 61 is operated by a crown cam 69 that is uniformly rotated by the transmission. The crown cam 69 engages a cam follower roller 86 carried by the upper part 79 of the reciprocating lever arm 61. The cam follower roller 86 is maintained in engagement with the crown cam 69 by the tension spring 67.

Upon rotation of the cam 69, the arm 61 and connecting link 64 reciprocate to move the traverse arm 58 between definite angular positions indicated by dot-and-dash lines in Fig. 7. These angular positions of the traversing arm 58 are determined by the pitch of the crown cam 69 and the geometric relationships of the linkage system.

The sweep: or amountof angular movement of the traversing arm 58 depends upon the location along the length of the traversing, arm 58 atwhich connection is effected with the connecting link 64. Adjustment of the length ofthe sweep of the traversing arm 58' is effected within substantial limits by moving the adjusting nut '66 longitudinally oftherod 76. Such adjustment shifts the position of the ring 84' along the length of the traversing arm58, downward movement of the nut 66 increasing the sweepfor a given stroke of the connecting link 64. The nut 66 'can be rotated despite 'the continuous connection between the traversingarm58 and the link 64 by virtue ofthe fact that the collar 84 effecting; the connection need notrotate with the nut 66, but it is nevertheless moved longitudinally therewith;

Adjustment of the sweep of thetraversing arm can also be accomplished by changing the stroke of the connecting link 64. This is accomplished by adjusting the length of the two-part reciprocable lever 61; Increasing the length of the reciprocable lever 6l increases the stroke of the connecting link 64 to increase the sweepof the traversing arm 58;

A substantial range of angular movement of theatraversing arm canbe accomplished by adjustment both of the nut 66 and the two-part reciprocating lever61.

In order to center the sweep: of the traverse arm 58 with respectto the spool 10, the operating length of the connecting link 64 is varied. Thus; for instance, if the collar 65 carried by the connecting link 64 is moved to the: right; the central position of the traversing arm is moved toward the right along the length of the spool 10. The threaded connection between the connecting link 64 and the reciprocating lever arm 61 permits such adjustment. Such adjustment is accomplished by manipulating a knurled knob 71 formed at the left-hand end of the connecting link 61, as viewed in Fig. 7.

As shown most clearly in Fig. 9, the shaft 12, the bifurcations 16 and 17, and the collar 18 may receive a card 100 in place of a spool 10. The card 100 is inserted between the bifurcations 16 and 17 and into a diametrically extending slot 101 of the collar 18. The clamp 21 moves the bifurcations 16 and 17 together to engage the card 100 and properly maintain the latter in position on the shaft 12.

The inventor claims;

1. In a winding mechanism: a rotary structure provided with an element upon which the material is wound; an electric motor; a transmission mechanism between the motor and the structure including a friction drive capable of slipping when the rotary structure is restrained; a brake for restraining the rotary structure; a circuit controller for the motor; means responsive to the winding of a definite measure of the material on the element for operating the circuit controller to deenergize the motor; and means operating substantially simultaneously with the operation of the circuit controller for applying the brake for causing slippage of the transmission mechanism.

2. In a winding mechanism: a rotary structure for winding material; a motor; a frictional coupling between the motor and the rotary structure and capable of slipping when the rotary structure is restrained; a brake for the rotary structure; a movable measuring element; means effecting a transmission between said material and said element for moving said measuring element; a circuit controller for the motor; a mechanism for operating said brake; and means for simultaneously operating said mechanism and said circuit controller upon a predetermined movement of said measuring element.

3. In rotary apparatus: a rotary structure; a motor; a friction coupling between the motor and the rotary structure; a wrap-around brake band loosely mounted upon said rotary structure and rotated thereby; a projection carried by the brake band at one end thereof and describing a circular path of movement; a member movable into and out of the path of movement of said projection; a

trip 'mech'anismfor moving'said movable member; and an actuator member movable'in response to the existence of a condition for tripping the trip mechanism.

4. In rotary apparatus: a rotary structure; a motor; a friction coupling between the motor and the rotary strucure; a wrap-around brake band loosely mountedupon saidrotary structure and rotated thereby; a projection carried by the brake band at one end thereof and describing a circular path of movement; a member movable into and out of the path of movement of said projection; a circuit controller for the, motor; a trip mechanism for moving said movable member and for ope-rating said ohcuit controller; and an actuator member movable in response to' the existenceof a condition for tripping the trip mechanism:

5. In a measuring device: a rotatable shaft; a plate; means frictionally, coupling said plate to said shaft forrotation therewith; said plate having indicating markings thereon; means for rotating said shaft, including a pulley; meansfor guiding flexible material about said pulley; a trip mechanism for operating a control device, and includingan angularly movable arm; and a leaf spring secured to the plate and having a free end extending away from the plate when said spring is unflexed; said arm being in the path of movement of said free end of said spring and moved thereby when said .plate and spring move to a definite. angular position.

61 In a measuring device: a rotatable shaft; a plate; means frictionally coupling said plate to said shaft for rotation therewith; said plate having indicating markings thereon; means for rotating said shaft, including a pulley; means for guiding flexible material about said pulley; a trip mechanism for operating a control device, and including an angularly movable arm; a leaf spring; and means adjustably securing said leaf spring to said plate for limited angular movement thereon, said leaf spring having a free end extending away from the plate when said spring is unflexed; said arm being in the path of movement of said free end of said spring and moved thereby when said plate and spring move to a definite angular position.

7. In a winding mechanism: a rotary structure for winding material; a measuring element movable in accordance with the amount of material being wound; a controller for the rotary structure; a trip mechanism for operating the controller, comprising: an angularly positionable shaft, a crank carried by the shaft; a link having arms extending on one side of the link to define a concavity between the arms, means pivotally connecting one arm. to the crank, a tension spring connected to the other arm and urging the link in one direction away from said shaft, an operating arm carried by said shaft; a connection between said link and said controller; and means carried by said measuring element for moving said operating arm when said measuring element is in one position.

8. In a winding mechanism: a rotary structure for winding material; a motor for rotating said structure; a friction coupling between said motor and said rotary structure; a wrap-around brake band loosely carried by said rotary structure for rotation therewith, said band having a projection at one end thereof; a circuit for the motor, including a circuit controller; a measuring device movable in accordance with the length of material wound upon said structure; an angularly positionable shaft; a crank carried by the shaft; a link having arms defining a concavity between them; means pivotally connecting one arm to the crank; a tension spring connected to the other arm and urging said link in one direction away from said shaft; said link engaging said shaft and defining a limiting angular position of said shaft in which said spring biases said shaft in said limiting position; an operatng arm carried by the shaft for moving said shaft away from said limiting position and toward a position in which said spring urges said shaft away from said limiting position; means carried by the measuring device for moving the arm when said device reaches a definite position; a dogging projection .engageable with the projection for causing the band to ing material; a measuring element movable in accordance with the amount of material being wound; a controller for the rotary structure; a trip mechanism for operating the controller, comprising: an angularly positionable shaft; means determining one limited angular position of the shaft; a spring connected ec-centrically to the shaft to provide alternate stable positions of the shaft and an intermediate unstable central position, one stable position corresponding to said limited position; an operating arm carried by the shaft; means operated upon movement of the shaft away from said limited position and beyond said central position for operating said controller; and a 10st motion connection between said measuring element and said operating arm for moving the shaft away from said one limited position upon a predetermined movement of said element.

10. In a winding mechanism: a rotary structure'for winding material; a motor for rotating said structure; a friction coupling between said motor and said rotary structure; a wrap-around brake band loosely carried by said rotary structure for rotation therewith, said band having a projection at one end thereof; a circuit for the motor, including a circuit controller; a measuring device movable in accordance with the length of material wound upon said structure; an angularly positionable shaft; means determining one limited angular position of the shaft; a spring connected eccentrically to the shaft to provide alternate stable positions thereof and an intermediate unstable central position, one stable position corresponding to said one limited position; an operating arm carried by the shaft; means operated upon movement of the shaft away from said limited position and beyond said central position for operating said controller; a dogging projection cooperable with said band projection; means operated upon movement of said shaft away from said limited position formoving said dogging projection into dogging position; and a lost motion connection between said measuring device and said operating arm for moving said shaft away from said one limited position upon a predetermined movement of said device.

References Cited in the file of this patent UNITED STATES PATENTS 353,107 Winter Nov. 23, 1886 1,713,277 Goldberg et a1 May 14, 1929 1,731,403 Weaver Oct. 15, 1929 1,753,950 Sleeper et al. Apr. 8, 1930 1,894,307 Ek Jan. 17, 1933 1,934,541 Hildebrandt et a1 Nov. 7, 1933 1,961,376 McIlvried June 5, 1934 2,171,667 Mickelson et a1 Sept. 5, 1939 2,190,597 Dritz Feb. 13, 1940 2,336,574 Selvig Dec. 14, 1943