US2416785A - Bobbin arbor - Google Patents

Description

March 4, 1947. w w c I 2,416,785

aoaam ARB oR Filed June 13, 1945 2 Sheets-Sheet 2 I I INVENTOR I MY/mm [has flaw/Yer Mic/5, I I. BY v @wjtsm hm M ATTORNEYS Patented Marni,

UNITED STATES P rsNrorncs '1 William Elias Detwiler Welch, Rome, Ga., w I signer, by mesne assignments, to Celanese Corporation of America, a corporationof Delaware Application June 13, 1915', Serial No. 599,266-

This invention relates to arbors for the support and rotation of cylindrical bobbins, and has. for its object the provision of an improved arbor particularly adapted to permit ready reception and and without the'jattendant difllculties hereinbefore recited. Generally speaking, the arbor of the invention has floating or pivoted arms which are expanded or contracted by means of an operating disc turned clockwise or counterclockwise. 68 of the member. An arm 6 Claims. (c1. zip-42) 'l'huathe arbor comprises a generally cylindrical body member, conveniently made of wood, and

having a plurality of circumferentially spaced longitudinal peripheral grooves. A radially ex-' removal of a bobbin and at the same time 5 tending arm is positioned in each groove and is adapted to firmly hold the bobbin in operative pivotally secured at one e'ndto the body member, position. the other or free end of each arm being capable The." rbor of the invention may be used for of radial movement about its pivot. Associated the and rotation of a cylindrical bobbin with such free ends of the arms is means for in, various thread-winding, unwinding, twisting w simultaneously impartingalimited predetermined and similar operations, but is especally adapted radial movement to the arms, whereby the arms for unwinding rayon thread from packages on may be protracted and retracted to increase or bobbins as described in the United States patent decrease, respectively, the effective peripheral of Cooper No. 2,331,454. In accordance with the diameter of the arbor. Preferably, this means heretofore customary practice, the thread pack- 5 comprises a disc mounted to turn about the longiage is wound on a cylindrical metal bobbin, usutudinal axis of the body member and having a ally perforated, and the bobbin is carried on a plurality of eccentric slots, circumferentially rotatabl mounted arbor. This arbor has heretospaced lik the arms, into which extend pins forezbeen made of wood with a blank metaldisc' I protruding from the free ends of the arms. Turnon'br'feend and fitted at both ends with bearing ing of the disc simultaneously imparts a similar or gudgeon pins. Three equally spaced longitulimited radial movement to each of the pivoted dinal arms radiate from the body of the arbor, arms, whereby the arms are retracted and prov and strips of felt are secured in grooves in the tracted to decrease and increase the effective longitudinal edges of these arms. When new, peripheral diameter of the arbor for respectively this arbor is forced into the bobbin and has 9. (1) insertion into and removal from and (2) oprelatively-snug grip to prevent slippage. Howeratively holding a bobbin. These and other ever, as the felt strips wear, slippage increases novel features of the invention'will be best underand the strips must be frequenthr replaced. stood from the following description taken in Moreover, due to fouling of the felt strips or the v conjunction with the accompanying drawings, in use of undersized bobbins, the arbor frequently lwhich sticks in th bobbin, and is removed by striking Fig. l is a longitudinal cross section of the one end of the arbor. A lead washer is usually arbor of the invention, with a spin bobbin theremounted onthis striking end of the arbor for on,

balance only, and in many instances this washer Figs. 2 and 3 are transverse sections on'the line is knocked off by the strikingor hammering of 2-2 of Fig. 1, with the longitudinal arms in their the arbor to remove it from the bobbin. While protracted and retracted positions, respectively. special bumpers are provided for striking the Fig. 4. is an end yiew of the operating end of arbors, operators often strike the arbor against the arbor and bobbin shown in Fig. 1, if a; any protruding machinery part to remove it from Fig. 5 is a. transverse section on the line 5-! the bobbin, and this frequently causes damage 40 of Fig. 1. to the machinery part. With hi type f r or. Fig. 6 is a detail view of the end washer for no adjustment of its effective peripheral diameter the body member of the arbor, and is possible except by varyihg the width of the Fig. 7 is an elevation of a thread unwinding felt strip, and this is neither satisfactory norapparatus with which the arbor may be advanpractical. Consequently, the use of these arbors tageously used. d entails a constant and high maintenance cost in 1 The'arbor of the invention has a base end and. addition to frequent periodic replacements. an operating end, being the left and right hand The arbor of the invention is characterized by ends, respectively, as viewed in Fig. 1. its ready and convenient insertion into and re- The body member I 0 of the arbor is generally moval from a bobbin without damage to the arbor cylindrical and is conveniently made .of wood,

although it may be made of any other suitable material. -Circumferentialiy spaced about its periphery, the body member has three grooves H extending throughout the longitudinal length I2 is positioned in each The arms |2 are preferably their outer edges have longitudinal slots intoa roove, and each arm is pivoted at the base end if the body member. Conveniently, the base end jof the body member may have an enlarged hub for spider I 3 for facilitating the insertion of a pivot pin -|4 through the end of each arm |2 The arms are loosely fitted in their; respective igrooves, so that their free ends are capable of a certain amount of radial movement about the ipivot pins l4. 7 A generally circular disc is operatively mounted at the operating end of the body memher It, adjacent the free ends of the armsv l2.

is turnedto position the ends of the slots 2|,and the arms i2 are retracted and the arbor has its minimum effective peripheral diameter. .The arbor is then inserted in a bobbin 28, such for example as the common perforated metal spin bobbin. The disc l5 isthen' manually turned until the pins 22 occupy the rearward ends of the slots 2|. of thisturning movement protracts. the arms 12 The first half until the arbor has its maximum effective peripheral diameter, and the second half of the The disc l5 may conveniently be mounted to turn I freely on a hearing or gudgeon pin it positioned in the longitudinal axis of the body member Ill and appropriately secured thereto, as for. exam-,

"ple by being inserted a suitable distance in the icenter of the'operating-end of the member ID .}(Fig. l) As illustrated in the drawings, the pin :l6'has an enlarged hub i1 on which the disc I! is rotatably mounted and an outside restraining washer. l8, which also serves as a bearing washer for the bearing end of the pin IS: A washer l8 is secured by screws or the like to the end of the member l0, and the disc I! is positioned between the washers l8 and I9 and turns freel on the hub |1.-

turning movement locks the arms in their pro-Q tracted positions. The resilientstrips 24 press against the interior of the bobbin and securely 18 hold it on the arbor. Where the bobbin carries a a package of thread 29 to be unwound, the'arborof the invention, with the bobbin and thread package-secured thereon, may be mounted with surface or the package with a uniformly driven its gudgeon pins l6 and 21 in'the slots of the upright supports 3|, and the thread unwound at a uniform speed by engagement of theperipheral.

endless belt 32, as particularly described in the aforementioned Patent No. 2,331,454. The base" i The disc I5 may advantageously be made of hard flber,-and ha three eccentric slots 2|, circumferentially spaced to conform with the cir- 'cumferentially spaced arms l2. Itwill be understood that the arbor may be, provided with more than three arms, equally spaced about the periphery of the body member l0, and the disc |5 will have a corresponding number of similarly disc 25 and the bearing washer l8 protect the bobbin 28'from damage'on-its ends by scraping i on the sides of the supports 3L Heretofore there has been no such protection for-the. ends of the bobbin, and theyhave consequently" suffered considerable damage. The arbor of th invention is a unitary struc- "ture, light'inweighhwith no parts likely as be I fouled by stray thread. It is easily handled, and can be inserted in and removed from a spin bob-- spaced eccentric slots'2l. The free ends of the 1 arms l2 are provided with protruding pins 22 which extend into the corresponding slots 2| of the'di'sc'lfi. The disc l5 has cut-outsor indentations23 and a serrated peripheral edge to permm it to be readily grasped and turned by the hand of the operator.

made of wood and which are tightly fitted resilient strips or cushions 24, such for example as strips of'synthetic rubber, having ample traction and resiliency. The base end of the member illis covered by a disc 25, preferably of hard fiber, fastened to the 'member I 0 by screws 26 or the like. The disc 25 servesas a hand hold as well as stop for the 4 bobbin. A hearing or gudgeon pin'2l is inserted The eccentric slots 2| and coofieratingpins 22 may be considered as cams andJ am-followers; respectively. When the pins are' atthe rearward ends of the slots, as indicated in Fig. 4, the arms l2 are in their protracted positions, as indicated in Fig. 2. Turning the disc 15 counter-clockwise, as viewed in Fig. 4, moves the pin 22 to the forward ends of theslots 2| and radially withdraws bin in less time than is now possible with the heretofore customary types of arbors. The arbor adjusts itself to various diameters of spin bobbins 1 .and at the same time exerts a uniform inside tension on the bobbin, preventing slippage and fur ther placing a more uniform'tension on the thread being unwound, twisted or the like. No friction .a suitable distance in the center of the base 'end oi the member HI.

is exerted on any parts of the bobbin during the insertion and removal ofthe arbor, but when the disc is turned the bobbin is firmly secured to the.

mer type of \arbor. ,This permits the use of syns ability to use thin strips of syn- I invention.

the arms I 2 to their retracted positions, as indicated in Fig. '3. Most of the radial movement of the arms is effected as their pins move through the forward half of the slots, and the movement of the pins through the rearward half of the slots is in the nature of a locking action, as will be seen from an inspection of the configuration of the slots in Fig. 4. In

other words, the forward half of each slot 2| isentirely eccentric, while the rearward half of the slot is practically concentric, with respect to the longitudinal axis of the arbor.'

QIn the operation of the arbor, the disc I5 While: the invention has "been particularly described and illustrated iii-connection with a cylindrical metal bobbin, it is equally applicable to I other types of bobbins and'similar supports for yarn packages. of Celluloid (or For example, arolled up sheet similar resilient material) insorted in the central openingol' an otherwise unsupported annular cake of rayon (or the like) may be distended by inserting and locking the arbor of the invention within the Celluloid sheet.

The thus distended Celluloid sheet is in effect a ,bobbin operativelymountedon the arbor of the invention. v V

I claim: v 1. A bobbin arbor comprising a generally cylindrical body member having a plurality of cirpins 22 at the forward.

I or the like, rather than thick strips of felt, is a distinct advantage of thearbor of the thetlc rubber, which does not foul as does felt, and moreover,v is not deleteriously. afiected by oil ff gas feltis. '.thetic rubber,

cumferentially' spaced grooves extending throughout the length of the member, a radially extending arm positioned in each of said grooves and pivotally secured at one end to the body member, a pin extending from the other and free end-oi each arm, a disc operatively secured to the body member to turn about the longitudinal axis thereof and provided with slots cooperatingzwith said pins for. simultaneously imparting a limited radial movement to the free ends of said arms.

' 2 A bobbin arbor comprising a generally cylindrical. body member having a plurality oi circumferentially spaced longitudinally extending 'peripheral grooves, a radially extending arm positioned in 'e'ach or said grooves, one end of each of said arms being pivoted to the base end of saidmember and the other end of the arm hav me a pin protruding therefrom and being capable of radial movement about its pivot, and a disc operatively associated with the other end 01 said 1 one end of each oisaid arms being pivoted to i said hub and the other end being capable of,

having a plurality of slots circumferentially spaced like said arms and into which said pins extend, a portion of each of said slots being eccentric and the remaining portion substantially concentric with respect to the longitudinal axis of said member. r

, 5. YA bobbin arbor comprising a generally cylindrical body member having a hub atone end and a plurality of circumierentially spaced longitudinally extending peripheral grooves, a radially extending arm positioned in each or said grooves,

' radial movement about its pivot, a pin extending member and adapted to be turned about the longitudinal axis 'or the member, said disc having a plurality of eccentric slots circumierentially spaced like said arms and into which extend said pins protruding from .the adjacent ends-oi said arms whereby turning of the disc simultaneously protracts or retracts said arms.

3. A bobbin arbor comprising a generally cylindrical body member having a plurality of circumiere-ntially spaced" longitudinally extending 1 peripheral grooves, a radially extending arm p0- sitioned in each or said grooves, one end 01 each of said arms being pivoted to the base end of said member and the other end of the arm being capable or radial'movement about its pivot, a pin protruding from said other end or each arm, a

gudgeon pin centrally mounted in the.other end or said member, a disc rotatably mounted on said gudgeon pinvadiacent that end of the member,

and a washer secured to the gudgeon pin to restrain lateral movement of saidv disc, said disc having a plurality of eccentric slots circumferen tiaily spaced like said arms and into which said pins extend whereby turning of the disc simultaneously protracts or retracts said arms.

a disc operatively associated with the other end 55 1,964,585

or said member and adapted to beturned about from said other end of each'arm, a pair of spaced washers secured to the end of said body member opposite its hub, a disc positioned between said washers and operatively mounted to turn about the longitudinal axis 01 .the body member, said disc having a plurality or eccentric slots circum-e rerentially spaced as said arms and into which said pins extend whereby turning of the disc radial movesimultaneously imparts a similar ment to each of said arms.

6. A bobbin arbor comprising a generally cylin drical body member having a-plurality oi circum-c ierentially spaced longitudinally extending peripheral grooves, a radially extending arm positioned in each. of said grooves. one end of each or said arms being. pivoted to the base end or said member and the other end or thearm being capable of radial movement about its pivot, a pin protruding from said other end of each arm, a

"gudgeon pin centrally mounted in the other end 01 said member, a disc rotatably mounted'orrsaid gudgeon' pin adjacent that end oi the member, a washer secured to the gudgeon pin to restrain lateral movement of said disc, said disc having a plurality oi. eccentric slots circumierentially spaced like said arms and into which said pins extend whereby turning oi the disc simultaneously protracts or retracts said arms, a disc covering the base end oi said member for limiting lateral movement of a bobbin, and a gudgeon pin ttientrally'mounted in the base end oi said mem- -W1LLIAM ELIAS DETWILER WELCH.

anraasncsscrrnn The following references are of record in the me or this patent:

the longitudinal axis oi the member, said disc UNII'ED era-ms rams-s" Nama ma Number Larsen June 26, 1934 1,870,886 Fellcws-...-....... May 22. 1928 3

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