US2055952A - Bobbin - Google Patents

Description

sept. 29, 1936.

H. SUMMA BOBBIN v Filed March '1, 1932 5 Sheets-Sheet ffy.; g3

Sept. 29, 1936.

H. SUMMA BOBBIN Filed March '7, 1952 5 Sheets-Sheet 2 Sept. 29,1936. H, SUMMA I ,2,055,952

BOBBIN Filed March 7, 1932 5 Sheets-Sheet 3 Patented Sept. 29, 1936 sa.;

UNITED STATES PATENTfoFFlC-E- .-,OBIN Hans Summa, Schwarzenbach#on-the-Saale,

j Germany Application :Maren *1, 1932, serialfNo. 597,337

- In Germany March 12, 1931 l 2 claims.; (c1: 199-297) My invention relates to bobbins for shuttles, and more particularly to means for connecting the pim and the peg. x

It is an object of my invention to. provide a connection which reliably holds 'the 'pi'rn- Von the peg even if the shuttle is moved rapidly during its operation but does not require an'effort for setting it. x

It is another object of 'my invention to so design the connection that it will not causev deformation of the peg or the pirn.

It is still another object' of my invention to so design the connection that itV will-noty 'increase the over-all length of the peg and the pirn, and center the pirn on the peg. H -1' I D'.

It is still another object of` my` invention to 'so design they connection that the amount of material required for it is smalland the extra weight and the increase of inertia it brings about are negligible. l

It is still another object of my invention to so arrange the connection that it will notexert any mechanical or chemical,iunlrienceV on theY thread on the pirn so that breaking of thefthreads `for these causes is eliminated. i*

It is still another object of my invention to so design the connection that it may be tted to existing pegs and pirns, so that the same bobbins may be used for spinning and for weaving factories.

With these objects in mind, I provide a sleeve in the pirn and means for connecting the sleeve to the peg.

In a preferred embodiment of my invention, I provide a bayonet joint for connecting the pirn to the peg, the sleeve having a slot or a pair of slots and being arranged at the big end of the pirn While the pin, or pins, of the joint are arranged in a corresponding position on the peg.

In the accompanying drawings, several embodiments of my invention are illustrated by way of example.

In the drawings Figs. 1 to 4 illustrate a pirn having a plain sleeve with a bayonet slot,

Fig. 1 is an elevation of the peg,

Fig. 2 is an elevation of the pirn,

Fig. 3 is an axial section of the pirn, and

Fig. 4 shows the pirn in section placed on the peg.

Figs. 5 and 6 illustrate a pirn having a threaded sleeve with a bayonet joint,

Fig. 5 is a partly sectional elevation of the pirn, and

Fig. 6 is an end elevation of the from the big endof the pirn. i

Fig. '7 is an axial section of an existing pirn having means for securing the sleeve in Figs. 5 and 6 to it. 'f

Figs. 8 to 11 illustrate a pirn having Va. flanged Sleeve with camwaysfor'the bayonet-joint pins, Fig. 8 is partly an elevation and partly an-axial section-,of the pirn and the sleeve,-

' Fig. 9 is an elevation of the sleeve,

Fig. l0 is an end elevation ofthesleeve, partly `in section on the line X-X in Fig. 9, and

Fig. 11 is a section on the une XI-XI in Fig. 1o. Referring now to the drawings, and first to Figs. 1 to 4, I vis a peg, here shown as a double 4.spring peg or Northrop skewer by Way of example. 2 is its butt, and l3 is the pirn. The peg and pirn may be of any suitable and normal size and shape and the pirn maybe of layers of paper, cardboardzor the like. 4 is a sleeve which is insleeve, viewed serted in the big end of the pirn 3; 5, 5 are its bayonetslots, each with a seat 6 at itsA upper end, and 1 are the bayonet pins on the peg. y

'I'he'` sleeve 4 is preferably made offa stronger material than the 'pirn 3,for instance, ofvLmetal.

This has the advantage that the slotsv5 willnot become deformed and worn even if usedl for a long time andthe connection remains reliable. l

By arranging the sleeve 4 in the pirn 3, the perimeter of the pirn remains quite smooth so that the threads have no tendency to break, and chemical reactions of the thread with the sleeve are prevented. The sleeve in the pirn is smaller than would be a sleeve on the pirn, and of lighter weight. Furthermore, it is much easier to secure the sleeve in the pirn than on it. This is important for quantity production. The inertia of the sleeve is reduced which is particularly favorable if the pirn is used for spinning.

Preferably the inside diameter of the sleeve 4 is made a little larger than the outside diameter of the corresponding portion of the peg I so that the peg is free to yield to centrifugal and other forces and behaves like a flexible shaft. Irregularities in the size of the peg are also made up for by the clearance thus provided and seizing of the sleeve on the peg is prevented as only the material of the pirn, such as cardboard etc., and not the metal sleeve, engages the peg.

The two pins 1 which are, normaly radial, are also easily assembled Without any appreciable cost.

The peg is preferably made longer than the pirn, as best seen in Fig. 4. This not only protects the small end of the pirn but also centers the pirn on the peg. The centering is important as it facilitates the engagement of the pins I with the slots 5. It is to be observed that the radial extension of the pins 'I is such that their outer ends clear the inner wall of the pirn when the latter is moved to engage the pins with the angular slots 5.

Referring now to Figs. 5 and 6, the sleeve 4| is serrated or threaded on its perimeter and the serrations or threads are preferably of the buttress type so as to form a sort of hook point- T ing to the big end of the pirn 3|. This is important as it holds the sleeve against axial displacement on the pirn which ,might occurwhen the pirn is pulled oi the peg.

The rm hold the threaded or serrated sleeve 4| has in the pirn, may beffurther improved by applying an adhesive to the threaded or serrated portion of the sleeve. Longitudinal grooves 9, Fig. 6, are formed in the threaded or serrated portion. The grooves which may be of V section as shown, or of any other section, may be arranged at diametrally opposite sides of the sleeve but obviously any number and arrangement of grooves may be provided. The adhesive is introduced through the grooves and distributed over the serra/tions or threads of the sleeve 4|.

Referring now to Fig. 7,.this shows the adaptation of the sleeve 4I to an existing pirn 32. 0 is a fitting which may be of wood or any other suitable material and is inserted in the pirn 32. It has an axial tapered boze to t the peg and at its big end is equipped with the threaded or serrated sleeve 4i as shown in Fig. 5. By these means, the same pirns may be used for spinning and weaving which is very desirable with respect to standardization.

Obviously the fitting of a sleeve to an existing pirn is not limited to serrated or threaded sleeves.

A sleeve of particular design is illustrated in Figs. 8 to 11. The sleeve 4 has anges and I2 at opposite ends. Its shell is slightly tapered and has camways pressed into it for the reception of the pins I on the peg. In the example illustrated, two camways I4 are arranged at diametrally opposite sides of the sleeve. The camways are so deep that their outer walls are flush with the iianges and I2. Each camway I4 has a flared inlet I5 and a parallel seating portion I6 in which the pins 'I engage in the nal position of the pirn on the peg. There may be any number of camWays, each with a flared inlet for facilitating the introduction of the pins 1.

The flanges and I2 of the sleeve 43 form a flat and wide channel for the reception of one or more strips of paper or the like I1. The winding of the strip is facilitated by the iiushness of the outer walls of the camvvays 4 with the Viianges II, |2. Pasted on the strip Il in the channel is a hollow body I8 which also may be wound from one or more strips of paper or the like. The body lI8 receives the pirn 33. It may be pasted to the pirn or may be integral with it. The sleeve 43 in this manner is inserted quite firmly in the body of the pirn without any coercion. If desired, the strip or strips may be Vpasted on the sleeve 43 between its anges but 'this is not necessary.

Preferably the bayonet joint is so arranged that it is set by turning to the left, as shown, so that it will not work loose in the operation of the loom during which the pirn has a tendency to turn toward the left.

I claim:

1. A bobbin for shuttles comprising a iixed peg Yand a pirn adapted to be placed on said peg, a metal sleeve rigidly secured to the inside of said pirn at the base thereof, so as to be totally enclosed within said pirn, a thread of the buttress type on said sleeve for holding it against axial displacement in said pirn, and a bayonet joint also enclosed Within said pirn for detachably connecting .said peg and said sleeve.

2. A bobbon for shuttles comprising a xed peg and a pirn adapted to be placed on said peg, a metal sleeve rigidly secured to the inside of said pirn at the base thereof, so as to be totally enclosed Within said pirn, said sleeve having grooves for admitting adhesive between said sleeve and said pirn, and a bayonet joint also enclosed Within said pirn for detachably connecting said 4peg and said sleeve.

HANS SUMMA.

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