US3030048A

US3030048A - Pendulous bobbin holder

Info

Publication number: US3030048A
Application number: US754268A
Authority: US
Inventors: James C Keyworth
Original assignee: Bendix Corp
Current assignee: Bendix Corp
Priority date: 1958-08-11
Filing date: 1958-08-11
Publication date: 1962-04-17
Anticipated expiration: 1979-04-17

Description

April 17, 1962 J. c. KEYWORTH PENDULOUS BOBBIN HOLDER 2 Sheets-Sheet 2 Filed Aug. 11, 1958 IN V EN TOR. W W

James 6.

jm. 972m:

United States Patent M The present invention relates to a pendulous bobbin holder and more particularly to a latch type holder, especially adapted for manufacture from plastic materials or die-castings.

It is an object of the present invention to provide a novel bobbin holder which is eifective and reliable in operation and simple and economical in construction.

It is another object to provide such a device providing a small number of moving parts all of which are adapted for fabrication by economical methods. Further objects and advantages will be apparent from the following description taken in connection with the accompanying drawings in which:

FIG. 1 is a side elevation, partly broken away and in section of a preferred embodiment of the invention, showing a bobbin mounted on the holder;

FIG. 2 is a side elevation of the holder shown in FIG. 1, rotated through 90 around its vertical axis;

FIG. 3 is a bottom View of FIG. 2;

FIG. 4 is a detail in perspective of a portion of the bobbin holder illustrated in FIG. 1, showing more particularly the latch and its indexing means; and

FIG. 5 is a vertical substantially mid-sectional view of a second embodiment of the invention.

In FIG. 1 of the drawing there is illustrated a bobbin holder comprising an elongated body 1 which is generally cross shaped in cross section as shown in FIG. 3, and

which is pendulously supported by an anti-friction bearing 2 from a bolt 3 fixedly mounted in a member of a spinning frame such as a creel board 4. The free lower end of the body 1 is arranged to enter the upper end of a hollow bobbin 5, and has an oblong latch member s rotatably mounted on a horizontal pin 7 in said body and adapted to project therefrom and engage an interior shoulder 8 in the bobbin when the latch is positioned with its major dimension horizontal, as illustrated.

A centering collar 9 is slidably mounted on the body 1 and is pressed against the upper end of the bobbin 5, when it is mounted 011 the holder, by means of a compression spring 11 which bears or is seated at its lower end or convolution on the flange 12 of the collar and at its upper end or convolution against a shoulder 10 formed by an enlargement of the body 1. In order to limit the travel of the collar 9 on the body 1, and to prevent rotation of the collar on said body, vertical flanges 13, 14 (FIG. 4) are formed on said body and provided with

shoulders

15, 16 adapted to be engaged by

tangs

17, 18 sheared and bent inwardly from the upper cylindrical portion of the collar 9.

The latch 6 is formed by two oblong plate members 19,

Z1 (FIGS. 2 and 4) which are separated by a square ratchet element 22, the three elements of the latch being formed integrally or being rigidly unified in any suitable manner. Means for indexing the major dimension of the latch 6 from its horizontal to vertical position and vice versa, is provided in the form of a pawl 23. The pawl 23 is an integral extension of the compression spring 11 formed adjacent the lowermost coil or convolution of the spring. It extends radially inwardly through a slot 25 in the collar 9, a distance suflicient to cause it to engage a channeled portion of one of the vertical cross members of the elongated body 1 and thereafter is axially reposed or nested in the channel so as to extend downwardly into operative engagement with the latch 6. The downward Patented Apr. 17, 1962 extension of the pawl 23 passes between

plates

19, 21 of the latch 6 and is so tensioned as to bear elastically against the side of the ratchet member 22. Y The pawl is offset laterally within the channel adjacent its lower end to provide a shoulder 24. The shoulder 24 is so located on the pawl that, when the collar 9 is raised by the application of the bobbin 5 to the holder, the shoulder 24 will be raised above the location of the ratchet 22 and subsequent downward movement of the pawl will engage and rotate the ratchet through FIGURE 4 best illustrates the cooperative engagement between the pawl 23, the collar and

slot

9 and 25, respectively, and the channeled portion of the vertical cross member of the body 1. The combined effect of the slot 25 and the body channel suffices to guide and properly position the pawl.

The collar 9 is illustrated as being slotted as at 25, to enable the pawl to properly engage the body channel. This method provides a facile method of assembly. The compressive force exerted by the spring 11 between the shoulder 10 and the flange 12 of the collar is sufiicient to overcome any tendency towards undesirable relative movement between the collar 9 and the pawl 23 due to the slot opening above the radial extension of the pawl. If relative movement were of concern, then a small circular aperture could be substituted for the axial slot 25 thereby preventing any independent movement between the collar and spring. This alternate method would, to a degree, complicate the assembly of the holder.

In the operation of this embodiment of the invention, the major dimension of latch 6 will normally be in its vertical position so that it does not project out of the holder when the holder is not occupied. When it is desired to mount a bobbin on the holder, it is pushed up from below, engaging the collar 9 and moving it upward until the vertical movement is arrested by engagement of the

lugs

17, 18 with the shoulders 15. At this time the internal shoulder -8 of thebobbin is substantially above the position of the latch 6 and upon downward movement of the bobbin and collar 9, the shoulder 24 of pawl 23 engages the ratchet member 22 and rotates the major dimension of latch to its horizontal position so as to arrest the downward movement of the bobbin and retain it on the holder. Release of the bobbin is brought about by a repetition of the reciprocation of the collar 9, thus indexing the major dimension of latch '6 to its original vertical position.

In FIG. 5 of the drawing, there is illustrated a second embodiment of the invention in which the body 51 of the holder is tubular, and collar 52 slidably mounted thereon has

tangs

53, 54 extending through diametrically arranged

axial slots

55, 56 to support or seat the bottom convolution of the pawl spring 57 housed therein.

The latch 58 is pivoted on the pin 59 within the body 51 of the holder and projects through openings 61, 62 in said body when its major dimension is horizontal.

The remaining parts of the bobbin holder and its mode of operation are the same as in the embodiment previously described.

Although two embodiments of the invention have been shown and described in detail, it will be understood that changes may be made in the design and arrangement of the parts without departing from the spirit of the invention.

I claim:

1. In a latch type pendulous bobbin holder: an elon-,

gated body member insertable in the upper end of a hollow bobbin; means for pendulously and rotatablysupporting said body; a collar mounted for limited sliding movement on the body and including an outwardly extending flange at its lower end providing an integral spring seat; a spring surrounding the body and collar and having the lowermost convolution engaging the seat to urge said collar toward its lowermost position on the body; an oblong latch member pivoted in said body on a horizontal axis below said collar and arranged to project therefrom for engagement with an internal shoulder in the bobbin when the latch is positioned with its major dimension in a horizontal plane; means for indexing the latch to bring it into and out of projecting position, including a ratchet on said latch, said spring providing a single integral elastic pawl member extending downwardly within said body to yieldably bear against the ratchet whereby the ratchet is restrained against undesirable rotational displacement, said pawl including a shoulder adjacent its lower end in position to engage said ratchet and rotate the latch by downward movement of the pawl; said collar and body being slotted to allow insertion of the pawl portion of the spring into operative position relative to the latch; and, said body having means providing a guide for vertical move ment of the pawl member.

2. In a latch type pendulous bobbin holder: an elongated substantially cross-shaped body member insertable in the upper end of a hollow bobbin; means for pendulously and rotatably supporting said body member; a collar including an inwardly extending tang mounted for limited sliding movement on the body member, said collar providing an integral spring seat; shoulder means formed on a cross-arm of said body member engageable by said tang to limit the movements of said collar; an oblong latch member formed of a pair of similar elements spaced axially by a ratchet member located therebetween pivoted in said body member on a horizontal axis below said collar, said spaced elements arranged to project from said body for engagement with an internal shoulder in the bobbin when the latchi's positioned with its major dimension in a horizontal plane; a spring having the lowermost convolution engaging said seat and urging said collar towards its lowermost position on the body, said spring providing a single integral elastic pawl member adapted for cooperation with the ratchet member for indexing the latch to bring it into and out of projecting position, said pawl member extending downwards within a cross-arm of said body to yieldably bear against the ratchet member whereby the ratchet member is restrained against undesirable rotational displacement, said pawl being guided during vertical movements by said spaced elements, and said pawl including further a shoulder adjacent its lower end in position to engage said ratchet to rotate the latch responsive to downward movement of the pawl.

Nichols Jan. 4, 1910 Noguera Oct. 1, 1946