US1234742A - Mechanical movement. - Google Patents

Description

K. EGGART..v MECHANICAL MOVEMENT. APPLICATION FILED 0CT.30 19161 Patented J uly, 31, 1917.

UNITED sTATEs PATENT oEEioE.

KARL EGGART, 0F ARBON, SWITZERLAND, ASSIGNOR TO THE FIRM OF ADOLPI-I SAURIER,

` OF ARBON, SWITZERLAND. f

MECHANICAL MOVEMENT.

i Specication of Letters Patent. Patented July 31, 1917.

Application filed October 30, 1916. Serial No. 128,403.

To all whom t may concern.'

Be it known that I, KARL EGGART, a citizen of the Republic of Switzerland, residing at Arbon, Switzerland, have invented certain new and useful Improvements in Mechanical Movements; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and vuse the same, reference being had to the accompanying drawings, and to letters or gures marked thereon, which form a part of this specification.

This invention relates particularly to mechanisms for regulating the stroke or extent of movement of parts of embroidering machines which perform special functions, as such parts may come into operation, as for instance the minor and major threadguides. j Y

The stroke regulating mechanism which is shown herein as an embodiment of the invention includes a cam-disk arranged concentrically with the axis of an oscillating arm and provided with a cam-groove which comprises a plurality of concentric sections, and a plurality of inclined sections connecting said concentric sections. rlhe inclined sections are adapted to effect a shifting or adjustment with respect to the center of movement of said arm of a sliding part carried by said arm and operatively connected to the party of the embroidering machine whose stroke is to be regulated. The concentric sections actas guides for the swinging arm during its oscillations.

It may be advisable in some cases to let said cam-disk cooperate with a member which is operatively connected to a shaft acted upon either by the jacquard mechanism of the embroidering machine or by hand.

It may further be advisable in some cases to provide the cam-disk with a spiral or noncontinuous groove and to provide means whereby the operative connection between said shaft acted upon by the jacquard mechanism 4or by hand and a member engaging with the cam'disk, may be interrupted as groove.

Fig. 3 is a plan view, partly in section on the line C-D of Fig. 2, of a detail.

Fig. 4 shows a modification of the stroke regulating mechanism.

Fig. 5 Fig. 4, and

Fig. 6 is a plan view of this modification,

partly inY section, on the line Gr'-H ofV Fig. 5.

is a section on the line E-i-F ofV In carrying theV invention into effect as driving shaft l a cam 2. This acts upon a roller 3 mounted on a pin 4, which is carried by a hollow or tubular arm 5 adapted to oscillate on a stationary bearing 5. The

shown in Figs. 1 to 3 thereV is'fixed to a arm carries a slide or bolt 6 which carries a transverse pin 7. To the latter is connected a rod 8, which is also connected to the minor thread-guide 9. The slide 6' also carries a stud 10" on which is mounted a roller 10 engaging the groove of a toothed cam-disk'12.

" The groove referred to comprises sections 13 which are concentric to the centerY of disk 12 and inclined sections 14, each of which connects two sections 13. The sections 13 and 14 form together a continuous or endless The toothed disk 12 engages a toothed wheel 15 fixed on a shaft 16 to which may be imparted an intermittentV motion either by means of the jacquard mechanism of the embroidering machine or by hand.

The operation of this stroke regulating /mec'hanism is as follows:

The rotating cam 2 effects upon each revolution an Oscillation of arm 5 throughthc angle a? (F ig. 2) for the purpose of imparting a working stroke to rod 8, roller 10 being moved in and guided by a concentrlc section 13 of the groove of disk 12. Should it be desired to vary the stroke off the minor thread-guide 9, there is effected a rotation of shaft 16, such that the disk 12 is turned about an angle -i-g/ (Fi-g. 2). Upon this rotation of the disk 12 the inclined section 14 of its groove engaging with the roller 10 effects a shifting or adjustment of slide -6 with respect to the arm 5, so that said arm ,5 imparts a dierent stroke to rod I8, and therefore also to the threadguide v9, upon its renewed oscillation. f

According as the disk 13 is turned each .time through a greater or smaller angle .fr-iw, ,a greater or smaller variation `oit the stroke of the thread-,guide 9 may be obtained. It will be seen, that by means .of a .cam-disk provided with a closed yendless groove as shown in Fig. 2 it is possible to vary the stroke of the thread-guide from a minimum to a maximum and then from a maximum to a minimum.

In the embodiment of the invention shown in Figs. 4, 5 and 6 the sections 18 and 14 of the groove in the disk 12 form a spiral or noncontinuous groove. In such a stroke regulating mechanism it is, however, necessary to provide means to prevent the shaft 16, which is acted upon by the jacquard mechanism or by hand, from continuing the rotation of the cam-disk after the end .of the groove abuts the roller 10. Io this end `there is provided on the toothed cam-disk 12 for instance a lateral projection or cam 17. The shaft 16 carries a clutch-disk 18 provided with at least one hole 19. 20 denotes a toothed wheel, which is movable longitudinally with respect to the clutch-disk 18 and is adapted to be operatively connected thereto. For this purpose there is provided on said wheel 2O a lateral projection 21, which may be pushed into the hole 19 of disk 18. Toothed wheel 20 meshes with toothed disk 12 and is mounted on a shaft or spindle 22 provided with a knob 23. The parts 18 and 2O are normally held in engagement by a spring 24. 25 denotes a shifting lever cooperating with the projection 17 and bearing against a collar on the shaft or spindle 22 and adapted to effect the disconnection of the parts 18 and 20. This takes place when the parts have lthe position shown in- Fig. 4. The latter corresponds to one of those positions of the disk 12, in which the roller 10 just abuts one end of the cam-groove of the disk 12. Vhen the parts 18 and 20 are out of engagement, wheel 20 is, however, still in mesh with the toothed disk 12, so that the roller 10 is kept in the proper position within the groove of the disk 12 during oscillation of the link 5. `It will be seen l.tion the roller 1.0 is mounted directly 7on the pin '7 (Fig. '6), so that the pin 10 shown in Figs. 2 and 8 may be dispensed with.

Although this invention has been .de scribed .as .applied to the case in which it effects a regulation of the stroke of the minor thread-guides it is to be understood that it is equally applicable to other cases in which the stroke or extent of movement of a reciprocating element or of a part actuated through a reciprocating element has to be regulated.

VI claim as my invention:

1. A mechanism tor .the purpose described comprising an .oscillating arm, a cam mounted concentri'cally with the axis of oscillation fof said arm, and slide Ymounted on said arm .and in operative eng-agement with the cam to be shifted thereby onsaid arm.

2. A mechanism for the purpose described comprising an oscillating arm. a cam mounted concentrical-ly with the axis of oscillation'VVV oi said arm, a slidemounted on said arm and in operative engagement with the cam to be shifted thereby on said arm, anda connection Vfrom said arm. Y

8. A mechanism for the purpose described comprising an oscillating arm, a grooved cam-disk mounted concentrically withV the axis of oscillation of said arm, and a slide mounted on said arm and having engagement with the groove of the camdisk.

4. A mechanism for the purpose described comprising Van oscillating arm7 a grooved eamdisk mounted .concentrically with Vthe axis of oscillation of said arm, and having a plurality of concentric grooves and a plurality of inclined grooves connecting the concentricy grooves, and a slide mounted on comprising an oscillating arm, means to .os-`

cillate said arm, a cam mounted concentrically with the axis of oscillation of said arm,

a slide `mounted on* said arm and in operative engagement with the cam to be shifted thereby on said arm, and a link connected to said slide. Y

- 7. A lmechanism for the purpose described comprising a tubular arm mounted to oscillate upon a transverse axis, a grooved camlie disk mounted concentrically with the axis of oscillation of said arm, and a slide mounted in said arm and having a stud to enter the groove of the cam.

8. A mechanism for the purpose described comprising a tubular arm mounted to oscillate upon a transverse axis, a grooved camdisk mounted concentrically with the aXis of oscillation of said arm, a slide mounted in said arm and having a stud to enter ythe groove of the cam, and a link connected to said slide.

9. A mechanism for the purpose described comprising an oscillating arm, a grooved cam-disk mounted concentrically with the axis of oscillation of said arm, means to rotate said cam-disk, a slide mounted on said arm and in operative engagement with the cam-grooverto be shifted thereby on said arm, and means actuated by the rotation of 20 the cam-disk to disconnect the cam-disk from its rotating means.A

10. A mechanism for the purpose described comprising an oscillating arm, a grooved cam-disk mounted concentrically 25 With the axis of oscillation of said arm, a driving gear for said cam-disk, a clutch for driving said gear, and means actuated by the rotation of the cam-disk to open said clutch.

In testimony that I claim the foregoing 3o as my invention, I have signed my name in presence of tWo subscribing Witnesses.

KARL EGGART.

Witnesses:

FRANK DINNUKE, EMIL MEILE.

Copies of this patent may be obtained for ve cents each, by addressing ther0ommissioner of Patents.

Washington, D. 0.

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