US1713959A - Means for controlling the nippers in heilmann and like combers - Google Patents

Description

C. GEGAUFF IBANS FOR CONTROLLING THE NIPPERS IN HEILMANN AND LIKE COMBERS May 21, 1929.

Filed Aug. 1.6, 1926 Patented May 21, 1929.

UNITED STATES PATENT OFFICE.

CHARLES GE'GAUFF, or MULHOUSE, FRANCE, ASSIGNOR T0 socinrn ALSACIENNE DE CONSTRUCTIONS MECANIQUES, or MULHOUSE, FRANCE. I

MEANS FOR CONTROLLING THE NIPPERS IN HETLMANN AND LIKE COMBERS.

Application filed August 16, 1926, Serial No. 129,479, and in France August 19,1925.

ment from the combing position to the de taching position, and vice-versa, the movement during combing being tangential to the circular comb.

In this type of comber the detaching means and the circular comb are generally fixed in'space, i. e. the'axis of the bottom detaching roller and the axis of the circular comb retain the same position in space while the nippers are moved,as also the cop comb.

The opening and closing of the nippers are efiected during displacement of the latter and in order the better to present the lap to the detaching rollers it is necessary that in proximity to these rollers, the path of movement of the end of the lower jaw of the nipper should be of substantially the same direction as the lap, while, on the other hand, in the combing position this path should be directed tangentially to the circular comb so as not to risk damaging the needles of the circular comb in case of accidental movement of the nippers out of their proper path, this beingalways a possibility having regard to the heavy weight of the nippers in movement.

Finally, it is still necessary that this latter part of the movement towards the circular comb should be effected by the end of the upper jaw, which should then brush the points of the needles of the circular comb while the lower jaw should then press against the upper jaw to grip the lap being combed. The upper jaw of the nippers should take a particular path, of S-shape, i. e., two curves, concave and then convex downwardly terminating tangentially of or concentrically with the circular comb and only the upper jaw should effect and possess this latter tangential movement.

The present invention has for its object to obtain in a more perfect manner than in known arrangements the trajectory described by the upper nipper when passing from combing to detaching position and ,vice- 'versa.

The accompanying drawing illustrates by way of example one embodiment of the invention. This figure is a diagrammatical sectional view taken on a plane perpendicular to the circular comb. The feeding means of textile matters to the comb are not shown in the drawing, said feeding means being in no direct relation to the object of the invention.

Referring to the drawing, a, is a circular comb mounted on the shaft a; b and 6 are the detaching rollers; 0 is a belt connecting the roller 1) and a] somewhat largertensioning roller 0 and conveying the combed matters. 1

The mechanism comprises a lower arm u, a cam-like profiled path a, being provided at the lower side of said arm and resting on a roller 00,, said arm carrying the lower jaw 6 of the nippers. This arm is pivoted at z to a lever is, keyed on and receiving from the shaft 72 a reciprocating angular movement of the extent i- I A second arm 77 carrying the upper jaw e of the nippers, is pivoted at h to the first mentioned arm. This second arm is provided with a profiled (cam) path m, m applied against the roller Z the pin Z of which is fixed to the frame of the comber. A return spring n attached to the frame of the comber at a convenient point n applies the upper arm against the roller Z When in combing position (as shown in the drawing) the two nippers are pressed against each other with the yarn to be combed interposed between them and in a proximity of the needles of the circular comb. When in detaching position, the

nippers are brought in front of the detaching rollers Whereby the last catch hold of. the combed yarn. During the movement of the nippers from the combing tothe detaching position and vice-versa, the lower end of the upper jaw describes the trajectory 7*, f which has the shape of a, lying S, that is to say is formed of'two curves, concave and then convex downwardly. lVhen arriving in the vicinity of the combing position, the lower end of the upper jaw 6 moves tangentially to the circular comb,

The roller forms a rest for the cam path 20 of the lower arm u of the nippers,

the pin of this roller being carried by aspring yarn'to be combed is of abnormal thickness. 7

In that case the roller Will yield to a certain extent While continuing to exert, during the combing, the spring pressure ensuring a good gripping of the yarn.

In a modified construction, the roller m may be mounted on a journal provided on the arm carrying the lower aw of the nippers, with or Without an interposed. spring, the cam-like rolling path u, ubeing then fixed to the frame of the colnber for instance (With or Without an interposed spring).

hat I claim is:

In a comber of the class described, in combination with a revoluble combing cylinder and a pair of detaching rollers, a nipping mechanism comprising a lower arm and an upper arm pivotally connected to said lower.

arm and means to impart reciprocating motion to the lower arm, said arms being provided respectively at their free ends With lower and upper jaws, a roller on which the lower arm travels, said arm having a cam face bearing on said roller and aranged to cause the free end of said jaw as the same passes over the combing cylinder to move in a compound curved path tangential to the upper side of said combed cylinder and leading to a point opposite the lower detaching cylinder, and a roller which bears on the upper side of said upper arm,

said upper arm having a spring arranged to CHARLES oEoAUrF

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