US572839A - stoll - Google Patents

Description

'Sheets-Sheet 2.

(Nb Model.)

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Patented Dec. 8, 1896..

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UNITED STATES PATENT GEFICE.

HEINRICH STOLL AND FRIEDRICH MAERCKLIN, OF REUTLINGEN, GERMANY.

KNITTING--hf'i/CHINEl SPECIFICATION forming part of Letters Patent No. 572,839, dated December 8, 1896. Application i'lled April 6, 1895. Serial No. 544,784. (No model.) Patented in Germany November 24, 1893, No. 77,951.

To a/ZZ whom it may concern,.- A

Be it known that we, HEINRICH SToLL and FRIEDRIcH MAERCKLIN, citizens of Germany, and residents of Reutlingen, Germany, have invented certain new and useful Improvements in Knitting-Machines, (patented in Germany November 24, 1893, No. 77,951,) of which the following is a specification.

Our invention relates to improvements in straight-knitting machines, and particularly to an improvement on the invention patented by us July 21, 1894, No. 523,820.

The object of our invention is to provide a simple and more convenient intermediate cam n and means for operating the same and to avoid the principal disadvantage of the construction shown in said patent, which will be mentioned hereinafter.

Vith this object in View our invention consists in the features, details of construction, and combinations of parts, which will first be described in connection with the accompanying drawings and then particularly pointed out in the claims.

In the drawings, which illustrate only so much of a fiat-knitting machine as is necessary to explain the features of the present invention, Figure 1 is a bottom plan view of the cam mechanism. Fig. 2 is a transverse sectional view of the same. Fig. 3 is a detail View, to be explained hereinafter.

Referring to the drawings, it will be seen that the two needle-beds are placed in one plane and a double needle ca is employed. This double needle is pushed alternately from the needle channel or slot of one needle-bed e to the corresponding channel of the opposite needle-bed c by the operation of the carriage. This is effected by means of the jacks b, which are provided with the toothed inner ends c and with the upward-extending lug or arm d, which projects above the slotted needle-bed, so as to be engaged by the cams, in order that the jacks may be pushed to and fro. Each cam device consists of an outer stationary cam m, an inner stationary cam n', two laterally-adjusted cams m', and an intermediate movable cam or block n, as will be plain from Fig. 1. The outer stationary cam fm has a concavity at its inner end, in which the said intermediate cam 'n is located.

The above mechanism, with the exception of the intermediate cam or block n., is similar to the mechanism described in our previous patent above referred to, while the said intermediate block n constitutes, in combination with the other parts, the present invention. In the said patent above referred to this intermediate block n was made vertically movable in the raceway, being lifted and held up out of its operative position by a handlever in order that the jacks on its side of the machine might not be moved by the operation of the carriage. By this arrangem entwhen the cam is raised and the machine is run at a great speed the tongues of the jacks are thrown back and forth in the raceway at' the point beneath the cam, whereby the jacks fail to operate properly and irregular knitting is the result.

This disadvantage is avoided in the present invention, wherein the said intermediate cam or block n is made rotatable, being placed in an eccentric manner with relation to its axis of rotation, so that when in one position the cam will operate the jacks to the full extent of their throw, While when rotated to the opposite position the raceway opposite the said cam-block fn, will be enlarged to such an extent as to permit the jacks to pass through the raceway without being forced inward to their full extent, whereby the jacks fail to engage the needles, and consequently the opposite side of the machine, which is supposed to have its cam-block n adjusted to throw the jacks to their full extent, will do the knitting. As will be seen from Fig. 1, the cam-block ais polygonal in outline and has two operating-faces on opposite sides of the block, the latter being attached to the stud o, which projects upward through the plate f and is provided with a knob o', a spiral spring o2 surrounding the stud and normally tending to force the stud and cam-block n downward. Between the plate f and the knob is placed a block f through which the stud 0 projects and which is provided with two small holes or recesses one hundred and eighty degrees apart. The knob is provided with a single downward-projecting teat or button t, which is adapted to enter either one of the said holes or recesses, thereby holding the stud o and the cam-block n against accidental rotation. The said polygonal cam-block is so located on the stud o that one side or operating-face is IOO farther away from the center of said stud than the other side, so that when placed with the iirst-mentioned side inward it contracts the raceway between the cams and causes the jacks to move inward to their full extent, while when placed with the other side or operating-face inward toward the raceway the latter is enlarged and the jacks are not thrown to their full extent inward, thereby rendering said jacks inoperative. This rotation of the cam-block n and the stud o is done by lifting up on the knob o', so as to compress the the cam cannot be thrown out of adjustment by the knob catching in the sleeve of the operator.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

In a knitting-machine, the combination, with a carriage, and an inner and an outer cam secured to the carriage and havinga raceway between them, said outer cam having a concavity at its inner end, of a rotatc ble stud mounted in the carriage, a cam-block rigidly secured to said stud and located in the concavity of the outer cam., said cam-block having two operating-faces on opposite sides of the block removed from the axis of rotation of the stud and at unequal distances from such axis, each face, when in operative position, projecting inward beyond the inner end of the outer cam, a spring normally tending to force the cam-block downward, a knob at the upper end of the stud and provided with a downward-projecting teat,and a block Xed to the carriage and provided with two recesses one hundred and eighty degrees apart and arranged to receive the teat, substantially as set forth.

'In testimony that we claim the foregoing as our invention we have signed our names in presence of two subscribing witnesses.

HEINRICH STOLL. FRIEDRICH MAERCKLIN. Witnesses:

CARL HUBER, ANTON EIFERT.

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