US1624928A - Warp-drawing machine - Google Patents

Description

. 1,624,928- H. D. COLMAN WARP DRAWING MACHINE Ori led Jan. 8, 1923 j 2 Sheets-Sheet 1 April. 19'. 1927.

April 19, coLMAN WARP DRAWING MACHINE 2 Sheets-Sheet 2 Original Filed Jan. 8, 1923 Patented Apr. 19, 192.7.

uurrsn STATES r 1,624,928 Parana? OFFICE.

HOWARD D. GOLMAN, F ROCKFORD, ILLINOIS, ASSIGN'OR TO BARBEE COLMAN COM- PANY, OF ROCKFORD, ILLINOIS, CORPORATION OF ILLINOIS.

VAEP-IJBAvVING MACHINE.

flriginal application filed. January 8, 1623, Serial No. (511,214. Divided and this application filed June 4,

This application is a division of my application Serial No. 611,214: filed January 8, 1923, and relates particularly to reed-controlled means for feeding the mechanism carriage of a warp-drawing machine.

In the accompanying drawings,

Figure 1 is a fragmental rear view' of the left-hand end of a warp-drawing machine, that is to say, the end at which the mechanism carriage starts.

Fig. 2 is a view upon an enlarged scale of a mechanism shown in the lower right-hand portion of Fig. 1.

Fig. 3 is a fragmental view of the reed showing the reed opener in engagement therewith.

Fig. 4 illustrates a yielding connection between the drive rod and the feed pawl. arm.

In the accompanying drawings, 1 denotes the bed of the machine, 2 being the upright frame member at the lefthand end of the machine. The mechanism carriage 3 is arranged to travel upon ways provided there for upon the bed of the machine. A reed opener 4 is supported upon the mechanism carriage in the usual or any preferred way. The reed opener may be of any desired character, that herein shown being substantially similar to the one disclosed in Patent No. 871,680, dated November 19,1907. The reed opener is somewhat in the form of a single-thread screw which by its rotation aLlQCl-SSlVBly opens the dents ofthe reed by spreading the splits sufiiciently to permit the needle to pass through the dent.

The reed B may be supported in the warpdrawing machine in any suitable manner. that herein shown being essentially the same as the construction fully disclosed in Patent No. 1,169,087, dated January 18, 1916. The reed is supported by means of clamps 5 attached to a bar 6 which is provided with rollers 7 resting upon a rail 8 forming part of the stationary framework of the machine.

The means herein shown for driving the mechanism carriage 3 longitudinally of the machine comprises a feed screw 12 engaging a nut 13 on the mechanism carriage. The means for transmitting power to the feed screw 12 is controlled by the reed, as will now be described.

Referring to Fig. 2, it will be seen that a main drive shaft 14 carries at its left-hand Serial No. 118,605.

enda crank 15 to which connected a rod 16. The forward end of the connecting rod 16 is attached to an arm 17, whereby rotation of the crank 15 imparts oscillation to the arm 17, The arm 17 is pivotally mounted upon a stub shaft 18 supported by a bracket 19 attached to the outer side of the upright frame member 2. A ratchet (log 20 is pivotally mounted upon the arm 17 and is held in engagement with a ratchet wheel 21 by means of a helically' coiled expansive spring 22. The ratchet wheel 21 is secured to the side of a spur gear wheel 23 which is rotatably mounted upon the stub shaft 18. The gear wheel 23 meshes with a pinion :Zet-wl'nch is fixed to the feed screw 12.

Means is provided for preventing the arm 17 from swlnging far enough .to allow the ratchet dog '20 to snap behind a tooth of the ratchet wheel 21 when the relation of the drawing-in mechanism to the reed is such that the mechanism carriage need not be moved. Inasmuch as the connecting rod 16 moves through an unvarying cycle, it is necessary to provide a yielding connection between said rod and the arm 17. One form of yielding connection is illustrated in Fig. 4; wherein it will be seen that the connecting rod 16 is provided with an elongated opening 25 for a pivot pin 26 on the arm 17. A block 27 slidably mounted in the open ing 25 is held against the pivot pin 26 by means of a spring 28 and a plunger 29, the

pivot pin 26 at the forward end of the elongated opening 25 except when the oscillation of the arm 17 is interfered with.

The means for controlling the oscillation of the arm 17 comprises an arm 30 rigid with the arm 17 The arm 30 is provided with a hardened steel plate 31 adapted to engage the lower end of a vertically-reciprocated bar 32. The lower end of the bar is guided in a block 33 which is secured to the bracket 19. The upper end of the bar 32 is pivoted to an arm 3% which is pivotally supported in a bracket 35 secured to the end frame member 2. Rigid with the arm 34 is a crank arm 36 to which is connected one end of a link 37. The other end of Said link is connected to the bar 6. A helically coiled contractile spring 38 attached at one spring 28 being strong enough to keep the end to the bar 32 and at its other to the bracket serves to counterbalance the weight of the bar 32 and the bell crank 34t36, so that a light push or pull imparted to the link 37 is suflicient to raise or lower the bar 32. The extent of movement of the bar 32 is limited by engagement of the crank arm 3 1- with stop pins 39 on the bracket 35.

In operation. if the mechanism carriage .3 travels toward the left (as viewed in Fifi. 1) faster than the reed opener tscrews its way through the reed. the reed will. be carried toward the left with the mechanism earriage, thereby causing: the bar 32 to be lowered into position to limit the oscillation of the arm 30. thus preventing" the ratchet dos! 20 from taking a tooth of the ratchet wheel 21, and thereby causing suspension of the travel of the mechanism carriage. The continuing operation of the reed opener t then causes the reed to travel toward the right- (as viewed in Fig. 1) whereby the bar raised out of the path of movement of the arm 30, and movement is again imparted to the mechanism carriage. In this way, the travel of the mechanism is interrupted from time to time as may be necessary to adapt the feed movement of the carriage to the sley of the particular reed being operated upon.

It will be apparent that the present invention obviates the necessity of manually adjusting the feed of the mechanism carriage to the sley of the reeds through which warps are to be drawn,

The present embodiment of the invention is especially designed for application to existing warp-drawing machines the parts of the controlling mechanism being so constructed that they may be readily attached to existing machines.

I claim as my invention:

A warp-drawing machine having, in com" bination. a pivoted arm, yieldable' means for swingin said arm. a ratchet wheel pivoted on the axis of said arm, a dog on said arm arranged to engage the ratchet wheel, a mechanism carriage, means driven by said ratchet wheel for feeding the carriage, operating mechanism on said carriage, means for movably supporting a loom reed for engagement by said operating mechanism, said reed beingfree to travel with said carriage, an arm rigid with the first mentioned arm, a bar mounted for vertical movement, the lower end of said bar when lowered being arranged to limit the oscillation of said arms, counter-balancing means acting upon said bar, a hell crank lever to which the upper end of the bar is connected, and means rendering said bell crank lever sensitive to movement of said reed.

In testimony whereof, I have hereunto atiixed my signature.

HOWARD D. GOLMAN.

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