US737910A - Stop-motion for cloth-tentering machines. - Google Patents

Description

No. 737,910. PATENTBD SEPT. 1, 1903.

J. L. DABBSi 7 STOP MOTION FOR GLOTH TENTERING MACHINES.

APPLICATION FILED AUG. 30. 1902.

NO MODEL. 2 SHEET I 1.

WITNESSES: IN VENTOH WWW WW A rom/E rs.

No. 737,910. PATENTED SEPT. 1 1903. J. L. DABBS. STOP MOTION FOR CLOTH TENTBRING MACHINES.

APPLIUATIOR FILED AUG. 30, 1902.

N0 MODEL. 2 SHEETS-SHEET 2 i l L W i I i l l l i m VENTOH 7/ L. ,ZZa6Z6 A TTOHNE rs.

Uiru STATES Patented September 1, 1903.

ATENT OFFICE.

JOHN L. DABBS, OF ROCKI-IILL, SOUTH CAROLINA, ASSIGNOR OF ONE-HALF TO JOHN R. LONDON, OF ROOKHILL, SOUTH CAROLINA.

STOP-MOTION FOR CLOTH-TENTERING MACHINES.

SEECIFICAIION forming part of Letters Patent No. 737,910, dated September 1, 1903. Application filed August 30, 1902. Serial No. 121,596. (No model.)

To all whom, it may concern.-

Beit known that 1, JOHN L. DABBS, residing at Rockhill, in the county of York and State of South Carolina, have invented certain new and useful Improvements in Automatic Stop- Motions for Oloth-Tentering Machines, 'of which the following is a specification.

It is well known to the skilled in the art that much trouble and loss of time and waste IO of cloth is occasioned by the edges of the cloth becoming detached from the tenterchain pins of a cloth-tentering machine, and all of which being well understood it becomes necessary for me in the statement of my invention to only refer to the general object of my invention, which is to provide automatic means of new and improved construction adapted to stop the centering-machine should one or both edges of the cloth become detached from the tenter-chain pins.

WVith such objects in view I have invented the peculiar stop-motion mechanism which I will now describe in detail, with reference to the accompanying drawings, forming a per- 2 5 tion of this specification, and in which- Figure 1 is a view showing my improved stop motion mechanism in side elevation. The view also shows with broken-away ends so much of a cloth-tentering machine in side elevation as will illustrate the connection of my invention. Fig. 2 is a top plan view of the parts shown in Fig. 1, and Fig. 3 is an enlarged side elevation of mystop-motion device.

In the view one side-supportin g frame for the 3 5 belt-shifter-releasing devices is removed and the shaft and bar connecting the two side frames are shown in cross-section.

As my invention is confined tothe special stop-motion devices hereinafter described 0 and as the art and also machinery used in I tentering cloth are well understood by the skilled, I have deemed it necessary to show in my drawings only so much of the tentering-machine as will give a full understanding of my invention. It may be well, however,

to briefly point out enough of the common features of such a machine as will render my stop -motion devices and their connection with the tentering-machinc .fully understood.

To such end I would say that the letter A in my drawings designates that portion of a common machine with which my invention is connected. These machines employ two side members 13 B, adapted to be spaced apart and to support two endless chains, each having a 5 5 series of pins adapted to engage theselvages of the cloth fed to the machine. The members B B must have some support, as indicated at B, Figs. 1 and 2. Should the cloth become detached from these pins itis apparcut that much thereof would be improperly stretched, and thus rendered defective before said detachment would be noticed by the operative. To automatically stop the machine when the goods become detached from the tentering-pins,as above stated, I have devised the peculiar mechanism operating to automatically stop further operation of the machine so soon as one selvage of the cloth becomes detached from the tenter-chain, which I will describe in detail, as follows:

In carrying out my invention I employ two rollers or wheels O,rotatab1y mounted on the free ends of the arms D D, having pivotal support near each side member 13. The rol1- ers or wheels 0 are arranged to roll upon the cloth being stretched, just inside of the tentering-chains and directly over levers D I), fixed to a transverse shaft E. To regulate the pressure of the rollers 0 upon the cloth, the arms D are provided with adjustable weights F.

G indicates an arm fixed to the shaft E and extending downwardly and having pivotedto its lower end one end. of a rod I-I, extending to the trigger I.

J indicates a rock-arm having pivotal support on the frame K, with its free end adapted to engage an adjustable shoulder L on the rod M, extending to either a belt-shifter (not shown) or other power means operating the tentering-machine. The trigger I is pivoted to and extends upwardly from the inner end of the rock-arm J, as shown in Fig. .5.

N indicates a pivoted shoe supported by the frame K and with its free end extended under a cam-wheel O on the shaft P. The shoe N is held in contact with the cam-wheel O by a spring Q, and the free end of the rockarm J is held in engagement with the shouln o der L on the shaft M by a similar spring R, all as clearly shown in Fig, 3. For reasons as will appear farther on the cam is continuously rotated while the tentering-machine is in operation by a drive-chain S, (see Figs. 1 and 2,) connecting a sprocket-wheel T on the shaft P and a similar sprocket-wheel U, supported by and deriving motion from the cloth-winding beam V. If desired, the drivechain S may extend from suitable power means overhead or at some other position.

W indicates a cushion-spring arranged under the levers D, operating to hold the free end of said lever up near or in contact with the under side of the cloth. This spring W may have anysuitable support on the side members'B and is located as best shown in Fig. 3.

X indicates a suitable lever having pivotal support on one of the tentering-machine supports B and shown in Fig. 1. The lever X is intended for drawing backwardly the shifter-rod M to reengage the free end of the rock-arm J with the shoulder L. It is understood that when the free end of the rocker-arm J is in engagement with the shoulder L the shifter-rod M must be under tension in direction of arrow. (See Fig. 3.)

When the machine is in operation, all the parts of my automatic stopping mechanism are in position, as best shown in Fig. 3 of my drawings. Now it is apparent that should the cloth become detached from the tenterchain pins it will draw or sag, as indicated at A in Fig. 2, and that when this detached edge of the cloth passes under the weighted roller 0 on that side of the machine the roller is free to drop down upon the lever D with weight enough to compress the spring W and through the arm G and the rod H draw the trigger I against the free end of the shoe N. It is understood from statements hereinbefore set forth that the cam O is constantly revolving with the shoe N held against it by the spring Q. Now obviously when the cam O rotates the free end of the shoe N will be forced above the upper end of the trigger I. At this instant the weighted roller C, resting on the lever D through the opening formed by the detached edge of the cloth, as above described, will draw trigger I through the connecting devices under the free end of the shoe N. Upon the continued rotation of the cam O the free end of the shoe N will be pushed downwardly against the upper end of the trigger I, and thus lift the forward or opposite end of the rock-arm J out of engage= ment with the shoulder L on the belt-shifter rod M. The latter being under tension,drawing in direction of the arrow, (see Fig. 3,) it is apparent that it will move to shift the tentering-machine drive-belt (not shown) or disconnect the source of power of whatsoever nature.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination in a tentering-machine, stop-motion-operating means resting upon the cloth, a lever located under the cloth with its free end directly under the said operating means resting upon the cloth, and means Worked by the said lever under the cloth operating to stop the tentering-machine by disconnecting its source of power, substantially as described.

2. In combination in a tentering-machine, a pivoted and weighted arm resting upon the cloth, a lever arranged under the cloth with its free end yieldingly held up directly under the free end of the said weighted arm, a rotating cam, a shipper -rod, a rocking arm adapted to hold the said shipper-rod against operative movement, connecting means between the said cam and the rocking arm and means extending from the lever under the cloth adapted in operation, with the other features specified, to free the said shipper-rod, whereby the driving power is disconnected with effect to arrest motion of the tenteringmachine, substantially as described.

3. In a tentering-machine and in combination, automatically acting power shifting means consisting of a continuously-rotating cam device, a yielding shoe held in contact with the said cam device, a belt-shifter rod, a yielding rock-arm adapted to hold said beltshifter rod against movement, a pivoted trigger on the said rock-arm, adapted to be drawn under'the said yielding shoe as specified, and connecting means extending from the said pivoted trigger to operating devices on the tentering-machine whereby, when the cloth becomes detached from the tenter-chain, the saidrock-arm is moved out of contact with the power-shifter, substantially as described.

JOHN L. DABBS.

\Vitnesses:

OHAs. WV. PEIROE, CHRIS J. BROWN.

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