US568349A - Tenter - Google Patents

Description

(No-Mod l.)

R. M. HUNTER. TENTERING MAGHINE.

Patented Sept. 29, 1896.

I j/oor f/aar- Righf chain.

I )(nven for UNITED STATES PATENT OFFICE.

RUDOLPH M. HUNTER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE H- IV BUTTERWVORTH & SONS COMPANY, OF PENNSYLVANIA.

TENTER-ING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 568,349, dated S p r 29, 1896 Applioation filed February 12, 1896. Serial No. 578,989. (No model.)

To aZZ whom it may concern:

Be it known that I, RUDOLPH M. HUNTER, of the city and county of Philadelphia and State of Pennsylvania, have invented an Improvement in Tentering-Machines, of which the following is a specification.

My invention has reference to centeringmachines for treating textile fabrics; and it consists of certain improvements which are fully set forth in the following specification and shown in the accompanying drawings, which form a part thereof.

Heretofore tentering-machines have been made with two endless conveyers of pins or clamps, combined with mechanism for reciprocating said conveyers longitudinally bodily simultaneously in opposite'directions, and at the same time moving them toward or from each other while they are being driven, so as to stretch the fabric on the diagonal while feeding it forward. Such class of machines is clearly disclosed, for example, in Patent No. 237,225, dated February 1, 1881, to O. P. lVood. It has been customary, as is clearly disclosed in said patent, to connect the driving-shaft and both of the pinions which rotate the large sprocket-wheels of the endless conveyers or clamps with a vertical operat ing-shaft by means of bevel-gears, the vertical shaft being pivoted so that its vertical axis passes through the axis of oscillation of the driving-shaft and pinions. The objection to this construction has been that while the total forward movements of the chains or clamps 011 each side are the same the movements of said chains are relatively irregular,

that they operate upon each side of the fabric in exactly the same manner and to the same extent.

The object of my inven- I My invention will be better understood by reference to the accompanying drawings, in which Figure l is a longitudinal sectional elevation through one end of a tentering-machine embodying my improvements. Fig. 2 is a transverse section of same on line w 00, and Fig. 3 is a diagram illustrating the uniformity of the movements of the two chains.

A A are longitudinal side frames having chain-guides O formed thereon in any suitable manner. These longitudinal frames are supported upon transverse arms B by pivots I), and said transverse arms are pivoted upon pedestals B in any of the well-known manners, so that when one of said frames advances the other recedes, and vice versa.

F is a large sprocket-wheel, about which the endless conveyer or chain B works, the

said chain being guided in guides O and fed by means of the sprocket-wheel F. Each of the longitudinal frames is provided with a similar sprocket-wheel and chain in the wellknown manner. In the return the chain may 7 5 pass through grooved guides 0, arranged close to the floor and moving with frames A. The chains D are provided with clamps or pins, as is customary.

Thesprocket-wheels F are driven by means of pinions M M, which are respectively supported upon shafts K L and made to rotate positively therewith by means of feathers or splines m,while being permitted to slide longitudinally thereon. The said shafts K L are 8 5 journaled in bearings J, so as to be held in line and oscillated as a unit, and the outer ends of the respective shafts are also 3' ournaled in sliding blocks 0, adapted to move upon the guiding-pedestals P, though this latter construction is not absolutely necessary. The bearings J are formed in the frame I, which is journaled upon a central pedestal H, securely bolted to the floor. The said frame I is oscillated upon the pedestal H by means of 5 a crank Q, which may be driven in any suitable manner. The pinions lWI are held in substantially vertical alinement with the longitudinal frames by means of inclosing boxes N, which are pivoted upon vertical pivots n I00 to the longitudinal frames and are the direct means of reciprocating them. It will be evident that if the frame I be oscillated the shafts K L also oscillate therewith and through the media of the boxes N cause the longitudinal frames A A to be rcciprocated back and forth. During this reciprocation the frames A are caused to move toward and from each other, as is well known, by means of the transverse pivot-frames B.

In the vertical pedestal II, I arrange two shafts R and S, journaled concentrically to the pivot-bearing of frame I, and at the upper end of shaft S, I secure a bevel-gear S, which meshes with a similar bevel-gear S upon the shaft L. Upon the upper end of the outer or tubular shaft R, I secure a bevel-gear R, which meshes with a similar bevel-gear R upon the shaft K. It is desirable that the relation between the bevel-gears S and S shall correspond to the relation between the bevel-gears R and R The lower ends of the shafts R and S are respectively provided with bevelgears T and T, arranged to face each other and mechanically connected by a driving bevel-gear T upon the power-shaft t. It will now be observed that by rotating the shaft t the gears T and T will rotate the shafts R and S in opposite directions, and this will cause the shafts K and L to rot-ate in the same direction and at the same speeds.

It is of course evident that if the gears T and T are of different sizes or driven at (lifferent rates of speed by the power devices the relative proportions between the gears S and H and R R will be modified, the essential point being to so arrange the gears that the separate shafts K and L, which drive the pinions M M, will always rotate at the same rates of speed or numbers of rotations and in the same directions.

Geared with the bevel-gears T and T is a bevel-gear IV, which, by means of the shaft (Z, drives the vertical shaft q of the crank Q by means of the power or miter gears V. This enables all of the parts to be driven from the same powcrshaft t. It will further be observed that by this construction great simplicity is secured and no expensive machinework is required.

It will be seen that as the shafts R and S, together with their gears R and S, constantly rotate in one direction,and with a uniform speed, the oscillation of the frame I will so move the shafts K L that when the frames A A move backward the speed of the chains is greater than when they moved forward, but this change of speed is exactly the same for each one of the two chains, and consequently the effect or action of said chains or conveyers upon both edges of the fabric is exactly the same. In the construction of the machine as heretofore made, and an example of which is shown in the patent before referred to as illustrating the state of the art, the chains moved more rapidly for the backward movement of one of the longitudinal frames than for the backward movement of the other longitudinal frame, and inversely the said chains of the first-mentioned longitudinal frame moved more slowly in the forward movement thereof than the corresponding chain of the other longitudinal frame in its forward movement. struction these irregularities are entirely eliminated,and the operation upon the chains or conveyers is identically the same with both longitudinal frames both in their backward and in their forward movements, and hence the action upon the fabric is uniform upon both edges and to the same extent.

The diagram, Fig. 3, illustrates the action of the movement of the conveying-chains of my improved machine, assuming the line (1 3 to be in line with corresponding clamps of the two chains. The first position is indicated at 1 l, the second position would be indicated at 2 2, the third at 3 3, and so 011. It will be perceived that the advances between the terminals of any reciprocation, such as between 1 and 3, 3 and 5, 2 and 4, &c., will be uniform and equal, and hence is exactly the same both for the left and right chains.

While I prefer the construction shown, I do not con fine myself to the minor details thereof, as they may be modified without departing from my invention.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. I11 a tentering-machine, the combination of two longitudinal reciprocating frames provided with conveyer or chain guides, means for reciprocating the frames, an endless chain or conveyer for the fabric carried by each of said frames, a driving sprocket or chain wheel for and moving with each of the lo11- gitudinal frames, pinions for driving the respective sprocket or chain wheels, two shafts for driving said pinions independently, means for rotating the shafts, a pedestal forming a vertical axis of oscillation for said pinionshafts, vertical concentric shafts extending through the pedestal, bevel-gears R S respectively secured to the concentric shafts, and gears It S 011 opposite sides of the con.- ter of the pedestal and concentric shafts re spectively connected with the pinion-shafts.

In a tentering-machine, the combination of two longitudinal reciprocating frames provided with conveyor or chain guides, an end- In myim proved conless chain or conveyer for the fabric carried by each'of said frames, a driving sprocket or chain wheel for and moving with each of the longitudinal frames, pinions for driving the respective sprocket or chain wl1eels,two shafts for driving said pinions independently, means for oscillating said shafts upon a vertical axis intermediate of the pinions and reciproeatin g the longitudinal frames, a power-shaft, and connecting-gearing between said power-shaft and the two pinion-shafts consisting of two vertical concentric shafts respectively connected at their top ends with the respective pinion-shafts by bevel-gears on opposite sides of said concentric shafts, and at the bottom ends by gears with the power-shaft.

" pivoted frame shall reciprocate the longitudinal frames and their chains or conveyers,

a power-shaft, a crank operated by the powershaft for oscillating the pivoted frame, and independent gearing connectingthe powershaft With the two independent pinion-shafts upon opposite sides of the pedestal and axis of'oscillation of said pinion-shafts whereby they are caused to rotate at the same variable speeds.

In testimony of Which invention I have hereunto set my hand.

R. M. HUNTER.

Witnesses:

ERNEST HOWARD HUNTER, WM. L. EvAns.

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