US43777A - kendrick - Google Patents

Description

NITED STATES OFFICE.

JOHN KENDRICK AND JOSEPH H. KENDRICK, OF PROVIDENCE, RHODE ISLAND.

MACHINE FOR DRESSING WEAVERS HARNESS.

Specification of Letters Patent No. 43,777, dated August 9, 1864.

To all whom t may concern Be it known that we, JOHN KENDRICK and JOSEPH H. KENDRiCK, both of the` city and county of Providence, in the State of Rhode "Island, have invented certain .new and useful Improvements m Machines for Dressing a plane, through the line A. B. Fig. 4, is

a section in a plane through the line C, D.

Before a weavers harness is fit to be introduced into a power loom it is necessary that all the fibers upon the outside of the twine of which it is made should be laid uniformly in one direction so that the surface will be perfectly smooth and not injure the warp of the cloth.

To accomplish this more perfectly than it has heretofore been done by hand labor is the object of our improvement.

The machine which is represented in the drawings consists of the following principal parts. First, a carriage upon which the harness is placed mounted on a frame on which it is strained so that the twines will be taut, and which carriage has a reciprocating movement upon a suitable track, imparted to it at intermittent periods, and second, one or more pairs of brushes made to revolve in the same direction between which the harness carriage is made to travel, and which brushes are made to alternately approach toward and recede from each other during determined periods, so that while the harness is traveling upon the carriage in one direction the brushes will be clear of it, but on the return movement they will close upon it and perform their oflice.

The mechanism in which this mode of operation is embraced is as'follows:

A, A, is a strong rectangular frame upon which the several parts are mounted and should be of sufficient length to accommodate the largest size of harness. Motion is communicated from the pulley shaft B through the toothed wheels C, and D, to the cam shaft D', (Fig. l.) AThis shaft carries two cams E and F, the former of which controls the movement of the brushes G, G', (Fig. 2) in their action upon the harness to be dressed and the latter governsthe movement of the harness carriage.

The harness carriage consists of a rectangular frame H, removable at pleasure (shown broken olf in Fig. 1 and an end view in Figs. 3 and 4) provided at convenient distances with hooks a, a, against which the shafts of the harness are placed. The carriage should be constructed in two parts one part being provided with slots and secured to the other by clamp screws b, (Fig. l) for the purpose of adjusting the same to harnesses of differentl widths and the portion which is not slotted should also be provided with a bar extending along the side upon Iwhich are placed holding hooks and which bar is held in place by a spring c, so that after the shafts ofthe harness are hooked to the carriage the tension of the spring will cause the twines to be strained taut.

Upon the under side o-f the carriage is placed a projecting piece d (Fig. 4) provided with a notch which receives a pin d secured to the arm I, near the upper end. To this arm which is pivoted at e to a cross bar of the frame a vibrating motion is imparted by th-e cam F acting through the bell crank J the upper arm of which is connected with the arm I by means of the link K and whichl by means o-f a clamp f, as shown can be adjusted to different positions upon the arm I, to vary the extent of its arc of vibration. It is obvious that as the sha-ft D revolves the harness carriage will be made to travel forward and backward upon a track made for the purpose, with the vibration of the arm I, and that its periods of rest and motion can always be fixed and determined by the shape of the actuating cam F.

G, G, are two cylindrical brushes revolving in the same direction (and additional pairs can be used if desired) whichl extend across the machine one being located directly above the other, and are fitted to turn in bearings upon each end which rest upon the levers L, L, (Fig. 2.) These levers whose fulcra are respectively at g and g", will alternately approach and recede from each other as the rocker arm M on the shaft M', with which the end of each lever, as shown in Fig. 2, is connected, is vibrated and consequently the brushes G, Gr, will have a position relating'to each other dependent upon the position of the rocker arm. The rocker shaft M is worked for this purpose by' the armN, (Fig. 3) which is o-perated by the cam E upon the shaft D', as shown, the action of which relatively to the movement of the harness carriage above described it is clear can be readily governed by the shape of the cam E, and itsposition i upon its shaft.

The operation of the machine is as follows: The harness to be dressed is placed upon the carriage; the forward movement of the lever I carries the carriage with the harness between theV brushes which are too :fa-r apart to act upon it. When the carriage l has reached thel extent of its movement and is about toreturn the brushes close upon the harness and as the carriage returns lays the fibers of the twines evenly and uniformly in one direction. Y

7e do not limit ourselves to the precise construction of the several parts as described, but we mean to claim all mere formal variations of mechanism operating by equivalent means.

What we do claim as of ourinvention and desire to secure byy Letters Patent isl. The method substantially as specied of dressing weavers harnesses by the combination of a reciprocating carriage H upon which the Vharness is strained, with brushes G, Gr, or their equivalents revolving in the same direction, between which the harness W. B. ViNcnNT,

B. F. THURSTON.

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