US1580948A - Loom-treadle guide - Google Patents

Description

' April 13, 1926.

J. B.'BELL Filed Dec; 19. 1925 ATTORNEY Patented Apr. 13, 1926 UNIT En srrA PATENT G ms,

JAMES B. BELL, OF PEIiZER, SOUTH CAROLINA, ASSIGNOR TO DRAPER CORPORATION i OF HOIPIE'IDALIEI, MASSACHUSETTS, A CORPORATION OF MAINE.

LOOM'TREADLE' GUIDE.

Applicationfiled. December. 19, 1925. SerialNc'. 76,390.

To all whom it may concern.

Be it known that I, J AMES B. Berna cit1- zen of the United States, residing in Pelzer,

in the county of Anderson and State of South Carolina, have invented an Improvement in. Loom-Treadle Guides, of which the following descriptiomin connection-With the accompanying, drawings, is a: specification, like characters on. the drawings representing likeaparts. v

This invention relates to loom treadle guides for directing the movement of the treadles in a cam operated shedding mechanism. y

In that type of shedding mechanism wherein the heddle frames are actuated by cam operated treadles, it is now the common practice to mount .the treadles at the rear of the loom and connect the free ends of the treadles to the heddles. and ithas also been proposed to guide the free ends of the treadles. in their shed forming movements.

Ina shedding mechanism of the cam and treadle operated type, rolls have beenmounted upon the treadlesfor engagement by treadle operating cams, and in such cases the rolls,.or cams, or'both, are liable to be come worn during use, with the result. that the treadles themselves ,are subject to a twisting; action abouttheir longitudinal axes to such an extent that at times the treadles may be broken. This is especially observable in cases where the treadles are fulcrumed at the rear of the loom by open.

fulcrum bearings, and one of the objects of the present invention is to provide means for distributing the wear between the cams and rolls and at the open fulcrum bearings, with the result that the Wear at these points will be uniform throughout and consequently obviate any twisting or torsional action upon the treadles about their longitudinal axes during weaving.

More specifically stated, the present invention contemplates the provision of a treadle guide between the treadle actuating cams and the harness connections, which may be located closely adjacent the harness connections, and comprising in its construction a guide supporting bar secured to the loom frame and extending above the treadles, and provided with a downwardly extending slotted guide frame through which the treadles project.

The invention and new combination of parts V1111 best be made clear from the follownig drawings of one good form thereof. 7

In the drawmgsz.

Fig. 1' is aperspectiveview showingacam.

and treadlev actuated shedding mechanism having; the present invention associated;

therewith V Fig: 2 is an enlarged: detail view of the treadle guide; and

Fig.3 is a side elevation partly in section:

showing the mounting. of the treadles by open fulcrum bearings.

Theloomframe may be of usual construc tion. and have extendingyupwardlv therefromthearch supportsl, between which ex.- tends the arch; 2, from which. the. heddle frames may be suspended.

instance, the arch 2is providedwith the bearings 3 in whichv is supported the rocker 4 having the upper harness connections 5 and 6. secured thereto. 'Ilheharness connec tions- 5 and 6 are connected: respectively with the upper bars 7 dle frames 9- and 10,.and connected to the lower bar of each heddle frame isa. spacer rod 11 and'1 2; The: construction. so: far de-. scribed: may be of any, usual type-and is.

herein: shown as constituting one? good prac. tical form of heddles and harness connections that may be employed with the present invention.

Extending between the front and rear girths 13 and 1 1 are the beams 15 and 16, and to the rear one of the girths (14 as shown) are secured bearings or lugs 17 supporting a stud or dead shaft 18 on which the treadles 19 are mounted for rocking movement, As shown, each of the treadles 19 has an open fulcrum bearing 20 which hooks over or rests upon the stud or dead shaft 18, and between the fulcrum bearings and the ends of the treadles are the treadle rolls 21 which are engaged by the treadle actuating cams 22 mounted upon the under or cam shaft'23, the construction being such that as the under or cam shaft23 is rotated, the treadles will have imparted thereto an up and down movement. The free end portion of each treadle is provided with a series of'teeth 24 between which and the spacer rods 11 and 12 extend the harness connections or straps 25.

description and the accompanying perspective In. the present:

and 8 ofthe: two hed- I The particular feature of the present invention consists of a treadle guide more particularly shown in Fig. 2, which comprises a rod supporting bar 26 having foot portions 27 at each end adapted to be secured to the fore and aft extending beams 15 and 16.

The treadle guide supporting bar; 26 is curved upwardly, as indicated in Figs. 1- and 2, so that it. may be located above. the treadles and extend over the tops thereof between the treadle actuating cams and harness con- DQCtIODS."

The arched treadle guide supporting bars 26 has extendingfrom itsconcave surface the downwardly projecting guide frame 28, provided with openings or slots 29 through which the treadles 19 extend. In order that the treadles 19 may be properly guided in their up and down movements in the slots 29 and prevent unequal wear ofthe open fulcrum bearings and the cams or rolls 22 :and 21 respectively, the slots 29 in the guide frame 28 are made to closely embrace the side portions of the treadles adjacent the harness connections 25 and between such connections and thetreadle actuating cams.

I Since the treadle guide supporting bar 26 is to extend above the tops of the treadles between the treadle actuating cams and harness connections, it is curved upwardly'or arched to provide for the desired amplitude of movement of the free end portionsof the treadles. It' is found in practice thata treadle guide to properly function asherein I described, should not only be secured to the loom frame, but the supporting bar itself -should be disposed above the treadles with the guide frame extending downwardly therefrom, and to effect rigidity of the treadle guide the arched supporting bar 26 and the guide frame 28 may be formed as a supportingibar' to the frames 15 and16'. By loosening thenuts 32 the. treadle guide maybe adjusted towards or from the harness connections or towards or from the treadle actuating cams, to most efiectively function in preventing torque or twisting movement of the treadle and unequal wear between the treadle actuating cams and rolls.

hat is claimed is: 1. A treadle guide for looms, comprising an upwardly arched guide supporting bar having end feet provided with means for securing the supporting bar in different 'po' sitions tothe loom frame, and a treadle guide frame extending downwardly from the arched supporting bar and having guide openings for the treadles.

A treadle-guide forlooms, comprising an upwardly arched guide supportlng bar having-end feet for'secu'ring the supporting bar to the loom frame, and a guide frame extending from the concaved portion of the supporting bar and having guide openings.

In testimony whereof, I have signed my name to this specification. J

7 JAMES 'B. BELL.

Images