US1719911A - Leno jumper attachment - Google Patents

Description

y 1929. v E. J. TETREAUL'i' 1,719,911

LENO JUMPER ATTACHMENT Filed y 1928 2 Sheets-Sheet l aha/"Mp Patented July 9, 1929. p

UITED STAIES Application filed May 25,

The invention relates to attachments for looms, constructed to enable the weaving o'l' cloth known as leno, for without such attachment or equipment, leno weaving is imposs1- blc.

it is the object of my invention to provide a rather simple and inexpensive, yet an etlioient, smoothly operating attaclnnent, by the use of which almost any desired number oil? harness actuators may be operated.

A further object is to provide a construction which is applicable to any make of loom and will operate to equal :ulvantage thereon.

lVith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawings.

l 9;. 1 is a side elevation showing the applir tion of the invention lfii r. E2 is a somewhat enlarged side elevation showing; the operating levels for the harness actuators, swung to a dilterent position.

hi 3 is an enlargedside elevation similar to Fig. 2 but showing a dillerent position of parts. i

v Fig. .4 is an cndclcvation of a portion of a loom equ i pped with the invention, parts being broken away and in section.

Fig. 5 is a view similar to Fig. t but showing; a somewhat different relation. Off parts.

The general form of construction herein disclosed, has proven in actual service, to be cilicient and desirable from all standpoints. Hence, it may be considered as preferred, with the understanding that within the scope of the invention as claimed, variations may he made. i

The nunilerals 6 denote two, spaced, vertical bars whose lower ends may be secured by bolts 7 against the inner side of a dobby head frame 8, or against theouter side thereof, the first arrangement being shown in most views while Fig; 5 discloses the latter. In some looms, it is more advantageous to secure the bars 6 to the inner sideof the -frame 8, while in others it is practically essential that they be secured to the outer side.

The bars 6 are provided with upper and lower bearings 910, in which upper and lower horizontal. shafts 1.112 are mounted.

Two parallel vertical levers 13 are fulcrumed between their ends upon the upper shaft 11 and may be disposed either at the inner ends of the bearings 9 or at the outer ends thereof, as will be seen by comparing ELMER J". TE'IREAULT, OF NEW BEDEE'ORD, MASSACHUSETTS.

LENQ JUMPER ATTACHMENT.

1928. Serial No. 280,525.

Figs. 4 and 5. In either instance appropriate collars 14lmay be seen red on theshalt to hold the latter against endwise movement and to hold the levers 13:3 against sliding along said shaft. i

The lower ends of the lovers 1.3 are provided with straight traclr portions 15 contac ing with rollers 16 carried by two arms 17 which are secured to the shalt 12 by set screws or the like, said arms being); disposed either at the inner ends of the bearings 10 as in Fig.1. 4 or at the outer ends thereof as seen in Fig. I), according to the manner in which the bars 6 and the levers 1.3 must be positioned.

A crank 18 secured to one end oil the shaft 12 and is connecti-wl by an appro nriate pitman l9 torn'ied oi? pivotally coimectod sections, with a wrist pin 20 on a fly-wheel. 2i, the latter being socurmlupon the top loom shaft i At the upper end of the lovers 18. two brackets illare provided. each boino' of tinverted L-shape in the preferred construction. The vertical portion 24- 01 those ln'aclnrts are secured by bolts 25 to the upper ends oi? the levers 13, either against their outer sides as in 1 lor against their inner sides as seen in F's. 5, according to the distance which it 1s i'iecessa ry to space said levers apart. \Vhon the levers 13 must be rather close together as in Fig. 4, the horir iontal portions 26 oi. the

brackets 23 project outwariflly thcreifroi'n as seen in. this view, but when said levers must be spaced apart a greater distance as in Fig. 5, the bracket portions 26 project inwardly:

A horizontally elongated plate or bar 27 extends between the upper ends ol': the levers 13 and is disposed in substantially a vertical plane, the ends of this member which will hereinafter be termed a. bar, being provided with :lieet 28 which may be secured by bolts 29 to the bracket portions 26 whether the latter project outwardly or inwardly from the lovers 13. This bar 27 is provided with a plru'ality 01" small openings 30 tl'irougrh which to pass practically any desired nun'iber ()IE harness actuators which are preferably in the form 0']? wire rods 31, Collars 32 may be scmired upon these rods in abutting "contactwith the outer side oi the bar 27 and these collars may be locked to the rods alter any de sired adjustments have been made. i

As the loom is operated, pi tlnan 19 is reciprocated and through the medium oi. the crank 18, it oscillates the rock shaft 12. The arm carried rollers 17 of this rock shaft co-act lllfi with thetrack portions 15 of the levers 13, in smoothly oscillating the levers 13, without any jerky motion whatever. Oscillation of these levers causes inward and outward movement of the bar 27 to operate the harness actuators 31 in proper rhythm with other parts of theloom.

Not only is the attachment simple and inexpensive, but it may be readily applied to any make of loom and will be eflicient and durable whether only a small number or a large number of the actuators 31 are to be operated.

. The present attachment is part of necessary equlpment to enable any loom to weave the so-called leno cloth. The attachment constitutes half ot the action which works the tachment commonly called the jumper motion of this action, operates or controls the bottom shed or cross yarn. The attachment does not interfere with the forming of the shed, as it does not control the weaving of cloth or background of the pattern of weave in cloth, only acting when leno weave desired. To weave leno cloth, there must be a certain number of plain weave harnesses and a certain numher of leno or jumper weave harnesses. The attachment comes into play to weave the spots, flowers or the like in any pattern when the pattern chain brings into the play the co-ealled doup harnesses. The attachment controls the bottom shed of doup harnesses which is the slack or cross yarn, while the Philadelphia doupor heddl'e controls the top shed of same, when the loom is called into play to weave the leno eti'ect in cloth. I

Iclaim:

1'. A loom attachment comprising a pair of spaced parallel oscillatory levers, means for mounting and means for oscillating said levers, and a bar connecting the upper ends of said levers, said bar having means for connecting a plurality of spaced harness actuators therewith. v

' 2. A loom attachment comprising a pair of parallel oscillatory levers, means for mounting and mea'n's for oscillating said levers, a pair of brackets each having a vertical portion and a horizontal portion, means securing the vertical bracket portions to the upper endsof said levers, a bar extending between said brackets, and means securing said bar to said horizontal bracket portions, said bar having means for connecting a plurality of spaced harness actuators therewith.

3. A loom attachment comprising a pair of parallel oscillatory levers, means for mounting said levers in either of two spaced relations, a bar extending between the upper ends of said levers, means for securing said bar to said levers when the latter are in either ot said spaced relations, and means For osci llating said levers, said bar having means for connecting a plurality of spaced harness actuators therewith.

l. A loom attachment comprising a pair of parallel oscillatory levers, means for mounting said levers in either of two spaced relations, a bar extending between the upper ends of said levers, inverted L-shaped brackets whose vertical portions are applicable nga inst either the outer or the inner sides of said levers to cause the horizontal portions ol the brackets to project either outwardly or inwardly from the levers, means tor securing said vertical bracket portions to said levers, means for securing the ends of said bar to said horizontal bracket portions, and means lor oscillating said levers, said bar having means for connecting a plurality of spaced harness actuators therewith.

5. A-loom attachment comprising a pair of parallel vertical levers, means connecting the upper ends 01? said levers and adapted tor connection with a plurality of harness actnators, means mounting said levers between their ends, a rock shaft carried by said mounting means below the fulcrum axis of said lev'ers, means for oscillating said rock shaft, and arms on said rock shaft having rollers contacting with the lower ends of said levers for oscillating the latter.

6. A loom attachment connprising two vertical bars and means for securing their lower ends to a dobby head, said bars being providcd with upper and lower bearings, upper and lower horizontal shafts mounted in said bearings, a pair of vertical levers fulcrnnied between their ends on said upper shaft, arms on the lower shaft having rollers in contact .with the lower ends 01 said levers tor oscillating the latter, a crank on said lower sha lit and a pitman connected with said crank 'lor oscillating said lower shaft, and a. bar extending between and connected with the upper ends of said levers, said bar having means for connecting a plurality of harness actuators therewith. v

y In testimony whereof I have hereunto atlix ed my signature.

ELMER J. TETREAULT.

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