US2859778A

US2859778A - Carpet loom attachment

Info

Publication number: US2859778A
Application number: US680995A
Authority: US
Inventors: Thomas T Janney; George Y Jean; Robert Eichenberg; James L Wallace
Original assignee: Lees & Sons Co James
Current assignee: JAMES LEES AND SOUS Co; Lees & Sons Co James
Priority date: 1957-08-29
Filing date: 1957-08-29
Publication date: 1958-11-11
Anticipated expiration: 1975-11-11

Description

NOV. 11, T. T JANNEY ETAL I CARPET LOOM ATTACHMENT 2 Sheets-Sheef. 1

Filed Aug. 29, 1957 mvelvram: THOMAS 7'. JANNE Y GEORGE Y. JEAN 1958 'T'. 'r. JANNEY EIAL CARPET LOOM ATTACHMENT 2 Sheets-Sheet 2 Filed Aug. 29, 1957 INVENTORJ'. THOMAS T. JANNEY G ORGE Y. JEAN BY ATTK CARPET ,LOOM ATTACHMENT Thomas T. Janney, Lafayette Hills, Pa., and George Y. Jean, Clearwater, Fla., assignors to James Lees and 'Sons Company, Bridgeport, Pa., a corporation of Pennsylvania Application August 29, 1957, Serial No. 680,995

6 Claims. 01.139-39 This invention pertains to pile fabric looms and more particularly to an improved head motion for a velvet carpet loom by means of which novel design effects can be achieved without the use of a jacquard.

The ordinary dobby or head motion of the type suitable for use on a velvet loom employs two positions in which selected harnesses are raised and lowered between a top position and a bottom position in accordance with a predetermined pattern or design. In weaving a multishot velvet fabric in which it is not desired to have the pile yarn extend through to the back, this conventional head motion cannot be used, because whenever a harness is not selected, it will be dropped to the bottom position, thus weaving the face yarn through to the back. The present invention provides a simple and inexpensive attachment for a multi-frame head motion controlling as many as six pile harnesses which will not permit the pile yarn to weave through to the back and which may also be used to carry selected pile yarns over any desired number of pile wires.

A primary object of the invention, therefore, is to provide an attachment for a velvet loom having a head motion which controls the position of the pile harnesses when the bottom shot is being inserted.

A further object of the invention is to provide an oscillating lifter or limit stop for the pile harnesses which alternately permits the harneses to drop to a bottom position for insertion of the top shot and which holds up all non-selected harness to a mid position to permit the insertion of a bottom shot below all the pile yarns.

Further objects will be apparent from the specification and drawings in which:

Fig. 1 is a schematic view of a velvet loom showing the operation of the present invention when the top shot is inserted,

Fig. 2 is a view of the apparatus of Fig. 1 showing the position of the mechanism when the bottom shot and the wire are being inserted. Both Figs. 1 and 2 show the head motion turned approximately 90 from the normal arrangement on the loom, and

Fig. 3 is a weave diagram of a typical fabric produced by means of the apparatus shown in Figs. 1 and 2.

The invention comprises essentially the provision of a pair of cam operated lifters positioned at each side of the loom and timed to hold up all of the harnesses when the bottom shot and the wire is being inserted.

A velvet loom constructed in accordance with the present invention comprises an upper loom frame 5 on which there are pivoted a plurality of oscillating jacks 6 and 7 (one for each of the

harnesses

8, 9, 10, 11, 12, and 13). Oscillation of the

jacks

6 and 7 etc. controls the relative position of the harnesses 8-13 through cables 14 and 15 connected to the notched upper ends of the jacks and running over

pulleys

16 and 17 mounted on loom frame 5.

The loom is also equipped with the conventional reed 20 which oscillates to beat up a shot of filling yarn carpied by shuttle 21 and the pile wire 22 against the fell 23 United States Patent 0 2,859,778 Patented Nov. 11, 1958 of the fabric F. Each harness contains the usual number of

heddles

24, 24 having

eyes

25, 25 through which the pile yarns P are threaded. For purpose of clarity, both the chain warps and stuffer warps have been omitted from the Figures 1 and 2, and it will be understood that these warps are controlled through separate heddles which reciprocate in timed relation from a raised to a bottom position to form the complete warp shed.

In the position of the head motion shown in Fig. 1,

harneses

8, 10, 11, 12, and 13 are lowered to a bottom shed position by the clockwise pivoting of the jacks (represented by 6) to carry the pile yarns P threaded through the heddles of

harnesses

8, 10, 11, 12, and 13 below a top shot being inserted by shuttle 21. Harness 9 is held in an upper position by jack 7 under control of the pattern motion to prevent the pile yarns carried by the heddles of harness 9 from weaving under the top shot. On the next cycle typified by the contraction of reed 20 shown in Fig. 2 a bottom shot will be inserted and a pile wire 22 simultaneously inserted into the shed.

However, to prevent the pile from weaving through to the back, it is necessary to hold all of the pile yarns above the bottom shot either in a mid position between the bottom shot and wire 22 or in a fully raised position above wire 22. The jacks 7 which control the pile weaving over the wires are shown as holding

harnesses

9 and 11 in a raised position. In Fig. 1 jack 7 is shown as raising only harness 9 when the top shot is being inserted. All

other pile yarns are, therefore, in the lower position, but the yarns carried by harness 9 will carry a float 30 over two or more successive pile wires (Fig. 3). The piles carried by the remainder of the harnesses are held in the mid position by means of a pair of

saddles

31, 31 at each side of the loom which are elevated by means of a rocker arm 32 journaled on girt 33 and controlled by an eccentric 34 on bottom shaft 35. A roller 36 on rocker arm 32 contacts the periphery of eccentric 34 to actuate the rocker arm. The saddles 31 which act as limit stops for the harnesses slidably engage a slotted guide element 37 and it will be understood that only one of the pair of saddles and rocker arms are illustrated and that there is duplicate construction at each side of the loom so that the bottom of the harnesses 8-13 are engaged at each end thereof.

Referring to Fig. 3, the chain or binder warps 40 are shown interwoven with the

top shots

41, 41 and the

bottom shots

42, 42. By holding one or more of the jacks 7 in the retracted position, it is possible to carry selected yarn ends over any desired number of wires to form high floats. Pile yarns 30 illustrate a high float formed over three successive wires. Other pile yarns shown at 43 are carried up to work over selected wires which may be every wire or they may run dead below the top shots 41 for as long as may be desired. In Fig. 3 both the

yarns

30 and 43 selectively work up over every third wire and run dead under the two intermediate top shots 41.

With the judicious selection of different types of yarns and the threading of the harnesses, it is possible to achieve very unusual effects on a velvet loom without the complicated slower and more expensive jacquard method of individual yarn selection.

Having thus described our invention, we claim:

1. In a velvet pile fabric loom the improvement which comprises a head motion for selectively raising and lowering a plurality of pile yarn harnesses from an upper to a lower position, means including a limit stop movable from a lower position to an elevated position and operating in timed relation with the head motion whereby harnesses are lowered to a bottom shed position when a top shot is inserted into the shed and retained in a mid shed position when the bottom shot is inserted into the shed.

ticalf-guide memb'erspfor'the'saddle.

' 2. An attachment for a velyet loom havingamultiharnesshea d motion coinprising a saddle positioned to engage the bottom of the harnesses, means for elevating the s addle to .hold at least some @of the har nessesin a m dpos'itioriiduring-Ta selected'portion oi the cycle, and

mean; for lowering the ls'addl'e-to. permit the harnesses to drop to a lowershed position duringlano ther; shecl posi- 9 tion of the cycle.

'3. n attachment for a carpet loomhaving a-multiharness head motion comprising atleast onesaddle vertically; reciprocable .to elevate the pile harnesses during one portion of afweaving cycle, rocker. armgconnected to said cycle, and means operatively driven ;.by,the botto n: sh aft of the loorn for pivoting said rockerarm to .7 cyclically maintain, theharnessesin an-elevated position.

4; Apparatus in accordance. with claim 3ihavin'g ver- 1 5. 'Apparatus'inxaccordan'ce withlclaim3tin which the nieans drivingly connected to the bottom shaft comprises an eccentric.

harnesses.

'References Cited in the file 'of this patent UNITED STATES PATENTS 2,477,249 Harding July 26, 1949 2,708,457 Gebert May 17, 1955 2,715,921 Smiley Aug. 23, 1955 2,754,850 Hoeselbarth July 17, 1956 2,774,390 Hoeselbarth Dec. 18, 1956