US1496098A

US1496098A - Loom attachment for stripping bobbins

Info

Publication number: US1496098A
Application number: US624002A
Authority: US
Inventors: Newell Robert
Original assignee: FARR ALPACA Co
Current assignee: FARR ALPACA Co
Priority date: 1923-03-09
Filing date: 1923-03-09
Publication date: 1924-06-03
Anticipated expiration: 1941-06-03

Description

June 3 E924. 1,496,098

R. NEWELL LOOM ATTACHMENT FOR STRIPPING BOBBINS Filed March 9, 1923 INVENTOR ATTORNEYS TATES 1,496,998 ATENT err-ion.

ROBERT NEWELL, 0F HOLYOKE, MASSACH'USETTS, ASSIGNOE 'ro FARR ALPACA. ($0M- ?ANY, OF HOLYOKE, a CHUSETTE, A. CORPORATION Q'F SSACHUSETTS.

LOOK ATTACHIT FQR STRIPPIHG BQBBINS.

Application filed March 9, 1923. $eria1 No. 624,002.

To all whom it may concern: Be it known that I, ROBERT NEWELL, citizen of the United States, residing at Holyke, in the county of Hampden and State of assachusetts, have invented new and useful Improvements in Loom Attachments for Stripping Bobbins, of which the following is a s ecification.

his invention relates to the art of stripping yarn from bobbins or the like and more particularly to bobbin-stri ping mechanism which is adapted for app ication as an attachment to an automatic weft-replenishing loom and which functions during the continuance of the weaving operation to unwind ghe remnants of yarn from the ejected bob- The object of the invention is to provide certain new and useful improvements in the construction and mode of operation of bob-- bin-stripping mechanisms of the above mentioned character tending to render the mechanism more efficient and reliable in opera,

tion.

To this end the invention consists in the features of construction and the combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be apparent to those skilled in the art.

The preferred embodiment of the invention is shown in the accompanying drawings, in which Fig. 1 is a vertical sectional view of the improved bobbin strip ing mechanism, together with so much 0 a weft replenishing loom as is necessary to illustrate the application of said mechanism thereto; and

Figs. 2 and 3 are detail sectional views taken along the lines 2-2 and 3-3, respectively of Fig. 1.

Referring to the drawings, the bobbin stripping mechanism comprises a receptacle 5 into which the bobbins fall as they are e'ected from the loom shuttle in the operation of replenishment; a pair of coacting stripper rolls 6 and 7 which are so arranged as to constitute, in efiect, the lower portion of the rear wall of the rece tacle 5, and a second receptacle 8; which is ocated beneath the first and into which the bobbins are dis charged after being stripped.

The receptacle 5 is located below the magazine of the loom and is provided with an in clined bottom wall 9 which is hinged at 10 to the front wall of the receptacle and which is adapted to open downwardly to etl'ect the discharge of the stripped bobbins into the receptacle 8. The lower stripper roll 6 is journalled in suitable bearings, which may for example be carried by the receptacle 5, and said roll is driven from the main shaft 12 of the loom by means of a belt 14 which passes over a pulley 15 on said shaft and a pulley 16 on one of the trunnions of the roll. The upper stripper roll 7 is carried by a swinging arm 18 and is arranged .to rest against and be supported solely by the lower roller 6 so that it will be driven by frictional contact therewith and in a direction opposite to that of the lower roll.

The hinged bottom wall 9 is inclined from the front wall of the receptacle 5 downwardlytoward the rear of the receptacle to cause the bobbins to roll by gravity toward the stripper rolls and the upper stripper roll and said bottom wall are so arran ed relatively to one another that the bobbins to be stripped will readily and invariably adjust themselves in the position indicated at 20 in Fig. 1, the side of the bobbin being engaged by the cylindrical surface of the upper stripr roll 7 but being maintained, by means of the bottom wall 9, out of contact with the lower stripper roll 6. To facilitate the rolling of the bobbins along the bottom wall 9, the latter is provided with a series of spacedapart ridges 21 (see Fig. 2) which extend longitudinally in the direction of inclination of said bottom wall and reduce the area of ppntact between the bottom wall and the bobins.

Normally the hinged bottom wall 9 is.

yieldingly held in closed position by means of a coiled spring 22, the lower end of which is secured to said wall. A. suitable stop such as conventionally shown at 23 serves to determine the normal position of the bottom wall 9. In order that the bottom wall 9 may be enabled to swing downwardly to efiect the discharge of the stripped bobbins, the spring 22 is connected, at its upper end, to the rocking latch dog 25 of the loom which is actuated in the well-known manner to efi'ect the changing of the bobbins. During the normal operation of the loom the latch dog 25 is positioned as shown. in Fig. 1 and the spring 22 is maintained under suflicient tension to effectively hold the bottom wall 9 in closed position. When the latch dog 25 is rocked to initiate the weft replenishing operation, the tension of the spring 22 is relieved and said sprin is lowered bodily to enable the bottom wafi 9 to swing downwardly by gravity a suflicient distance to insure the discharge of the bobbin supported thereby into the receptacle 8.

The bobbins are ejected from the loom shuttle with considerable force and in order to prevent the ejected bobbins from striking directly against the hinged bottom wall 9 and possibly displacing said wall downwardly and escaping in unstripped condition into the receptacle 8, means is provided in accordance with the present invention for intercepting the ejected bobbins before they reach the bottom wall and breaking the force of their downward movement. The means thus provided consists of a shelf or false bottom 26 which is arranged relatively to said bottom wall as shown in Fig. 1. Preferably the false bottom 26 is hinged at 27 to the front wall of the receptacle 5 to permit it to be raised to afford convenient access to the lower portion of said receptacle, and suitable means such as the stop 28 is provided to support said false bottom in operative position. The false bottom 26 is inclined in substantially the same manner as the bottom wall 9 and its lower end is spaced from the rear wall of the receptacle 5 to provide a passageway 30 through which the bobbins may freely pass into the lower portion of the receptacle. Thus the bobbins, after striking the false bottom roll ofi the lower end thereof, and fall upon the inclined bottom wall 9 and finally assume the position shown in Fig. 1 wherein they are in engagement with the upper stripper roll 7 but out of engagement with the lower stripper roll 6.

In operation the stripper rolls are preferably driven in the directions indicated by arrows in Fig. 1. The upper roll 7, by frictional contact with the bobbin 20 tends to rotate the bobbin in a direction counter to the directionin which the yarn is wound thereon and thus tends to cause the yarn to gradually. unwind therefrom and the loose end ofthe yarn to be carried toward the bite of'the rolls 6 and 7. The yarn is then gripped between the stripper rolls and positively unwound from the bobbin and wound up on the lower roll 6. The roll 6 is rotated at suflicient speed to insure that under the usual conditions the yarn will be completely stripped from the bobbin before it again becomes necessary to replenish the loom shuttle. At the start of the replenishing operation the latch dog 25 is rocked in a direction to relieve the tension of the spring 22 and permit the bottom wall 9 to swing downward, whereupon the stripped bobbin falls into the receptacle 8. Preferably the lower roll 6 is slightly coninaeaoee cal in form as shown in Fig. 3 to facilitate the removal of the coils of yarn therefrom.

The invention has been disclosed herein for illustrative purposes in an embodiment at present preferred but itis to be understood that the scope of the invention is defined by the appended claims rather than by the foregoing specification.

What is claimed is:

1. Bobbin stripping mechanism comprising a bobbin receptacle having an inclined bottom wall for causing the bobbins to roll into position to be stripped, a stripper roll coacting with said bottom wall to support a bobb1n in said position, said roll being rotated to frictionally turn said bobbin in a direction to facilitate the unwinding of the yarn therefrom, a second stripper roll coacting with the first stripper roll and so.

located as to be out of contact with the bobbin while it is being stripped, said second roll being rotated oppositely to the first roll to enable the yarn to be gripped between the rolls as it unwinds from the bobbin.

2. Bobbin stripping mechanism comprising a bobbin receptacle having an inclined bottom wall for causing the bobbins to roll into position to be stripped, said bottom wall having a series of raised ridges thereon extending longitudinally in the direction of the incline for facilitating the rolling of the bobbins, a stripper roll coacting with said bottom wall to support a bobbin in said position, said roll being rotated to frictionally turn said bobbin in a direction to facilitate the unwinding of the yarn therefrom, a second stripper roll coacting with the first stripper roll and so located as to be out of contact with the bobbins while they are being stripped, said roll being rotated oppositely to the first roll to enable the yarn to be gripped between the rolls as it unwinds from the bobbin.

3. Bobbin stripping mechanism for weft replenishing looms comprising a rece tacle for receiving the bobbins as they are e ected from the shuttle, said receptacle hain'ng a downwardly opening bottom wall, a stripper roll coacting with said bottom wall when the latter is in closed osition to support a bobbin in position to stripped, said roll being rotated to frictionally turn said bobbin in a direction to facilitate the unwinding of the yarn therefrom, a second stripper roll coacting with the first stripper roll and so located as to be out of contact with the bobbins while the latter are being stripped, said roll being rotated in a direction opposite to the direction of rotation of the first roll to enable the yarn to be gripped between the rolls as it unwinds from the bobbin, and connections between said bottom wall and a periodically movable member of the loom, operative to hold said wall nomally in closed YES position and adapted to permit said wall to open to effect the discharge of a stripped bobbin prior to the arrival of a newly ejected bobbin within the receiver.

4. Bobbin stripping mechanism for weft replenishing looms comprising a receptacle for receiving the bobbins as they are ejected from the shuttle; said receptacle having a downwardly opening bottom wall, a stripper roll coacting with said bottom wall when the latter is in closed position to sup port a bobbin in position to be stripped, said roll being rotated to frictionally turn said bobbin in a direction to facilitate the unwinding of the yarn therefrom, a second stripper roll coacting with the first stripper roll and so located as to be out of contact with the bobbins while the latter are being stripped, said roll being rotated in a direction opposite to the direction of rotation of .the first roll to enable the yarn to be gripped between the rolls as it unwinds from the bobbin, and yielding connections between said bottom wall and a portion of the loom mechanism which is operative to effect the changing of the bobbins, for normally maintaining said wall in close position and permitting said wall to open by gravity to effect the discharge of a stripped bobbin.

5. Bobbin stripping mechanism comprising a bobbin receptacle having an inclined bottom wall for causing the bobbins to roll into position to be stripped, a cylindrical stripper roll coacting with said bottom wall to support a bobbin in said position, said roll being rotated to frictionally turn said. bobbin in a direction to facilitate the unwinding of the yarn therefrom, a second stripper roll coacting with the first stripper roll and so located as to be out of contact with the bobbin while it is being stripped, said second roll being 'otated oppositely to the first roll to enable the yarn to be gripped between the rolls as it unwinds from the bobbin and to be wound u on; said second roll, and said second roll Being of slightly tapering form to facilitate the stripping of the coils therefrom.

6. Bobbin stripping mechanism for weft replenishing looms comprising a bobbin receptacle adapted to be located beneath the magazine of the loom, said receptacle having a downwardly opening inclined bottom wall normally maintained yieldingly in closed position, a pair of coacting stripper rolls constituting a portion of one side wall of said receptacle adjacent the lower end of said bottom wall, connections between said bottom wall and a part of the loom mechanism which starts the changing of the bobbins for effecting the opening and closing of said bottom wall, and pivoted means for intercepting the ejected bobbins before they strike said bottom wall to prevent the latter from being accidentally opened by the im pact of the bobbins.

7 Bobbin stripping mechanism for weft replenishing looms comprising a bobbin receptacle adapted to be located beneath the maganize of the loom, said receptacle having a downwardly opening inclined bottom wall normally maintained yieldingly in closed position, a pair of coacting stripper rolls constituting a portion of one side wall of said receptacle adjacent the lower end of said bottom wall, connections between said bottom wall and a part of the loom mechanism which starts the changing of the bobbins for effecting the opening and closing of said bottom wall, and a pivoted false bottom overlying the greater portion of said bottom wall and spaced therefrom to receive the impact of the ejected bobbins to prevent them from prematurely opening said bottom wall, said false bottom being rigidly supported against downward movement and capable of being displaced u wardly to afford access to said bottom wa 1.

In testimony whereof I have aflixed my signature.

ROBERT NEWELL.