US2303297A

US2303297A - Take-up and let-off release mechanism

Info

Publication number: US2303297A
Application number: US376498A
Authority: US
Inventors: Walter J Budzyna; William E Lundgren
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1941-01-29
Filing date: 1941-01-29
Publication date: 1942-11-24
Anticipated expiration: 1959-11-24

Description

Nov- '24, 1942- w. '.1. BUDZYNAETAL 2,303,2911

TAKE-UP AND LET-OFF RELASE MECHANISM Filed Jan. 29, 1941 2 Sheets-Sheet 2 y INVENTOR MALTE/2 d. BuDzY/vA. W/LL/AM E. LU/YDGEE/v. v

Ame/Vex Patented Nov. 24, 1942 UNiTED STATES PATENT OFFICE TAKE-UP AND LET-OFF RELEASE MECHANISM Application -January 29, 1941, Serial No. 376,498

6 Claims.

This invention pertains to looms and more particularly relates to let-olf and take-up mechanisms therefor.

In certain types of looms the let-off and take-up y mechanisms are operated from some moving part of the loom, usually the lay sword. Accordingly whenever it becomes necessary to turn the loom by hand, as when a pick-out occurs, it is necessary that the let-off mechanism and the take-up mechanism fbe rendered inoperative.

Various devices for rendering the let-off mechanism and the take-up mechanism inoperative have been proposed. However, such prior devices have either been too complicated and expensive to manufacture or have been inconvenient to operate. Y

Accordingly it is a principal object of the present invention to provide in a loom of the type aforesaid having a let-onf mechanism including a member movable :froml operative to inoperative position, reciprocating means engaging the member when in operative position for actuating the let-off, and take-up mechanism including a ratchet and pawls, a simple, inexpensive and convenient means for rendering said mechanisms ln- 4 A operative, which shall comprise a single manually operable lever pivotally mounted on the loom. and

means connecting said lever to said member and to one of said pawls and arranged to render said mechanisms inoperative when said lever is de- Pressed.

This and other objects of the invention are accomplished in the construction illustrated on the accompanying drawings, wherein:

Fig. 1 is a side elevation of the left hand side of I a loom showing the let-ofi' and take-up mechanisms together with our invention applied thereto.

Fig. 2 is a front View of part of the mechanism shown on Fig. 1;

Fig. 3 is a plan view of one detail of the mechanism for disconnecting the let-off mechanism;

Fig. 4 is a side view Vof the mech-anism shown on Fig. 3; and,

Fig. 5 is a side view partly in cross section of the mechanism for disconnecting the take-up mechanism.

The drawings show a well known form of loom having my invention applied thereto. The drawings show a left hand loom side frame I a lay sword 2, a warp 'beam 3, let-ofi' mechanism indicated generally at 4 and take-up mechanism indicated generally at 5.

The particular type of let-off mechanism shown is a positive type of let-01T and may be similar 55 to the well known Bartlett type of let-off. The let-off mechanism may comprise a bracket 6 mounted on the side frame I. A vertical shaft I having a hand wheel 8 at one end and a ratchet wheel 9 at the other is mounted in lbearings carried by the bracket. A worm I 0 is fixed to shaft I intermediate the ends thereof. A horizontal shaft II is geared to the warp beam at one end and has a worm wheel I2 geared to worm I0 at the other end. A pawl carrier I3 having two pawls I4 and I5 for engaging the ratchet wheel 9 is loosely mounted on vertical shaft 1. A rod vI6 is pivotally connected to pawl carrier I3 at one end and is slidably mounted in a bearing I at the other end. A reciprocating lever I8 is adjustably connected to the sword as at I9 and has an upturned apertured end 2|) which slidably engages the rod I6. The lever I8 engages a member 2| pivotally attached to a bracket 22 mounted on rod I5 for moving rod I6 to the right, as viewed on Fig. 1, to thereby rotate the ratchet wheel 9 and shaft 1 in a direction to eiect let-01T of the warp sheet from the warp beam. A coiled spring 23 is mounted on rod I5 between bracket 22 and bearing Il for movingrod I6 to the left, as viewed on Fig. l. Y

Member 2| has `a concave bottom surface adapted to embrace rod I6. At its rear end member 2| is convexed as at 24 so that upon engagement with the concave surface 25 of the upturned end 2B of lever I8, the member 2| will not be pushed upwardly. The forward end of member 2| is bifurcated, forming arms 25 and 2l. An pin 28 extends through a projection 29 formed on the bracket 22 and arms 26 and 2l are pivotally mounted on pin 2B. A set screw 3|! extends through the projection 29 and engages the pin 28 to hold the pin in position. Member 2| has a lug 3| extending laterally therefrom. for a purpose hereinafter to be described.

When the pivoted member 2| is in its lowered position embracing rod I6 it is in operative position and upon operation of the loom, member 2| will be engaged :by the upturned end 20 of reciprocating lever I8 to eiect operation of the letoi mechanism. When member 2| is raised to inoperative position out of engagement with rod I6, member 2| will not be in position to be engaged by the upturned end 20 of lever I8 and the let-off mechanism is rendered inoperative.

The take-up mechanism may be of the usual ratchet and pawl type and may comprise a horizontal shaft 32 mounted in bearing 33 on theleft hand side frame I 'and bearing 34 on an upright 35. Shaft 32 has a hand wheel 36 xed thereto mounted thereon and an arm 4| extending downwardly therefrom. A reciprocating rod 42 is adjustably connected to the arm 4I as at 43 andis adjustably connected to the sword as Aat 44.

A stub shaft 45 is mounted in. a bearing 46 on a bracket 41 fixed to the left hand side frame I.

A hold back pawl 48 is xedly connected to one end of shaft 45. A spring, ynot shown, is provided for urging the hold back pawl 48 downwardly into contact with the ratchet wheel 31. An arm 49 is xedly connected to the Vother end of shaft 45 by means of set'screw 59. Arm 49 has an opening 5I therein, for a purpose hereinafter to be described.

When the hold back pawl 48 is in engagement with the ratchet wheel 31 it is in operative position and upon operation of the loom, reciproeating rod 42 will rotate the ratchet Wheel 31 and shaft 32 in a direction to eifectoperation of the take-up mechanism. When'the hold back pawl 48 is raised to inoperative position out of engagement with the ratchet Wheel 31, the takeup mechanism is rendered inoperative as the reciprocation of lever 42 will only cause the ratchet wheel to oscillate.

The mechanism for rendering the let-off and take-up mechanisms inoperative may comprise a manually operable lever 52 fixedly attached to one end of a stub shaft 53 by means of set screw 54. Stub shaft 53 is rotatably mounted in a bearing 55 carried by a bracket 56 attached to the front girt 51. A collar 58 is fxedly mounted on shaft 53. A coiledspring 59 is mounted on shaft 53 between bearing 55 and collar 53 and has one end 58 attached to collar 58 and the other end 6I attached to the bearing 55. A stop 52 is carried by bracket 56. Coiled spring 59 tends to turn the shaft 53 counter clockwise, as seen on Fig. 2 thereby bringing the upper surface 63 of lever 52 into contact with the stop 52 and holding the lever 52 in a horizontal position. A Bowden wire 54 has a head 55 on one end clamped in a boss 66 on bracket 56 by means of set screw 61. The head 65 of the Bowden wire has a plunger 68 normally projecting therefrom into engagement with the outer end 69 of lever 52. The other end of the Bowden wire 64 has a head 19 clamped in a boss 1I formed on the bracket 22 by means of set screw 12. The head 19 of the Bowden wire has a plunger 13 projecting therefrom and engaging the lug 3|, as best seen on Fig. 4. The construction is suchithat when the inner end 14 of lever 52 is pressed downwardly, the outer end is raised pushing the plunger 68 into the head 65 causing the plunger 13 to be further projected from head thereby raising the lug 3| and moving member 2| to'inoperative position, thus rendering the let-olf mechanism inoperative.

A rod 15 has one end 16 extending through the opening 5| in arm 49 and the other end 11 extending through an opening 18 in the outer end G9 of the lever 52. An adjustable collar 19 is fixed to rod 15 directly below arm 49 and an adjustable collar 80 is fixed to rod 15 directly above the outer end 69 of the lever 52. 'Ihe construction is such that when the inner end 14 of lever 52 is depressed, the outer end 69 engages the collar 8U and raises the rod 15 which by means 75" of collar 19 raises the arm 49 and thereby moves the hold back pawl 48 to inoperative position out of engagement with the ratchet wheel 31.

The operation of the device is as follows:

When for any reason a pick-out is necessary, the loom is stopped and then turned over by hand for the necessary number of picks to make the pick-out.

When the loom is turned over by hand for a pick-out it is highly desirable that the let-o and take-up mechanisms be rendered inoperative. With our invention this is easily accomplished by the loom operator.

After the loom has stopped and before turning it over by hand the operator steps upon the inner end 14 of lever 52. This causes the Bowden wire to raise the member 2| to inoperative position so that when the loom is turned over by hand the lever I8 will not move rod I6 and operate the let-off. At the same time the rod 15is raised thereby lifting the hold back pawl 48 to inoperative position. With the hold back pawl 48 inoperative, When the loom is turned over by hand the drive pawl 40 will merely oscillate the ratchet wheel 31 and will not rotate the take-up, so the take-up is rendered inoperative. When the operator removes his foot from the lever the let-off and take-up mechanisms are again rendered operative.

It should be noted that the particular type of let-off and take-up mechanism shown is by way of illustration only as our invention is equally adaptable to other types of let-os and take-ups.

Having thus fully disclosed the preferred embodiments of our invention, we claim:

1. In a loom having a let-off mechanism including a member adapted to be moved from an operative to an inoperative position and reciprocating means engaging said member and actuating said let-olf mechanism only when said member is in operative position and a take-up mechanism including a ratchet and pawls with means connected to one of said pawls for moving same to an inoperative position to thereby render said take-up mechanism inoperative, the combination of a single manually operable lever pivotally mounted on said loom, afmember having one end associated with said lever and the other end associated with said iirst named member for moving the latter to inoperative position when said lever is depressed and a member connecting said lever and said second named means for actuating the latter to move said pawl to inoperative position vwhen said 1ever is depressed whereby upon depressing said lever said let-off mechanism and said take-up mechanism simultaneously are rendered inoperative.

. 2. In a loom having a let-off mechanism including a member adapted to be moved from operative to inoperative position and reciprocating means engaging said member onliT when said member is in operative position for actuating said let-olf and a take-up mechanism including a ratchet and pawls with oneof said pawls being adapted to be moved from operative position to an inoperative position to thereby render said take-up mechanism inoperative, the combination of a manually operable lever pivotally mounted on the loom, a Bowden Wire having one end associated with said lever and the other end associated with said member for moving said member to inoperative position when said lever is depressed and means connecting said lever and said pawl for moving said pawl to inoperative position when said lever is depressed, whereby upon de- Dressing said lever said let-ofi mechanism and said take-up mechanism simultaneously are rendered inoperative.

3. In a loom having a let-off mechanism including a member movable from operative to inoperative position and a reciprocating means engaging said member when said member is in D- erative `position for actuating said let-oil and a take-up mechanism including a ratchet wheel, driving pawl, and a stub shaft mounted on the loom and having a hold back pawl iixedly mounted on one end thereof for engaging the ratchet wheel with said hold back pawl being adapted to be moved from engagement with said ratchet wheel to an inoperative position to thereby render said take-up mechanism inoperative, the combination of an arm ixedly attached to the other end of said stub shaft, a manually operable lever pivotally attached to the loom, a push rod having one end connected to said lever and the other end connected to said arm for moving said hold back pawl to inoperative position When said lever is depressed and a member having one end associated with said first named member and the other end associated with said lever for moving said first named member to inoperative position when said lever is depressed, whereby said let-oli and said take-up mechanisms simultaneously are rendered inoperative upon depressing said lever.

4. In a loom having a let-off mechanism including a stop member movable from operative to inoperative position and reciprocating means engaging said member only when said member is in operative position for actuating said let-oi and a take-up mechanism including a ratchet Wheel, a

driving pawl and a stub shaft having a hold back pawl xedly attached-to one end With said hold back pawl being adapted to be moved from operative to inoperative position to thereby render said take-up mechanism inoperative, the combination of an arm xedly attached to the other end of said shaft, a manually operated lever pivotally attached to the loom, a push rod having one end connected to said lever and the other end connected to said arm for raising said arm to thereby move said hold back pawl to inoperative position when said lever is depressed and a Bowden wire having one end associated with said stop member and the other end associated with said lever for moving said stop member to ini operative to inoperative position, a lever having one end connected to a moving part of the loom and the other end slidingly embracing said rod, said lever being adapted to engage said stop member when said stop member is in operative position and move said rod in one direction, resilient means for moving said rod in the other direction, a manually operable lever pivotally mounted on the loom, means connecting said manually operable lever to said stop member for moving said stop member to inoperative position when said manually operable lever is depressed thereby rendering said let-01T mechanism inoperative.

6. In a loom, let-01T mechanism including a shaft, a ratchet wheel fixed thereto, a pawl carrier loosely mounted on said shaft, a rod slidably mounted on the loom and pivotally connected to said pawl carrier at one end, a stop member pivotally connected to said rod, said stop member being movable from operative to inoperative position, a lever having one end connected to a moving part of the loom and the other end slidably embracing said rod, said lever being adapted to engage said stop member when said stop member is in said operative position and move said rod in one direction, resilient means for moving said rod in the other direction, a manually operable lever pivotally mounted on the loom, a Bowden wire having one end associated with said manual- 1y operable lever and the other end associated with said stop member for moving said stop member to inoperative position when said lever is depressed to thereby render said let-oil mechanism inoperative.

WALTER J. BUDZYNA. WILLIAM E. 'LUNDGRENl