US485686A - Picker-check for looms - Google Patents

Description

(No Model.) I I 2 Sheets-Sl 1eet 1.

- S. GREENWOOD.

PIOKBR 01150.1( FOR LOOMSQ No. 485,686. I Patented Nov. 8, 1892.

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s. GREENWOOD.

PIGKER CHECK FOR LOOMS. J 2 No. 485,686 Patented Now-8; 1892-.

Q4: nunms PETERS 1:0,, PHOTO-LITHQ, WASHINGTON, a. 0.,

A than STATES PATENT OFFICE.

SAMUEL GREENWOOD, OF' LOWELL, MASSACHUSETTS.

PlGKER-CHECK FOR LOONIS.

SPECIFICATION forming part of Letters Patent No. 485,686, dated November 8, 1892.

Application filed November 17, 1891. Serial No. 412,157. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL GREENWOOD, a sub ect of the Queen of Great Britain, re-

siding at Lowell, in the county of Middle-sex;

in connection with the accompanying draw-.

ings, and then particularly pointed out and distinctly defined in the claim at the close of this specification.

My invention has among its objects to simplify the construction of a picker-check on the order of that presented in my Letters Patent aforesaid, and thereby make it less costly to manufacture; to arrange the parts of a picker-check more satisfactorily with respect to one another, so that the stresses, strains, and wear incident to its use will be more regularly distributed throughout its parts and the durability will be increased, and to render the devices for regulating the friction of the check more perfectly adjustable and less liable to derangement.

In the accompanying drawings, Figure 1 is a view in front elevation of a loom-lay having my invention applied thereto, the said view representing the shuttle-box which is at one of the ends only of the lay with those portions of the usual protecting mechanism which are adjacent to the shuttle-box that is so shown. Fig. 2 is a view in cross-section on line 2 2 of Fig. 3; and Fig. 3 is an inverted or bottom View of the lay, showing the swords or arms thereof and the picker-sticks in section.

The lay beam or sill is shown at A, the lay sword or arms at B B, the picker-sticks are shown at F F, and at G G G are shown the spring and straps, which are connected with the lower ends of the picker-sticks, the said spring G acting to move the upper ends of the picker-sticks outwardly, as usual.

At S is shown the usual movable front or swell of the shuttle-box, which is located at the right-hand side of the lay in Fig. 1; at S the usual finger, which is carried by the ordinary protector-shaft (not shown) and caused to bear by its upper free end against the front or-swell S by the spring S all as usual.

In my former invention, presented in thepatcut above mentioned, the outward movement of the picker-sticks is checked by means of hooks or offsets extending laterally into the paths of the said picker-sticks from blocks situated to one side of the plane of motion of the picker-sticks, each block having a slot therethrough for the passage of a screw having its threaded end entered into the under side of the lay-beam, the stem of the said screw below the block having thereon a leather or other packing-piecein contact with the under side of the block, a plate partially covering the packing-piece, and a spring located between the covering-plate and the head of the screw, the tension of the spring and the friction created in the movement of the block being regulated by turning the screw. A leading disadvantage of this construction is the decided twisting or side stress or strain which results from the blows of the picker-sticks against the laterally-extending offsets or hooks, this stress or strain racking the devices, being destructive of the combined parts, and occasionin g an excess of friction which cannot be controlled by the screws. Other disadvantages are the unsatisfactory working of the adj usting devices and the liability of such devices to get out of order.

In accordance with my present invention I provide straps D and D, one for each pickerstick. Each of these straps is doubled upon itself, as shown clearly in Fig. 3, so as to form aloop or bight, within which is located the correspondingpicker-stick. Friction-clamps C C are attached to the lay beam or sill in front and in rear, respectively, of the slot f, within which the picker-stick F works, and through these clamps are passed the opposite ends of the strap D. Similar friction-clamps O C are similarly disposed with relation to the slot f, within which the picker-stick F works, and through them are passed the .opposite ends of the strap D. The extremities of the straps D D have secured thereto loops d d and d 01 respectively, which screw onto the opposite ends of the rods d d. (Shown in Figs. land 3.) The .said rods 61 d are supported 'by and slide through stands "E E in which are secured leather brushings for the purpose of reducing the wear of the rods. The construction of the frictionclamps is shown clearly in Fig. 2. Each clamp consists of two metal parts 0 c, which preferably are made of malleable iron. Between the upper portions of the parts 0 c is placed a piece of leather 0 for the purpose of separating somewhat the said upper portions and getting a more even pressure upon the leather strap D or D, which passes between the lower portions of the parts cc. Screwstc csecurethe clamps to the lay beam or sill. Those portions of the parts 0 c of a clamp which depend belowthe lay-beam or lay-sill have placed between them the horseshoe-piece of leather a, between the limbs of which is passed the portion of the strap D or D which is acted uponby that clamp, the saidportion of the strap sliding between and in contact with the faces 0 c of the said piece of leather 0 A screw 0 passes through part c and the piece of leather 0 and istappedinto the part 0', so

that by tightening or loosening the said screw 0 the necessary friction upon the straps may be obtained to check and arrest the motion of the shuttle.

The action of the described construction and combination of parts in checking a shuttle is clearly apparent, and is as follows: As will be observed in Fig. 1,.t-he spring G, which is connected with the lower ends of the pickersticks F F by the straps G G, tends tohold the upper ends of the said picker-sticks separated as far as is practicable and to keep the leather-straps D D andthe rods d d'taut. The length of the straps D andD and their connections isnots'ufficient to permit both the picker-sticks to be at the outer extremities of the slots ff at thesame time. In the drawings picker-stick F is shown at the outer extremity of the slot f. Therefore, when the picker-stickF is struck by the shuttle after the flight of the latter across the loom from right to left in Fig. 1 the said picker-stick is free to move a short distance to the left. The force of the blow is overcome and the shuttle is checked and arrested by the resistance arising from the friction generated in the movement of the straps D D through the clamps C 0 (3 C as the picker-stick F thus moves. This movement of the picker-stick F causes the picker-stick Fto be drawn, through the described connections, away from theouter end of slot f into position to receive the blow of the shuttle in the flight of the latter from leftitorright. "It willbe seen that in this my present invention each outward movement of either picker-stick under the impact of the shuttle is resisted by the friction created by all four friction-clamps, and also that the strains occurring while the shuttle is being strap are'placed as nearly as possible equidistant from the plane of movement of the picker-sticks, in order to balance the strains most perfectly. In my present device the wearis verylight andis uniformly distributed.

In my former invention the adjustingscrews f f shown in my patent aforesaid were screwed intothe wooden substance of the lay beam or silland the thread in the hole in the latter was easily worn out by the turning and reversing of the said screws. This defect is wholly obviated in my present construction. The eye-shaped heads of the said adjusting-screws render the screws liable to be bent or knocked out of place by an ac cidental blow, whereas the screws 0 neither project into the-way nor are liable to injury.

The ordinary method of checking and arresting themotion of a shuttle by means of powerful binder-springs located in or adjacent to the shuttle-box causes excessive wear of the shuttle and requires a very powerful blow of the picker-stick for the driving of the shuttle out of one box and across the loom to the other box. By the use of a checking device on the order of that shown the use of powerful binder-springs is rendered unnecessary and the shuttle may be driven with a blow of reduced force.

I claim as my invention- The combination of the picker-sticks with the leather straps passing around the tops of the picker-sticks, means for connecting together the corresponding endsof "thesaid straps, and the clamps engaging with the opposite sides or limbs on each. of the loops of the said straps, substantially as described.

In witness whereof I have signed this specification, in thepresence of two attesting witnesses, this 6th day ofNovember, 1891.

SAMUEL GREENVOOD.

Witnesses:

SAML. G. STEPHENS, GEORGE VWPOORE.

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