US569570A

US569570A - Picker-strap dog for looms

Info

Publication number: US569570A
Authority: US
Publication date: 1896-10-13
Anticipated expiration: 1913-10-13

Description

(No Model.) P. ASHBY.

y PIGKER STRAP DOG FOR LooMs. No. 569,570. Patented oet. 13, 189@ UNITED STATEs PATENT QEETCE.

PETER ASIIBY, OF VALLEY FALLS, RHODE ISLAND, ASSIGNOR TO THE VHITIN MACHINE IVORKS, OF VHITINSVILLE, MASSACHUSETTS.

PICKER-STRAP DOG FOR LOONIS.

SPECIFICATION forming part of Letters Patent No. 569,570, dated October 13, 1896.

Application filed Tune 11, 1896.

To (all whom it may concern.:

Be it known that I, PETER ASHBY, of Valley Falls, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Picker-Strap Dogs for Looms; and Ihereby declare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings, forming part of this specification. f

In a leoni for Weaving cloth the shuttle by which the weft is laid is driven through the open shed ofthe Warp by ineans of the pickerstick. This stick usually starts the shuttle out of the shuttle-box and then by giving to the shuttle a sudden blovT sends it across the width of the fabric into the opposite shuttlebox. This is usually etfectcd bythe use of a cani which bears against the picker-roll turning on a pin extending from an arm of the pickershaft, thereby partially turning the picker-shaft until a sudden projection of the cani strikes the picker-roll and gives to the picker-shaft the sharp sudden turn which, transmitted to the picker-stick, gives the sudden blow to the shuttle by which it is sent across the fabric. The picker-shaft is provided With an arm, on the outer end of which the dog is secured. A picker-strap connects the dog with thev picker-stick. The arm on the picker-shaft has also been connected with the pickerstick by the picker-strap Without the use of the dog. The arm on the pickershaft, which for convenience I may call the picker-arm, swings in a vertical plane and thus changes the angle of the surface on the arm or on the dog against Which the loop of the picker-strap bears, so that at the time when the blow is exerted the strap bears only at one edge on the picker-arm or the dog. These sharp blows soon Wear and weaken this part of the loop of the picker-strap, and in power-loonis ruiming at the high speed nonY used the loop of the picker-strap connected with the picker-arm Wears out very rapidly, thereby causing the stoppage of the looln and the renewal of this part of the pickerstrap.

The object of this invention is to prevent this local Wearing of the loop by so constructing the dog that at the time when the blow is Serial No. 595,097. (No model.)

given and the full force exerted the loop will bearv on the dog fairly and along its Whole Width.

Figure l is a view showing the connection 0f the picker-arm with the picker-stick in the relative positions when the picker-stick has been drawn fully back by the picker-stick spring. Fig. 2 is an enlarged View showing the dog secured to the Vpicker-arm, theloop 6o of the pickerstrap being shown in section and the position of the picker-arm being the same as in Fig. l when no strain is exerted on the picker-strap. Fig. 3 is an enlarged view showing the picker-arm, the dog, and the loop of the picker-strap in the position when the projection on the cani strikes the picker-roller and the force is transmitted by the picker-strap to the picker-stick to send the shuttle across the fabric and the loom. 7o The loop of the picker-strap is shown in section and shows the surface bearing on the dog the Whole Width of the strap. 4 is a transverse sectional View of the dog.

In the drawings, 5 indicates the picker- 75 arm; G, the picker-stick; 7, the dog secured to the free end of the picker-arm. The dog 7 consists-of the face-plate 7', in the center of which the clamp-screw 8 is secured by screwthreaded engagement. From the upper end 8o of the plate 7 the bracket 72 projects and from the lower end the bracket 73. Both of these brackets are slotted for the reception of the pickerarin 5. The bracket 7 3 is longer than the bracket?. The ends of the brackets 72 and 73 are connected by the strap-bar 74, Which forins an angle of less than ninety degrees or right angle with the bracket 73 and an angle of more than ninety degrees With the bracket 72, the angular position of the 9o strap-bar 74 being such that the strap bears its Whole Width on the bar when the greatest strain on the strap is exerted.

In practice I find that the strap-bar '74, when inclined at an angle of about twenty degrees to the picker-bar, will forni a fair bearing on the loop, but I do not Wish to confine myself to any particular angle, as the same may be varied to the oscillation of the Y picker-arm. The loop 9 extends through the. roo dog and is connected with the loop 10 by the link 11. This construction allows some ad- Patent- A piek-strap dog: comprising upper and lower members havmg opemngs to reeelve Jche picker-arm, a connecting-plate for the rear ends of said members, and an inclined strap-ber connecting the forward ends of the members, together with a, clamping device carried by the oonneeting-plate, whereby the pick-strap dog; may be secured to a pieker- In Witness whereof l have hereunto setmy hand.

PETER ASHBY. Witnesses:

JOSEPH A. MILLER, Jr., M. F. BLIGH.