US399656A

US399656A - Setts

Info

Publication number: US399656A
Authority: US
Publication date: 1889-03-19
Anticipated expiration: 1906-03-19

Description

(No Model.)

J. DAVIDSON & J. BANNISTER.

PIGKER CHECK FOR LOOMS. No. 399,656 Patented Mar. 19, 1889*.

lhvrrnn States Patent @rrrcn.

PlCKER-CHEC TTS.

K FUR LOOlVlS.

SPECIFICATION forming part of Letters Patent No. 399,656, dated March 19, 1889.

Application filed December 1, 1888. Serial No. 292,433. (No model.)

To all whom it may concern/.-

Be it known that we, JAMES DAVIDSON, a subject of the Queen of Great Britain, and Jesse BANNISTER, a citizen of the United States, residing, respectively, at New Bedford, in the county of Bristol and State of Massachusetts, have jointly invented a new and useful Improvement in Picker-Checks for Looms, of which the following is a specification.

In buifers for looms or picker-checks which have heretofore been used the means employed to ease the sh uttlc to a stop has produced a recoil or rebound of the shuttle, and this rebound has had a tendency to break the thread and thereby cause trouble and waste.

The object of this invention is to produce a buffer for looms which will have no recoil, and thereby obviate the breaking of the thread.

To this end our invention consists of a piv oted lever having a pawl to engage a ratchet and an arm to project under the lathe of a loom and in rear of the picker-stick, a ratchet and pulley mounted on the side of the lathe and actuated by said pawl, a strap orband attached to the lathe and passing around said pulley to produce by friction the necessary resistance to the turning of said ratchet and pulley, and a spi ral spring attached to the lathe and to the end of the strap or band, by means of which the friction of the strap or band on the pulley is regulated.

In the accompanying drawings, Figure l is a side elevation of a portion of a loom, showing a part of the'lathe, the picker-stick, tug-strap, and rod, and our improved buffer secured to the side of the lathe. Fig. 1 is a detail view. Fig. 2 represents a side view of the buffer, showing the construction and arrangements of its parts.

a represents the lathe, to the side of which and near the endis fixed our improved buffer, which is composed of the flanged pulley 0, made integral with or firmly secured to the ratchet (Z, the lever e, carrying the pawl f and having the arm g pivoted in such a manner that the pawl f will take into the ratchet d that is to say, journaled on the same shaft which carries the ratchet and pulley, said shaft 0 having the plate 10, by means of which the whole device is secured to the side of the lathe, and the strap or band h, having one end secured to the stud m and wrapped around the pulley c, and the spiral spring 5, attached to the lathe and to the end of the strap h. In the end of the strap 71, next to the spring 3, are holes, (see Fig. 1,) into which the end of the spring may be hooked, and thus the tension or friction of the strap on the pulley be regulated. The arm g projects under the lathe in such a manner as to cross the path which the pickerstick traverses.

It will be observed that the upper portion of the lever e,which carries the pawl f, projects from its pivotal point at about a right angle to the lower portion of the same.

The operation of the device is as follows: The device being secured to the side of the lathe and the strap 72 adjusted and secured as shown, it is obvious that when the picker-stick l) is given an impetus to throw the shuttle and arrives at the position shown by the dotted lines 7', the lever 6 will of its own gravity assume the position shown in dotted lines, and the pawl f will also by gravity engage with the ratchet (1. When the picker-stick is thrown to the end of the lathe again and receives the impact of the shuttle, it strikes the arm g and forces it to the rear, which 1notion,'by means of the pawl f, gives the ratchet d and the pulley c a partial revolution. The resistance necessary to ease the motion of the shuttle to a stop is furnished by the friction of the strap h on the pulley c. This friction can be regulated to any desired extent by means of holes in the end of the strap, into which the end of the spring .9 is hooked, so as to give a greater or less tension to the spring.

It will also be observed that when the shuttle is stopped by the buffer there is no recoil or impulse to start it back again until it is given by the pickenstick.

\Vhatwe claim, and desire to secure by Letters Patent, is

A buffer for looms, consisting of a lever carrying a pawl to engage a ratchet and an arm to project under the lathe to receive the of the strap, substantially as and for the purblOW of the picker-stick in its backward mopose shown and described. tion, a ratchet and pulley pivoted to the JAMES DAVIDSON.

lathe, With said pawl engaging the ratchet, a JESSE BANNISTER. strap or band attached to the lathe and Witnesses:

Wrapped around said pulley, and a spiral J. L. GILLINGHAM,

spring attached to the lathe and to the end H. W. MASON.