US154237A - Improvement in shuttle-box mechanisms for looms - Google Patents

Description

M. A. FB RBUSH.

Shuttle Box Mechanisms for Looms.

Patented Aug.1, 1874.

TNE GRAPHIC C0-FHOT0'LITH-39L 4-! PAF iK PLACE, ILY.

UNITED STATES PATENT, QFFICE.

MERRILL A. FUEBUSH, 0E PHILADELPHIA, PENNSYLVANIA, AssIeNon T0 HIMSELF AND 0. A. FURBUSH, OF SAME PLAoE.

IMPROVEMENT IN SHUTTLE-BOX MECHANISMS FOR LOOMS.

Specificatlon forming part of Letters Patent No. 154,23, dated August 18, 1874; application filed July 25., 1874.

To all whom it may concern:

Be it known that I, MERRILL A. FORBUSH,-

tion, D, (fully described hereafter,) so that the said boxes shallb'epositively lowered, as well as raised, by thelever, and yet be capable of yielding should any obstruction be offered to their free movement. (See elevations, Figs. 1 and 2 of the accompanying drawing.) E represents one of the side frames of a loom, to which the weighted drop-box lever B is hung at the point a, a vibrating movement being imparted to the said lever from the cam-shaft F, through the medium of an anchor-lever, H, and devices connected therewith, which are of a character so well known as to render minute description unnecessary.

In ordinary drop-box looms the arm b of the lever B is connectedto and imparts a reciprocating movement to a vertical rod having an enlargement or shelf at its upper end, upon which the Shuttle-boxes A simply rest, without being secured thereto. The connection between the lever and rod d is such as to. permit the latter and the boxes to yield should the said boxes meet with any obstruction durin g their upwardmovement, while the rod can descend Without the boxes should the latter meet with any obstruction during their downward movement.

This arrangement answers well for some classes of weaving, but prevents the attainment of a very high speed, for, as the boxes descend by gravity alone, their movement must be comparatively slow-an objection which I overcome by drawing the said boxes downward, as well as forcing them upward, by positive mechanism. which will permit them to yield when necessary in either direction.

The boxes A are permanently secured to a vertical rod, d, guided by and arranged to slide freely through projections e and e on the frame of the loom. On this rod is wound a spiral spring, f, by the action of which two slides, h and h, which also embrace the rod,

'aremai-ntained in contact with fixed collars t and t on the latter, as shown in Fig. I. These slides are also adapted to slots jj in a plate, k, which is connected, by a link, m, to the arm hot the drop-box lever.

The spring f is of sufficient strength. to maintain the slides hand h at the ends of the slots in the plate It and against the shoulders of the rod (1, so that the shuttle-boxes A must be positively lowered, as well as raised, by the lever B, during the ordinary working of the loom at any required rate of speed; but if the said boxes should meet with an obstruction during their downward movement the spring f will yield and permit the descent ot' the plate It and slide h, while the rod-djslide h, and boxes remain stationary, and if the obstruction should occur during the ascent of the boxes the movementof the latter would,

in like manner, be stopped, but the spring would be compressed from its opposite end by the slide it, which would continue to rise with the plate It, as shown in Fig. 2.

I claim as my invention The combination, substantiallyas described, I

of a double-acting spring-connection, D, with a series of shuttle-boxes, A, and their operat ing-lever B, for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

M. A. FUBBUSH.

Witnesses:

WM. A. STEEL, HUDERT HowSoN.

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