US1502880A

US1502880A - Drop-box mechanism for looms

Info

Publication number: US1502880A
Application number: US659464A
Authority: US
Inventors: Eppa H Ryon
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1923-08-27
Filing date: 1923-08-27
Publication date: 1924-07-29
Anticipated expiration: 1941-07-29

Description

July 29, 1924.

' E. H. RYON DROP BOX MECHANISM FOR LQOMS Filed Aug. 27. 1925 llvmwra [PPA hf Fro/v Arzwimsys Patented July 29, 1924.

EPPA H. RYO'N, OF WALTHAMI, MASSACHUSETTS, ASSIGNOR T CROMPTON & KNOWLES LO'OM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHU- D'ROP-BGX' MECHANISM FOR LOOMS.

Application filed August 27, 1923. Serial No. 659,464.

T 0 all whom it may concern Be it known that I, EPPA H. RYoN, a citizen of 'the United. States, residing at \Valtham, in the county of Middlesex and State of Massachusetts, have invented a new and useful Drop-Box Mechanism for Looms, of which the following is a specification.

This invention relates to looms of the drop box type, and particularly to improved devices for lifting the drop boxes in such looms.

It is the object of my invention to improve the construction of the box-lifting mechanism, reducing the cost of manufacture and providing a more satisfactory and desirable arrangement of parts.

With this general object in view, an important feature of my invention relates to an improved construction by which overthrow of the boxes may be prevented. Further features of my invention will be hereinafter described and more particularly pointed out in the appended claims. I

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a front elevation of a portion of a loom including my improved drop box mechanism Fig. 2 is a similar view but showing the parts in a different position;

Fig. 3 is a sectional plan view taken along the line 33 in Fig. 2;

Fig. 4 is a sectional elevation of certain detail parts, and V Fig. 5 is a. sectional elevation of additional detail parts.

Referring to the drawings, I have shown a portion of a loom side 10. a lay 11 supported by a sword 12, and a shaft 13 upon which the lay 12 is mounted and which also supports an end bracket 14:. Drop boxes 15 are slidably mounted at the end of the lay 11 and are provided with a lifting rod 16 secured to the bottom of the drop boxes and extending downward therefrom.

A. sleeve 17 is slidably mounted on the lower end of the rod 16 and is also slidable in a bearing 18 on the bracket 14-. A collar 19 limits downward movement of the sleeve 17 on the rod 16 and a relatively heavy coil spring 20 is interposed between the upper end of the sleeve 17 and the lower side of the drop boxes. The spring 20 on the rod 16 is provided merely as a yielding or giveproperly and would interfere with movement of the boxes 15.

A box lifting chain 21 is connected by a link 22 to certain actuating mechanism not shown. The chain 21 passes over a pair of guide pulleys 23 and is connected by a rod or link 24 to an arm 25 projecting laterally from the lower end of the sleeve 17. The rod 2 1 is preferably threaded at its lower end into the arm 25 and is-provided with a lock nut 26 to preserve its adjustment.

The parts thus far described are or may be oflthe usual construction and in themselves form no part of my invention which relates specifically to the provision of improved yielding means for preventing over throw of the drop boxes when shifted suddenly from one extreme position to the other. i

For this purpose, I provide a relatively light spring 27 surrounding the rod 24 and engaging the arm 25 at its lower end. The upper end of the spring 27 is secured in a collar 28 which is slidable on the rod or link 24. A second relatively light spring 30 of larger diameter is mounted in a recess 31 (Fig. 5) of a bracket 32 in which the guide pulleys 23 are pivoted. The lower end of the spring 30 is secured to the outside of the collar 28 and the upper end engages the upper end of the recess or opening 31. The spring 30 is of such diameter that it permits the chain 21 to pass freely therethrough.

The provision of the two

springs

27 and 31 connected by the sliding collar 28 enables me to use a spring of sufficient length to permit the desired range of movement of the drop boxes and also avoids the use of a single long spring of the large diameter of the spring 30. A spring of this diameter and of the combined length of the two springs would be extremely weak against compression and consequently would not be effective in use.

In Fig. 1, the boxes 15 are shown in their lowest position, with the

springs

24 and 30 extended, and in Fig. 2, the boxes are raised to their highest position and the spring 30 is compressed within the opening 31 of the bracket 32.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims but what I claim is 2 1. In a loom having a plurality of drop boxes, box lifting mechanism comprising a lifting chain, a rod connected thereto, a yielding connection between said rod and boxes, and a spring device: encircling said rod and the end portion of said chain and acting to prevent overthrow of said boxes.

2. In a loom having a plurality of drop boxes, box lifting mechanism comprising a lifting chain, a rod connected thereto, a

yielding connection between said rod and boxes, a spring encircling said rod, a second spring encircling the end portion of said chain, and a collar slidable on said rod and connecting said springs to act as a single compression. member, to prevent overthrow of said boxes,

3. In a loom having a plurality of drop boxes, box lifting mechanism comprising a lifting rod depending from said boxes, sleeve slidable on said rod, means to limit downward movement or" said sleeve on said rod, a relatively heavy spring encircling said rod and interposed between said sleeve and said boxes, a lifting chain. a second rod connecting a projecting portion of said sleeve to said chain, a relatively light spring encircling said second rod and an end portion of said chain, and a fixed abutment for the upper end of said spring, the lower end thereof engaging said projecting portion of said sleeve to prevent overthrow of said boxes.

4. In a loom having a plurality of drop boxes, box lifting mechanism comprising a lifting rod depending from said boxes, a sleeve slidable on said rod, means to limit downward movement of said sleeve on said rod, a relatively heavy spring encircling said rod and interposed between 'said sleeve and said boxes, a lifting chain, a second rod connecting a projecting portion of said sleeve to said chain, a relatively light spring encircling said second rod and engaging said portion of said sleeve, a second spring encircling anend portion of said chain, and a collar slidable on said second rod and connecting said springs, said springs acting together to yieldingly force said rod and chain in a downward direction.

In testimony whereof I have hereunto ai'lixed my signature.

EPPA H. RYON