US404964A - Sewing-machine fan attachment - Google Patents

Description

(No Model.)

W. S. ELLIOTT.

SEWING MACHINE FAN ATTAGHMENT.

No. 404,964. I Patented June 11 1889.

WITN ESEEE INVENTDR' Wm fia v W N PETERS, Fhohrlhhographcr. Washington D. Q

PTUNITED STATES PATENT ()FFICE IVALTER SCOTT ELLIOTT, OF HARTFORD, CONNECTICUT.

SEWING-MACHINE FAN ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 404,964, dated June 11, 1889.

Application filed May 17, 1888. $erial No. 274,157. (No model.)

To all whom it may concern.-

Be it known that LWALTER SooTT ELLIOTT, a citizen of the United States, and a resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Sewing-Machine Fan Attachments, of which the following is a specification.

This invention consists of an improved contrivance of a sewing-machine rotary fan attachment for simple and efficient construction; also for detachable connection of the fan to the fly-wheel of the machine, and also for simple and ready adjustment of the fanwings for regulating the force of the blast, all as hereinafter fully described, reference being made to the accompanying drawings, in which- Figure 1 is a side view of part of a sewingmachine with my improved fan attachment applied. Fig. 2 is a section through the connecting-joint of one of the fan-wings with its supporting-arm on line as 0: in Fig. 4. Fig. 3 is an elevation of the fan, taken at right angles to the plane of Fig. 1; and Fig. 4, a face view of part of one of the fans enlarged.

For the base of the fan structure I make a ring a of wire, thin sheet metal, or other ap-- approved means suited for the purpose, preferring to employ four arms for four wings to each ring, the same being placed at equal distances apart; but I may of course employ more or less, as preferred, and I may make the arms of strips cut from sheet metal, if desired, though wire is probably the best.

For the fan-wings I prefer to use disks or any approximate or equivalent shapes of suitably stiff card-board or straw-board, and I connect them near the edge of one side or end, as the case may be, to the arms by means of an eye or ring a in the end of each arm, and a rivet f, preferably consisting of an eyelet with a broad and substantial washer g, each side of the fan-wing, making a friction pivotjoint adapted to hold it in position and on which the fan-win g may be turned, so that the radial range of the wings may be materially extended or contracted by shifting them on their pivots into different positions, as may be desired, for graduating the power of the aircurrents set in motion by the rotation of the fan. The eyes e of the supporting-arms preferably have their radial projection in planes oblique to the axis of the ring a, like the blades of a screw-propeller, for giving direction to the air set in motion.

It is to be noticed that I arrange the arms to project mainly in a lateral direction from the plane of the ring, which is for supporting the fans so far to one side of the ring that the ring may lie close to the side of the fly-weeel ring or to its arms without interference of the fly-wheel with the fans, the supportingpivots of which, being limited as to their radius by the table of the machine, are thus located so far away from the fiy-wheel that the fans clear the fiy-wheel even when shifted in their helical lines of adjustment to their greatest radial range.

For attaching the fan thus constructed to the sewing-machine wheel I), I employ elastic bands g, looped around the rim of said wheel and connecting with ring a by a hook h, attached to each band, using, say, four bands, which, being of uniform tension and placed like distances apart, center the fan relatively to the wheel and hold it sufficiently taut for practical use, and they afford very simple means of detachable connection for ready application and removal of the fan, as desired.

In this case I represent the elastic bands as connected around the rim of the fly-wheel; but they mayof course be connected to the arms of said wheel or to other parts suited for the purpose, according as said wheel may be constructed.

What I claim, and desire to secure by Letters Patent, is

1. The combination, in a rotary fan attachment for sewing-machines, of the base-ring a, wing-supporting arms (I, and the fan-wings c,

. eXtensibly connected to the arms by friction pivot-j oints adapted for variable radial proj ec- 7 tion of the wings, substantially as described. 2. In combination with the fly-wheel b of a sewing-machine, the rotary fan attachment having the ring a, the laterally-projecting fansupporting arms (Z, and the spirally-adjustable fans, and the elastic bands and hooks c011- necting said ring and fly-wheel, substantially as described.

3. The combination, in a rotary fan attachment for sewing-machines, of the base-ring a, fanWing-supporting arms d, attached to said ring, the ring" or eye at the outer extremity of IO each arm, and a fan-wing pivoted to each arm ford and State of Connecticut, this 14th day I 5 of May, A. D. 1888.

WALTER SCOTT ELLIOTT. \Vitnesses:

W. J. MCCONVILLE, J. H. PHILLIPS.

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