US316850A - thompson - Google Patents

Description

(No Model.) y Y. THOMPSON. MOTOR FOR SEWING MACHINES. No. 316,850. Patented Apr. 28, 1885.

. gin-- WITNESSES IIVVENTOR V 7 a: 6 Cl C V L. m E/ V v 3' a TENS. Phuwuuw m mr. Wnhinglom D. C.

MnLoHnsEDEoK YOUNG THOMPSON, OF ARKADELPHIA, 'ARKANsAs. l

MOTOR FOR SEWING-MACHINES."

" f SPEd IFIQATI01ifjr nfing partof Letters Patent No.316,850,dated Apri1 28, less.

Application filed November 25,1884. (No model.)

To all tuh o m, 'it mag concern I "Beit' known that I, MELOHESEDEOK YJ THOMPSON, a citizen of the United States, re-

sidi'ng'at Arkadelphia,'in the county of Clark and Stateof Arkansas, have invented certain new and useful'Iinprovements in Sewing-Machine Motors; and I do declare the following to bee full, clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or fig urs of reference marked thereon, which form a part of this specification.

Figure l of the drawings is a side view,part sectional, of my motor. Fig; 2is a front view. of the same. Fig. 3 is a vertical sectional view, and Figs. 4, 5, and 6 are detail views.

This invention relates to improvements in motor inechanism for sewing or other ma in the-construction and novel arrangement of parts hereinafter fully explained, and pointed out in the appended claims.

Reference being had to the accompanying drawings, and to the letters of reference marked thereon, A represents a' chair of strong con struction, having on its rear legs the casters a a,thesten1s of which are made longitudinally adjustable in recesses in the ends of the legs to raise or lower the chair to'different heights. I

j a a are pins or stems made longitudinally adjustable in recesses in the ends of the front legs for a similar purpose. I j

B is'an' oscillating shaft having bearings in the front ends of the side rails of the seatof the chair, and situated below and slightly forward of the front rail of the same. b is a hood, of metal or other proper substance, fitting partially over said shaft, with its upper or rear edge fixed to the seat of the'chair, and provided on its lower edge with the cut-away portions or recesses 12 b, as shown.

G C are levers depending from the shaft B, having their upper ends enlarged, rounded, and hollowed, so as to slip thereon, the said upper end being situated in two of the re 'cesses I; made for their accommodation.

L and forth by=the legs of the operator seated as shown.

in the chair.

a c are foot-rests, the stems 'c' of which pass into longitudinal recessesin the lower ends of 5 5 the levers O, and are made adjustable longitudinallytherein by proper holes and screws,

' Each of the levers C may, by means of its rounded head, be turned to any desired angle on the shaft B,and be fixed at that an.-

gle by a set-screw, o passing through the rear part of said head and bindingon the shaft.

The forward ends of the foot-rests are provided .with straps c to passover the'toes and aid inkeeping the feet in place. y

5 D is a hanging rod, having its upper end similar to those of the levers O, and fitting over the shaft B in one of the recesses 12, near oneside of the chair. The lower'end of the rod D is slotted longitudinally from front to 7:)

rear, andprovided with the holes d. chines operated by a treadle, and it consists (if is a pitman, the front end of which passes through the slot in the rod D, and is made vertically adjustable therein by means of the holes d and a proper screw, as shown.-' The 7 rearend'of the rod d is connected with the crank e' of the transverse shaft E, which has proper bearings in the side rounds connect; ing the chair-legs, and has fixed upon" it, out side of the crank, the gear-wheel c. 1'80 f is a geariwheel, about one-third of the diameterof the gear-wheel c, with which it meshes, and fixed upon the shaft F, which has bearings at one end in a bracket depending from'the side of the seat, and at the other in a bracketdepending from a rail fixed across the center-of the seat from front to rear.

f is a crank-arm secured to the inner end of the shaft F, inside of the bearing, and provided longitudinally with the holes f '90 G is a connecting-rod or pitman, therear' Jl end "of which is connected with and made vertically adjustable on the end of the crank-arm f by means of the holes f and a proper screw.

. Both the pitmen d and G maybe shortened on their respective cranks by the aid of perforations formed in their length, or in other usual manner. The front end of the pitman G is connected to the lower end of the hang- 10o ing rod H, which is in all respects similar to the rod D, being provided at its lower end with a similar slot, and having perforations h, similar to d, by means of which and a suitable screw the end of the pitman G is made vertically adjustable in the slot of the rod H, .the upper end of which is attached to the shaftB by a set-screw in a similar manner to the rod D.

I is a connecting-rod having its upper end pivoted upon the lower end of the rod H, and its lower end pivoted in the fork of a bracket firmly secured to the edge of the treadle J, as shown. The treadle J is connected in the ordinary manner to any machine which it is desired to operate.

.K K are metal straps provided with holes k, in which the pins a and the front lower ends of the brackets which form the bearings of the treadle J are inserted to keep the chair and machine at the required distance apart. The straps may, if desired, be hinged to the lower ends of the pins a and be turned up and secured against the legs of the chair when not in use. When the levers G are oscillated by the feet of the operator, themotion is conveyed by the swinging arm D, pitman d, and crank e to the gear-whee]. e, which imparts itto the gear-wheel f, and thence by the crank-arm f, pitman G, rod H, and connecting-rod I to the treadle J, the end of the rod I being adjusted higher or lower on the rod H to give the treadle a greater or less swing. Increased rapidity of motion of the treadle over that of the levers G is obtained by means of the gear-wheels c and f.- The levers O are in practice made to conform to the bend of the rear of the legs for comfort and convenience, and the foot-rests are adjusted thereon to suit the length of the legs; also, the said levers are adjusted at a convenient angle on the shaft B by their set- V Screws.

When it is not desired to use the gearing, the lever d is detached from the rod D and the crank c, and the lever G from the rod H and crank-arm-f. The treadle then swings in unison with the levers G, and greater or less swing is obtained by adjusting the rod I, by means of perforations made for that purpose and a proper setscrew, higher or lower upon the rod H.

In using the gearing the inner or upper end of the rod I may be attached directly to the crank-arm f, the pitman G being detached. The rod G then remains idle. The hood b prevents the shaft B from rubbing against the person of the operator when it oscillates, thereby causing friction.

L is a rod having its lower end squared, and fitting by a proper opening over either end of the shaft B,outside of the bearing of the same, the said end being squared for its reception. Z is afan attached to the upper end of said rod, and made vertically adjustable thereon by any proper means. As the shaft B oscillates, the rod L will vibrate and fan the operator. Having thus described my inventiomwhat I claim, and desire to secure by Letters Patent,

1, In the motor of a machine operated by a treadle, the combination, with a chair, A, for the operator,provided at its front with an oscillating transverse s'haft having hearings in the chair, and having attached the levers 0, provided with the adjustable foot-rests c, of

the swinging rodD, connected by thepitman.

d" to, the crank c of the shaft 13, the gearwheels 6 and f, the shaft F,provided with the crank-arm f,and the connecting-rod I,pivoted to said crank-arm and to the treadle J, sub

stantially as specified.

2. In a motor of a machine operated by a treadle, the combination, with the chair A,

oscillating shaft 13, andlevers G,provided with the foot-rests c, of the swinging rodH, conneoting-rod I, and treadle J, substantially as specified.

3. In a motor-machine operated by a treadle, the combination, with the chair A, shaft B, levers 0, provided with the foot'rests c, and swinging rods D and H, of the pitmen d and G, shafts Eand F, gear-wheels c and f, crank armf, connecting-rod I, and treadle J substantially as specified. t t t t 4. In a motor mechanism for a machine,the combination, with the chair A, oscillating shaft B, and vibrating levers O, of the fanning held at the desired distanceapart, substan= tially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

MELOHESEDECK YOUNG THOMPSON.

Witnesses:

W. W. HEARD, W. E. BARKMAN.

ICC

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