US311407A

US311407A - barnard

Info

Publication number: US311407A
Authority: US
Publication date: 1885-01-27
Anticipated expiration: 1902-01-27

Description

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MEANS FOR CONVERTING RBGIPROGATING INTO ROTARY MOTION. No.- 311,407.

(No Model.) 2 SheetsSheet 2.

H. H. BARNARD.

MEANS FOR CONVERTING RBOIPROGATING INTO ROTARY MOTION No. 311,407. Patented Jan. 27, 1885;

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HENRY H. BABNARD, OF SYRACUSE, NEW YORK, ASSIGNOR OF ONE-HALF I TO JOHN D. GRAY,

OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 311,407, dated January 27, 1885.

Application filed December 13, 1884. (No model.) I

To aZZ whom it may concern.-

Be it known that I, HENRY H. BARNARD, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Means for Converting Reciprocating Motion into Intermittent Itotary Motion, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

The object of this invention is to provide simple, inexpensive, and effective means for v imparting positive intermittent rotary motion to the feed-wheels of sewing-machines, and to other wheels generally requiring such action.

The invention consists, essentially, in the combination, with a wheel and reciprocating mechanism for rotating said wheel, of a friction band or wire encircling the wheel or its hub, and arranged to alternately engage and release said wheel automatically with the movement of the reciprocating mechanism, all as hereinafter more specifically described, and

set forth in the claims.

In the accompanying drawings, Figure I is aside elevation of my invention as applied to the feed-wheel of a sewing-machine. Fig. II is a transverse section taken in a plane parallel to the plane of the wheel. Fig. III is a transverse section on line 00 x in Fig. I. Fig. 0 IV is an inverted face view of the clutch or lever by which motion is transmitted from the reciprocating rodtothewheel. Fig.Visanenlarged sectional detail view of the brake-wire and the II-shaped groove of the wheel-hub, in

3 5 which groove said wire lies. Fig. VI is a side View of my invention as applied for transmitting intermittent motion direct from the reciprocating rod to the wheel, and Fig. VII

is a transverse section of the same.

Similar letters of reference indicate corresponding parts.

In the operation of sewing-machines itis very essential to feed the article to be sewed under the needle of the machine with a very 4 5 accurate and properly-timed intermittent motion, and various devices-such as cams and friction-bearings-have been resorted to to hold the wheel dormant during the reversed motion of the reciprocating rod which transmits motion to said wheel; but said devices have proven unsatisfactory, owing either to the wear and abrasion, and consequent lost motion of said devices, or to their want of positive action and general deficiency in operation. To overcome these defects I employ 5 the following instrumentalities.

Referring to the annexed drawings, '1 represents the table of a sewing-machine, and TV the usual serrated feed-wheel,which by its intermittent motion carries the article to besewed under the needle of the machine, (the latter and its appurtenances varying in construction, and being so well understood by the pub he as not to require an illustration in this case.) The serrated periphery of the wheel WV projects through a slot in the table to engage the article to be sewed.

Underneath the table T the wheel W is provided with a hubflV, which projects from the side of the wheel, and is movably mounted in a supporting-ring, A, which encircles said hub, and is adjustably connected to the under side of the table in the usual and well-known manner. The outer circumferential face of the hub V, I provide with a circumferential groove, a, and in said groove I place a band or wire, I), one end of which I connect rigidly to the suprmrting-ring A, and the opposite end I connect to said ring yieldingly by means of a spring, 5, as illustrated in Fig. II of the drawings.

B represents a clutch or lever provided at one end with two lugs, e e, which loosely embrace portions of the inner and outer peripheral faces of the hub W, the ring A being pro vided with a slot, f, for the reception of the outer lug e. The opposite end of the lever B is connected with the rod It, which in turn is connected with a crank-arm, 9, attached to a rockshaft, IL. The rod B thus receives a reciprocating motion, which imparts an oscillatory motion to the lever B. The movement of the rod B toward the hub WV throws the lever B into such a position as to cause thelugs e 6 thereof to loose their hold on the hub of the 5 wheel W and allow the lever to slide part way around said hub. The movement of the rod in the opposite direction draws the lever B back, and thereby causes the lugs e e thereof to grip the hub and draw the same part way around.

' Itis to securely retain the wheel in its position after the last-described movement thereof, and during the reverse motion of the rod toward the hub W, and during the sliding motion of the lever B on said hub, which is the chief object of this invention, and this I accomplish most effectually and automatically by means of the brake band or wire 12 and its spring-connection with the supporting-ring A, the spring 8 being arranged in such relation to the movement of the wheel W as to allow the band or wire I) to yield to and liberate the hub WV when turned by the engagement of the lugs e e of the lever B during the movement of the latter in one direction. In moving the lever in the opposite direction the rigid attachment of the opposite end of the band or wire causes the same to bind so tightly on the hub Tas to effectually confine the wheel W in its position until the lever again swings back and grips the hub, and as soon as said lever exerts its power on the hub the spring 8 again releases-the same, thus producing a most positive intermittent rotary motion of the wheel WV.

Aside from the advantages derived from my invention, it will be observed that by the employment of the band or wire b,encompassing the hub W, I obviate unequal wear and abrasion of the parts in contact with each other, inasmuch as the frictional bearing of the band or wire is distributed over nearly the entire circumference of the wheel IV, and by using a round wire in connection with a V-shaped groove a, as best seen in Fig. V of the drawings, a still stronger frictional hold between said parts is obtained.

It is obvious that my invention is applicable for the purpose of transmitting intermittent motion to the wheel direct from the reciprocating rod by mounting on the periphery of the hub Wa slide, E, and connecting one end of the band or Wire b rigidly with said slide, and the other end yieldingly to the same by means of the spring 8, as'shown in Figs. VI and'VII of the drawings. The slide, being connected to the reciprocating rod R, moves back and forth on the hub, and causes the band or wire to alternately engageand release the wheel-hub NV. The momentum of the Wheel, together with the intermittent impulses received from the engagement of the band or wire during the movements of the slide E in one direction, produces a continuous rotary motion of the wheel.

Having described my invention,what Iclaim as new, and desire to secure by Letters Patent, is

1. As a means for imparting intermittent rotary motion to a wheel mounted loosely on its axial support, a clutch adapted to alternately engage and release the wheel, a reciprocating rod connected with said clutch, and a brake-band encircling the wheel, and having one end rigidly and the opposite end yieldingly attached to the axial support of the wheel, substantially as described and shown.

2. In combination with the feedwheel W, its axial support, and mechanism for imparting intermittent motion to said wheel,a brake band or wire encircling the feed-wheel, and

having one end rigidly attached to the axial support, and a spring connecting the opposite end of said band or wire with said axial support, substantially as and for the purpose set forth.

3. 'In combination with the supporting-ring A, the feed-wheel W, provided with the circumferential groove a, the band or wire I), lying in said groove and rigidly connected at one end to the ring A, and the spring 8, connecting the opposite end of the band or wire with the said ring, substantially as described and shown.

4. In combination with a wheel and reciprocating mechanism for rotating said wheel, a friction band or wire encircling the wheel or its hub, and arranged to alternately engage and release said wheel automatically with the movement of the reciprocating mechanism, substantially as set forth and shown.

' In testimony whereof I have hereunto signed my name and affixed my seal, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of ew York, this 22d day of November, 1884.

HENRY H. BARNARD. [L. s.]