US220052A - Improvement in feed mechanisms for sewing-machines - Google Patents

Description

2 sheets-sheet 1.

E. BOUSGAY. Feed Meehan-ism for Sewing-Machines.

No. 220,052. Patented Sept. 30,1879.

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N. PETERS, PHOTO LITHUGRAFHER 2 Sheets-Sheet 2'. YE. BOUSGAY. Feed-*Mechanism for Sewing-Machines.

No. 220,052. --Patented Sept. O, 1879. [im

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INVENTDH NPETERSI PkOTO-UTHDGRAPHER. WASHINGTON D C UNITED STATESPATENT Ont-ront ELOI BOUSCAY, OF NORWALK, OHIO, ASSIGNOR TO HIMSELF, M. D. WILLIAMS, AND N. S. C. PERKINS, OF SAME PLACE.

IMPROVEMENT IN FEED MECHANISMS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 220,052, dated September 30, 1879 application filed May 2s, 1879.

To all 'whom it may concern:

Be it known that I, ELOI BOUsCAY, of Norwalk, in the county of Huron and State of Ohio, have invented certain new and useful Improvements in Feed Mechanisms for Sewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable oth ers skilled in the art to which it pertains to make and use 1t, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to sewin g-machine feed mechanisms; and consists in the construction hereinafter described and claimed.

Referring to the drawings, Figure 1 is a. reverse perspective view of the bed-plate of a sewing-machine embodying my improvements. Fig. 2 is a view in side elevation of the same, with the bed-plate in section. Fig. 3 is an end elevation, showing the feed-bar and connections. Fig. 4 represents in two detail views the formation of the lower extremity of the main upright shaft and the engagement therewith of the rear extremity of the feed-operating lever.

The feed-operating lever A is provided at its rear extremity with the two lateral arms a, which embrace the eccentric b, formed on the main upright shaft B. The lower extremity of this shaft is further provided with a feed-cam, b1, which is adapted to engage a projection, b2, with which the rear extremity of the feedoperating lever is provided. The lateral arms of this lever are in constant and unvarying engagement with their operating-eccentric, and thereby the lever is actuated in its reciprocating longitudinal movement. The feed-cam engages the projection with which this lever is provided, and thereby said lever is actuated in its lateral vibration. As the rear extremity of said lever is adj usted laterally to or from the upright shaft, this projection is adapted to engage with a greater or less portion of said feed-cam, and the lateral vibrations of the lever are correspondingly varied. The forward extremity of this lever A is made with the incline c on its upper surface,which engages transversely with the feed-bar C as said vlever works in the cross-grooved, formed in the lower for- .central portion of the bed-plate.

ward portion of said feed-bar. The lower rear portion of this feed-bar is made with a longitudinal slot, f, which allows the bar to play on thehorizontal pivot g. Lugs or ears h, depending from the bed-plate, embrace the rear end of the feed-bar, and provide bearing for said transverse pivot- A spring, Z, is connected with the feed-bar, and the guideways m are also provided. The action or function of the several'parts is such as to cause the feed-bar to be actuated longitudinally in a combined horizontal and vertical movement under the operation of lever A. This lever is provided at or near its middle portion with a longitudinal slot, n, into which projects a pin, stud, or its equivalent, D. This pin or stud serves as a fulcrum on which said lever has pivotal movement in a horizontal plane. The adjusting device which moves this fulcrum or pivot in a general line transverse to the feed-operating lever consists of the feedadjusting lever E, whose forward extremity is pivoted to the bed-plate, so that said adjustin g-lever may be moved parallel with the latter.

Its rear extremity engages with the screwclamp F, which works in a vertical transverse slot, p, formed in the bed-plate GL By means ot' this clamp the free end ot'- the feed-adjusting lever may be secured at different points, so as to move the fulcrum D in a general line across the bed-plate, or at right angles to the length of the feed-operating lever A.

When a long stitch is to be sewed the clampscrew is thrown in toward the main upright shaft. This causes the fulcrum D to be moved in a general direction toward the longitudinal The rear end of the feed-operating lever is thus adjusted nearer to the feed-cam, and thelatter is thereby caused to actuate said lever in a more extended movement. The throw of the feed-bar is correspondingly increased, and the desired length of stitch is made. When a short stitch, however, is desired to be made, the screwclamp is moved outwardly,and a result or operation the reverse of than just described takes place. It is apparent that by this means the stitch may be quickly and easily regulated, as desired.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with an upright rotary shaft whose lower extremity is provided with a feed-cam and also with an independent eccentric, of a feed-operating lever whose rear extremity is provided with lateral arms which embrace said eccentric, and is further provided with a projection which engages with said feedcam, together with mechanism which is adapted to adjust the rear extremity of said Feed-operating lever to and from the upright shaft, substantially as set forth.

2. The combination, with an upright rotary shaft whose lower extremity is provided with a feed-cam and an independent eccentric, of a feedoperating lever whose rear extremity is provided with lateral arms which embrace said eccentric, and is also provided with a projection which engages with said feed-cam, together with a feed-adjusting lever connected to said feed-operating lever, and adapted to move the rear extremity of the latter to and from said upright shaft, substantially as set forth.

3. The combination, with an upright rotary shaft Whose lower extremity has a feed-cam and an independent eccentric, of n. feed-operating lever whose rear extremity has lateral arms which embrace said eccentric, andis also provided with a projection which engages with said feed-cam, together with a feed-adjusting lever pivoted to the bed-plate and a clamp which secures it thereto in position, said two levers being connected to one another and adapted to be moved so that said projection on the feed-operating lever engages with a greater or less portion of said feed-cam, substantially as set forth.

4. The combinatiomwith an upright rotary shaft Whose lower extremity has a feed-cam and an independent eccentric, of a feed-operat ing lever whose rear extremity has lateral arms which embrace said eccentric, and is also provided with a projection which engages with said feed-cam, together with a feed-adjustin g lever connected to the feed-operating lever and adapted to move the rear extremity of the seme to or from the upright shaft, the forward extremity of said feed-operating lever having an inclined upper surface which engages with the feed bar, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 13th day of May, 1879.

ELOI BOUSCAY. lVitnesses:

I. J. MAHON, S. N. PERKINS.

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