US320448A - Machine - Google Patents

Description

(ModeL) W E. TRULL.

BUTTON RULE SEWING MACHINE. N0. 320,448. Patented June 16, 1885.

UNITED STAT S PATENT .OFFICE.

WILLIAM E. TRULL, OF JERSEY CITY, NEW JERSEY.

BUTTON-HOLE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 320,448, dated June 16, 1885.

Application filed December 10, 1883. (Model) To all "whom it may concern Be it known that I, WILLIAM E. TRULL, a citizen of the United States, residing at Jersey City, in the county of Hudson and State ofNew Jersey, have invented certain new and useful Improvements in Button-Hole Sewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain novel and useful improvements in button-hole sewing attachments for sewing-machines, but is more especially designed as an improvement on the construction shown and described in Letters Patent No.2ll,932,granted February 4, 1879, to Samuel Rockwell, and No. 206,768, granted August 6, 1878, to Samuel J. Baird.

The object of my invention is to do away with the turret and the driving mechanism contained thereinsnch as is described and illustrated in said patents-and to provide means for effecting the oscillation and feeding exceedingly simple and actuated by the movement of the needle-bar, whereby the attachment is more readily adapted to any sewing machine; and with these ends in view my in vention consists in the details of construction and combination of elements hereinafter fully and in detail explained, and then specifically designated by the claims.

In order that those skilled in the art to which my invention appertains may understand more fully its construction and operation, I will proceed to describe the same, re ferring by letters to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a vertical longitudinal section showing the arrangement of the operatinglever within the casing and the means for adjustin g the same to regulate the sweep thereof 5 Fig. 2, a bottom view with the casing removed, and Fig. 3 a similar view with all the parts removed except the gearwheels and operating pawl and ratchet.

Similar letters denote like parts in the several figures of the drawings.

A is the main spur-gear or master wheel, which is on the same short shaft with a pinion, B, which meshes with the pinion 0, all of which are found in the Baird patent above mentioned. The masterwheel revolves a small pinion, D, and a camshaft, E, on which it is fastened, precisely as in said Baird patent.

It is not deemed necessary to show by the drawings and herein particularly describe all the parts of a complete attachment-snch as the horizontally oscillating or vibrating lever, the cloth-clamp or fabric-holder reciprocated in the front end thereof, the cam-frame and the devices for operating the same to shift it from one side to the other of the button-hole and secure its ends, and to give longitudinal movements tothe clotlrclamp-said parts being fully shown and described in the patents above referred to.

My improvement relates only to the mechanism for actuating what is styled in the Baird patent the master-wheel, and in this respect it is materially different from the H1llO"G- mentioned devices.

The side of the casing of the attachment is extended upward, as seen at F, (dotted line,) and to this is pivoted by means of a screw, G, a lever, H, and heel piece I. To this heelpiece is attached a small plate, J, by means of a screw, K, a coil'spring, L, being placed between said heel and plate, so that the latter has a slight spring movement laterally, as will be presently explained.

' O is a pinion secured on the short shaft 1? and meshing with the master-wheel A. Q is a ratchet-wheel arranged on the same shaft with the pinion O and within the field of action of the plate J, which acts as a pawl on said ratchet.

R are set-screws passed through lugs M on the lever, against opposite sides of the heel I, and by means of which the height of the lever H may be adjusted independent of the heelpiece, for the purpose of adaplin g the said lever in its normal position to different machines.

S is a set-screw by means of which the normal position of the heel-piece is varied, thereby increasing or decreasing the throw of the same, for the purpose presently explained.

The operation of my improvement is as follows: The extremity of the lever is attached to the reciprocating needle-bar of a sewingmachine. As the lever is operated, each upward movement of the same will cause the heel-piece to be thrown forward, and the pawl ratchet will have been turned around one' tooth, and the master-wheel and mechanisms in combination therewith \villhave performed their functions during said movement of the needle bar, in precisely the same manner and with the same results as they do in the Baird patent, at each complete revolution of the shaft of the sewing-machine.

The teeth of the ratchetwheel Q are so formed that when they have been-acted upon by the pawl J their backs will extend in a plane parallel and contiguous with the sideof said pawl, as seen at Fig. 3, so that there can be no movement whatever ot' the wheel when in this relative position.

The operation of the lever continues as the needlebar moves up and down, and the pawl J, as it moves backward out of contact with one tooth of the ratchet, springs inward, owing to the action of the coil-spring L, so that it will be within the vertical plane of the next tooth, so that it will operate on the latter, as in the case of the previous tooth.

The great advantages gained by my invention are, that I not only do away with the expensive and inconvenient turret, thereby greatly simplifying the construction, but also all the gears and operating parts in immediate relation therewith are in similar planes, and the transmitting of movement to the SGVBP'tl gears is of course accomplished with less pow er than where the gearingwheels are in different planes.

I do not wish to be limited to the exact shape of the lever shown or to any particular way of attaching or connecting the same to the needle-bar, as in these respects the application of my invention may be varied.

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

1. In a button-hole sewing attachment, the combination, with the master-wheel of a series of gears, such as shown, for actuating the oscillating and feeding mechanisms, of a ratchet and gear wheel mounted on the same short vertical shaft, and a pawl adapted to engage with said ratchet and attached to the lower extremity of a heel pivoted to an shaped. swinging lever, substantially as set forth.

2. In a button-hole sewing attachment, the combination, with the ratchet-wheel and gearwheel mounted on the same shaft, of the lever H, provided with adjustable means for controlling its oscillation, and having pivoted thereto the heel I, pawl J, secured to the heel, spring L, interposed between said heel and pawl, and the master-wheel of a series of gears, such as shown, for actuating theoscillating and feeding mechanisms, substantially as set forth.

3. The combination of the pivoted lever H, capable of being reeiprocated, heel I, pivoted to said lever, set-screws R, passed through lugs on said lever against opposite sides of said heel, pawl J, secured to the lower extremity of the heel, spring L, interposed between said pawl and heel, ratchet Q, adapted to be 7 actuated by said pawl and mounted on the same vertical short shaft with the pinion O, and the master-wheel of a series of gears, such as shown, for actuating the oscillating and feeding mechanisms. substantially as shown and described.

4. In a button-hole sewing attachment, the combination, of the lever H, having pivoted thereto the heel I, pawl J, secured to said heel, ratchet and gear wheels mounted on the same shaft and adapted to con'nnunicate motion to the master wheel, and set-screws R, passed through'lugs on said lever against opposite sides of said heel, whereby the normal height of the lever may be changed, substantially as described.

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

WILLIAM E. TEULL. \Vitnesses S. S. WILLIAMSON, W. T. HAVILAND.

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