US262134A - Sewing-machine - Google Patents

Description

' (No Model.)

B. W. SCOTT.

SEWING MACHINE.

No. 262,134. Patented Aug. 1, 1882.,

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- UNITED STATES PATENT Garrett,

tOBERT W. SCOTT, OF PHILADELPHIA, PENNSYLVANIA.

SEWJNG-MACHlNE. f

SPECIFICATION forming part of Letters Patent No. 262,134, dated August 1, 1882.

Application filed April 15, 1882. (No model.)

To all whom it may concern Be it known that I, ROBERT IV. SCOTT, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Sewing-Machines, of which the following is a specification.

My invention consists of certain improvements, fully described hereinafter, in sewingmachines of the Willcox & Gibbs type, and in other sewingmaehines in which the guides for the needle-bar and presser-bar are of 1imited extent, and are consequently liable to be rapidly worn when the machine is driven at a high speed; and the objects of my invention are to afford longer guides and more extended guiding-surfaces for the needle and presser bar.

In the accompanying drawings, Figure 1 is a side view of sufficient ot' a Willcox & Gibbs sewing-machine to illustrate my invention; Fig. 2, a view of Fig. 1 looking in the direction of the arrow; Fig. 3, the same as Fig. 2, partly in section Fig. 4, a sectional plan on the line 1 2, Fig. 3; and Fig. 5, a perspective View, illustrating part of the machine.

In the Willcox & Gibbs sewing-machine the stationary arm A has at the outer end lateral projections a a, serving as guides for the needle-bar, and similar lateral projections a a, serving as guides for the presser-bar.

When machines of this class are driven at a high speed, which is generally the case in manufactories, both the presser-bar and needle-bar, and especially the latter, and the guides in which they reciprocate, become rapidly worn, owing to the limited guiding-surfaces within the projections to a, and the machine for this reason soon becomes so defective that it must be discarded or repaired. In order to remedy this defect, I use, in connection with the needle-bar D, a sleeve or tubular guide, B, which extends through the projections a a of the stationary arm, and is secured in any suitable manner to one or both of the said projections, the needle-bar fitting snugly but so as to reciprocate freely in the sleeve, which is carried upward above the highest of the projections to to about the extent shown in the drawings. While it is not necessary that the guiding-sleeve should extend entirely through the lower projection a of the stationary arm, I prefer that it should do so. By combining the sleeve with the needle-bar andstationary arm such an extended guiding surface is presented for the said bar 5 that the machine can operate along time without any appearance of the wearing, either of the bar or guide. The guiding-sleeve has a vertically-elongated slot to permit the free movement of the pin by which the end of the vibrating needle-lever G of the machine is connected to the needle-bar. The sleeve is also slotted at d to admit the thread-guide c on the needle-bar, and has an opening at fto admit the pin it of the tension device H to the groove in the needle-bar. These slots in the sleeves, however, do not detract from the extent of guiding-surface or durability of the sleeve. 7 In some cases the sleeve need not extend above the upper projection c, and in ma- 7o chines having a different form of tension device from that shown the opening fmay be dispensed with.

A guiding-sleeve, I, is combined with the presser-bar, and with the projections a a of 7 5 the stationary arm, the sleeve passing through the projections and being secured in any suitable manner to one or both of the same, and being vertically slotted where the usual guide rod, m, is connected to the presser-bar.

One of the advantages of my invention is the facility with which an old machine of this class, the ordinary guides of which have become worn, can be altered by the application of the guiding-sleeves, which render the machine more durable than a new machine as now manufactured, so far as the guiding of the needle-bar and presser-bar is concerned. The opening it in the vibrating needle-arm is made tapering, and larger on the outer than on the 0 inner side of the arm. (See dotted lines in Fig.3.) A ring, 1 having a curved periphery, is adapted to the opening win the needle-arm, and a threaded pin, .00, passes freely through this ring and screws into the needle-bar, the 5 head of the pin being contained,or partly contained, in a recess in the ring. NVhen this device is first made the ringydoes not extend far into the tapering opening 10 of the needlearm; but as the ring wears the screw is turned so as to cause the ring to pass farther into the opening, and this may be continued until the ring is so worn that farther setting up is out its rod or pin m, and the stationary arm and of the question,when theringmaybedisearded projections a a of the same, with the guidto make way for a new ring. ing-sleeve I, adapted to the said projections 15 I claim as my invention-- and slotted to admit the pin m, substantially 5 1. The combination of the stationary arm of as specified.

a sewing-machine and its projections a a, and In testimony whereot'Ihavc signed myname the needlebar and needle-arm, with the sleeve to this specification in the presence of two sub- B, applied to the said projections and slotted scribing Witnesses.

to permit the free movement of the pin which ROBT. SCOTT. 10 connects the needle-arm to the needle-bar, all \Vitnesses:

substantially as set forth. HARRY DRURY,

2. The combination of the presser-bar and 1 HARRY SMITH.

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