US443760A - And thomas a - Google Patents

Description

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0 o e 'W. E. GINN & T. A. FORSYTH,

GRINDING ATTACHMENT FOR SBWINGMAUHINES.

No. 443,760. Patented Dec. 30, 1890.

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UNITED STATES PATENT Orrlcn.

WILLIAM E. GINN, OF BALTIMORE, MARYLAND, AND THOMAS A. FORSYTIT, OF VILMINGTON, DELAWARE.

GRlNDlNG ATTACHMENT FOR SEWING-MACHINES.

SFEGIFICATION forming part of Letters Patent No. 443,760, dated December 30, 1890. Application filed September 1, 1890. serial No. 363,597. (No model.)

To all whom it may concern.-

Be'it known that we, WILLIAM E. GINN, of )altimore, in the State of Maryland, and THOMAS A. FORSYTH, of Wilmington, county of New Castle, and State of Delaware, both citizens of the United States, have invented a new and useful Improvement in Grinding Attachments to Sewing-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification. 1 7

Our invention relates to the combination of an emery or grinding Wheel with the shaft or r 5 arbor of the bobbin-winder of a sewing-machine, under a compact arrangement permitting the closing of the case or cover of the machine over both bobbin-Winder and Wheel; and it consists in the combination, with the shaft or arbor of the bobbin-winder, of a grinding-wheel, the arrangement thereof to permit the cover of the machine to readily close over the bobbin-winder and wheel, in the manner of securing the grinding-wheel to the bobbin-winder shaft, and in certain details of arrangement of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a front elevation, in operative position, of a bobbin-winder for sewing-machines, with our improved grinding-wheel attachment applied. Fig. 2 is a plan view of the same, showing scissors applied for grinding. Fig. 3 is a plan view of the bobbin-winder shaft detached, 3 5 with the grinding-wheel thereon shown in section for showing the manner of attaching the latter; and Fig. 4- is an end view of the shaft, showing the grinding-wheel attachment in side elevation.

' 4o A indicates the bobbin-winder frame or a one of which forms a bearing for the bobbin-winder shaft B and the other a support for the spring-pin O for holding the bobbin in frictional contact with the adjacent inner end of the shaft B, said pin being applied 5 5 and operated in any usual or preferred manner. The outer end of the shaft B, extending beyond the bearing-sleeve has a pulleyD fast on it, through which it is adapted to receive motion from the sewing-machine band in the usual manner, and the shaft B, extending preferably slightly beyond the pulley, has a small grinding-wheel E secured upon its end by means of a tap-bolt or screw 6, the head 6 of which is preferably countersunk into the outer face of the wheel, as shown. The Wheel E may be secured to a hub on the pulley D, (indicated by dotted lines, Fig. 3,) instead of on an extension of the shaft, if desired.

The bobbin-winder frame or casting A has an outwardly-projectiug arm A formed upon or otherwise rigidly secured to it, said arm curving outward, as shown in Fig. 2, and extending to the plane of the outer face of the grinding-wheel E, at which end said arm has a curved guard F rigid on it and formed in an arc of a circle conforming to and lying in close proximity with the lowerhalf of the periphery of the wheel E and terminating at its outer or forward end in an inclined rest or table Gr, on which the scissors or other instrument to be ground is supported, in a manner indicated in Fig. 2.

The grinding-wheel E may be of emery, corundum, or any other material usual or suitable for the purpose, and, as shown, is secured to the shaft B in actual contact or in close proximityto the pulley D, preferably on a short extension of the shaft B, as ex- 0 plained.

By the construction and arrangement shown the bobbin-winder shaft is extended only just enough to receive and accommodate the grinding-wheel, which is small and of small thick- 9 5 ness, not sufficient to cause it to project. beyond the parts of the sewing-machine from which the bobbin-winder shaft receives its motion, and so will not in any way interfere with the closing over it of the cover ordi- I00 narily employed for shutting in the operative parts of the machine when not in use.

The pulley D, as shown, is of less diameter than the grinding-wheel, and the band for driving it will be embedded in its groove when in operation, and will consequently be out of the way of the scissors or other implement being ground. The same adjustment that is employed for the bobbin-winder sets the grinding-wheel in or out of action. The grinding-wheelis consequently out of the way and out of action when not in use, except as it is operated incidentally when a bobbin is being wound.

The outer exposed face orside of the grinding-wheel may be utilized for sharpening the needles of the machine and other purposes, as required.

The rest or table G for the support of the scissors or other implement to be ground is shown set at a suitable angle to the adjacent face of the wheel to give about the proper or usual level to the edge of the blade when placed thereon on its face side to be ground. This angle may of course be varied as the ideas of the manufactureroruser may dictate.

Having now described our invention, we claim as new and desire to secure by Letters Patent-- 1. An attachment to sewing-machines, consisting of a bobbin-winder frame A, provided with a rigid arm or'extension A andacnrvcd arm or grinding-wheel guard F, and the inclined rest or table on said arm, the whole being formed in one piece and provided with the twin lugs or ears for pivotally uniting the same to the sewing-machine, as and for the purpose described.

2. An attachment for sewing-machines, the same consisting of a bobbin-winder frame A, having an arm or extension A formed in one piece therewith, and a grinding-wheel guard F, integral with said arm A and the bobbin- Winder frame, an inclined table G, formed upon the end of said guard, in combination with the bobbin-winder shaft B, the grindingwheel E and band-pulley D, mounted thereon, and the twin lugs a forpivotally uniting said frame and its attachments to the frame of the sewing-machine, substantially as and for 50 the purpose described.

In testimony whereof we have hereunto set our hands.

WILLIAM E. GINN. TI-IOS. A. FORSYTII.

Witnesses for \V. E. Ginn: FRANK X. WARD, THOMAS R. DORSEY.

\Vitnesses for T. A. Forsyth:

.T. S. GEISENDOERFER, GEORGE W. PALMER.

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