US202446A - Improvement in button-hole cutters - Google Patents

Description

F.' 0. IJEYPOLD'I'.l Button-Hole Gutter.

v No. 202,446. Patented Apri! 16,1878.

UNITED STATES PATENT O M ErcE.

FREDERICK C. LEYPOLDT, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN BUTTON-HOLE CUTTERS.

Specification forming part of Letters Patent No. 202,446, dated April 16, 1878; application filed I November 14, 1877.

To all "whom it may concern:

Be it known that I, FREDERICK C. LEY- POLDT, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Button-Hole Cutters, 85o.; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making a part of this specication.

My invention relates to certain novel improvements in button-hole cutters and analogous instruments. It has for its object simplicity and economy in construction, and great power of the cutting-blade. Vith these objects and ends in view, my invention consists of a button-hole cutter or other analogous instrument, having the lower or bifurcated jaw slotted vertically or transversely to the mouth of said jaw, and adapted to receive and guide the cutting-blade from pivot to point, as will be hereinafter more fully set forth.

My invention also consists in a novel cutting-block and the manner of its attachment, as will be hereinafter more fully set forth.

My present invention is designed to overcome some of the objectionable features found in button-hole cutters made according to Letters Patent granted to me on the 18th day of December, 1860, which, in some particulars, is of costly construction, but which, in the general features of construction, is substantially the same as my present invention. Reference is therefore made to said Letters Patent for full explanation of such like parts as may be found in both.

To enable others to make and use my improved button-hole cutters, I will proceed to describe the construction and operation of the saine, referring by letters to the accompanying drawing, in which- Figure l is a side elevation or plan view of a button-hole cutter embodying the features of my invention; Fig. 2, a similar view, with the lower jaw in section and the lever-handles broken off; Fig. 3, a perspective view of the cutting-block removed 5 and Figs. 4 and 5, plan views of modifications of my invention, showing its adaptability to wire and sheetmetal cutters, &c.

Similar letters indicate like parts in the several figures.

A represents the upper lever-handle for de-A pressing the knife, and B the lower lever and jaw, which is bifurcated in the usual way to admit the introduction of material to be operated upon. This jaw B is also transversely slotted at G to admit of the introduction and vibration of the cutting-blade D, which is pivoted at the rear end by a screw, E, so that it may be readily removed for sharpening, &c.

. \Vithin the slot C, at its rear end, is located a loose spring, F, which is held or coniined in place by the knife and check a after it has been secured in position. Gis a cutting-block, (seen in perspective at Fig. 3,) which is secured in place, as clearly seen at Figs. l and 2. The parallel surfaces or cutting-faces of said block are cut away, as seen at l 2 3, Fig. 3, such cut-away portions varying in length to produce varying cuts in material operated upon by the knife in an obvious manner. The two ends of the block G have grooves a b at right angles to each other, into which enter a short teat. or projection, c, and the thumbscrew g, by which the block is, when the screw is forced to position, held against displacement or movement, and the said block may be removed and readj usted to present any one of its four sides for the cutting-blade to act upon.

It will be readily seen that the cutting-blade or knife is free to vibrate Within its slot within the `jaw, and that, being forced down by the lever A upon the cam-face of said knife, the spring F is compressed, so that when pressure is removed the spring, forcing the knife D up, causes the lever A to be returned to its normal position. The knife is steadied and guided in its. movement by the slot, and a long circular movement or leverage is obtained by reason of its being pivoted in the rear.

The arm or rear extension of the knife may terminate at the pivot E, or it may extend beyond that point, as seen at Fig. 5, and be provided with a set-screw, H, to limit the movement of the lever A, and thus prevent injury to the cutting-edges of the knife or knives. As before stated, Figs. 4 and 5 represent more particularly the application of my invention to wire and sheet-metal cutters.

It will be seen that the slot provided for the vibrating knife is designed also to serve as a concealed cell for the reception of the spring F, which, by reason of its location and opera-f tion, may be a Cheap and operative two-arm spring, and out of the Way, and protected against displacement and injury.

I ain aware that punehes have been made with a vibrating cutter arranged Within a slot in the bifureated jaw, and having a tail eX- tended behind the pivot and beyond the slot,

e and operated upon by au externally-arranged spring. I do not therefore Wish to be underspring E, arranged in front of the pivot, and concealed in the slot, and lever A, all arranged to operate as and for the purposes set forth.

2. The cutting-block G, formed With intersecting grooves a b at either end, in combination with the teat G and thumb-screw g, substantially as and for the purpose set forth.

3. The knife D, extended rearward, and provided with a Aset-screw,H, operated upon by the lever A, substantially as and for the purpose set forth.

The foregoing speeicationlsigned by me this 9th day of November, A. D. 1877.

F. C. LEYPOLDT.

In presence of- HUGH FRANKLIN KENNEDY, EDWARD M. rHAs'rrNers.

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