US365057A

US365057A - Glazier s diamond-tool

Info

Publication number: US365057A
Authority: US
Publication date: 1887-06-21
Anticipated expiration: 1904-06-21

Description

(No Model.)

l A. T. DUNCAN.

GLAZIBBJS DIAMOND TOOL.

Patented June 21, 1887.

W l i f l m N PETERS. Phnm-Lnhogmpher. wnshmgmn D. C

ARTHUR THOMPSON DUNCAN, OF CLINTON, MISSOURI.

GLAZIERS DIAMOND-TOOL.

SPECIFICATION forming part of Letters Patent No. 365,057, dated .Tune 21, 1887.

Application ilcd February 26, 1587. Serial No. 2'29,0l0. (No model.)

To all whom it may concern,.-

Be it known that I, ARTHUR THOMPSON DUNCAN, a citizen of the United States, residing at Clinton, in the county of Henry and State of Missouri, have invented new and useful Improvements in Grlaziers7 DiamondTools, of which the following is a specification.

My invention relates to improvements in glaziers diamond-tools; and its objects are to set the diamond at any suitable longitudinal orlateral angle, and to hold it constantly at sald angle; to give the diamond different degrees of constant pressure upon the glass, so as to cut more or less deeply into the same; to cut plane surfaces as easily and accurately in curved lines as in straight lines, and curved surfaces as easily and accurately as plane surfaces, and to enable unskilled persons to eut glass into the required shapes as easily as those skilled in the art. These objects I attain by means ofthe construction and arrangement of a fra-me or handle and adjusting mechanism, hereinafter described, illustrated in the drawings, and pointed out in the claims hereto appended.

In the accompanying drawings, Figure l represents a perspective view of the complete device, showing the slotin the guide-plate and the diamond and holder therein. Fig. 2 represents a reversed plan view of the same. Flg. 3 represents a plan view of the guideplate and adjusting mechanism detached from the handle or frame. Figs. 4 and 5, respect1 ively, represent opposite side views ot' the same, the vertical portion of the guide-plate being cut away in the former view to show more clearly the mechanism. Fig. 6 represents a perspective view ofthe blocks holding the diamond and the means by which the same is rotated to different angles. Fig. 7 represents a detail View of the mechanism for giving the diamond different longitudinal angles. Fig. S represents a section on the line x .fr of Fig. 3, showing the mechanism for giving the diamond different lateral angles. Fig. 9 represents a section on the line y y of Fig. 3, to show the mechanism by which the pressure of the diamond on the glass is regulated.

Referring to the drawings, A designates the handle or frame, of block-like form, rounded on top to accommodate itself to the hand, and

suitably hollowed out to contain the adjusting mechanism.

B is the guideplate,secured to the handle by screws having their heads countersunk, and composed of the horizontal plate b andthe ver tical plate b, standing from one edge of the latter.

bt is a transverse slot running to the inner or guide side of the plate, and extending up into the vertical part thereof, for a purpose hereinafter explained.

The mechanism by means of which the diaA mond is adjusted is described as follows:

C is the diamond, secured in the lower end of the ordinary-shaped holder or block c,in the usual manner. The said holder has a recess in its upper end, into which is inserted a rod, d, upon which the block c can rotate, and can be fixed at any angle thereon by means of the set-screw c', which enters a threaded open ing in the side of the holder and impinges on the rod d. rIhe said rod stands outward, and then bends downward from the upper part of a plate, D, pivoted upon a plate, E, hereinafter described, and having on its upper edge the teeth d,arranged on an are concentric with its pivotal point. The plate E is provided with a curved slot, c, also concentric with the pivot-point ofthe plate D, and having passing through it from said plate a tapped or screw piu, cl2, by means of which and the nut d on said pin the plates D and E a-re held closely together.

e is a wornrshaft having bearings in lugs c2 on the upper edge of the plate E, and engag ing with the teeth d, so as to set the plate D, and consequently the diamond, at different angles longitudinally with regard to the handle.

The lower edge ot' the plate E is secured to the longitudinal arm fof a rectangular adj usting-piece, F, the end ofthe transverse armf of which is pivoted upon .the inner end of a longitudinal arm, g, of a transverse oscillating or rock shaft, G, which has bearings in the uprights h h, rising from the A[loorof the guideplate B.

fl is a tapped or screw pin, which extends outward from the angle of the adjusting-piece F, and passes through a slot, g', made in a transverse plate, g2, standing inward from near the end of the arm g, the said slot being on an lOO right h', and enters a corresponding recess in the other end of said shaft. A nut, h, engages the screw on the outside of the upright. These conical bearings are for the purpose of setting the described angles more accurately.

I is a strong spring having its inner end bifureated and pivoted to the lower end of a link, t', the upper end of which is pivoted at asuitable point upon a flattened part of the arm g of the shaft G. The outer end of the spring passes under a bracket, K, and a transverse retaining-bar, 7c, having its ends secu-red in the side plates of said bracket, and is bent upward, forming the arm t', which inelines outward from the bracket K.

7c is a regulating or adjusting screw, which passes through an opening in the arm i', and engages a threaded opening in the upper part of the transverse plate of thebracket K. The tendency of the spring k is to draw down the arm g, and consequently the diamond,with a certain degree of force. This force is increased by turning the screw 7c inward, because this action forces the arm t" toward the bracket K, and consequently forcesthe longitudinal arm of the spring downward. Thus the pressure of the diamond on the glass and the depth of its eut therein is regulated by the screw 7c.

Before the guide-plate and attached mechanism are secured to the handle,the block cis set on the 'rod d, and the longitudinal and lateral angles of the diamond are adj usted by the described means, so that the latter will cut to its best advantage on its natural angle, which is its only cutting-angle; but the pressure upon the glass can be regulated at any time so the head of the screw 7c projects through an opening in the handle.

In operation the horizontal part of the guideplate rests upon the glass lto be cut, being pressed down thereon so that the diamond can force itself into the glass, and in cutting straight, the vertical plate b is placed against and guided Y by a straight-edge or ruler placed in proper position. When cutting circular or oval lines, the said plate b is placed againsta guide-piece of similar form to the cutting desired and its edge inserted in the slot Z2 of the saine in such manner that it will rest against the edges of the slot. Thetool is then carried around the guide-piece, with the edges of the slot engaged thereon, until the circle or oval is complete. A circle can also be cut by tying a cord to the ends of the tool and a second cord to the center of the first and using the second cord as a radius; or any desired curve may be eut by putting a piece of paper marked with said curve below the glass to be eut and following the line with the tool. In cutting convex glass, like that in many show-cases,the said glass will enter the slot bl of the plate b, and the tool can be guided by the edges of the slot, as described, in cutting curves on plane surfaces.

- The device is drawn toward the operator when in use and not shoved like a plane.

The ends of the plate b,which extend beyond the handle, are provided with'athe notches or nicks Z Z, which glaziers use in separating the cut pieces of glass.

Havingdescribed my invention, I claim- 1. In a glaziers diamond-tool, the eombina-V tion of the'slotted guide-plate, the handle, and the diamond secured thereto so as to project through the slot in the guide-plate, substan-l tially as specified.

2. In a glaziers diamond-tool, the combination of the handle, the transversely-slotted' guide-plate secured to said'handle, the diamond secured to a suitable block so as to project through the lslot in the guide-plate, and means, substantially as described, whereby the diamond may be adj usted in position to cut to the best advantage on a natural angle, substana tialiy as specified.

3. In a glaziers diamond-tool, the combination of the handle, the transversely-slotted guide-plate, and mechanism, substantially as described, whereby the pressure ofthe diamond on the glass may be regulated to cause it to cut more or less depth therein, substantially as specified. l

4. rIhe combination, with the handle, the slotted guide-plate, and the diamond supported in the handle by means substantially as described, of the rod d, forming part of the supporting mechanism, the block c, holding the ICO diamond, and the set-screw c', substantially as Y and for the purpose specified.

5. The combination, with the handle, the slotted guide-plate, and the diamond supported in the handle by means substantially as described, of the plate E, provided with the curved slot e, the plate D, provided with the teeth d and screw-pin d2, and pivoted, as described, upon theplate E, the nut d, engaging the pin d2, and the Worm-shaft e', having bearings in the lugs e2, and engaging the teeth d, substantially as and for the purpose specified.

6. The combination, with the handle, the slotted guide-plate, and the diamond supported in the handle by means substantially as described, o'f the plate E,'the rectangular adjusting-piece F, provided with the screw-pin f2 and the nut g, the rock-shaft G, provided with the arm g, on which the piece F is pivoted, and the plate gprovided with the curved slot g', substantially as and for the purpose speciiied.

7. The combination, with the handle, the

handle both longitudinally and laterally and the pressure of the diamond on the glass can be regulated, substantially as specified.

In testimony that I claim the foregoing as my I5 own I have hereto afiixed my siguaturein presence of two witnesses.

ARTHUR THOMPSON DUNCAN.

Vitnesscs:

CHARLES B. W rLsoN, XV. S. DUNCAN.