USRE12789E - Ornamenting glass - Google Patents

Description

No. 12,789. REIssUED MAY 5, 190s.

J. M. GONRQY. l QRNAMENTING GLASS.

PLIUATION FILED H1B. 17 190s. A? 4 SHEETS-SHEET 1.

REISSUED MAY 5, 1908.

' J. M. CONROY.l

ORNAMBNTING GLASS.

APPLICATION TILED FEB. 17, 1908.

4 SHEETS-SHEET 2.

WITNEssl-:s

MMM

No. 12,789. REISSUED MAY 5, 1908.

J. M. GNROY.

ORN AMENTING GLASS.

APPLIOATION FILED FEB. 17, 1908.

4 SHEETS-SHEET 3.

Z. Ww

No. 12,789. REISSUFD MAY 5, 1908.

J. M. GNRUY.

ORNAMENTI-NG GLASS.

APPLICATION FILED FEB. 17,1908.

4 SHEETS-SHEET 4.

FIG?.

wlTm-:ssss Y y JOHN M CONROY, OF- PITTSBURG, PENNSYLVANIA.

.i ORNAME NTING GLASS.

Specification of Reissued Letters Patent.

Original No. l723,139, dated March 1'7, 1903, Serial No. 128,222.4 Application fornressue led February 17, 1908..

, Serial NOQXGASIS.

To alli/)71cm it may concern: f

Be it known that I, JOHN M. Connor, a citizen of the United States, residing at Pittsburg, in the' county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Ornamenting Glass, of which improvements the following is a specification.

The invention described herein relates to certain improvements in the art of shaping or producing an ornamental effect on "the edges of glass articles, such as'rnirrors, Xcco, and has `for its object the breaking away of..

removal of portions of the edges, more especially with reference to the production of 1nclined scallops o1' in dentations along the edge of the article, said scallops being at an angle less than a right angle with the surfaces of the article.

. View of a form oi apparatus employed.

The invention is hereinafter more fully described and claimed. i

In the accompanying drawings, formin a part of this specification, Figure 1 is a an 1gure 2 is a sectiona elevation of the same. Figure 3 is a plan view of another form of apparatus. Figs. 4 and 5 are front and side elevations of the sa-me. Figure 6 is a sectional elevationl l Figure 7 is an elevation illustrating a modification in the shape of the drum, and Figure is a diagrammatic View illustrative ci the fracture of the glass.

.In the practice oi' my invention the glass is struck a sharp blowwith a suitable tool at a point closely adjacent to its edge, the direc- ..tion of impact being at an angle to the surface of the article. As the result of such a blow a piece oi glass is so broken out from theedge and opposite side oi the article as to leave a scallop extendin at an angle from the edge on which the llow is struck, yinc wardly toa point some distance from theopposite edge. A series of scallops can be formed in like manner adjacent to each other, the width of the scallops being dependent upon the distance between the points at which the blows are struck and the regular' 'ity ,of the spacing of the blows. I have found that by evenly spacing the oints of impact with the tool and making te blows uniform, orpractically so, as to force, the

pieces (f-'glass removed are quite'uniform in"y size and sha )e ,andthat there is very little splintering o the glass. Except at and adjacent to the point of impact of the tool no sharp points or 'cutting edges are formed` on duced by one pin .before being subjec thei article, although 'such sharp points or edges are found in the pieces of glass re moved.

A convenient form of apparatus-for orna-I inenting straight edges is shownI inI Figs. 1 and 2 and consists of a power-driven carrier or drum 1having a series of pins 2 projecting Jfrom its periphery, and a rest or support As shown, the pins are S0165 3 for' the glass. arranged as to strike successively on theI glass, 'as I havejound that the best results =are attained when an a preciable time lapses between succ'essive b ows. Such imroved results incident to the time spacing 7o ofthe blows are due, as I novi7 believe, to the opportunity afforded for the recovery of the glass from the-strains roduced by one blow -A before being subjecte to the nextjl As will be readily understood, the Vtime interval can be had by spacing the pins farther apart and increasingv the speed ofv the drum, or placing the pins nearer together and decreasing the speed of the drum. y

'and 2 I have shown my pre-` S0 In Figures 1 ferred form of constructionl oi mechanism for ornamenting-e`- g., scalloping articles having straight edges. The drum 1 is made with-A a width of face atleast equal to the lengthv of the edge Ato be operated on, and one or more y255 rows o pins 2 are secured in the periphery of the drum in such a manner that the ins Will strike successively on the article.A T e s acing of the pins around the periphery wi be dependent upon the eripheral speed of the drum, or the speed o rthe drum is regulated in accordance with the spacingbf the pins, vso

that an opportunity may be afforded for the recovery o the glass Jfrom the strains grothe action of another in. The diameter 017 width of the pins ank their s acing across the face of the drum is regu ated by the lwidth, of the scallop to be formedi. One or y more rows or'series of pins may be used if the 100 drum is rotated slowly, so that a4 number of edges may be operated on durin each 'revolution ofthe drum. The rest# ar 3 is ad'- justably mounted on the frame of the machine and arranged, referably, in suchrelasirable that the rest-bar should present a rm y'110 and uniform support for the glass to prevent 'breakage of the articles. The article is held Reissued May 5, 1908.'t

toes

, cle, as shown in Figures 2 and S.

by the operator in such' position that the pins Will strike on the aiticle.closely adjacent to the edge atan angle of about to the uper surface of the article, as clearly shown in igure' 2, and will move down and away from the article. In this movement the pin, which by preference should not striliev much more than one-tliirtyescconr'l of anvincli from the edge of the article, does not merely' nick the glass, but forces out a chip, the conoidal plane of fracture extending inwardly from the edge struck, at an angle of about fortylive degrees to the opposite faceof the arti- As before stated, the successive chips removed are substantially uniform in shape and size. In practice the operator presses the edge of the article against the periphery of the drum at the desired angle, the pins being set to project about a thirty-second of an inch from the4 eriphery. It is preferred that the ends `of tie pins be beveled, as shown, to form-a comparatively sharp striking edge and to permit the back edge of the pinto clear the edge of the article. The position of the bar or su port 3 depends u on the thickness of the g ass and shouldfor est results be so adjusted that the .line of support of the glass should coincide or be closely adjacent to the line Where the plane offfracture intersects the under surface of the Glass. v

As shown in Figure 7, .the periphery of the drum can be made to conform to the edge 'contour ofthe article; but itis preferred When operating `on `articles having curved edges to employ a construction[similar to that shown in Figures 3 to 6. As shown therein7 the drum is provided with a single in and the article is secured on a tablel or caring portion 4, which is shifted step by'y step to bring successive portions into the plane of movement of the pin 2. The table 4 is carried by a shaft 6, driven bythe shaft 7 through the bevel gears 8. A ratchetwheel 9 is secured to the shaft 7, and the l pawl 10 is mounted on the arm 11, pivotally mounted on theshaft 1.. forth A ,mcvement of the.

The back-andarm is cllected through the lilik 12 by an eccentric-pin 13,

.through the cross-bar- 17, vsecured to 'the frame of'the machine. ln order to`insure that the axis of the. plate 15 shall coincide witlrthe axis of the table -1, a disk ,18 is loosely mounted on the hubpf the clamping plate 15 and is provided with a downwardlyprojecting Hange 19, Whichwhen the plate is screwed down passes inside ofthe rim 2O on the bed 21, which supports the table `4,

as shown iii Figure 6.-

ln lieu of the construction shown in Figures 3 to 6 the periphery of the drum ma'Y be given a contour the reverse ofthat othe article, as shown in Figure 7, and provided with-pins spaced, as shQwn in Figures 1 and 2, with reference to successive action and arranged to impinge on the article,- at an angle of about forty-five degrees.

As the planes of fractureintersect the surface of the article at an approximately uniform distance from the ed e of the article, my improved methodimay e employed as a preliminary .step in bcveliiig the edges of glass plates, and the major portion of the glass required tobe removed to form the bevel can bec-hipped off very rapidly by iny method, so that the comparatively slow removal by grinding would be neccessarily pnlylfor straightening and smoothing the eve While l have shown withl some particularity preferred fornis o`f`-appara tus for carrying out my improved method, no claims are made herein to such specific or preferred .The fundamental improvement above de-' scribed is claimed in this application vgenerically, as follows:

A machine for chipping the edgesV of glass articles, comprising m conibinationa rest or support for said article and a carrier4 movable rcmtive tn said support and providcd with projecting mcans arranged to strike thc said glass an angular glancing blow at a point adjacent its edgc and in a direction 'away from the edge, substantially as described.

ln testimony whereof l. have hereunto signed niy name in the presence of the subscribed witnesses.

" JoiiN M. Connor- VVi'tnesscs: Pam. Sruivns'ivnn'r, J. C. BRADLEY.

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