US767310A - Glass-pressing mechanism. - Google Patents

Description

NO MODEL.

PATENTED AUG. 9, 1904. F. O'NEILL.

GLASS PRESSING MECHANISM.

KPPLIOATION FILED AUG. 3, 190a.

wnnr 11111111.

I INVENT'DR UNiTEn STaTEs Patented August 9, 1904.

PATENT OEETEE.

FRANK ONEILL, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO DAVID A. GORDON, OF IVALLAOEBURG, CANADA.

GLASS-PRESSENG MECHANISM.

1 SPECIFICATION forming part of Letters Patent No. '76? ,310, dated August 9, 1904.

Application 5125. August 3, 1903.

To (all whom, it 77Lf!/ 7/ concern.-

Be it known that I, FRANK ONEILL, a citizen of the United States, residing at Detroit, in the county of \Vayne and State of l\ Iichigan, have invented certain new and useful Improvements in Glass-Pressing Mechanism, of which the following is a specification, reference being had therein to theaccompanying drawings.

Glass-pressing machines operated by other than hand-power are usually provided with means for affording a yielding pressing stroke to compensate for variations in charges of glass placed in the mold. As the mold-cover or spring-plate mechanism is carried by the plunger it yields therewith, and hence is less effect- -ive in confining the glass within the mold in case of an overcharge than with a right amount. IV hen the excess is not too great, it should be so confined as to prevent overflow or oozing from the mold-top when the pressure is applied, the plunger in such case stopping short of a full stroke and leaving the article with a thick bottom, but otherwise perfect.

The primary object of the present invention is to provide improved means for relieving the mold-cover of the compensating or yielding movement of the plunger, whereby the same is so confined as to prevent overfiow and the consequent formation of an article with an imperfect upper end, as is the case whenever the cover is forced from the mold during the pressing operation.

I have illustrated the invention in connec tion with portions of the pressing mechanism shown in my Patent No. 674E248, May 1 1, 1901.

In the accompanying drawings, Figure 1 is a side elevation, and Fig. 2 a front view, partly in section, of pressing mechanism embodying the improvements. Fig. 3 is a vertical sectional view, on a larger scale, of the plunger mechanism and actuating means. Fig. 1 is a detail view of one of the spring-depressing bars.

Referring to the drawings, 2 designates the parallel uprights of the machine-frame, which are slotted vertically at 3 to provide ways for the plunger-shaft 1 and plunger-depressing cross-head 5. The latteris operated by crankarms 6, extending from cams 7,- secured to Serial 110. 168,008. (No model.)

shaft 8 at the base of the machine, while the 5 plunger-shaft is operated by bars 9, provided with rollers 10. which ride on cams 7, all as fully described in my patent above referred to. Gear 11 and sliding rack 12 operate to shift the plungers, also as fully described in said 5 5 patent.

Secured on shaft 1 is head 13, and projecting radially therefrom are arms 14, carrying at their outer ends plunger-heads 15.

16 represents the cup-shaped mold-covers, which closely fit and are movable over the inner ends of the plungers, being held normally projected by springs 17, coiled around arms 14:.

The inner ends of the springs bear against plates 18, which slide on the said arms.

In the present adaptation of the invention two plungers aline through shaft 4, as in my patent above referred to, so that when one plunger is projected downward in operative position another plunger is upright and in line with socket 19 on the lower end of rod 20, depending from cross-head 5, whereby the operative plunger is forced downward for the pressing stroke. Rod 20 is movable through crosshead 5 and is reduced at its upper end at 20, the extremity of this reduced portion being movable through plate 21, secured to crosshead 5 by rods 22. A plate 23 rests on the shoulder of rod 20, formed by reduced portion 20, and confined between this plate and plate 21 are springs 24. IVith this mechanism it will be understood that the depressing means may be adjusted to afford a yielding or compensating pressing stroke to the operative plunger after the same encounters a given or 8 5 predetermined resistance occasioned by an excess of glass in mold 25.

In order to hold mold-cover16 tightlyseated on the mold and prevent it from yielding With the plunger,I provide two bars 26 positioned 9 on the inner sides of frame-uprights 2, and at their upper ends provided with lateral projections 27, which are confined in slots 3 and which are positively engaged by and move with cross-head 5. The lower portions of these bars are enlarged and formed with oblong openings 28 to loosely embrace the reduced end portions 13 of head 13. On the inner sides of the lower extremities of the 1 position spring-plate 18 thereof is positioned beneath and positively engaged by said bar pro ections. Thus a positive connection 1s had between the spring of the moldcover and depressing cross-head 5, so that even though the plunger yields slightly and stops short of a full pressing stroke, as shown in Fig. 3, the mold-cover spring is held in the position it would have if the stroke were full. Thus the mold-cover is most positively and strongly held just at the moment the unseating pressure of the glass within the mold is greatest. Escape of the molten glass is thus prevented, and the article is pressed with a perfect upper end.

\Vhile the invention is here shown and described in connection with my patented pressing mechanism, it will be understood that the same may be applied to various forms of glasspressing machines without departingfrom the spirit or scope of the invention.

I claim as my invention--- 1. In a glass-pressingmachine, a verticallyreciprocating and revoluble plunger, actuating means having yielding connection with the plunger for reciprocating it, mold-cover mechanism constructed and arranged to cooperate with the revoluble plunger when thelatter is in operative position, and means for positively reciprocating the mold-cover mechanism.

2. In a glass-pressing machine, a verticallyreciprocating and revoluble plunger, actuating means having yielding connection with the plunger for actuating it,moldcover mechanism revolublc with the plunger and adapt ed to reciprocate independently thereof, and means for positively reciprocating said mechanism.

3. In a-glass-pressing machine, averticallyreciprocating and revoluble plunger, moldcover mechanism revoluble With the plunger and adapted to reciprocate independently thereof, and actuating means common to the plunger and said mechanism for reciprocating them and adapted to yieldingly connect with the plunger and positively connect with the mold-cover mechanism.

4L. In a glass-pressing machine, a rotatable and vertically-movable plunger-carrying head, plungers projecting therefrom, a depressing-head adapted to impart a yielding downward movement to the plunger-carrying head, bars at opposite sides of the latter and movable independently thereof and adapted to be depressed by the depressing-head, a moldcover movable over each plunger, a spring for holding each cover normally projected, and means whereby as each spring is brought to pressing position it is engaged by said bars.

5. In a glass-pressing machine, a rotatable and vertically-movable plLinger-carrying head, plungers projecting therefrom, a depressing-head adapted to impart a yielding downward movement to the plunger-carrying head, bars at opposite sides of the latter and movable independently thereof and adapted to be depressed by the depressing-head, projections on the inner sides of the bars, a moldcover movable over each plunger. a spring for holding each cover normally projected, and a plate carried by each spring adapted to be engaged by the said bar projections when the corresponding plunger is in pressing position.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK ONEILL.

l/Vitnesses:

GUY C. NEARING, LINNIE MoRRIsoN.

Images