US91132A - Improved glass-ware press - Google Patents

Description

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oHAHLES H. 4ruinsnv AND WALTER E. HAWES, or BOSTON, MASSACHUSETTS, ASSIeNoRS To THEMsELvES AND E. o. HERSEY, 0E SAME PLACE.

Leners Patent No. 91,132, ma Jane s, 1869.

AINIPIRO'VEID GLASS-WARE PRESS.

The Schedule referred to in these Letters Patent and making p'axt of the same.

To all 'whom 'it ma/y concern:

f declare that the following, taken in connection Vwith thedrawings which accompany and form part of this specification, isa description of our invention,

sufcient to enable those .skilledY in the art to praetise it.

In glass-ware presses, it is desirable to have the construction such that the' movement of the platen, or. presser toward the bed shall begin with a rapid motion, and shall terminate with a slow, but powerful movement, and it is also desirable that this movement shall-be effected by' meansk which will operate with so little friction and side-thrust that the press will' work sensitively, or so that the operator can determine, by feeling, the resistance oered just when thepressing-operation and movement should be discontinued.

Glass-ware presses have'been devised, and are in operation, lby which the force applied produces, at first, a quick, but not powerful movement, which gradually changes to a slow, powerful movement, completing the pressure under which glass-ware is formed in moulds; but in such presses, by reason of the in- 'troduction of gears, and other peculiarities of construction and arrangement,v so much power is absorbed in friction, and in overcoming side-strains, and in changing the direction of motion, that the `operator cannot feel, through the lever, when the plunger of the glass-ware mould has displaced the molten glass, vso as to cause it to iill all the vacant space in the mould.`

If pressure is continued on the mould after the space therein is filled with the molten, or hot, plastic glass, the result, as theglass is practicably incompressible, is to strain, and otherwise rapidly injure the mould, and also the qualit-y of the glass-ware produced therefrom, Such 4excess of' pressure giving to the glass-ware a crystalline formation.

Our. invention consists in the peculiar combination and arrangement of the parts, substantially as described, by which the moving-parts operate to give the platen, or presser a lmotion which changes from a rapid one, with smallforce, to `a slow, powerful movemeut, while leaving the press delicate and sensitive in its indication, through the lever, of the resistance offered to continued pressing-movement.

Figure 1, of the drawings, shows, in front elevation, and

Figure 2, in side elevation, a glass-ware press embodying our invention, the parts being shown in the position which th'ey have-previous to making a stroke or giving an impression, though in g. 2 is shown, in red lines, the position of the parts when the platen, or presser is broughtto its lowest position in making an impression.v

To the bed a, suitably supported at a convenient height, are attached0ne on each side, two uprights,

b, in the top and bottom ends of each of which are formed guide-ways, in which the ends of the crosshead c and cross-tail d can be made to reciprocate simultaneously, they being connected by links c.

Toggles, made by the links f and g, on eachside of the machine, are operated by movement of the rocker-lever h, connected to the toggles by the links Each link f of each toggle is pivoted to a xed pivot in each upright, b, and the lower link, g, of each toggle isconnected to the cross-tail d.

The rocker-'lever h is fixed upon the rocker-shaft k, which carries, at one end, a rocker-arm, l, one link being coupled to the rocker-lever h, and the other link i being coupled to the rocker-arm l, said links being connected, one to each toggle.

0n the inner siu'faoes of the upghts b are guide- Ways m, which guide the reciprocations given to the platen, or presser n, this being connected to the crosshead c by .the Screw o andnuts p, by which the platen can be adj usted. toward and from the bed, to suit various heights of moulds.

To.. counterbalauce the gravitation of the movingparts, and thereby increase the sensitiveness of the press, cords or chains q, having suitable weights Ir at one end, pass over wheels or* pulleys s, and are attached to the cross-head c.

It will bel obvious that the first part of the movement of the lever toward and by the operator will, at iirst, rapidly move the platen by straightening the toggles, and that the movement of the platen, proportionately to the movement-of the lever, will grow less and less in distance, and more and more powerful in effect as the toggles approach a straight line.

It is at the time when the toggles approach a straight line in the plane which passes through the axes of the links e, that the resistance to further movement of the platen is opposed by the filling of the space in the mould completely with glass. At this time, particularly, the operator can feel the resistance which indicates to him that he should cease to strain on the. lever, for, owing to the position of the toggles, which thrust directly down on the cross-tail which pulls through the links e in a direct line with tached, an arm may he fixed, for the purpose of carrying an adjustable counterpoise.

We claim, in a glass-ware press, the combination, with the cross-head, to which the platen is connected, of the links e, cross-tail d, toggles j' g, links li, and the rocker-lever, shaft, and arm, arranged and oper' ating as herein described.

OHAS. Hl HERSEY. WALTER E. HAWES.

Witnesses:

J. B. CnosBY, FRANCIS GOULD.

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