US773247A

US773247A - Glass-press.

Info

Publication number: US773247A
Application number: US7077401A
Authority: US
Inventors: Thomas Coleman Jr
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-08-03
Filing date: 1901-08-03
Publication date: 1904-10-25
Anticipated expiration: 1921-10-25

Description

T. COLEMAN,- J1.

I PATBNTED 00T. 25, 1904.

GLASS' PRESS.

.111110111011 rum) AUG. a. 1901. 4

No MODEL. '2 sanne-SHEET 1.

FIG. l.

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T. COLEMAN, JL

GLASS PRESS.

. h ArPLIo'ATIoH FILED AUG. s, 1901.

No MODEL. a MEETS-SHEET z.

FHS' El F154 WITIIISSES: INVENTOR i u I *l UNTTED STATES i Patented October 25, 1904.

y PATENT OFFICE.

GLASS-PRESS.

SPECIFICATION forming part of Letters Patent No. 773,247, dated October 25, 1904. Application filed August 3, 1901. Serial No. 70,774. (No model.)

To all whom t 71am/ concern,.-

Be it known that I, THOMAS COLEMAN, J r., a citizen of the United States, residing at Clarksburg, in the county of Harrison and State of l/Vest Virginia, have invented or discovered certain new and useful Improvements in Glass- Presses, of which improvements the following is a specification.

In pressing glassware it is desirable that the glass should at all times completely fill the mold, so as to produce perfect edges, and also that the glass should not be subjected to more than sufficient pressure to cause it to ll the mold, as otherwise the edges of the article will be crizzled or finely cracked by such eX- cess of pressure.

It is the object of the invention described herein to provide for the cutting off of `the active pressure on the glass so soon as the same has been caused to completely lill the mold. i

The invention is hereinafter more fully described and claimed. g

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of a glass-pressing mechanism having my improvements applied thereto. Fig. 2 is a diagrammatic view showing parts of the press and illustrating the circuitsv employed in one form or modification of my improvement. Fig. 3 is a sectional detail view of a form of controlling apparatus, and Fig. 4 is an elevation of a preferred form of switch employed in connection with the apparatus shown in Fig. 1.

For convenience I have shown my improvement embodied in the form of glass-pressing mechanism forming the subject-matter of Letters Patent No. 671,757, granted to me April 9, 1901. As therein shown,the pressing mechanism consists of a revoluble table 2, carrying the series of molds 1, a shaping-plunger secured to the lower end of a rod 35, attached to the cores of a pressing-solenoid 32 and a lifting-solenoid 33. The presser-plate 38, carrying the mold-ring 81, is connected to the upper ends of rods 40, whose lower ends are connected to or form the cores of solenoids 39, whereby the presser-plate and mold-rings are drawn down and held in position on the mold. As therein shown, the presser-plate is adapted to be lifted by means of a cross-head 36, connected to the plunger or rod 35, and provided with rods 37, which extend down through the presser-plate and have heads on their lower ends adapted to lift the presserplate when the plunger is raised. The table is adapted to be rotated by means of a solenoid 19, Whose circuit is controlled by the movement of the plunger, as fully set forth in the patent. referred to. A cut off mechanism adapted to sever the glass from the gatheringrod is arranged in suitable relation to the path of movement of the molds, such cutting mechanism being operated by means of a solenoid 29.. It is preferredthat means similar to that shown in the patent should be employed for lifting the article after being pressed from the mold, such means consisting of a movable bottom sectionfor the mold, having a downwardly-extending stem, which in a certain' predetermined position to the table or molds will be in line with the core of a solenoid 42, the circuit of such solenoid being controlled by switch 61, which in turn is controlled by the movement of the table. In order to stop the operation of the pressing-solenoid so soon as the glass has completely filled the mold, suitable means are employed to break or reduce the current through the circuitsA through the holding-solenoids 39 and the pressing-solenoid 32 so soon as the glass has been forced up against the mold-ring and exerted some pressure against the same, but not sufficient to effect any crizzling or injury to the glass.

The circuits for the press mechanism shown in Figs. 1 and 2 are as follows: The circuit for the pressing-plunger` starting from the generator A, consists of the Wire 82, rheostat or controller46, wire 83, manually-controlled switch 51, wire 84:,pressing-solenoid A32, and wire 85 to the generator. The circuit for the holding-down solenoids 39 consists of the wire 82, solenoids 39, switch 4:8, wire 86, automatic make-and-break mechanism, and

Wires

88 and 85 to the generator. This make-and-break mechanism is constructed in accordance with rules well known in the art, so, that when 'the load on the solenoidsgis abnormally increased the movable member of the switch will be forced out by the action of the current, thereby breaking the circuit. Such a form of IOO switch is shown in Fig. 4 and consists of the contacts 8O and 90, the latter being secured to a level` 91, which is held in place by a spring 92, whose tension is so adjusted as to hold the contact 9() between the contacts 89 until the load on the circuit reaches a predetermined point, whereupon the current will force the lever outwardly and break the circuit. As described in said patent. a rheostat 46 is arranged in the circuit of the pressing-solenoid, the contact-piece of the rheostat or controller being operated in one direction to remove resistances from the circuit by a spring 79 and in the opposite direction to throw in the resistances by a solenoid 66. The circuit of the solenoid consists of the wire 82, the solenoid, wire 93, contact-piece 94, an arm 95 on the lever 91, and wire 88 to the generator. It will be observed that the movable member 95 of this switch is adapted to be moved by the lever 91 when the same is forced outwardly by an increase in the load on the circuit of the solenoids 39, thereby closing the circuit through the solenoid 66 of the rheostat, whereby resistanees are forced into the circuit of the pressing-solenoid, thereby reducing the operative effect of such solenoid upon the glass. So soon as the switch mechanism controlling these circuits has been shifted the operator shifts treadle 54, openingswitch 51, therebyentirely breaking the circuit through the pressingsolenoid and closing the circuit through the lifting-solenoid 33. As the plunger reaches its upper position and is free of the mold an arm 70 thereon closes the switch 59 of the circuit through the table-shifting solenoid 19, so that the table is shifted, bringing a new mold into position under the plunger'. The upward movement of the plunger also shifts the lever 91 through the medium ofa projection, as the cross-head 36, forcing its contact-piece in between the contact-pieces 89, thereby closing at that point the circuit through the solenoids r1`his circuit, however, will remain open at the switch 48 until the table has been moved sufficiently far to bring a mold into proper pressing position. As soon as this position is attained the switch 48 is closed by a projection a on the table and the presser-plate drawn down by the solenoids 39. The operator then shifts the treadle 54, opening the circuit through the lifting-solenoid and closing it through the pressing-solenoid 32, whereby the plunger is forced down to shape the glass in the mold. By the movement of the lever 91 on the upward movement of the plunger the circuit through the rheostat-sclenoid 66 is broken, so that the spring 79 will shift the contact-piece of the rheostat so to remove all or part ofthe resistances from the circuit of the pressing-solenoid.

In lieu of controlling the circuit of the holding and pressing solenoids by an increase of load upon the solenoids due tothe upward pressure of glass the circuits of such solenoids l maybe controlled by a switch mechanism operated by the mold ring itself, as clearly shown in Fig. 3. A desirable form of such mechanism consists of contact-plates 96, arranged upon the presser-plate 38 and adapted to be shifted to open the circuit through the pressing-solenoid by the movement of the glass in the mold or by the mold-ring 81. The movement can be communicated to the contact-pieces 96 by means of a pin 97, adapted to be shifted by the movement of the moldring when the latter is lifted by the upward movement of the glass against the same. The mold-ring` is preferably held in suitable relation to the presser--plate by means of springs 98, which are so adjusted with regard to their tension as to withstand a certain pressure before permitting of the movement of the ring.

Thile having described and shown my in vention in connection with an electrically operated or controlled glass-pressing mechanism` it will be readily understood to those skilled in the art that the improvement can be applied to other forms of glass-pressing mechanism, and hence I do not limit myself as regards the broad terms of the claims to any particular form or construction of glass-pressing mechanism, but include as within the terms of the invention any suitable mechanical devices interposed between the power and the mold-ring or the glass within the mold, whereby the forming action of the pressing mechanism is controlled by the movement of the glass within the mold.

I claim herein as my invention- 1. A glass-press having in combination a pressing mechanism, a mold, and means operative by the upward movement of the glass in the mold to produce a gradual reduction of the forming action of the pressing mechanism on the glass, substantially as set forth.

2. A glass-press having in combination a pressing mechanism, a mold, a mold-ring and means operative by thc upward pressure of glass on the mold-ring to produce a gradual reduction of the forming action of the pressing mechanism, substantially as set forth.

3. A glass-press having in con'lbination a pressing mechanism, a mold and electricallyoperated means controlled by the upward movement of the glass in the mold to produce a gradual reduction of the forming1 action of the pressing mechanism,su bstantially as set forth.

4. A glass-press having in combination an electrically-operated pressing mechanism, a mold, a mold-ring, and means operated by upward pressure of glass on the mold-ring to produce a gradual reduction of the forming action of the pressing mechanism.

1n testimony whereof I have hereunto set my hand.

THOMAS COLEMAN, J R. Vitnesses:

HALLER H. Dawson, J Amis N. DAVID.