US1269769A - Hydraulic press. - Google Patents

Description

L. D. WHlTNEY.

HYDRAULIC PRESS.

APPLICAHON FILED ocT.3.1911.

l $69369 Patented June18, l9l8.

' 3 $HEET$-SHEET l.

IN VEN TOR.

A TTORNE Y5.

L. D. WHlTNEY.

HYDRAULIC PRESS.

APPLICATION FILED 0cT.3,19n.

WITNESS:

A TTORNE YS.

L. D. WHITNEY.

HYDRAULIC PRESS. APPLICATION men ocna. 1912.

Patented June 18, 1918.

3 SHEETS-SHEET 3- A TTOR NE YS.

LESLIE DENMAN WHITNEY, OF SAN MATEO, CALIFORNIA.

HYDRAULIC PRESS.

Specification of Letters Patent.

Patent-ea June is, rare.

Application filed October 3, 1917. Serial No. 194,634.

To all whom it may concern:

Be it known that I, LEsLIE DENMAN VVIIITNEY, a citizen of the United States, residing at San Mateo, in the county of San Mateo and State of California, have invented certain new and useful Improvements in Hydraulic Presses, of which the following is a specification.

My invention relates to the class of hy draulic presses especially adapted for compressing granular or finely comminuted material such, for example, as common salt, into small, hard bricks.

The object of my invention is, briefly stated, to save time both in the pressing of the brick and in its ejection from the pressure chamber.

To this end, my invention consists in the novel press which I shall hereinafter fully describe, by reference to the aecoi'npanying drawings, in which Figure 1 is a front elevation of my press, partly in section.

Fig. 2 is a side elevation of the same viewed from the left of Fig. 1.

Fig. 3 is a side elevation from the right of Fig. 1.

1 are frame-rods, upon which, at about their middle, is rigidly fixed the pressurechamber member 2, consisting of a plate with the chamber 3 in which the product is compressed.

Carried by the lower ends of the framerods 1 is the hydraulic-pressure cylinder 4:, in which operates the ram 5, through a gland packing at 6.

Upon the frame rods is slidably mounted the head 7, which head is slidably associated with the ram 5, by being telescopically capped upon it, as shown in Fig. 1. On this head 7 is mounted the plunger 8 which enters the pressure chamber 3 from below.

Upon the frame rods is also slidably mounted a head 9, which carries a plunger 10 which .passes into and out of the pressure chamber 3 from above. The head 9 is operated by means of a toggle lever 11, the lower member of which is secured to the head and the upper member is secured to a fixed cross head 12 of the frame.

The toggle lever 11 is alternately flexed and straightened by means of connecting rods 13, the outer ends of which are connected to the cross head 14 ofthe piston rod 15 of a steam cylinder 16, carried by a framebracket 17.

18, in Fig. 1, is an adjustable stop against whlch the toggle lever 11 is straightened.

On top of the frame is carried a steam cylinder 19, to the piston cross head 20 ofwhich are secured the upper ends of connecting rods 21, the lower ends of said rods being connected to the sliding head 7 which is associated with the ram of the hydraulicpressure cylinder.

Before indicating the steam and water connections, it will be well, at this point, to describe the operation of the machine.

Steam being admitted to the cylinder 16, the toggle lever 11 is flexed to the left, thereby lifting the head 9 and upper plunger 10, until said plunger leaves and fully exposes the top of the pressure chamber 3. Into this chamber the material is placed, and lies upon the lower plunger 8 which, at this time, forms the floor of the chamber.

Then steam being again admitted to the cylinder 16 to move its piston in the other direction, the toggle lever 11 is straightened out, with the effect of moving the plunger 11 down into the pressure chamber and upon the material therein. The pressure thus initially imposed is relatively rapid and is sufiicient to reduce the product to such density as may be initially required. This pressure, from the nature of the material, thus preliminarily and rapidly effects the reduction of the product in greater part. Thereupon, while said pressure is continued, water is admitted to the pressure cylinder 1, with the effect of raising the ram 5, the sliding head 7 and the plunger 8, the latter thus giving the final compression to the product. This final compression though relatively slow is strong enough to give to the product the required compression, which, in practice, reduces such material as salt to a clensity comparable to that of marble. \Vhen the toggle lever 11 is straightened out, it is locked against linear pressure and is suii'iciently strong to resist the great pressure of hydraulically operated plunger 8 in giving the final compression.

Now instead of using the relatively slowmoving hydraulic ram 5 to effect the ejection of the compressed product, I move the plunger 8 upwardly by independent and more rapid means, as follows:-

When the compression is complete, the upper plunger 10 is lifted by its steam cylinder connections, to clear the'pressure chamber; and then while the ram 5 slowly moves down, steam is admitted to the second cylinder 19 with the effect, through the connect ing rods 21, of rapidly. lifting the sliding head 7 and its plunger 8, said head sliding up on the ram 5. The plunger 8 thus passes rapidly up into the pressure chamber and ejects the compressed product. Thereupon the plunger 8 is returned to its initial position With its head 9 resting on the returned ram 5. Then fresh material is placed in the chamber 3 and the operations are repeated.

The operating connections here indicated are as follows 22 is the control lever for the hydraulic connections. This operates through a valve chamber 22 shown clearly in Fig. 3, and the pipes 28 and 2% connecting with the hydraulic cylinder 4. 25 and 26 in Figs. 2 and 3 are the steam pipes whichlead to a valve chamber 27, controlled by a lever 28; and from this valve chamber lead the pipes 29 and 30 to the ejection cylinder 19.

Branch pipes 31 and 32 from the steam pipes 25 and 26, lead to a valve chamber 33 controlled by a lever 3st; and from this valve chamber lead the pipes 35 and 36 to the steam cylinder 16, as seen in Fig. 2.

I claim v 1. A press comprising a member with a pressure chamber; a plunger operating in said chamber from one direction; steam pressure connections including a toggle lever for operating said plunger, to effect the initial pressure; a second plunger operating in said chamber from the opposite direction; and hydraulic pressure connections for operating said second plunger to effect the final pressure. j

2. A press comprising a member with a pressure chamber; a plunger operating in said chamber from one direction; hydraulic pressure connections to operate said plunger; a plunger movable into and out of said chamber from the opposite direction to compress the material therein from said direction, and to expose the chamber for the ejection of the compressed product and the supply of fresh material; and steam pressure connections for operating said last named plunger.

3. A press comprising a member with a pressure chamber; a plunger operating in said chamber from one direction; hydraulic pressure connections to operate said plunger; a plunger movable into and out of said chamber from the opposite direction to compress the material therein from said direction and toexpose thechamber for the ejection of the compressed product and the supply of fresh material; steam pressure connections for operating said last named plunger; means for ejecting the compressed Copies of this patent may be obtained for product; and steam controlled connections for operating said ejecting means.

et. A press comprising a member with a pressure chamber; a plunger movable into and out of said chamber from one side to effect the initial compression of the product and to expose the chamber for the ejection of the compressed product and the supply of fresh material; steam pressure connections to operate said plunger; a second plunger operating in said chamber from the opposite side, to effect the final compression of the product and to eject the same; hydraulic pressure connections to operate said second plunger to effect said final com 'n'ession; and steam controlled connections to operate said plunger on its ejection stroke.

5. A press comprising a member with a pressure chamber; a plunger movable into and out of said chamber from one side to effect the initial compression of the product and to expose the chamber for the ejection of the compressed product and the supply of fresh material; steam pressure connections to operate said plunger; a second plunger operating in said chamber from the opposite side, to efiect the final compression of the product and to eject the same; hydraulic pressure connections including a reciprocative ram longitudinally slidably associated with said plunger to operate said second plunger to effect said final compression; and steam controlled connections to operate said plunger on its ejection stroke.

6. A press comprising a pressure chamber member; a plunger operating therein from one side to eifect the initial compression of the product; a steam-cylinder having a piston with a rod; a toggle lever connection between said rod and plunger; a second plunger operating in the chamber from the opposite side, to efi'ect the final compression of the product; and hydraulic pressure connections to operate said second plunger.

7. A press comprising a pressure-ehamber member; means for efiecting the initial pressure of the product from one direction; a2 plunger for effecting the final pressure from the opposite direction; a hydraulically operated ram longitudinally slidably associated with said plunger; a steam cylinder, with piston connections; and rods from said connections to the plunger to move the latter to eject the compressed product.

In testimony whereof I have signed my name to this specification inv the presence of two subscribing witnesses.

LESLIE DENMAN WHITNEY.

Witnesses:

WM. F. BOOTH, D. B. Rrormnns.

Washington, I). G.

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