US908343A - Self-oiling die-stock. - Google Patents

Description

W. M. & I. S. SHREVB.

SELF OILING DIE STOCK. APPLICATION FILED JUNE 13, 1907.

Patented Dec. 29, 1908.-

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rmiTnn sTaTTs raTnNT oTTTon SELBKOILING: :Dm-STOCK,

Spesoatan of Lettera Batentz Patented Dec; 539,v 1998 Application filed June-13, 1907. Serial No. 378,837.

T 0 allwho'm 'it may concern:

Be-it known that we, WALTER M. SHREVE and IsAAc S. SHREVE, citizens of the United States, residing in Philadehhia, Pennsylvania, have invented certain in Self-Oiling Die-Stocks, of which the iol'- mprovements lowing is a specification.

Our invention relates to that class of die stocks 'which are Aprovided with a hollow handle constituting a reservoir for the oil which is employed for lubricating the dies or for application to the rodl or tube at the point where the dies begin to act upon the saine, the object of our invention being to insure the proper liow of oil from the reservoir to the dies. This object we attain in the manner hereinafter set forth, reference being had to the accompanying drawing, in which- Figure 1 is a sectional view of suilicient of a die stock to illustrate the means em-l ployed for conveying the oil from the hollow andle to the dies, and Fig. 2 is an enlarged section of said hollow handle as constructed in accordance with our invention.

In Fig. 1 of the drawing, 1 represents the body of a die stock, which may be of any ordinary character, and provided with suitable cutting dies 2. Screwed into suitable bosses on the body of the stock are the handles 3 and 4, whereby the same is turned, the handle 3, in the present instance, cony stituting a reservoir for the oil which is employed for lubricating the dies, the oil being conveyed from the handle to a point in'ad.

vance of the dies by means 'of a passage 5 and a'short tube 6, screwed into the threaded end of said passage. The handle 3 consists of a tube having at its lower end a tubular plug 7, whose under face constitutes a seat for a valve 9, the stem 10 of saidvalve passing up through the plug and haiving, at the top, a disk 11 between which and a seat in the plug is interposed a coiled spring 12, whereby the valve 9 is normally maintained in close contact with its seat and the escape of oil from the handle is revented. Screwed into the upper end of tile tube 3 is a cylinder 13 containing a piston which is provided with acupleather packin 14, the rod 15 of said piston passing throug a stuffing box at the upper end of the cyllnder and being provided at its upper end with a knob or button 16, between which and the cap of the stuffing box is introduced a coiled spring 17 tending to raise the piston in the cylinder 13, a protecting tube 19 constituting the outer end ofl the handle 3 and serving; to inclose the projecting portion of thepiston rod, its knob,

and spring, and thereby prevent depression of the piston by accidental blows upon the knob.' The piston.. rod 15 hasv a depending stem 20 which may, if desired,be connected to the valve stem 10 but which preferably terminates, at its lower end, in a yoke or bow 21, this bow, when the piston is in. itsv highest position in the cylinder being disposed at any desired' distance above the disk 11 at the top of the valve stem 10..'

Normally, the parts occupy the position shown in Fig, 2, the valve 9 being closed and escape of oil from the hollow handle being thereby prevented. Pressure of the thumb or finger upon the knob or button 16, however, will cause downward movement of the piston in the cylinder 13, and the cu eather packing of said piston will fit snugl) to the walls of the cylinder so as to prev'ent any leakage of air past the piston, consequently the body of air which is contained between the piston and the upper surface of the body of oil in the handle will be comressed to a certain extent, and when the bowl 21 iinally contacts with the disk 11 and depresses the latter so as to o en the valve 9, lthis pressure of air behind t e body of oil containedv in the handle will insure the discharge of a jet of oil between the valve and its seat, the piston being raised by the action of the s ring 17 as soon as pressure is removed rom the knob 16,- and the valve 9 being likewise raised by its s ring 12 as soon as the pressure of the bow 21 1s removed from the disk 11 as said bow 21 rises with the piston.

We claim 1. The'combination of a die stock ,with a hollow handle constituting'v an oil reservoir and having a valved opening at its inner end, a tightly fitting piston in the handle, means for normallyy closing the valve, and a connection between the valve and piston whereby said valve -will be o ened independently of the pressure of the oi thereupon when the piston is depressed.

2. The combination of a die stock with a hollowhandle constituting an oil reservoir and pressing said piston.

3. The combination of a die stock with a hollow handle constituting an oil reservoir and having a valved opening at its inner end, means for normally closing said valve, a piston contained in the handle, and'rneans, normally free from connection with the valve, for imparting movement of said piston to the valve independently of the pressure of the oil thereupon.

4. The combination of a die stock with a hollow handleconstituting an oil reservoir, a valve closing the inner end of said handle and having a stem with disk and spring acting thereupon to normally close the-valve, a tightly itting piston contained in the handle, and a rod depending from said piston, and serving, by Contact with the valve-stem disk, to open the valve.

5. The combination of a die stock with a hollow handle constituting an oil reservoir j eoting therefrom, a knob or button on said rod, a spring for raising the same, and a protecting tube surrounding. the button but open at the outer end to permit access to the same.

6. The combination of a die stock with a hollow handle constituting an oil reservoir, a springpressed valve normally closing the inner en of the handle, a spring-raised piston in the handle, and means normally free from connection with the valve whereby inward movement of the piston will effect opening movement of the valve independently of the pressure of the oil thereupon.

ln testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

'WALTER M. SHREVE. ISAAC S. SHREVE.

Witnesses:

FLEETwooD FULMER, ELMER E. E. SHIELDs.

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