US1555496A - Apparatus for oiling the cylinders and pistons in surfacing machines - Google Patents

Description

v E. ISAACSON Afr/mums won 01mins THE CYLINDERS AND PISTONS m suamcms mcumns Fild NEv. 10 1925 Patented Sept. 29, 1925.

.j UNlTED STATES EDWARD ISAAGSON, on ST. cLoUn, MINNESOTA.

PATENT OFFICE.

APPARATUS FOR OILIIiTG THE CYLINDER-s ANnrrs'roNs n sURrAoINe MACHINES; A

Application filed November 10, 1923. SerialNo. 674,018.

To all whom it may concern:

Be it known that I, EDWARD ISAACSO'N, a

citizen of the United States, residing at St. Cloud, in the county of Stearns and State of Minnesota, have invented certain new and useful Improvements in Apparatus for Oilingthe Cylinders and Pistons in Surfacing Machines, of which the following is aspecification. r

' This invention relates to apparatus for oiling the cylinder and piston in a surfacing machine and consists in the novel features andsteps hereinafter described and claimed. A surfacing machine is one usedfor raising and lowering large hammers at a rapid rate of speed and dropping them upon the surface of rock which it is desired to smooth. Such machines are used in granite and marble building and monument work for the purpose of getting the stone in a presentable and marketable shape. The machine is run by compressed air which is forced into a cylinder and allowed to escape at short intervals. As the air enters the cylinder it forces the piston which holds the hammer, in a downward direction. Considerable difficulty has been encountered in properly lubricating the cylinder and piston. Many machines have no oilers at all and others simply pour oil into a cylinder in large quantities which only lasts for a few minutes and disappears around the piston and escapes through the exhaust.

With this object in view the invention consists of a chamber adapted to retain the oil and which is fitted in the top of the cylinder. The chamber is provided at its top with an opening which is normally closed by a removable plug. A spider is located interiorly of the chamber and a needle valve is screwed therein. A coil spring is interposed between the spider and the head of the needle valve and serves to hold the valve at an adjusted position. At its lower end the chamber is provided with an oil outlet opening which is located opposite the pointed end of the needle valve. The air inlet and exhaust pipes communicate with. the chamber at points above the spider. A nipple is connected with the lower end of the chamber and is also connected with the cylinder of the surfacing machine hammer. A movable ball is retained in the nipple and normally rests upon an inturned seat provided at the lower end thereof and closes the passageway through the nipple. As the air enters the cylinder the ball is lifted from its seat and the oil drops into thecylinder and is administered to the parts. 'When; the air pressure is interrupted the ball falls to the seat and the flow of oil iscut off. i i

In the accompanying drawings- Figure 1 is a vertical sectional view ofia machine hammer with the. oiling chamber attached.

Figure 2 is an enlarged sectional view" of the oilchamber detached.

Figure 3 is a transverse sectionalview of thesame.

' Figure 4 is a plan view of the nipple. The machine to which the oiling system is applied comprises a cylinder 1' which-is mounted in a suitable frame 2." A piston 3 is slidably mounted in the cylinder ina usual manner. Amair pipe 4 connects with the upper part of the cylinderand an exhaust pipe 5 also connects with the upper part of the cylinder in a usual manner.

A nipple 6 is screwed in the top of the cylinder and is provided at its lower end with an inturned valve seat 7. A ball 8 is retained in the nipple and normally rests by gravity upon the seat 7 A cross bar 9 extends across the interior of the nipple at the upper portion thereof and serves to prevent the ball from passing out of the top of the nipple when the air pressure is on in the cylinder as will be hereinafter explained. A chamber or casing 10 is screwed upon the upper end of the nipple and is provided at its lower end with a reduced outlet opening 11 which is centrally disposed with relation to the nipple. A spider 12 is disposed transversely across the intermediate portion of the chamber and carries at its center an internally threaded annulus 13. A needle valve or pin 14 is provided between its ends with an enlarged portion 15 which is screw threaded in the annulus 13. The needle valve 14; is provided at its upper end with a head 17 which in turn is provided with a screw driver groove 17. A coil spring 18 is interposed between the spider and the head 16 of the needle valve and serves to hold the needle valve at an adjusted position with relation to the oil outlet opening 11 at the bottom of the chamber and after the valve has been set. The spring 18 is of general cone shape configuration in side elevation so that the coils thereof may nest within each other when the spring is compressed.

The chamber 10 is provided at its top with an opening 20 which is normally closed by a detachable plug 21, there being a leather washer 22 interposed between the head of the plug and the top of the chamber, in a usual manner. The plug is provided with a transversely disposed opening 23 through which a nail or other object may be passed when it is desired to turn the plug.

The operation of the device is as follows. The air under pressure enters the cylinder 1 through the pipe 4 and operates the piston 3 in the cylinder in a usual manner. At the same time the air pressure lifts the ball 8 from the seat and the oil, which is contained in the chamber and nipple, passes around the ball 8 and drops into the cylinder and upon the piston and lubricates the parts. When the air pressure is interrupted the ball 8 falls by gravity to the seat 7 and closes the passageway of the oil-through the nipple and hence the passing of the oil from the chamber and nipple to the interior of the cylinder is automatically interrupted.

By removing the plug 22 from the chamber, the end of a screw driver, not shown,

may be inserted in the groove 17 of the head 18-of the needle valve and the said valve may be adjusted so that its lower pointed end is disposed at a proper distance from the opening 11 and hence the quantity of the oil which flows from the chamber into the nipple may be regulated as required to effect the desired results in an economical manner.

Having described the invention what is claimed is 1 An oiler comprising a substantially elliptical chamberprovided at one end with a socket and at its opposite end with an opening, a plug closin'g'saidopening, a nipple screwed in the socket and having a seat and a cross bar spaced from the seat, a ball carried in the nipple between the seat and the cross bar, the end portion of the chamber having a needle valve seat which enters the socket, a spider located in the chamber, and a needle valve extending through and having a screw threaded engagement with the spider.

In testimony whereof I afiix my signature.

EDWARD ISAACSON.

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