US542957A - Half to william g - Google Patents

Description

` (No Model.)

W. J. FERGUSON,

LUBRIGATOR..

Patented July 16,1895.

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CAQ/Zw UNITED STATES PATENT OFFICE.

WILLIAM J. FERGUSON, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE- HALF TO WILLIAM G. H. STUMP,'OF SAME PLACE.

LUBRICATOR.

lsrnornrcn'rro1t forming part of Letters Patent No. 542,957, dated ,July 16,1895. Application led April 11, 1895. Serial No. 545.356. (No model.)

'To all whom t may concern,.-

Be it known that I, WILLIAM J. FERGUSON, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Lubricators, of which the following is a specification.

This invention relates to an improvement in lubricators of that type in which a springpressed plunger is employed within the lubricant-receptacle to force the oil or grease therefrom.

The object is to provide a lubricator of the class described having certain improved construction of parts, as will be hereinafter described and set forth in the appended claim.

In the accompanying drawings, illustrating the invention, Figure l is a side elevation of the lubricator. Fig. 2 is a central vertical section of the sa'ne. Fig. 3 is a vertical section of the cap 'and spring-pressed plunger as seen when detached. Fig. 4 is a top or plan View of the lubricator with the plungerstem above the top in cross-section.` Fig. 5 is a bottom view of the outlet screw-plug. Fig.` 6 shows two views ofthe valve-locking parts;

In the accompanying drawings, A designates the cylindric cup or receptacle to contain the grease or oil lubricant, provided at its lower end with an exteriorly screw-threaded nipple or boss B, through which extends the outlet-passage b. This boss has a bore c, which extends crosswise'of the said outletpassage b, and a plug-valve d ts snugly in the bore and has a port d', and controls the passage of the lubricant through the outletpassage. By this construction and arrangement the valve has three operative positions; iirst, one in which its port d is fully coincident with the outlet-passage b, and said passage is full open to its fullest capacity for outflow of the lubricant; second, another in which the port o7. is partially coincident with the outlet-passage, so as to partially cut off the flow of the lubricant, and, third, another in which the valve-stem is turned so that its port d will be closed and will entirely cut off the flow of lubricant through the outletpassage. A locking device to hold the valve at each of said three positions is provided.

The valve-stem has at its free end a rigid arm or projection e, which has a slot e', and a plate-spring f is confined by a screw ff and has a pointed prong or detent f2, which projects through the said slot e and engages one of three holes g' g2 g3 on a flat extension h on the side of the cup, arranged in an arc which is concentric with the axis of said valve-stern. Thus when the valve-stem d is turned to either one ofthe aforesaid three positions it will be held by thedetent f2 engaging the desired hole. v

The grease cup or receptacleA is closed at its top by a cap J, the pendent flange J of which takes around the exterior side of the cup, and has an angle-slot j to engage with a pin j on the cup., One or more ofthe slots and pins may be used. Thus the cap is secured, as will be readily understood. The

cap has'on top a crown-piece or boss lc prov vided with an elongated opening 7c through 'which the plunger-stemiL extends loosely.

This stem is provided at-its upper end with a suitable handle for conveniencein manipulating the device, and at its lower end the stem is secured to the plunger L. The stem thus moves loosely through the cap and may be turned slightly without moving the plunger. The upper portion of the plunger-stem is flat or oval-shaped, as at m, corresponding to the shape of the opening k in the cap, while the lower portion m is round. Where the oval part and round part join is an annular shoulder n, the function of which will be hereinafter stated. A helical compressionspring O surrounds the plunger-stem and bears against the plunger L and forces the latter down. The top end of the spring is held by an annular rim p on the cap projecting into the spring, and the lowel` end of the spring is seated in a groove q on the top surface of the plunger. The face of the plunger is rounded or convex, as at o, to fit close against the concaved bottom o of the grease-cup. Thus the plunger can expel all the grease from the cup.

In order to apply the cap Jand plunger L to the receptacle A it is necessary to first compress the spring and hold it in a compressed condition. The spring is rst com'- pressed by forcing the cap down on the stem IOO ' the plunger yon the grease.y

by first engaging the vertical portion ofy its f angle-slotj with the pin j', and then turning they cap to bring the saidpininto thehori-y zontal part of the slot. This being done the' steminay then ybe given a quartenturn to release the shoulder lm and allow thefstem to move loosely through the crown-opening 7o. This release of the device which holds the spring compressed allows the spring to force f the plunger down upon the lubricant in the cup. By this construction and arrangement of the parts follows the lubricant as the latter feeds out throughout the passage b and exerts a oonstant pressure upon the saule as ylong as 'any lubricant remains in the cup.

' rlhe'plunger-stem'L has a longitudinal passage r through it for the admission of air to ytheeup during the time of withdrawing the plunger, andl ai ball-.valve s closes said passage during the time the spring is ypressing The ball-valve occupies a socket t ,ini the plunger, which is olosed by a screw-plug u, having an elongated passage 7". The sookethas a valve-seat r2 at the lower end of the passage o, which closes tight when the ball-valve s is in position shown in Fig. 2 and entirely closes the up- The valve cannot, however,

Ward passage r. seat closely on the elongated passage fr', as

'when itis from the cupA, air mayenter ther it will be seen ythat the plunger small openings will 'be left for passage ofair' downward through said passage tothe cup f during the .time rof withdrawing the plunger L. By means of the passage fr and valve s, desired to withdraw the cap and plunger cup and prevent back suction of the'lu'brL f cant, which suction would cause the 1u hricant to followr the plunger when withdrawing it from the cup.

f It will he understood that when the lubricant is under pressure by aotionof the spring the ball-valve s, by seating on the upper seat r2, prevents the f lubricant from beingforced out through the passager. f

Having thus described my invention, what I claim is`r y y A lubricator having, inr combination, a cup or reoeptaoleopen at top and provided with an outlet passage; yafcap closing the open ytop of the cup and having an opening; a plunger-sterny movable loosely in said opening and having any unoccupiedl air passage or round bore extending longitudinally; a plunger, L', provided with afsookety into `which the lower end of' therplunger-stem fits; a screw-plug closing the lowerL end of the socket and hav ing an opening; and ay ball-valve occupying the said socket and adapted to open and close the said ronndbore in the stern but when seated on ythe, ysaid screw-plug leaving small kopenings for downward passage of air tothe cup, substantially as described.

in the presence of two witnesses.

WILLlAM J. FERGUSON. Witnesses:

CHARLES B. MANN, Jr., C. CALVERT HINES.

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