US1312330A

US1312330A - Lttbricatob foe

Info

Publication number: US1312330A
Authority: US
Publication date: 1919-08-05
Anticipated expiration: 1936-08-05

Description

J. P. KELLY.

LUBRICATOR FOR AIR COMPBESSORS.

APPLICATION FILED JAN. 20, 1919.

1,."512,33O. Patented Aug. 5, 1919.

' FiG;l

G I Y 22 UN D TATES JOHN P. KELLY, 0F PITTSFIELD, v

LUBRICATOB ron. AIB=COMPBE$OR$ Specification of Letters Patent.

P ten e Au 1919- Application filed January 20, 1919. Serial N 0. 272,004.

To all whom it may concern:

Be it known that I, JOHN P. KELLY, a citizen of the United States, and a resident of Pittsfield, in the county of'Berkshire and State of Massachusetts, have invented a certain new and useful Improvement in Lubricators for Air-Compressors, of which improvement the following is a specification.

This invention relates to lubricators, and more particularly to lubricators for air pump cylinders.

In devices of this character, as heretofore used, difficulty has been experienced in obtaining a uniformity in the feed of oilunder the varying conditions in actual service, due principally to the great changes in temperature to which the oil is subjected' The object of my invention is to obtain a more uniform and certain feed of the oil through the feed passages to the pump cylinders, and forthis purpose I provide means for agitating the oil and maintaining the same in a thin fluid condition, regardless of vari-. ations in temperature and other conditions. Another feature of my improvement comprises reciprocating means operating in the feed passage for controlling the feed of the oil, and according to'another' feature of .my invention, the agitating means'and reciprocating means are. operated automatically by the action of the pump;

In the accompanying drawing: Figure 1 is a vertical central section ofone form of lubricator embodying my improvement; Fig. 2 a plan of the propeller wheel, for rota'ting the shaftofthe agitating mechanism;

:Fig. 3 an inverted horizontal section of said shaft taken on the. line 33 of Fig. 1; and, Fig. ,4, a horizontal (section taken in the same plane.

According to the construction shown, the lubricator comprises a casing, 5, having chamber, 6, for containing oil, and provided with a cap, 7, having perforations, 1 8, through which air .may be drawn by the suction action of the pump. From the:bot-

tom of the oil chamber a feed passage leads downward into a .conduit, 9, containing a check valve, .10, normally heldclosed by a spring, 11, located in acliamber, 12, from .which the outlet passage, 13, for the oil leads throu h the base of the casing, which is threa ed at 14, forconnection with the a1r cylinder of the pump. While any sultable ifgrm of check valve maybe employed, the

valve, 10, is shown as provided with a tubular' guide stem, 24, extending within the feedpassage, 9, and having perforations, 25, for the passage of air and oil when the valve is opened by the suction action of the pump plston. I V

For the purpose of maintaining the oil in the chamber in a thin fluid condition under variations in temperature, so as to preserve a constant and uniform feed, I provide means for agitating andheatingup'the oil in the chamber. While any suitable form of agitating mechanism operated-by the action spindle'is' supported by means of a collar, '22, having aface bearing upon a seat, 21, formed upon the ca'singat thebottom of the oil chamber. The hollow spindle, 15, pr'eferablyoextends through the feed passage into the outlet conduit, 9, with a more or less loose bearing 1; it,a'nd for the purpose of causing a reciprocating movement of said spindle in the feed passage, the engaging faces of the seat,2l, and the collar, 22, may

be made undulating or formed upon a 'sort of a 'sinuous' curve, as indicated, whereby when the spindle is rotated, it will also be reciprocated vertically as the high and low portions of the curvedsurface on thecollar' "pass over the corresponding curved portions of the seat. This produces a plunger action for the oil in passing through the feed passage."-The upper end of the spindle may be provided with a suitable bearing in the cap portion, 7. Oil may be introduced into the chamber, 6, through a suitable filling plug, 26.. i .l

The operation is as follows: -During'the su'ction strokeof the pump piston the partial' vacuum produced in passage, 13, effects .the opening. of valve, 10, against its spring, f 11, and air is drawn in through inlet'ports,

i capto the chamber, 6, abovethe oil,

80 }near the upper end of the spindle, 15. The

and from thence through passages, 19, int disk 20, passage, 18, in the spindle, 15, feed! 16, in the 011 at the bottom of the chamber,

serves to so agltate and beat up the oil that in a thin fluid state adapted i it is maintained with it the small 17, and cause the ftatlng mechanism in said chamber, said 'mechanlsm being operated by the action of the pump for agitating the oil.

This rapid rotation of the arms,

ing the cap, 7, and lifting out all of the movable parts together, and readily assembled n position.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a lubricator for air pumps, the combination of a casmg having an 011 chamber,

, a feed passageleading therefrom, and agi- 2. In a lubricator for air pumps, the combination of a casing having an oil chamber,

a feed passage leading therefrom, agitating unechanism in said chamber, and means actufor feeding uniformly even when subjected igfated by the suction of the pump for operatto low degrees of temperature. As the spini fgmg the agitatlng mechanlsm.

dle is rotated it also moves up and downl through the inlet portion of the feed passage for the oil, and by this reciprocating movement produces a sort of plunger actionupon the oil to assist in feeding the same through the restricted passage around the outer surface of the spindle. In this manner the oil is fed slowly and constantly in a thin film down through the passage into conduit, 9, where it is taken up by the incoming air through passage, 18, and carried into the pump cylinder. This produces a slow and uniform rate of feed to the oil even under varying conditions and temperature.

'At each compression stroke of the pump piston, the pressure acting through passage, 13, instantly closes the valve, 10, assisted by the spring, 11, and prevents the compressed air from blowing out through the lubricator.

As the air inlet passage, 18, communicates with the feed conduit, 9, at a point below the restricted feed passage from the oil chamber around the lower end of the spindle, it will be seen that oil in the chamber is relieved from the suction action of the pump and remains substantially balanced as to air pressure. This prevents the oil from feeding too rapidly. The closeness of the fit between the lower end of the spindle and the walls of the feed passage may be made to suit the desired conditions.

With the form of check valve shown, having the tubular guide stem, 24:, fitting with in the feed passage, 9, and the perforations, 25, at the face of the valve, itwill be seen that the capacity of the passage for the flow of air may be determined by the number and size of the perforations, and by varying the capacity of the passage through said perforations relative to the capacity of the passage, 18, through the spindle, the suction effect upon the oil through the feed passage around the end of the spindle may be varied to give the desired amount of feed.

My improved construction alsohas the advantage of being simple and compact, easily taken apart for cleaning by simply remov- 3. In a lubricator for air pumps, the combination of a casing having an oil chamber, a feed passage leading therefrom, a rotatable agitator in said chamber, a passage for admitting air to said feed passage, and means actuated by the air drawn into said passage by the suction of the pump for operating the agitator.

4c. In a lubricator for air pumps, the combination of a casing having an oil chamber, a feed passage leading therefrom, a rotatable shaft having projecting arms in said chamber, and a propeller wheel mounted on said shaft and operated by the suction of the air pump, 7

5. In a lubricator for air pumps, the combination of a casing having an oil chamber, a feed passage leading therefrom, a hollow spindle provided with projecting arms and a propeller wheel, thepassage in said spin-.

dle communicating with the feed passage and with the air space in said oil chamber, and air lnlet ports adjacent to the propeller wheel.

6. In a lubricator for air pumps, the comblnatlon of a casing having an oil chamber,

a feed passage leading therefrom, a check reciprocating said spindle.

8. In a lubricator for air pumps, the combination of a casing having an oil chamber, a feed passage leading therefrom, a passage for admitting air into said feed passage, a spindle extending from the oil chamber into the feed passage, and means operated by the suction of the air pump for reciprocating said spindle.

9. In a lubricator for air pumps, the combination of a casing havlng an oil chamber,

a feed passage leading therefrom, a spindle extending from said chamber into the feed passage and having projecting arms, and means operated by thesuction of the air pump for rotating and reciprocating said spindle.

10. In a lubricator for air pumps, the combination of a casing having an oil chamber, a feed passage leading'therefrom, a spindle extending from the oil chamber into the feed passage and provided With projecting arms and a propeller Wheel, air inlet ports adjacent to said Wheel, and means operated by the rotation of the spindle for reciprocating the same.

11. In a lubricator for air pumps, the combination of a casing having an oil chamber, a feed passage leading therefrom, a rotatable spindle extending from the oil chamber into the feed passage and having 'proj ecting arms, a propeller Wheel and a disk on the upper portion of said spindle, and anextending from the oil chamber into the feed,

passage and provided With a collar having a curved bearing surface, a supporting seat therefor having a corresponding curved surface, and means for rotating said spindle.

13. In a lubricator for air pumps, the com bination of a casing having an oil chamber,

a feed passage leading therefrom, a check valve having a tubular guide stem mounted with a sliding fit in said feed passage, and

perforations 111 said tubular stem at the face of the valve, and an air inlet passage communicating with the feed passage.

In testimony whereof I have hereunto set my hand.

JOHN P. KELLY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. 0.