USRE13474E - Planoohaph co - Google Patents

Description

F. W. EDWARDS. SIGHT FEED FOR LUBRIGATORS.

APPLIUATION rlLBD JULY 10.1911.

' ReiSSued Oct. 8, 1912.

P. W. EDWARDS.

SIGHT FEED PoR LUBRIGATORS.

APPLIOATION FILED JULY 10, 1911. Relssued 0st. 8, 1912.

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FRANK W. EDWARDS, OF LOGANSPORT, IND

CATOR COMPANY, 0F CHICAGO. ILLINOIS, A CORPORATION OF ILLINOIS.

SIGHT-FEED FOR LUBRICATORS.

Griginal No. 952,611, dated March 22, 1910, Serial Specification of Reissued Letters Patent.

No. 459,093. Application for reissue led Rcissued Oct. 8, 1912.

muy 1o, 1911.

Serial No. 637,796.

To (LZ1 whom it may concern:

Be it known that l, FRANK lV. EDWARDS, a citizen of the llniteil States, residing' at Logansport, in the county ot Cass and State ot indiana. have invented a certain new and useful Improvement in Sight-Feeds For Luhrieators, of which the following is a full, clear. and exact description.

An essential requirement in a sight-feed luhrieator is that it shall permit such oh servations ot' the feed that the operator may determine whether the luhrieator is 'Feedingl with the required regularity. To this end sight-feed luhrieatins have always` been constructed With .sightefeed chambers through which the oil passes drop h v drop, the whole or some portion of the wallsi ot these chambers being,r of glass. These glasses are usually called observation glasses and have heen ot' tivo general types. ln one of these types the o' ass is in the Ytorni of a tuhe of uniform diameter and havingr walls otuuit'orni thiekness,the oil passing through the tuhe. it is highly important that the sight-feed ehainher should he so located as to he readily observable itroin various points ot" view about the luhricator, and more iinportant still that its interior should be suhjected to light and that its interior should he illuminated hy the light comingr from various directions and passing through the transparent walls of the chamber. This facility ot observation has heen secured in the old ivell'known tubulaig'lass which is held at. its ends in supporting` arms usually provided with packing. lllhile this forni of glass was ideal in that it was so placed that the feed of oil could he observed from various positions, and also in that it permitted the light to enter the ehainher from various directions thus affording perfect illumination on the lubricator7 yet it has certain inherent and radical defects which have never heen overcome and `tor which heretofore no remedy has heen proposed. These defects arose troni the Ytrequent hrea kage due to the fragile character of the tube itself, no such glass having heen heretofore constructed of sutiieient strength to withstand the internal Asteam pressures and the strains flue to the variation of temperature and the getting out of line of the uiountings. These glasses frequently broke, thus putting the lubrieator out of service, and the danger from flying particles ot glass was so serious as to cause the use of wire guards around the glasses, thus adding to the expense and interfering with ready observation. The other type of glasses is known as the hullseye. These glasses are invariably mounted in pockets usually of metal, and fitted into the side walls ot the sight-feed chambers. These glasses are solid. and usually of greater axial length than diameter. The pockets or chambers containing,T the glasses are usually arranged in pairs, being placed in line with each other on opposite sides of the sight feed chamber. These glasses largely overcome the liability of breakage, but they do not afford ready observation from different points, having, in fact, only small areas exposed to the light and heilig for the most part surrounded by .solid Walls; and they cannot always he so placed as to permit the light to enter through both ,glasses or from opposite sides of the chamher. Further these glasses are so thick and their exposed areas so limited that they do not ati'ord goed illumination, and with turbid Water the feed of the oil cannot be observed readily. These objections are so pronounced that it is generally recognized that the bulls-eye type of glass ati'ords less facility for correct observationof the feed of the oil than the tubular glass. but these liiills-ey(rs have been and are used because ot their avoidance of the objections to tubular glasses above stated.

The object of my invention is to secure all of the advantages Without the defects of both forms of glasses above mentioned, and to insure complete illumination and perfeet observation, together with necessary strength and safety.

The invention herein consists principally in a reinforced observation glass for lubrieators, having' a central longitudinal oil passage, and a` tivo-part or one-part` packingcase in which the glass is contained, the portion of the glass exposed through such case being of greater thickness than its ends in order to withstand all ordinary pressures, strains, and shocks, and having its ends Variously forn'led and of reduced thickness relatively to the central portion, to receive suitl able gaskets by which it is cushioned and IANA, ASSIGNOR TO THE CHICAGO LUBRI- held in its case and in the supports for the l case between the upper and lower feedarnis of the lubricator.

The generic invention herein explained and illustrated ia various forms of species is also specifically illustrated in my cases Serial No. 450.094 (Patent No. 952,515 dated March QQ, 1910), and Serial Nos. L50,095 and 450,096, and the claims made in thisl reY issue are designed to cover the generic invention, and also to cover the specific invention in so far as the latter is singular to the particular illustrations hereof.

In the accompanying' drawiiigs, illustrating the invention, in the several figures of which like parts are similarlyY designated, Figure l is a vertical section, sonic parts in elevation, of a preferred forni of sight-feed condensation displacement lubricator` the section being drawn through the sight-feed for the air-pump lubricatingI connection and showing oneforni of reinforced observation glass and gaskets. Fig. Q is a longitudinal section of the sight-feed elements detached and showing a one-piece pacliingmase ory metallic container for the glass. Figs. 3, l

` the top of the oil-bowl.

and 5 are longitudinal sections, illustrating various forros of glasses and gaskets. Fig. 6 is a longitudinal section of the packing case of Fig, 2. Fig. 7 is a horizontal cross` section of the packing-case illustrating each of the various kinds of packing-cases. Fig. 8 is a view similar to Fir'. l, but showing the integral or one-part or one-piece packing` case. and the glass and packing of Fig'. 4.

For illustration and without therebyY liniiting the invention. I have shown a` horizontall)7 arranged cylindrical oil-howl 1` upon which is arranged a condenser 2, which may be cast. with the oil-bowl or applied to it through the medium of a screivthreaded nipple on the bowl engaged b v the nutlike end 3 of the condenser. The oil-bowl is pro` vided with an integral attachingslug' 4. At the top of the oil-bowl and cast integral therewith are the upper feed-arms 5, as many in number as there are parts to be lubricated, and all of substantiallyT the same construction as the one shown. rlhis feedarm has the internal passage G opening' into the passage 7 of the oil pipe connection S. which mai7 have the cholte'plug 9 in it. The passages described are supplied with steam through pipes 10 and 11, Which lead, for er ample, to the air-pump and the tivo engine cylinders respectively. These pipes are at` cached to a castingr 1Q which is connected with the condenser and has a boiler` connection 13 for supplying steam to the appara` tus. The condenser has a` valve i4 for com trolling its outtioW through pipe l5 into the oil-bowl, and the latter has a filling-plug` itl. The oil-bowl has a pocket i7 integral with its bottom and separated from it b v a partition 18. This pocket has a bottom opening i9 through which is inserted a cylindrical strainer Q0 whose perforations are smaller than the bore of the oil feed-tip. This strainer is supported in the pocket by a cap nut screwed into the opening 1%) and by a nut screwed in a hole in the partition lil, and this nut 22 also receives and supports the oil feed pipe 23 rising` to near The lower feed-arm Qel is screwed into the pocket and has the feed passage l5 which is intersected b v an oil feed valve itl seated in the upper wall of the lower feed-arm in line with the feedtip QT. and the upper Wall of said feed-arm is supplied with an integral hub 2S which surrounds the base of the feed-tip and foi-nis with it a pocket which is drained by channel 29 and valve 30. The upper feed-arm has an attached hub 31 provided with a` partition 5%2 haring a hole S3 in it, which vforms a seat for the valfe 31 which controls the inilow of steam and the outflow of oil. This feed-aun 5 is also provided with an end ripening closed by a plu@r which ina.)T be replaced bv au auxiliary oil-cup should the feed become deranged. The oil-bowl may be provided `with a drainingwalve 3G. vAll of the parts so far described in detail may he of approved construction. and some of them form parts of the invention of the case Serial ho. 450,09 before mentioned.

To avoid repetition, the packing device of whatever cllaracter Will be referred to here in as a gasket. and some of the forms of gaskets herein described are new.

Two forms of packinpY eases are herein shown, one of which, as shown in Figs. l, 3, fl and 5, is composed of two parts. namely, the case proper, 3?. and the paelting-nut 38, and the other is erunposed of a single part 39, as shown in Figs. (i and S. and both forms are represented in Fig. T. Both forms of packing-ease are provided with tubular extensions 40 for effecting a slip-joint con nection with the upper Vfeed-arm. hub 31, thrfaigh the niediuin of the packingnut del. These packing-cases are designed for use with reinforced observation glasses of various constructions, four of which are shown herein and others in one of the companion cases referred to, (Patent Xo. 952.51m.

The two-part packing-ease is screu'threaded internallv at top and bottoni for connection respectively with the packing-nut 38 and the hub QS on the lower feed-arm. and it provided with an)T desired number of openings 42 through which the glass and consequently the feed, are observable from inanv points of vision and Whereblv the feed is illuminated all around. These openings are separated hv the smallest possible strips 43 consistent with strength.

The reinforced observation glass #t4 has a` thick walled central portion l5 arranged externally as in Figs. 1, 2, 4 and 5, or internally as in Fig. 3, and symmetrical ends 4G of reduced external diameter as in Figs. 1, 2, 4 and 5 or reduced internally as in Fig. 3, to form shoulders on the glass for the reception of the gaskets, four different forms of which are herein shown. The glasses are provided with longitudinal oil passages 47, herein also referred to as a throughbore. As shown, the glass has its thick walled central. portion arranged opposite the openings in the packing-case so as to expose its portion of greatest strength and resistance.

`In Fig. l the glass is arranged between the upper and lower feed-arms and rests upon a gasket 48 interposedbetween its lower shouldered end and the edge of the hub 28, and upon a similar gasket 49 interposed between its upper shouldered end and the edge of the packing-nut, so that when the packing-case is screwed to the hub on the lower feed-arm and the packing-nut has been screwed down into the packing-case enough pressure is placed upon the gaskets to firmly hold the glass in place and effect tight joints therewith, and at the saine time the glass is nowhere in direct contact with the surrounding metal which supports it.` and hence is allowed ample space for eX- pansion in use.

As compared with the construction of the packing-case wherein an internal liange is used, (Case Serial No. 450,096), the omission of such iange involves the omission of one gasket and thus the manufacture and assembling of the parts are simplified and cheapened.

In the construction shown in Fig. 3, the glass r50 has a uniform external diameter and its ends are rabbeted or countersunk interiorly as at 5l, and the gaskets 52 at top and bottom are large enough to cover the ends of the glass and extend between the sides of the countersunk portion and an internal teat 53 of the packing-nut and the enlargement 54 on the base of the feed-tip. The gaskets in this case are complementally alike, and are of two diameters and provide a double contact on the glass. The teat 53 and the corresponding hase 54 of the feedtip afford shoulders between which and the countersunk portions of the glass the gaskets are pressed.

In Fig. 4 the glass 55 has beveled ends. and the packing-nut and the hub are correspondingly beveled. and between these surfaces are placed gaskets 56 which are approximately truncated cones with. base flanges in cross-section. In this construction the gaskets afford a double cushion for the glass and the glass is thereby kept clear of all metallic contact.

In Fig. 5 the glass 57 has its ends chamfered and provided with curved shoulders in Which are placed packing-rings or gaskets 58 of corresponding contour, or capable of taking on such contour under pressure. In this construction the curvatures, as distinguished from angles, afford strength at these points and overcome any defect that may be developed in making the glass. If the gaskets are shaped accordingly, the packing and application of the glass are greatly facilitated.

ln all of these various constructions there are the essentials of the inclosing and protecting case with many openings for the passage of the light and for inspection of the feed; the strong, reinforced glasses, and the gaskets interposed between the glass and the metal to effect steam, oil and watertight joints; and there are also present, equally in each of them, facilities for dismembering the parts for repair and other purposes.

In the forms of sight-feeds shown in F ige. l, 2, 4, 5 and 8, the construction and arrangement are such that there is a two-- place or double contact for each gasket, one contact on the reduced or upper cylindrical portion of the glass and the other on the shoulder formed by the. junction cf the reduced diameter and the greater diameter of the glass.

The shouldered ends of the glasses shown in. Figs. 3, 4. 5, and S, differ from the ends shown in Figs. 1 and 2 in not being made right angular in cross-section, but'tapering, and they may be described generically as slanting, and they are merely some of many forms that are adapted for use with gaskets of irregular' cross-section.

In all of the various forms of observation glasses included within the principle of my invention, it is to be noted that the construction or reducing of the ends of each of the glasses is such that the gaskets are supported by the said ends against escape when the casing is applied, and that these supporting' ends distribute the pressure both laterally and longitudinally of the glass without tendency to crush the glass.

In Figs. Q, 6 and 8, the packing-case and the packing-nut are made integral or in one piece. The gain in this construction as compared with the two-part construction is that one screwthreaded joint is avoided, and hence the cutting of two screw-threads. The construction is by this much simplified. In using this construction the relation of the upper feed-arm hub and the tubular eXtension of the packing-case is such that said hub may be unscrewed Jfrom the feed-arm and slid down over the tubular extension, and then the packing-case can be unscrewed from the lower feed-arm hub and the parts removed.

In using the two-part packing-case the packing-nut is unscrewed from it and then the packing-case is unscrewed from the hub 28 and thus the parts are left free to be taken out, repaired, removed or replaced as necessary. The gaskets form cushions between the glass and the metal and thus serve to protect the glass from being chipped or crushed when the metal expands, and they are of snlllcient elasticity to yield under contraction and maintain tight joints.

In all of the various forms o1 these reinforced observation glasses, special attention has been given to illumination and to their packing in metallic cases or containers in order to insure a perfect seal ot' the glass on the feed-arms and the packing-nuts and at the same time permit free expansion in any direction and yet retain tight joints. There is interchangeability of the various glasses and the two forms of packing-cases, by making obvious changes in the packing-cases, and, further` the glasses and gaskets are applicable to the construction shown in another concurrent case Serial No. 450,095v

wherein the feed-arms are modilied to constitute a container for them.

lhat I claim is l. A lubricator observation glass, made as a short thick tube, to provide for the passage through it ot' the lubricant, to att'ord siillicient strength to resist pressure and practically infrangible, and of greater thickness between its ends than at its ends, and having said ends constructed to receive and retain thereon packing rings. the ends being adapted to einer their supporting parts when in use, so that as pressure from said supporting parts is applied it will be transmitted longitudinally of the glass, the thicker portion alone of the glass being exposed between its supporting parts.

Q. A lubricator observation-glass, tubular in forni to provide for the passage through it of the lubricant and of great thickness to provide strength to resist pressure and blows, the greatest thickness being arranged about midway of its length and where the glass is exposed, and its ends reduced and shouldered to provide seats which of themselves are adapted to receive and retain packing-rings.

3. A lubricator observation-glass, tubular in form to provide for the passage through it of the lubricant and of great 'thickness to provide strength to resist pressure and blows, the greatest thickness being arranged about midway of its length and where the glass is exposed, and its ends reduced and shouldered to provide seats which of themselves are adapted to receive packing-rings which bear upon the glass circinnferentially and also endwise thereof.

4. A lnbricator observation-glass, tubular in form to provide for the passage through it of the lubricant and of great thickness to provide strength to resist pressure and blows, the greatest thickness being arranged about midway of its length and where the glass is exposed, and its ends reduced and shouldered to provide seats which of themselves are adapted to receive and retain packing-rings combined' with a packing-case within which the glass is conned.

5. In a lubricator, a sight-feed comprising an observation glass provided with a longitudinal oil passage, and having a thickalled central portion and ends of smaller diameter than the central portion, a packing-case for said glass, means to connect the packing-case with the lubricator, and packing-rings or gaskets interposed between the connecting means, the packing-case and the glass.

6. In a lubricator, having an oil-bowl, an upper projection and a lower projection, a sight-feed interposed between said projections and comprising a reinforced observation glass provided with a longitudinal oilpassage, and having a thick-walled central portion and ends of smaller diameter than the central portion, a packing-ease for said glass interposed between the upper and lower projections and having a slip connection therewith, and packing-rings or gaskets interposed between the said connection, packing-case and glass.

7. ln a lubricator, a sight-feed, comprising a reinfmced observation-glass provided with a longitudinal oil-passage and having a thick-walled central portion and ends adapted to receive and retain packing-rings or gaskets, and a packing-case for said glass` in combination with an oil-howl, an upper and a lower feed-arm on said oil-bowl, means to connect the packing-case with the said feed-arms, and packing-rings or gaskets interposed between the connecting means, the packing-case, and the glass.

8. A reinforced observation glass for lubricators, combined with a packing-case therefor having sight openings to permit a limited exposure of the glass, said glass being tubular and having a thick-walled central portion exposed at the openings in the packing-case and its opposite ends reduced and shouldered, and gaskets interposed between the packing-case and glass and received and retained upon the reduced and shouldered ends of the glass.

9. si reinforced observation glass for lubricators, a packing-case therefor having sight openings to permit a limited exposure of the glass, said glass being tubular and having a thick-walled central portion exposed at the openings in the packing-ease and its opposite ends reduced and shouldered, and gaskets interposed between the packing-case and glass and received and retained upon the reduced and shouldered ends of the glass and engaging the glass at two places, combined with the upper and lower feed-arms of the lubricator, said packingcase interposed between and connected With these feed-arms and retaining the gaskets in engagement With the glass.

l0. A sight-feed for lubricators, having a packing-Case provided with sight openings and a tubular extension in one piece therewith, a reinforced observation glass having a through-bore for the passage of the oil and its Walls thickened Where exposed in the sight openings and its ends reduced and shouldered, and gaskets interposed between the case and the ends of the glass and adapted to be combined with the upper and lower feed-arms of the lubricator, the aforesaid packing-case interposed between these feedarms and bearing directly upon said gaskets and forcing each of them into contact at two places with the glass.

11. In a siglit-feed for lubricaiors, a reinforced observation glass having its Walls thicker at iis middle portion than at its ends and having a longitudinal oil passage and reduced and slanting ends provided with shoulders to receive and retain the gaskets, combined with gaskets of comple nient-1l irregular cross-section applied to these ends and having Contact therewith at two places, and ineans to secure the glass and its gaskets to the lubricator.

ln testimony whereoic l have hereunto set niy hand this 7th day of July 1911.

FRANK W. EDW'ARDS.

Witnesses FRANK W. FURRY, CHARLES I. COBB.

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

Correction in Reissue Letters Patent No. 13,474.

It is hereby certified that in Reissue Letters Patent No. 13,474, granted October 8, 1912, upon the application of Frank W. Edwards, of Logansport, Indiana.

for an improvement in Sight-Feeds for Lubricators, an error appears in the printed specification requiring correction as follows: Page 2, line for the word of read or: and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Olee.,

Signed and sealed this 19th day of November, A. D., 1912.

iC. C. BILLINGS, Acting Commissioner of Ptenfs.

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