US654882A - Stuffing-box. - Google Patents

Description

No. 654,382. A Patnted luly 3|, |900. H. S. DURAND R. K. MCLELLAN.

(No Model.)

IIIIIIIIIIIIIIIII um u HENRY s. DURAND, on ROCHESTER, ANDRORERTK. MCLRLLAN, OF NEW YORK, N. Y.; SAID MCLELLAN ASSIGNOR TosArD DURAND;

srUFFiNie-BOXL( srneIFIenrIoN forming para of Letters Patent No. 654,382, date. Jury s1, 190e; i Application filed October 13,1899. Renewed May 19J 1900# Serial No. 17,295, (No modeLi To aZZ whom it may concern.-

Be it known that we, HENRY S. DURAND, residing at Rochester, in rthe county of Monroe, and ROBERT K. MCLELLAN, residing at New York, borough of Manhattan, county of New York, State of New York, citizens of the United States, have invented a certain new and useful Improvement in StuffingBoXes, of

which the following is a full, clear, and exact description, reference being made to the accompanying drawings, forming part of this v specification.

This invention relates to improvements in stufting-boxeswhich are used in connection with rotary shafts, such especially as the shafts of screw-propellers; and the invention consists of a stuffing-box proper provided with a shaft-bearing secured in the body thereof, the combined stuffing-box and bearing being constructedas herein described.

On the accompanying sheet of drawings, Figure l is a fragmentv of a longitudinal and vertical section of a boat to which the invention is applied; Fig. 2, a longitudinal section, on a larger scale,of the stu fling-box surrounding the propeller-shaft; and Fig. 3, a cross-` section of the stuffing-box and shaft on thei y than the interior of the .part 2. like.

plane :n x, Fig. 2. Similar reference-numerals designate part-s in different views.

This invention is intended not only to form all the useful functions of a common stuffing-box in cooperation with a propeller-1V shaft, but also to subject the shaft to but com paratiVely-little friction and to render it easy` to relieve the shaft from any unnatural pres;-

sure imposed upon it by a slightdispla'ceirient of the stuffing-box, such as is sometimes caused bya warping of the deadfwood or"V stern-post of a vessel, and to provide the shaft with an antifriction-bearing on the out.- side of the vessel close to the propeller, andy consequently to render unnecessary the vuse of a shaft-bea`ring within the vessel 'near the stuffing-box. Y

The invention is shown and described in,`

per-

. States NO. 629,343. Especially in boats of which this is a type are stuffing-boites embodyin g the invention manifestly superior to common stuffing-boxes but they may be used with advantage also in larger vessels comprising prope'llers driven by engines, as well as in connection with other rotary shafts besides propellerlshafts. y The popelle'rishaft l, carrying the propeller l', is supported by two bearings, one being the bearing within the stufing-boxand the other beingV adjacent to the motor `at the front end of the shaft.

The body of the stuiiing-box comprises the parts 2 and 2,'and on it are ears 20, by which itis fastened to the dead-wood lO, the smaller part 2 of the body being in a hole in the deadwood. The interior diameter of the part2 is considerably greater than the diameter of the shaft, and at the rear end of the part 2`is an.

internal shoulder 21. At the front end of this part is a hollow screw-plug 22, which loosely surrounds the shaft and forms a shoulder 22" Within the part 2. .N ext to this shoulder is a ring 23, of Babbitt metal or similar material, closely iitting the shaft, but not being tight thereon and being smaller in diameter This ring is held against the inner end of the plug 22 or the shoulder 22 by a coil-spring 24, which loosely surrounds the shaft, the rear coil of the spring resting against the shoulder 2l. In place of the ring 23 there might be a group of rings rcomposed of two or more rings 23 and a ring or ringsof felt alternating therewith. A hollow screw-plug 25 fits in and engages with' the part 2 of the body.` The perforated head 25" of this screw-plug loosely surrounds the shaft, and the stem of the plug has an internalannular projection 26 formed on it next to its front end. The parts 2 and 2 are united by an 'annular section, which'forms aninter- 4nal shoulder 27 at the front end of the part 2. The screw-plug 25 contains aring 28, of Babfbittfrnetal or similar material, which ts the shaft closely,`but is not tight thereon, and

whose diameter is less than the interior diameter of the stem of the plug. This ring is kept in contact with the inner surface of the head 25* of the plug by a coil-spring 29, loosely IOO s`u1roundingthe shaft and making contact at rings secured ina case.` The diameter of the case 3 is somewhat less'that the interiordi-k ameter of the part 2 of the body of the'stuing-box. The bearing-rings and'31 conf tain grooves which together form the ballchannel in which the balls 32 are confined behind and between the retaining-lips 30' and 3l'. Preferably bothof these rings are screwed into thecase 3 aud-locked therein by.

the means about to be described, so as to enable them both to be readily removed from the case; buton'e ofv them might be tightly pressed into the case or be otherwise permanently fastened therein. The means for locking one or both of the rings in the case consist-s of a screw .33, contained mainly in a threaded hole in the case 3, but engaging also with the thread of the bearing-ring, as ap.

pears by Fig. 2. The bearing-ring is locked in the case by driving the screw 33 tightly against the bottom of the threaded hole, that causing the thread of the screw to press firmly against the thread of the ring and keep the ring from turning. locked by loosening the screw 33, and it may be turned in either direction to adj ust itwithout-taking the screw out of the casey The bearing is confined in the stuffing-box at the frontend of the part 2', the case 3 of the bearing being clamped between the shoulder 27 and the front end of the screw-plug 25. The

reaction of the case 3 on the screw-plug locks The interior of the body of the stuffing-box i is connected with a reservoir 4 by a pipe 40, the reservoir shown being a collapsible tube, for which, however, a reservoir of another form might be substituted. The fillingof the -until a small quantity issues from its ends the stuffing-box is'kept properly supplied and deterioration of the filling is prevented. The filling not only excludes water from the stuffing-box, but it also lubricates the shaft-bearlng.

mally subjected by this stuffing-box is' but The bearing-ring is uu-4 The friction to which the shaft is norlittle more than that which is generated in the antifriction-bearing alone, there being only a light pressure exerted on the shaft by the rings 23 and. 28 and on the shaft and sleeve 34: by thesemitluid filling. If the dead-wood warps and displaces the stuffing-box slightly, either the stuffing-box does not bind the shaft, or, ifit does,usually thetro'uble thus caused may be easily and quickly remedied. The displacement of the stuffing-box does not destroy either the contact between the shoulder 22' and the ring 23 or that between the head of the plug 25'and the ring 28; but each contactchanges, the shoulder and head of the plug sliding a little'on the rings and the rings tipping a little on the shaft, the mobile or displaceable fillingnot oerin g anyappreciable resistance to this action. A displacement of the stuffing-box sometimes will not andsometimes will cause the bearing to bind the shaft.

vshaft neither coincide nor thus intersect each other, and the trouble can usually'be remedied by loosening the screw-plug25, whereupon the bearing assumes a natural position with respect to thebody of fthe stung-box and shaft, the chamber'in which the .bearing is confined being larger than the bearing-case, and afterward clampingthe bearing again in the body by tightening the screw-plug.v

This stuffing-box and bearing might be used for a common shaft-bearing, and although the stuffing-box proper would not then perform the function of excludingwater from the interior of avessel, yet that'use of the device is to be deemed a use of the invention.

Having thusldescribed our invention, what we claim as new, and desire to secure .by Letters Patent, is

1. .A stuffing box comprising: a hollow body; rings making a continuous changeable contact with surfaces at the ends of the body; and a shaft-bearing secured in the ,body between the rings; Vsubstantially. as described.

2. A stuffing-box comprising: afhollow body; a shaft-bearing secured in the body;

' `4. A4 stuffing-loox comprising: a hollow body; rings making a continuous changeableV IOO IIO

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contact with surfaces at the ends of the body; a semifluid filling confinedin the body; and a shaft-bearing comprising a ring of balls immersed in the illing; substantially as described.

5. A stuiing box comprising: a hollow body; rings making a continuous changeable contact at the ends of the body with internal annular surfaces,larger in diameter than the rings; and a shaft-bearing secured in the body between the rings; substantially as described.

6. A stuftingbox comprising: a hollow body; rings making acontinuous changeable contact at the ends of the body with internal annular surfaces, larger in diameter than the rings; a shaft-bearing secured in the body between the rings; and a displaceable lling surrounding the shaft between the bearing and the rings; substantially as described.

7. A stuffingbox comprising: a hollow body; rings making a continuous changeable contact with surfaces at the ends of the body; a shaft-bearing in the body, movable in directions transverse to the axes of the body and bearing; and means for securing the bearing in different positions in the body; substantially as described.

8. A stufingbox comprising: a hollow body; rings making a continuous changeable contact with surfaces at the ends of the body; and a shaft-bearing secured in the body between the rings, the bearing being a ballbearing having only a single row of balls; substantially as described.

9. A stufiingbox comprising: a hollow body; rings making a continuons changeable contact with surfaces at the ends of the body; and a shaft-bearing secured in the body between the rings, the bearing being composed of a case, bearing-rings fixed in the case and forming a ball-channel, and a single ring of balls in the ball-chann el substantially as described.

10. A stuffing box comprising: a hollow body; rings making a continuous changeable contact with surfaces at the ends of the body; a shaft-bearing in the body, movable in directions transverse to the axes of the body and` bearing, and being composed of a case, bearing-rings fixed in the case and forming a ballchannel, and a single ring of balls in the ballohannel; and means for securing the bearing in different positions in the body; substantially as described.

1l. A stuiing -box comprising: a hollow body having the parts 2 and 2', and provided with an internal shoulder 27 at the inner end of the part 2', and with a screw-plug 25 extending into the part 2'; rings making a continuous changeable contact with the head of the screw-plug 25 and a surface at the front end of the part 2; and a shaft-bearing which is inserted in the part 2' and clamped therein against the shoulder 27 with the screw-plug 25; substantially as described.

12. `A stuflngbox comprising: a hollow body having the parts 2 and 2', and provided with an internal shoulder 27 at the inner end of the part 2', and with a .screw-plilg 25 extending into the Vpart 2 rings making a continuous changeable contact with the head of the screw-plug 25 and a surface at the front end of the part 2; and a shaft-bearing which is inserted in the part 2' and clamped therein against theshoulder 27 with the screw-plug 25, the bearing being movable in the body in directions transverse to the axes of the bearing and body, and fixable in different positions between the screw-plug and shoulder; substantially as described.

13. A stuffing-box comprising: a hollow body having the parts 2 and 2', and provided with internal shoulders 2l and 27 at the inner ends of the parts 2 and 2 respectively, and with screw- plu gs 22 and 25 extending into the parts 2 and 2 respectively, the plug 25 having an internal annular projection 26; a ring 23, smaller in diameter than the interior of the part 2, and a ring 28, smaller in diameter than the interior of the screw-plug 25, the ring 23 making contactwith the end 22' of the plug 22, and the ring 28 making contact with the inside of the head ofthe plug 25; a coil-spring bearing against the ring 23 and shoulder 21,

and a coil-spring bearing against the ring 28 i and projection 26; and a shaft-bearing which is inserted in the part 2' of the body and clamped therein against the shoulder 27 with the screw-plug25; substantially as described.

14. In a stuifing-box or other device comprising a ball-bearing, the combination of: a bearing-case; a screw 33 extending into a threaded hole in the case; bearing-rings in the case, one of the rings being threaded and engaging with a thread in the caseandwith that of the screw 33; and a ring of balls between the bearing-rings; substantially as described.

HENRY S. DURAND. ROBERT K. MCLELLAN. In presence of- C. C. MILLER, WM. J. HANDovER.

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