US758410A - Packing-cup. - Google Patents

Description

- lib-758,410. PATBNTED AER. 26, 1904;.

R. BURNSIDE.

PACKING 0UP. APPLICATION mum D30. 1a, 1903.

no 110mm.

' Attorngys m: m PETERS cu, "mom-nu, WASNING'YON o. c.

through the stuffing-box or vibrationbox Patented April 2 1904.

PATENT O ICE.

ROBERT BURNSIDE, .OFMONTREAL, CANADA.

PACKING-6UP. Y

SPECIFICATION forming part of Letters Fatent No. 758,410, dated April 26, 1904.

Application filed December 16, 1903-1 Serial N0- 18534'7- (No model.)

To all whom it may concern: 7

Be it known that I, ROBERT BURNSIDE, a

subject of the King of Great Britain, residing at Montreal, county of Hochelaga, Province of Quebec, Canada,ha've invented certain new and useful Improvements in Packing-Cups; and I ,do hereby declare that the following is a full,

clear, and exact description of the invention,

such as will-enable others skilled in the artto which it appertains to make and use the same. My invention relates to smiling-boxes or vibration boxes for steam-cylinders, and e'specially to the construction of. such parts when used inconnection with locomotive-cylinders.

In applying stufling-boxes to locomotivecylinders, and especially in renewing the packing-rings, a difficulty arises due to the presence of a collar upon the piston near the crosshead, which collar prevents the passing of and combination of parts to be more fully described hereinafter and definitely set forth in the claims.

In the drawings, which fully illustrate my invention, Figure 1 is a longitudinal section constructed according to my invention. In this view the piston-rod is shown, together with a portion ofits cross-head end; Fig. 2 is a front elevation of the boX, the piston-rod being shown in section. tive representing a half of the basering which is instrumental in retaining the packing-rings. Fig. 4 is a perspective representing a half of a follower-ring which is also instrumental in retaining the packing-rings. Fig. 5 is a perspective of a yoke-ring used in conjunction with two half-rings such as shown in Fig. 4.

Throughout the drawings and specification the same numerals of reference denote like parts.

- Referring more particularly to the parts, 1 represents a portion of a cylinder-head, which Fig.3 is a perspecis provided with a bore 2, through which the piston-rod 3 passes, the said bore 2 having an enlarged counterbore 3, forming a recess which receives a powerful helical spring 4, as shown, the purpose of which spring will appear more fully hereinafter. Upon the outer face of the head agland '5 is attached, the same having bolt-openings 6 for this purpose. This .ciently large to pass over thecollar 11, which is formed upon the rod 3, near the outer eX-Q" tremity thereof. This ring may also have an enlarged counterbore 12, as indicated. The inner face of this main ring constitutes aseat for a vibration-cup 13, which cup is prefer-L ably of substantially cylindrical form and has a conical bore 14, terminating in a plain cylyndrical bore 15, beyond which there is formed an inwardly-projecting shoulder or' flange 16, at which point the bore is substantially' of the same diameter as the bore 10 and adapted, like the bore 10, to enable the vibration-cup to be placed over. the aforesaid collar .11;

The inner face of the shoulder 16 constitutes a seat for a base-ring 17, which ring is preferably formed of two half-rings 18, one

of which is very clearly shown in Fig.3.

These half-rings have cylindrical outer faces 19, adapted'to be received by the bore 15, and

have comically-bored faces 20, as shown, which latter faces constitutea seat for a main packing ring 21, which is also formed in halves, like the ring 17. The inner diameter of the ring 17 is slightl-ylarger thanthe diameter of the piston-rod 3, as shown, while the bore which flange is of sufliciently large diameter so that its edges will project beyond the edges of the counterbore 3 in the cylinder-head. The halves of this ring 24 are held in position by a yoke-ring 28, the same consisting of a plain ring, as shown clearly in Fig. 5. This ring passes over the body 26 and rests upon the under face of the flange 27, as indicated most clearly in Fig. 1.

The parts contained in the gland having been assembled in the manner decribed and as illustrated, these parts would then be applied to the outer face of the cylinder-head, as illustrated in Fig. 1, so that the spring 4 could thrust against the follower-ring 24, and in order to insure perfect steam-tightness of the gland at its inner face the sameis bolted down upon a packing-wire 29, which is preferably formed of soft copper or similar material.

The ease with which the vibration-box described could be applied to the cylinder-head should readily appear, it being understood that the gland 5, the main ring 9, and the vibration-cup are all of sufficiently large diameter to pass over the collar 11. The basering 15 being split, it will be readily put in position after the other parts have been passed beyond the collar. In like manner the packing-rings could be applied and the followerring 24, which is held in place by the yokering 28, which is of large diameter, as illus: trated. In this manner the difficulty arising from the presence of the collar is overcome simply and a vibration-box is produced which is simple in construction and admirably adapted for its purpose. The spring t operates to maintain the packing-rings in position within the vibration-cup, and the fact that the follower-ring 24 is of greater diameter than the bore 3 prevents any possibility of the said follower passing back into the bore 3 when the piston is moving inwardly, as it might tend to do by reason of the friction developed. This is an advantageous feature, as it prevents any possibility of the packing becoming loose or deranged from this cause.

While I have shown in the accompanying drawings the preferred form of my invention, it will be understood that I do not limit myself to the precise form shown, for many of the details may be changed in form or position without affecting the operativeness or utility of my invention, and I therefore reserve the right to make all such modifications as are included within'the scope of the following claims or of mechanical equivalents to the structures set forth.

Having described my invention, what I claim, and desire to secure by Letters Patent, is

1. In combination, a gland adapted to be attached to a cylinder-head and adapted to have a piston-rod pass therethrough, a vibrationcup, means for supporting the same within said gland, said vibration-cup having an enlarged diameter with a forwardly-projecting shoulder, a base-ring formed in sections and of a restricted inner diameter seating upon said shoulder, packing-rings seating upon said base-ring within said cup, and a follower-ring adapted to retain said packing-rings.

2. In combination, a gland adapted to be attached to the outer side of a cylinder-head and adapted to have a piston rod pass therethrough, a vibration-cup supported therein and having an enlarged inner diameter with an inwardly-projecting shoulder, a base-ring formed in sections and having a restricted diameter seating upon said shoulder, packingrings seating upon said base-ring, a followerring made in sections and adapted to retain said packing-rings, and a yoke-ring of enlarged diameter encircling the sections of said follower-ring.

3. In combination, a gland, a piston-rod passing therethrough and having a collar of enlarged diameter, a vibration-cup carried within said gland and .having an enlarged inner diameter adapted to pass over said collar and having an inwardly-projecting shoulder, a base-ring formed in sections seating upon said shoulder and having a restricted inner diameter, packingrings seating upon said base-ring. a follower-ring made in sections and having a restricted diameter, and a laterallyprojecting flange, a yoke-ring encircling the body of said follower-ring, a cylinder-head having a counterbored recess therein, and a spring received within said recess and thrusting against said follower-ring.

In witness whereof- I have hereunto set my hand in the presence of two witnesses.

ROBERT BURNSIDE.

Witnesses:

T. MYNARD, M. MCALEER.

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