US724022A - Piston-rod packing and packing-case. - Google Patents

Description

No.724,022. PATENTED MAR.31,'1903.

J. H. LEWIS & L. G. KUNZBR.

PISTON ROD PACI HNG AND PACKING CASE. APPLICATION rum) NOV. 10, 1902.

d fizg \Il l d J UNITED STATES ATENT QFFICE.

JOHN'H. LEWIS AND ouis e. KUNZER, OF CHICAGO, ILLINOIS.

\ PISTON-ROD PACKING ANDPACKING-CASE.

SPECIFICATION forming part of Letters Patent No. 724,022, dated March 31, I903. Application filed Novemberlq, 1902. Serial No. 130,636. (No model.)

and packing-cases for piston-rods, and is specially designed for locomotivepistons, which in practical use have more or less vibration, especially in rapid running of the locomotive over unsmooth tracks, though our invention is suitable for use upon other pistons.

The object of our invention is to provide a metallic packing and packing-case of a cheap, simple, and durable construction, which may be quickly and conveniently applied, either to straight pistons or those having enlarged cross-heads, and which will be steam-tight and efficient in operation and which will provide for the necessary vibration of the piston-rod when in use.

Our invention consists in the means we employ to practically accomplish this object orresult -that is to say, it consists, in connection with the piston-rod and cylinder-head through which the piston reciprocates and a case and follower having tapering or wedging faces to bear against the interposed packing, of a segmental metallic packing of Babbitt or other metal provided with a series or plurality of interfitting tongues and grooves at the. meeting ends of the segments, suflicient play being left between the ends of thetongues,

and the bottom or ends of the grooves to allow for the Wear and compression of the packing. The segmental interfitting tongue-andgroove packing is preferably made in three segments, though the number of the segments may be varied.

Our invention also consists, in combination with.the packing, of a divided or two-part follower and a divided or twopart case, each having wedging or tapering exterior faces in connection with solid clamping rings or 001- lars having corresponding wedging or. tapering interior faces which encircle and bear against the follower and case, thus enabling the packing, follower, and case to be very quickly and readily applied to piston rods having enlargements, as well as to smooth pistens or pistons without such enlargements.

.Our' invention also consists in the novel construction of parts and devices and in the novel combinations of parts and devices herein shown or described.

In the accompanying drawings, forming a part of this specification, Figure 1 is a vertical section of a piston-rod packing and gland embodying our invention. Fig. 2 is a crosssection on line 2 2 of Fig. 1. Fig. 3 is a detailelevation of the packing. Fig. 4 is a detail elevation of one of the segments of the packing, and Fig. 5 illustrates a modification in whichthe interfitting tongues and grooves are staggered or arranged zigzag across the packing.

In said drawings, A represents the pistonrod, and .B a portion of the cylinder-head through which it reciprocates,-and O is the packing gland or collar by which the packing as a whole is secured to 'andconfined in the opening or chamber 1) in the cylinder-head, said gland orcollar 0 being firmly secured to the cylinder-head by threadedbolts C, having nuts 0 D is our improved segmental metallic packing, the same being preferably composed of three segments, each of which is provided with a series of interfitting' tongues and grooves d d at their meeting ends,.so that the tongues (Z,fitting in the grooves d,lap by each other, and thus form a continuous packing all around the piston-rod. The tongues d do not reach to the bottom or end of the groove 02, so as to allow for wear and compression of the packing. After the packing becomes so worn and compressed that'the ends d of the tongues abut against the shoulders or bottoms 01 of the grooves the packing can be readily and cheaply repaired for further use by simply cutting or grinding oif the ends of the tongues d, thus making the same shorter.

- As illustrated in Fig. 5, the interfitting tongues and grooves (1 cl are staggered or arranged zigzag, so that the vacant spaces cl between the ends of the tongues and the bottoms of the grooves will not come in the same line transversely across the packing, which in some respects is a preferable form, though not quite so convenient for repairing or shortening the tongues. The packing D has at its outer end a tapering, curved, or wedging face (1 to bear against the corresponding tapering face f of the case F, and at its opposite end it has a tapering or wedging face 01 to bear against the corresponding tapering or wedging face 9 of the follower G.

To enable the packing D, case F, and follower G to be readily and quickly applied, especially to piston-rods having enlargements a thereon, we employ a divided or two-part case F and a divided or two-part follower G. The divided or two-part case F has a tapering or wedging exterior face f to receive the solid clamping ring or collar F, which has a corresponding tapering or wedging interior face f and in like manner the divided or two-part follower G has a tapering or wedgin g exterior face 9' to receive the solid clamping ring or collar G, which has a corresponding tapering or wedging interior face 9 To cause the segments or parts of the case F to properly register with each other, the same are furnished with dowel-pins f at their meeting ends, and the two parts or segments of the follower G are likewise furnished with dowel-pins g to cause the same to register with each other. The case F has an exterior flange or shoulderf tolimit the inward movement of the clamping-ring F thereon, and the follower G has an exterior flange or shoulder 9 for the conical-faced clamping-ring G to abut against. To provide for the slight rocking or vibratory movement of the pistonrod, due to the jolting of the locomotive, we provide the clamping-ring F with a slightlybeveled outer face f against which fits a ring K, having a correspondingly-beveled inner face 75, and which ring K is interposed between the flange C of the packing gland or collar 0 and said clamping-ring F.

M is the spring, which acts against the follower G or its clamping-ring G and'serves to compress the packing and take up the Wear. The inner end of this spring bears against a shoulder 11 at the end of the chamber bin the cylinder-head B,a two-part bearing-ring being interposed.

The packing gland or collar 0 may preferably be divided or made in two parts, as this facilitates'its application to the cylinder-head bracing said follower and having a tapering or wedging interior face, a spring interposed between said follower and the cylinder-head, a metallic segmental. packing interposed between said case and follower and havinginterfitting tongues and' grooves at the meeting ends of its segments, a two-part or divided and flanged packing gland or collar secured to the cylinder-head, and a ring interposed between the flange of said gland or collar and the clamping-ring surrounding the case, said interposed ring and clamping-ring having beveled meeting faces, substantially as specified.

2. A metallic piston-rod packing, comprising a plurality of segments, having a plurality of interfitting tongues and grooves at their meeting ends, said packing having ta= perin g or wedging faces at the ends thereof, and a case and follower each having tapering or wedging bearing-faces engaging said tapering or wedging faces of the packing, substantially as specified.

3. The combination with a piston-rod and cylinder-head, of a segmental metallic packing having interfitting tongues'at the meet ing ends of its segments, and a divided or two-part case having an exterior tapering face and a clamp-ring F having an interior tapering face, substantially as specified.

4:- The combination with a piston-rod and cylinder-head, of a segmental metallic packing having interfitting tongues at the meet ing ends of its segments, a divided or twopart case, and a divided or two-part follower, substantially as specified.

5. The combination with a piston-rod and cylinder-head, of a segmental metallic pack ing having interfitting tongues at the meeting ends of its segments, a divided or two-part case, and a clamping-ring embracing said case, substantially as specified.

6. The combination with a piston-rod and cylinder-head, of a segmental metallic packing having interfitting tongues at the meeting ends of its segments, a divided or twopart case, a clamping-ring embracing said case, a divided or two-part follower, and a clamping-ring embracing said follower, sub stantially as specified.

7. The combination with a piston-rod and cylinder-head, of a segmental metallic packing, a divided or two-part case having an exterior tapering face and aclamp-ring F having an interior tapering face and a divided or two-part gland, substantially as specified.

8. The combination with a piston-rod and cylinder-head, of a packing-ring, a case, a flanged packing gland or collar, there being a bevel end bearing face or connection between the case and the packing gland or collar to provide for vibration of the piston-rod, substantially as specified.

9. The combination with a metallic packing, comprising a plurality of segments having interfitting tongues at their meeting ends, of a case and a follower, a gland and rings interposed between the case and gland having-ring embracing the case having a beveled 10 end bearing-face to provide for vibration of the piston-rod, substantially as specified.

JOHN H. LEWIS. LOUIS G. KUNZER.

Witnesses:

H. M. MUNDAY, EDMUND ADCOOK.

of a case and follower, said case and follower being divided and having clamping-rings embracing the same and a gland, said clamp-

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