US807294A

US807294A - Metallic packing for piston-rods.

Info

Publication number: US807294A
Application number: US27096105A
Authority: US
Inventors: John H Lewis; Louis G Kunzer
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-07-24
Filing date: 1905-07-24
Publication date: 1905-12-12
Anticipated expiration: 1922-12-12

Description

No. 807,294. PATENTED DBC. l2, 1905. J. H. LEWIS & L. G. KUNZER. METALLIC PACKING POR PISTON RODS.

APPLICATION IILBD JULY 24, 1905.

IINITED STATES PATENT OFFICE.

JOHN H. LEWIS AND LOUIS G. KUNZER, OF CHICAGO, ILLINOIS.

METALLIC PACKING FOR PlSTON-RODS.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application iiled July 24:, 1905. Serial No. 270,961.

T0 all whom t may concern: I

Be it known that we, JOHN H. LEWIS and Louis G. KUNZER, citizens of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented anew and useful Improvement in Metallic Packing for Piston-Rods, of which the following is a specification.

Our invention relates to improvements in metallic packings for piston-rods, and more especially to improvements upon the metallic piston-rod packing forming the subject of our Patents Nos. 721,709 and 721,710, granted March 3, 1903n In the metallic packing of our said prior patents, Nos. 721,709 and 721,710, the outer leaf or member of' each segment was furnished with a narrow or tapering edge abutting directly against a corresponding shoulder on the adjacent segment, the edge of said outer leaf being tapered to allow for contraction of the packing to compensate for wear, while at the same time forming a close contact-joint, and sometimes difculties arise in practical operation, owing to the segment bearing this outer leaf being moved outward by the steam-pressure until this tapering edge slips over its meeting shoulder of the adjacent segment, and thus preventing this end of the segment bearing the overlapping leaf from returning to its normal position, and thus occasioning leakage.

The object of our present improvement is to provide a means for overcoming this occasional diHiculty or defect in the practical operation of our patented metallic piston-rod packing.

` Our present invention consists in the means we employ to 'practically accomplish this object or result-that is to say, it consists in a metallic packing comprising a plurality of segments, preferably four in number, each halved, notched, or oifset in two planes transversely to each other, forming overlapping leaves or members, and three transverse partial joints at the meeting ends of each two adjacent segments, each of which joints extends only part way through the metallic packing-ring as a whole, each partial joint coming at a different point of the circumference from the others, so that the several partial joints break joints with each other, each of the segments having an internal narrow or compressible finger or member abutting directly against a shoulder on its adjacent segment and fitting inside the outer movable leaf or member of such adjacent segment, so that the narrow or compression member cannot spring or move outward and overlap its abutting shoulder on the other segment, and thus occasion leakage in the packing or defective operation.

Our invention further consists in the novel construction of parts and devices and in the novel combination of parts and devices herein shown and described.

In the accompanying drawings, forming a part of this specification, Figure 1 is a longitudinal vertical section showing a portion of a cylinder-head and piston-rod furnished with a metallic packing embodying our invention. Fig. 2 is a section on line 2 2 of Fig. l, showing the packing-ring in elevation. Fig. 3 is a face view of the packing-ring looking from the opposite side thereof which is shown in Fig. 2. Fig. 4 is a detail perspective view showing one of the segments of the metallic packing-ring, and Fig. 5 is a perspective view of one of the segments of the packing-ring looking from the opposite side to that shown in Fig. 4f.

In the drawings, A represents a piston-rod, and B a portion of the cylinder-head, of a locomotive, through which the piston-rod reciprocates, our invention being specially designed for use as a packing for locomotive piston-rods, though applicable to other purposes.

D is the packing gland or collar, which is secured to the cylinder-head B by bolts D', the packing gland or collar being preferably divided or made in two parts for convenience of application around the piston-rod, especially in cases where the piston-rod is formed With an enlargement. The packing gland or collar D is furnished with one or more interior annular grooves or recesses d to receive the segmental metallic packing-rings F, according as it is desired to employ one or more metallic packing-rings for the piston.

Our improved metallic packing-ring comprises a plurality of segments F, preferably four in number, each of which isr halved, notched, or offset in two planes, one being parallel to the circumference of the piston or packing-ring and the other plane of division being at right angles to the piston and forming overlappingleaves or members, and three radially-extending partial joints,each of which radial joints, however, extends only part way across or through the packing-ring. The segments F are all exactly alike, and each thus has at one end an inner leaf or member f and IOO IIO

at its opposite end an outer leaf or member f', which overlaps the inner leaf or member f of the adjacent or meeting segment. Each of the segments F also has its inner leaf or 5 member f provided with a side leaf or member f2 and at its opposite end with a side member f3. which overlaps the corresponding side leaf or member f2 on the end of the adjacent or meeting segment., Each of the segments IO F has a peripheral notch f* at one end to receive the overlapping leaf or member f on the adjacent or abutting segment and with an interior partial notch f5 half-way through the thickness of the segment to receive the side I5 leaf f2 on the inner leaf f of the adjacent or abutting segment. The shoulder f of the notch f4 and the end f7 of the outer leaf f of two adjacent segments thus form one partial radial joint fs through the packing-ring, 2O this joint extending through the whole thickness of the ring, but only partially through the ring radially. rlhe adjacent shoulders f9 of the inner leaff and flo of the inner leaf f3 thus form another partial radial jointfu, this 2.5 joint extending only half-way through the thickness of the packing-ring as a whole and also only part way through the packing-ring radially, and the adjacent shoulders fu and f13 also form another partial radial joint f, which likewise extends only partially through the packing-ring as a whole radially and only part way through the thickness of the packing-ring, and the several partial joints ffu, and f14 comeat different points of the circumference or break joints with each other. The inner leaf or member f of each segment E is furnished with a narrow or compression finger f 15, the extreme edge of which abuts snugly against the radial shoulder f 10 of the next adjacent segment, thus forming a tight joint therewith, while at the same time permitting compression or upsetting of this narrow linger, and thus compensate for wear and permit the segments to contract or come together as the inner periphery of the packingring wears away by the reciprocation of the piston. All the segments F are furnished with a peripherally-.extending groove f 17 to receive a coil-spring ring which surrounds the segmental metallic packing-ring as a whole and serves to hold the segments together.

The packing gland or collar D isprovided with one or more, preferablyfour, small openings CZ for admitting steam into the annular 5 5 groove d, so that the steam-pressure will lirmly compress the segments of the packing-ring around the piston and form a tight joint in cases where, as illustrated in the drawings, the packing gland or collar D is provided with two or more recesses CZ and two or more packing-rings F. Each succeeding packing-ring groove d is provided with steam-inlet openings d, s o that the steam escaping through the preceding packing may enter and cornpress the succeeding packing.

The segments or parts of the packing-gland D are secured together by bolts cl2. A packing d3, of wire or other suitable material, is interposed between the packing gland or collar D and the cylinder-head B. Space is left between the meeting end faces or shoulders of the several overlapping leaves or members of the adjacent segments F of the packing-ring to allow for wear and contraction of the packing, the narrow compression-finger f1 on the inner leaf or member of each segment upsetting or compressing to permit of this contracting movement of the segments in respect to each other. This narrowcompression-linger is made comparatively narrow or thin to permit of its proper upsetting or compressing under action of the steam-pressure on the packing-ring as the packing wears away, so that the packing-ring as a whole will always maintain a tight close fit about the piston.

We claim- 1. A metallic packing for piston-rods comprising a plurality of segments offset, halved or notched together at their meeting ends in two different planes or directions,and forming three joints at different points of the circumference, one joint extending' radially through the outer portion of the ring and the other two extending only part way through the inner portion of the ring, the inner leaf on each segment having a thin or narrow compression-finger overlapped by the outer leaf of the adjacent segment, and adapted to upset or be conipressed to permit the segments to contract or come together to compensate for wear, substantially as specified.

2. A metallic piston-rod packing comprising a plurality of segments having each at their meeting ends double notches or offsets forming overlapping leaves or members, and three joints at different points of the circumference, one of which extends only through the outer portion of the packing-ring, and the other two of which extend each only part way through the inner portion of the packing-ring, the inner leaf or member of each segment being provided with a compression-finger abutting against a radial shoulder of the adjacent segment and being overlapped by the outer leaf or member of such adjacent segment, said compression-fingerA yielding or upsetting to permit contraction of the segments and compensate for wear, substantially as specified.

3. Ametallic packing comprising a plurality of segments having at their meeting ends double notches or offsets in different planes forming overlapping leaves, and three joints at different points of the circumference, one of which extends only through one portion of the radial thickness of the packing-ring, and the other two of which joints extend each only part way through the other portion of the radial thickness of the packing-ring, said segments being furnished on their inner leaves or members with a compression finger or mem- IOO IIS

ber overlapped by the outer leaf or member of the adjacent segment and serving by its 5. A metallic packing comprising a plurality of segments having overlapping leaves or members at their meeting ends forming three partial radial joints, the inner leaf or member of each segment having a narrow compression-finger yielding or upsetting to permit contraction of the segments and compensation 2O for Wear, substantially as speciiied.

` JOHN H. LEWIS.

LOUIS G. KUNZER.

Witnesses:

PEARL ABRAMS, H. M. MUNDAY.