US321117A - landis - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

` At B. LANDIS.

, l VALVE GEAR. v110.321.117."4

Patented June 30, 1885.

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`(-NO MOdGL) I 2 Sheets-Shet 2.

' B. LANDIS.\

- VALVE GEAR. No. 321,117. PatentedJune 30,1885.l

NITED STATES l PATENT Brietz.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 321,117, dated `Tune 30,1885.

Application tiled February 4, 1885.

(No mo lul.)

ling an engine; and the invention consists in ce1-tain features of construction, hereinafter de scribed,and specifically set forth in the claims.

Referring to the drawings, Figure 1 is a plan, partly in section, of details of ashifting eccentric and its adjnncts sufficient in extent for a clear understanding ofthe invention. Fig. 2 is a face View of the eccentric, showing the shaft in section. Fig. 3 is a transverse section of the same. Fig. 4 is an end elevation of the left-hand portion of Fig. 1, the shaft being shown in section. Fig. 5 is aface View of the eccentric, showing the shaft in section, with two governing-plates, ribbed on only one of their sides and passing through said shaft, and a central bar, partly cylindrical but having opposite sides flattened and ribbed. Fig. 6 is an enlarged detail i-n elevation of the ribbed bar and one of tne ribbed plates. Fig. 7 is an end elevation of the ribbed bar and plates. Fig. 8 is an end view of the sliding collar and its sleeve. Fig. 9 is a longitudinal section of said collar and sleeve. Fig. 10 is an end elevation of the ribbed bar, with two pairs of ribbed plates to operate two eccentrics in a double engine. Figs. 11 and 12 represent in section and side view the sliding collar, sleeve, and operating-lever.

Like letters indicate like' parts in all the ti gnrcs..

The object of this invention is approximately the same, but in some particulars is an improvement upon the invention for which a patent was granted to me November 18,1884, No. 308,079, the object of the two governingplates andY of the ribbed collar being to present an extensive bearing-surface, and consequently durability to the frictional surfaces against both end thrust and side thrust.

In the drawings,A represents a driven shaft of an engine, on which is mounted acrank or other digk, B, having upon its facea frame, C, the inner faces of which are beveled to recelve a beveledged sliding hasepiece, D, secured v to or formed as a part of the eccentric E. The frame C is adjusted to the disk B and base- -piece D by means of liners placed under the frame C, and the latter is secured to the disk by bolts b or screws b',.so that some of the liners can be easily removed when a closer adjustment is required, owing to the wear of the parts. The side through which the bolt b passes entirely through the disk is without liners thereunder, and by tightening the nut or drawing upon this bolt the frame C'springs andbinds tightly the eccentric. This eccentric is held thus when the engine is doing 'such work that it docs not require reversing, consequently taking all the wear off the collar; but when usedas a reversing-cngine,asin' a traction-engine on the rond or a hoisting engine, Athe bolt b should be slack to-allow the eccentric to move freely by operating theA lever M.

The eccentric E and base-plate are slot-ted, f

as at EQ in order that they may be thrown across a shaft to vary the throw ofthe valve, or to reverse the engine by means of the usual eccentric-strap and connecting-rod, mounted upon the eccentric E and connected with the valve of an engine. The means shown in Figs. l and 2 for varying the position of the eccentrics are similar to those in my Patent No. 308,079, and consist of a bar, F, having ribs upon two of its sides, and extending diagonally across thc same. This bar passes through a slot formed in-thc shaft, and is arranged within the eccentric E, so that when the bar is moved within thc slot and across the shaft the. eccentric and plate l) are also moved therewith. The shaft A is bored ccntrall y and longitudinally, as at A2, for thc reception of the means employed for moving the bars F across thc shaft. The devices employed for that purpose, and shown in Figs. 1 and 2. are two semicylindrical bars, G, ribbed diagonally upon their flat surfaces, as at tl', to mesh with'the ribs of the bar F.

In Figs. 5, 6, and 7 thc operating-bar G2, within the hollow shaft A,is partly cylindrical, and has two opposite sidesllattened and transversely ribbed, and two bars, F", are made to ICO pass through t-ransverseopenings A in the shaft A and bear against the ribbed sides of the bar G2. The inner sides of the bars F2 are also diagonally ribbed, and made to mesh with the two ribbed sides of the bar G2. The advantages obtained with two bars, F2, is that the bar G2 has a full bearing at the top and bottom, and has not the 'apparent tendency to hug the governingbars shown in Fig. 2. The bar G2 may also be entirely cylindrical, and the ribs be cut deeper therein. In place of using two bars, F2, Fig. 5, only one of them might be used, (although not so good,) in which case the central bar, G2, might be ribbed on one side only.

To operate two eccentrics in a double engine, wherein the eccentrics would be placed side by side and at right angles to each other, the bar G'l would be ribbed on four sides to mesh with two pairs of ribbed bars, F2, as shown in Fig. 10. The bar G2 could then be square or other shape in cross-section, being made cylindrical simply for convenience in manufacturing or borirgthe shaft A. The inner endlof the bar G2 is formed either with a countersunk recess, adapted to receive the cylindrical head H, Fig. 1, and the reduced portion I of the operating-rod J, located within the central bore of the shaft A, or the inner end of the bar G2 may be recessed and screwthreaded Fig. 6 to receive the screw-threaded end of the bar J, so that the length of the op' eratingbar J G2 may be adjusted; but these parts J G2 may also be made in one continuous piece. The opposite end of the rod G is slotted for the reception ofa key, K,which is passed through a slot, A3, formed in the shaft A, and said key is held in place by means of a sliding collar, L. This collarismade'in two halves, L', notched in the joint, as at Z, in each half for the ends of the key K to t into. The two hal ves,L, are fitted to' come together firmly withoutbinding on the shaft. The length ofthe collar is sufficient to keep the slot Aa covered in all positions. This collar L is provided with asuitable number ofcir'cumfcrential ribs F on its outside surface, and is surrounded by a sleeve, L2, made also in two halves fitting together at the joint Z3 in a manner similar to the collar L. The sleeve L2 has internal corrugations,Z4,and two conical holes Z5 for the reception ofthe screws m,forming the trunnions in the ope'ratingllever M,the free end of which runs over a notched sector M2, serving to hold the lever in different positions to determine the extent of the longitudinal movement 0f the bar G2 within the shaft, and the consequent position ofthe eccentric by reason of said movement.

The pivotal end of the operating-leverM is connected by a link, M2, to a bearing, M. A second bearing, N', is shown near the eccentric; but it is evident that my improvements are equally adapted to shafts of engines having the eccentric between the bearings. The space between the ribs Z2 and the corrugations Z of the sleeve LZ is for the reception of Babbitt or anti-friction metal which will form the bearings for the ribs Z2, thus giving a large amount of bearing for the end't-hrust of the lever on the collar, and thus adding to their durability, and at the same' time keeping the slot closed in all positions. The inner end of the lever M that goes around the collar is made in two halves,so that the whole device can be removed from the shaft and taken off without disturbing the shaft of the engine.

Now it will be noticed that by first entering the rod J partly within the bore of the shaft A, and applying to the screw-threaded end thereof the bar G2, and then entering saidbar within the bore of the shaft through the opening B formed in the disk B, that said bar G2is provided with a long bearing within the shaf t, and that the ribbed bars F2 may then be inserted through the slots A in the shaft, and be made to mesh with the ribs and grooves of the central bar, G2, and, being forced entirely through the shaft, the bearings moving longitudinally4 therein as the bars F2 are forced against them. A dust-guard,0, is also placed between the bearing N and the eccentric E, the dust-guard being a plate pf suitable material apertured to tit the shaft loosely, 'and` extending beyond the opening in the body of the eccentric, so as to exclude all dust and dirt from getting within the eccentric. A

` cap, B2, is screwed or otherwise secured withiu the openingB to, prevent the entrance of dust therein at the end,and the collar L covers the slotfAs and excludes dust therefrom. The frame C is now secured to the face of the disk by the screws or bolts b. The keyKis inserted'in the slot Aa and through the slot in the connecting-rod J, its ends restingin the slots of the collar L. The sleeve L2, having its interior properly babbitted, is then put in -position upon the collar L, and the trnnions of the lever M insertedin the cavities Zi1 of the sleeve. Theparts are now in operative position. By throwing the free end of the lever along the sector, the bar G2 is reciprocated, and, by reason'of the inclined ribs thereon meshing with the similar ribs on the bars F2, the eccentric is thrown across the shaft to any desired extent, and is retained in such position by means of the notches in the sector.

In Figs. 11 and 12 are represented on a large scale a portion of the crank-shaft A, its sliding collar, sleeve, and operating lever. The external bearing-surfaces of the sleeve L2 that connect it to the lever M are more extensive than in the previously-described figures to reduce the wear of the parts; For this purpose each half of the sleeve has upon its surface a boss or trunnion, L, provided with series of concentric Ushaped grooves, Z6, and thetwo halves, M', forming the inner end of the lever M, have cavities m to receive the bosses L3, and a sufficient amount of ,Babbitt or antifriction metal poured between them and the concentric' grooves Z6. By this arrangement the fricti'onal surfaces do not require any adjustment. The halves M are IOO IIO

united at one eud bythe bolt m2'a11d at the other by the bolts m3 m" The bolt mmay be nsed to adjust the parts after tiling or fitting the joint m5 adjacent to said bolt. The link M3 is provided' with a ball-shaped journal, P, at each end. One end enters a corresponding bearing in the inner end of the operating-lever, and the other endis received in asimilar bearing projecting from the shaft-bearing N or some other fixed part. By means of this adjustable ball-joint connection no twistingstrain can be thrown on the lever, and the fitting of the parts need not be so accurate, and consequently it requires less time to properly connect the parts.

Having now fully described my invention and iis operation, I claim- 1. In a shifting-eccentric, governing-bars arranged within and across the shaft and provided with diagonally-disposed ribs upon the sides thereof facing the axis of the shaft, in combination with a diagonally-ribbed bar located within the shaft, substantially as specified. v

2. The combination of a ccntrallybored shaft, an operating-rod, a ribbed bar arranged in the bore, and a governing-bar ribbed upon the side thereof facing the center of the shaft and arranged across the shaft and in engagement with t-he axial ribbed bar, substantially as and for the purpose described.

3. The combination of a bored and slotted shaft, an eccentric mounted'thereonfgovernj ing-bars arranged within 'the eccentric and passing transversely lthrough the shaft, a central bar having ribs adapted to mesh with the ribs of the governing-bars, an operating-rod connecting with the central bar and with a sliding collar mounted on the shaft, and a sleeve connected with a lever, substantially as and for the purpose described.

.whereby said collar is wholly inclosed, substantially as and for the purpose described.

5. The combination of the hollow shaft A,

eccentric E, the transverse ribbed bars F2, the

central ribbed bar, G2, rod J at the end thereof, the split collar L, its sleeve L2, and the lever M, constructed substantially as described, and for the purpose set forth.

6. The combination of a centrally-bored shaft, an operating-rod,a ribbed bar arranged inthe bore, and ribbed governing-bars arranged across the shaft and in engagement with the axial ribbed bars, with a disk, B, eccentric E, having dovetailed base-piece D, and recessed frame C, secured to the disk by bolts, substantially as andfor-the purpose described.

7. The combination of the hollow shaft A, central rod, J, and key K, the'split 4collar L audits sleeve L2, and bosses L3 thereon provided with concentric grooves, with the lever M, made of two halves having cavities m to receive the bosses, substantially as and forthe purpose described. Y'

8. The combination of the hollow shaft'A,

central rod, J, and key K, the collar L, its

sleeve L2, and bosses thereon, with the lever M, having its inner end provided with ballsockets, and the link M3, having ball-journals at each end, substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

' ABRAHAM B. LANDIS'. Witnesses:

D. M. GOOD, Jr.

C. E. BnsoRE.

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