US1672168A - Valve-operating mechanism - Google Patents

Description

June 5, 1928. 1,672,168 T. E. PARADISE VALVE OPERATING MECHANI SM Filed Oct. 21, 1926 5 Sheets-Sheet l h anon 1410a wamm ZZUZZQQIQQ T. E. PARADISE VALVE OPERATING MECHANISM June 5, 1928.

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T. E. PARADISE VALVE OPERATING MECHANISM Filed Oct. 21, 1926 3 Sheets -Sheet xmamaaraaamxx ill 5] ffj araaQlse,

witness Patented June 5, 1928 i UNITED, STATES 1,672,168 PATENT orrlca.

THOMAS E. PAR ADISE, OF HANNIB AL, MISSOURI.

VALVE-OBERATING MECHANI ISM.

Application filed October 21, 1926. Serial No. 148,189.

The present disclosure of the invention relates to improvements in locomotive reverse gears of the WValschaert type, embodying a rod connected with the slide valve, a lap and lead lever linked at 1ts lower end to the usual cross head and connected near its upper end with the valve rod, and a radius rodto which said lever is fulcrumed at said upper end, said radius lead lever with respect to the valve rod, but.

the disclosed structure of that patent, is

5 rather expensive and" complicated@ It is therefore the aim of the present invention to provide a new and improved construction and arrangement of parts for efi'ecting thedesired, sliding of the aforesaid lever. I

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawings. 9 p Fig.1"is aside elevation of a locomot ve valve ear improved in accordance with my invention, the radius rod beingset at its neutral position with regard to the revers in link. V V ig 2 is atop plan view of, most parts shown in Fig. 1, other parts however being omitted.

3 is an enlarged vertical transverse sectionas indicated by the lines- 33 of Figs. 1 and 2. v

Fig. 4 is a vertical sectional view on the correspondingly numbered line of Fig. 3.

Fig. 5 is a side elevation of the bracket v late'hereinafter described. v i Fig. 6 is a vertical section on the l ne 6'6ofFig. 5.

Figs. 7 and 8 are respectively an upper edge View and a side elevation of a bell crank which is fulcrumed to the bracket,

plate-of Figs. 5 and 6 and is operatively connected with the radius rod.

Figs 9 and 10 are respectively a side elevation and a sectional view of the lap and lead lever, Fig. 10 being cut substantially on line 10-10 of Fig. 9.

Fig. 11 is a transversesection on line 1111.of Figs. 1 and 2, illustrating the preferred manner of connecting the bell crank with the radius rod, by means of a slide.

Figs. 12 and 13 are elevations of the outer and inner-sections of the slide shown in Fig.11.

'Figs. 14. and 15 are sectional views on the correspondingly numbered lines of Figs.

A 12 and 13.

Fig. 16 is aside elevation of the eccentric which is rotated by means of the bell crank lever. to eflect vertical sliding of thelap and lead. lever.

Fig. 17 is'a vertical section on line17'17 of Fig. 16..

Fig. 18- is a horizontal sectional View taken on the line l8 18 of Fig. 3. I

In the drawings above briefly described, illustrating the preferred form of construction, 18 designates the steam chest of 9. cyl-. inder 19, the piston of this cylinder being connected by the usual rod 20 with the cross head 21, which cross head is connected by a pitman 22 with a main "crank 23 on one of the drivers 24 of a locomotive. Secured to crank 23 is the well known auxiliary crank 25 which is linked at 26 to the reversing link 27. This reversing link has a sliding connection 28 with the rear end of a radius rod 29, the front end of this rod 29 carrying a,

bolt or the like 30 upon which the upper end of the lap and lead lever 31 is fulcrumed, the lower end of this lever being linked at 32 to the cross head 21,'in the well known way. A slight distance below the fulcrum 30, the lever 31 has a sliding connection with the valve rod 33, extending out of the steam chest 18., In the present showing, 'lever 31 is formedwith a vertical slot 34 slidably receiving a block 35, andv a pivot pin 36 passes through this block and connects it with the arms 37 ofa U-shaped slide 38 secured to the rear end of the valve rod 33. These arms lever31, and if theconnection28 of the radius rod 29 is above or below the fulcrum of the reversing link 27, said radius rod also moves the upper end of said lever 31 to and fro, and the compoundu'novement imparted to this lever by the reversing link and cross head, causes it to operate the valve rod 33 in the well known way. In order to vary the lap and lead of the valve, it is only necessary to verticallyadjust the lever 31, so as to vary the distance between the fulcrum 30 and the pivot pin 36. Theimprovements which I have made and will now describe,

eifect this vertical adjustment of lever 31, in an eflicient manner. I

A vertical bracket plate 41 is secured by bolts or the like 42, to the outermost ofthe arms 40, which arm is slotted at 43, for a purpose to appear. The lower end of the bracket plate 41 is provided with any desired vertical guideway 44 with which a slide 45 is engaged, said slide carrying a pivot bolt or the like 46. To the outer end of this bolt, a vertical link 47 is pivotally connected at its lower end, while a second vertical link 48, disposed at the inner side of said plate 41, has its lower end. pivoted upon the inner end of said bolt 46. V The upper end of link 48 passes through; the slot 43 and-is pivoted upon the fulcrum 30 of the lever 31, as best illustrated in Fig. 8.

I The upper. end of the link 47'is pivoted at 49 t0 an eccentric 5O which,at 51, is rotatably supported at .the outer side of the bracket plate 41. This eccentric, in the pres ent disclosure, is provided with peripheral gear teeth 52 meshing with a gear segment 53. This gear segment is secured by bolts 54, in the present disclosure, to a downwardly projecting arm 55 of abell crank lever 56, which lever is fulcrumed at 57. to the upper end of the bracket plate 41. The other arm 58 of the bell. crank 56, extends rear-- wardly from the fulcrum 57 and is con- 'nected with the radius rod 29. In establishing this connection, I preferably pivot the arm 58 at 59 to a slide 60 which slide is mounted for movement along the. radius rod 29. This slide preferably. comprises an outer body section 61, an inner section 62, and bolts 68 connecting said sections, the various details of this slide being fully illustrated in Figs. 11 to 15 of the drawings.

By the constructionand relation of parts above described, vertical swinging of the radius rod 29 about the fulcrum 30, causes swinging of thebell crank '56 about its fulcrum 57, thereby rotating the eccentric 50 through the instrumentality of the gear segment 53 and the gear teeth 52. This rotation of the eccentric on the gear 50, vertically moves the link 47 and the latter in turn -similarly moves the slide 45 mounted in the slot 44 in the lower end of the bracket 41 and link48 which is connected with the slideas clearly shown in Fig.3, causing the'latter to vertically slidethe lap and lead lever 31 to which the upper end of the link 48 is connected by the bolt 30, with respect to the valve rod 33, sothat the lap and lead of the valve will be properly controlled by mere adjustment of the radius rod 29 also mounted on thebolt 30, in the requisite manner.

Not only is the new construction herein disclosed, more simple and less expensive than that disclosed in the patent above referred to, but it is more compact, andnoparts project to any great distance above the valve rod. Thedetails herein disclosed will produce excellent results and they are jacent said lever; an eccentricrotatably mounted on said supporting means, pivotally connected links operatively connecting said eccentricwith said lever for shifting the latter transversely of'the valve rod when the eccentric is rotated, means slidably connecting the pivotallyconnected ends of said links with said supporting means to guide the movement of. said links, and means op-v eratively connecting said eccentric with said radiusrod for rotating the former when the latter is swung about theifulcrum of the I aforesaid lever.

2. In a valve operating mechanism embodying a valve rod, a lap and lead lever transverse to the valve rod, connecting means between the lever and rod permitting sliding of the formertransversely of the latter, a radius rod to which one end 'of said lever is fulcrumed, means connected to the other end of the lever for oscillatingthe lat; ter and stationary supporting means adj scent said lever; a rotatable member mounted, on said supporting means and having gear teeth, a bell crank fulcrumedl on said 'sup 7 porting means on an axis transverse to said radius rod and having a gear segment atone end meshing with-said. gear teeth,- the other end of said bell crank being connected with said radius rod to be moved by'swinginglof the latter about the fulcrum of the aforesaid lever, whereby to effect rotation'of theaforesaid rotatable member, and means "operatively connecting said rotatable member with said lever for sliding the lattertransversely of the valve rod when said" member is rotated.

3. In a valve operating mechanism embodying a valve rod, a lap and lead lever transverse to the valve rod, connecting means between the lever and rod permitting sliding of the former transversely of the latter, a radius rod towhich one end of said lever is fulcrumed, means connected to the other end of the lever for oscillating the latter, and stationary supporting means adjacent said lever; an eccentric rotatably mounted on said supporting means, pivotally connected links operatively connecting said eccentric with said lever for shifting the latter transversely of the valve rod when the eccentric is rotated, means slidably connecting the pivotally connected ends of said links with said supporting means to guide the movement of said links, a bell crank fulcrumed on the supporting means and having a gear segment on one end, said eccentric being provided with gear teeth meshing with said segment, and connecting means between the other end of the bell crank and the radius rod to swing the former upon movement of the latter about the fulcrum of the 7 aforesaid lever, thereby causing rotation of the eccentric and consequent shifting of the aforesaid links to slide the lever transversely of the valve rod.

4, ha locomotive valve gear, embodying a valverod, a lap and lead lever connected thereto near its upper end for vertical sliding, the lower end of said lever being linked to the usual cross head,and a radius rod to which said lever is fulcrumed at its upper end; a bell crank fulcrumed to a stationary support at one side of said lever and having one downwardly projecting end and one rearwardly projecting end, connecting means between said rearwardly projecting end and said radius rod to swing the bell crank when its lower end to the usual cross head and con nected for vertical sliding with the valve rod near its upper end, and a radius rod to which said lever isfulcrumed at said upper end; a

rigidly mounted bracket plate in outwardly spaced relation with said lever, the lower end of said plate having a vertical guideway, an eccentric mounted at the outer side of said plate above said vertical guideway and having gear teeth, a link connected with said eccentric and depending therefrom, a slide in said vertical guideway to which the lower end of said link is pivoted, a second link at the inner side of the plate pivoted at its lower end to said slide and pivoted .at its upper end to the aforesaid lever at the fulcrum of the latter, and. a bell crankfulcrumed to the plate and having a downwardly projecting end provided with a gear segment meshin with the ear teeth of the eccentric, the other end of said bell crank.

extending rearwardly and being connected to said radius rod, whereby swin ing of this rod about the fulcrum of the aforesaid lever, will cause said gear segment and gear teeth to rotate the eccentric, the latter then moving said links and the associated slide to effect vertical sliding of the lever with respect to the valverod.

In testimony whereof I have hereunto afiixed my signature.

THOMAS E. PARADISE.

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