US299731A - brotherhood - Google Patents

Description

4 sheets-sheet 1.

(No Model.)

P. BROTHERHOOD.

- MULTIPLE CYLINDER ENGINE. 'No. 299,731. Patented June 3, 1884.

(No Model.)

P. BROTHERHOOD.

MULTIPLE CYLINDER ENGINE.

Patented June 3, 1884.

4 SheetsSheet 2.

4 ShetsSheet s.

P. BROTHERHOODQ MULTIPLE CYLINDER ENGINE.

(No Model.)

lia ten t ed June 3, 1884.

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M ziaerzoofl (No Model:) 4 Sheets-8heet 4.

RBROTHERHOOD. MULTI PLE CYLINDER ENGINE.

No. 299,731 PatentedJune 3, 1884.

UNrTE rETEE BEo'rHE EHooD, or LAMBETH, COUNTY or SURREY, ENGLAND.

MULTIPLEFCYLIINDER ENGlNE.

SPECIFICATION forming part of Letters Patent No. 299,731, dated June 3, 1884.

Application-filed November 24, 1883. (N model.) Patentedin England May 18, 1883, No. 2,494.

To aZZ whom it may concern.-

Be it known that I, PETER BRoTHERHooD,

a citizen of England, residing at Lambeth, in

the county of Surrey, .Engla1id, havcinvented an Improvement in Multiple Cylinder Eugines, (for which I have obtained a patent in Great Britain, No. 2,494, dated May 18, 1883,)

of which the following is a specification.

In the specification to Letters Patent No. 28 1372, dated September 4, 1883, Idescribed an improvement in multiple-cylinder engines,

referring to drawings annexed to. the said specification, showing a three-cylinder engine embodying my improvement.

My present invention consists in certain modifications in such engines, whereby I am section. Figs. 2 and3 are vertical transverse sections, respectively, onthe lines X X and Y Y of Fig. 1; and Fig. at is aside elevation.

A is the central cavity, into which the cylinders successively discharge their exhaust,

which passes away by the exhaust-pipe a.

B B is the engine-shaft, with crank O, balanced by eccentric weights 0 G, secured in position by setting screws on the checks of the cranks, which are turned circular for their reception. On abush, O fitted on the crank O, bear the segmentalren'ds of the three connecting-rods D, which are held to it by rings (1, divided in halves bolted together. At the side of each of the cylinders F is the cylindrical slide-easel}, communicating with the cylinder by a short port, 5 and opening at its inner end into .the central cavity, A. The middle part of the slide'case receives supply of the steam or other working fluid by a passage, h, from an annular cavity, H, to which will presently be described. The cylindrical tubular slide-valve K has its inner part larger than its outer part, so that there is always an excess of pressure on the slide inward; As this form of slide, if the case were bored to fit it, could'only be removed from its case by drawing it inward, which would involve great trouble and inconvenience, I bore the outer ends of the slide-cases G larger than their inner ends, and fit them with linings G, which are lips projecting from the covers, and thus, by removing a cover with the lining G belonging to it, I can withdraw the slide K outward. Each of the slides K is'worked by a connecting-rod, it, which has a T-shaped segmental end, with the flanges of the T engaged in grooves in two eccentric sheaves, L, which are bolted together face to face, and fitted on a trunnion formed on the exterior of the bearings for the shaft 13. A pin, Z, entering a slotted hole in the crank of the main shaft, is

a driver for the eccentrics. As the slides K are always pressed toward the eccentric, their rods I: are always under thrust-strain, and therefore there is no noise or shock, such as would result at quick speed-if'the strain were alternately tensive and compressive. The regulatingwalve h is fitted to slide within a casing, which is caused to. revolve with the shaft 13' by a coupling giving a little freedom of end motion. To this rotating casing are hinged the two governor-weights M M, which are formed as bell-crank'levers, their arms engaged in a slot in the stem of the valve h, which stem is pressed inward by a rod sub ject to the strain of an adjustable spring, N.

\Vhen the centrifugal force of the weights M is sufficient to overcome the pressure of the spring N, the valve h is moved toward the right, closingmore or less the passage to the space H from the cavity H, which is supplied with the working fluid by the lateral pipe 7L2.

The eye d, by which each connecting-rod D is. jointed to the piston E, is made tubular, with a slot through'it, which, at a certain part of the stroke, is made to coincide with a slot, 6, through the piston, for the purpose of permitting escape of exhaust, and so relieving back-pressure on the piston, as explained in my patent SpecificatiouNo. 2Si,372.

As the engine whiehI have herein described corresponds in its general features and also 1 B of said shaft, and forming a trunnion with in some of its details with that described in the previous specification No. 284,372, it is to be understood that I make no claim in respect of those features or details; but

I claim only as my present invention-- 1. The combination of the doublesheaves L, having a "l"-shaped eccentric groove for the end of the valve-rod 7:,with a trunnion east on one of the casing-heads, forming also an end bearing for the end B of the crank-shalt, all arranged substantially 'as described.

2. The combination ofthc double sheaves L, having T-shaped eccentric groove forthe end ofthe valve-rod 7;,with a trunnion casten one of the casing-heads, forming an end bearing for the end 13 of the crank-shaft, and said sheaves operated by a pin, Z, secured to the crank, substantially as described.

3. The combination of the crank-shaft of the engine, having an end bearing for the part the double sheaves L,'provided with a T- shaped eccentric groove, and operated by apin, Z, secured in the crank, as specified.

i In combination with an engine having radiating cylinders, a bearing on one of the casing-heads for the end B of the crank-shaft, serving,with its outer surface, as a trunnion, upon which the eccentrics or sheaves for operating the valves are mounted, substantially as described.

In testimony whereof I have signed myname to this specification, in the presence of two subscribing witnesses, this 1st day of November, A. D. 1883.

PETER BROTHER I I00] \Vitnesses:

Join DEAN, J. /Zi'rr, Both of 17 Gracccimrclt Street, London.

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