US447603A - ohandlee - Google Patents

Description

3 Sheets-Sheet 1.

(N6 fiodel.)

N. CHANDLER. GUT-OFF GEAR FOR ENGINES.

No.447,603. Q a: Patentgglvm. 3,1891.

wwm I .lmwrill I (No Model.) 3 Sheets-Sheet 2. N. CHANDLER. CUT-OPP GEAR FOR ENGINES.

&; Patented-Mar; 3, 1891.

No. 447,603. H

'ro-Llrum, WA$HINGTUN D c (No Model.) 3 SheetsSheet 3 N.-CHANDLER.

OUT-OFF GEAR FOR ENGINES..

No. 447.603. Patented Mar. 3, 1891,

UNITED STATES PATENT FFICE;

NOEL CHANDLER, OF HEDNESFORD, ENGLAND.

CUT-OFF GEAR FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 447,603, dated March 3, 1891.

Application filed September 5. 189i). Serial Nox 364,083. (No model.)

To all whom; it may concern:

Be it known that I, NOEL CHANDLER, a subject of the Queen of Great Britain and Ireland, residing at Hednesford, in the county of Stafford, Kingdom of Great Britain and Ireland, have invented Improvements in Out- Qlf Gears for Engines, of which the following is a specification. I 7

My invention relates to fluid-pressure engines in which the cut-off is varied in an automatic manner by means of a rotary governor that varies the angular position of an eccentric, which through suitable connections operates the distributing or cut-off valve; and the object of my improvements is to so construct and arrange the parts that the rotary governor is located outside the crankshaft bearing, (and consequently outside of the crank-chamber in case of an engine constructed with such chamber,) so as to be readily accessible, while the eccentric itself is on the inside of the crank-shaft bearing and consequently within the crank-chamber, if there be one. I attain these objects by the con struction and arrangement of mechanism illustrated in the accompanying drawings, in which Figure 1 shows in vertical section in the plane of the axis of the crank-shaft so much of an engine as is required to enable my invention to be understood. Fig. 2 is a plan on the line A B of Fig. 1. Fig. 3 is a detail view of the governor hereinafter described, and Fig. at is a detail View illustrating the connection between the governor-spindle and the eccentric.

The same numerals where they occur in different views relate to the same parts.

My invention can be employed in both single-acting and double-acting engines and for operating either a distributing-valve or a cut off valve. lVhen a cut-off valve is employed with a main distributing-valve, the admission, exhaust, and compression points of the piston-stroke are controlled by the main valve, which always maintains its relative position with the piston. The cut-off valve in this case controls only the cut-off of the workingfiuid. With a low rate of expansion a separate cut-off valve may be dispensed with, and the cut-0E can in this case be varied by operating the distributing-valve. In each case the valve, the point of cut-off of which is to be varied, is actuated through some suitable connection from an eccentric, such as hereinafter described, controlled by a rotary governor arranged outside of the crank-shaft bearing and having its spindle passed through a part of the crank-shaft and connected to said eccentric.

' In the example illustrated the means for operating the valve from the eccentric comprise a rod 1, a lever 2, a rock-shaft 3, a lever at, an eccentric-rod 5, and an eccentric-strap 6, surrounding the eccentric 7. This eccentric '7 is made with an elongated eye for the passage of the driving-shaft 8 (herein called the crank-shaft) and with arms or lugs in one with or directly connected to said eccentric, and is at a point within. the hearing of its strap journaled on a pin 9, driven from the crank-shaft, (which pin is shown as fixed to an extension 10 of one of the crankarms 10,) as described and claimed in the specification of Letters Patent of the United States issued to me the 20th of Way, 1890, No. 428,453, and is connected to a suitable rotary governor through links joined to the arms or lugs of the eccentric. The rotary governor I have illustratedin the annexed drawings comprises Weights 11 11, subjected to centrifugal force and to the force of springs, the two forces acting in opposite directions, as in my said former specification; but according to my present invention said weights are pivoted at diametrically-opposite points 12 12 on the fly-wheel or plate 13, which is fixed on the crank-shaft 8. Said weights have pivoted to them therods 14 14:, carrying the coiled springs 15 15, which abut against theregulating-nuts 16 16 and stops 17 17, fixed to the fiy-wheel or plate, and have, as in my previous arrange ment, a tendency to oppose the outward movement of the respective weights, due to centrifugal force, and in order to establish the necessary connect-ion between the governor thus located outside the crank-shaft bearing 18 and the eccentric 7, located at the inner end of said hearing, (within thecrank -chamber 19,) I, according to my present invention, adopt the following arrangement. The weights 11 11 are connected by links 20 20 to lever arms or projections 21 21 fixed on a spindle which passes through an axial hole in the crankshaft S and has fixed to it at its other end two lever-arms or projections 23 223, each connected by means of a link ill or 24; to one of the arms or lugs 25 25 of the eccentric 7.

The mechanism above described will operate similarly to that described in my former specification, above referred to; but by the arrangementof the eccentric and other working parts of the engine at the inside of the crank-shaft bearing 18, while the centrifugal governor is located at the outside of said bearing, complete accessibility is afforded at all times to the governor.

It will be evident that, if desired, the cut-off valve or its spindle might be connected directly to the eccentric-rod without the intervention of the lever 2, rock-shaft i3, and lever 4.

hat I claim is- 1. In a cut-off gear for engines, the combination of a shaft, a shifting or cut-off eccentric driven by said shaft and located at the inner end of one of the shaft-bearings, a spindle that extends through an axial hole or passage in said shaft and is capable of being partly rotated from the outer end of the said bearing, and link-work connecting the said spindle to the eccentric, so that the position of the eccentric can be varied by partial rotation of the spindle, substantially as herein described, for the purpose specified.

2. In an automatic cut-off gear for fluidpressure engines, the combination of a shaft, a shifting or cutoff eccentric driven by said shaft and located at the inner end of one of the shaft bearings, a spindle extending through an axial hole or passage in said shaft, link-work connection between the eccentric and spindle, and a centrifugal governor arranged on said shaft at the outer side of said bearing and adapted to partly rotate said spindle automatically, substantially as herein described, for the purpose specified.

In an automatic cut-off gear, the combination of a crank-shaft, a bearing for same,

an eccentric having an elongated'eye for the passage of said shaft, journaled on a pin driven by said shaft and located at the inner end of said bearing, connections from said eccentric to a cut-oil or distributing valve, a spindle that extends through an axial hole or passage in said crank-shaft, levers fixed to the inner and outer ends of said spindle, links connecting the inner lever to said eccentric, and a centrifugal governor arranged on said crank-shaft outside of said bearing and connected to the lever at the outer end of said spindle, substantially as described.

.1:. In a fluid-pressure engine, the combination of a crank-shaft 8,with axial hole or passage therethrough,a bearing 18 for same, a crank-Web with extension an eccentric 7. having an elongated eye for the passage of said shaft, and arms or lugs 25 25 in one with or directly connected to said eccentric, a pin 9, fixed to said extension 10 of the crank-web and whereon said eccentric is journaled so that it is located between the crank 10 and the before-mentioned bearing 18 at the in n or end of the latter, a fly-wheel or plate 13, fixed to said crank-shaft outside of said bearing, Weights 11 1l,pivotally mounted on said fiywheel or plate, springs 15 15, connecting said weights to said fly-Wheel or plate, links 20, connecting said Weights to lever-arms or projections 21 21, fixed to a spindle 22, that passes through the before-mentioned hole or passage in said crank-shaft, other lever-arms or projections 23 at the inner end of said spindle, and links 24 24, connecting same to the arms or lugs 25 25 of the before-mentioned eccentric, all substantially as herein described, for the purpose specified.

I11 testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses,

NOEL CHANDLER.

\Vitnesses:

GEORGE PEARSALL LOCKER, HENRY ALFRED POWELL, 53 New Street, Birminghcml,England.

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