US100619A - William fiarsen - Google Patents

Description

oii eccentric,

wat" otjljirr;

WILLVIAMQHARSEN, or GREEN POINT,` NEW Yoan.

r Leners' Patent No. 100,619, wed March. s, 1ero.

:hannover/Inru- IN VARIABLE CUT-orf' vALvn-Gnan To all whom 'it may concern: i

, I e it known that I, WILLIAM HARSEN, of vGreen Point, in the county of Kings, and Stateof New York,

-have invented' a new anduseful Improvement in Variable CutfOE Valve-Gear, of which the following is a full, clear, and exact description, reference being had "to the accompanying drawing forming partl of this parts.

My improvement-has referenceto cut-'oli` gears or motions `in which, the supply of steam is `cut oil' at any desired point in `the stroke of an engine by a sec ondary or cut-oil' valve, operated by an adj ustablc ecdrive the m'an valve.

centric, which 4is distinct `from the eccentric Aused to Inthis connection the invention consists, in combination with a.- hollow or tubular crank-shaft and ec centric thereon, for operating the main valve of a secondary eccentric for controlling fthe cut-cti' valve, arranged to rotate. in a planewhich is a paiallelto the first-mentioned eccentric,- but adj ustable in relation thereto, for the purpose of cutting oli` earlier or' later in thestroke by forming thecut-o eccentric'with a hollow sleeve that takes its bearing within the tubular shaft, and has a spil'al Slot` in or along it, through which a follower passes and .projects into a longitudinal l,or straight groove in the interior of said' shaft, so that while `the latter serves to rotate the cut-off eccentric, through gear 'of the follower with fit, said cccentrlcrismade capableof necessary adjustment by" `a Vlongitudinal sliding movement ofthe follower, as

effected by a rmlarranged to project tln'onglrthe cut- Such combination forms a very simple, efcient, and durable arrangement of means, capable ofopeiation either by the governor or by` hand, for establish' ing a variable action to the cut-oil valve.

.Referring to4 theaccompanying drawing- A represents the crank-shaft of the engine', made tubular, as represented in iigs. 2 and 3;

B, the crank; and v i i C, the fixer'. eccentric, for giving motion to the main valve.

D is the secondary or adjustable eccemntric for op-4 `erating the -cutloffvalve,` which may be arranged on back of the nian valve ior controllingthe admission. v

of steam to orthroughthc latter.

This secondary" eccentric D has a 4fixed plane of rof The Schedule referred to in these Letters Patent and making part of the same.

v tation outside of the maineccentric C and parallel to the latter', with which it revolves in common, but is adjustable soas to establish more or less lead to the secondary valve, accordingly as it is required to cut od' earlier' or later in the stroke.

The means lby which this is accomplished are as follows: f

Said eccentric D is formed with 4a hollow sleeve, E,

l arranged to t and rotate within the tubular shaft A,

that serves as a bearing to it. y

This' sleeve carries within it a longitudinally-sliding follower, F, capable of operation from the exterior by a rod, G, arranged to project through the secondary eccentric in the axial direction of the crank-shaft, or thereabout.

This follower F is fitted to project through a spiral Y slot, a, made in or along the sleeve E, and further'- more, to 'enter and lit a straight longitudinal groove, b, formed in-the interior of the shaft A.

` From this description it will beseen that on the sleeve E being restricted from longitudinal movement,

which may be secured by the eccentric D, at one end,

and a collar, c, at the other end ot it, either forward or backward adjustment, in the plane of its rotation, may be given to the eccentric D, to give an earlier or later cnt-off action to the secondary valve` by simply sliding in or out, in the axial direction of the shaft A, the rod G, and of a necessity communicating a corresponding motion to the follower F, which, by its gear with the sleeve E and 'shaft A, throughthe spiral slot a, and straight groove b, turns the eccentric D, as required to effect the necessary adjustmentu of it, said follower F furthermore .Y serving to act as a diiver'to the eccentric D to rotate it in common with the shaftjA.

The rod G may either be slid in or out by hand, through any suitable inea-ns to give any desired amount of eut-oli required, by altering the set of the eccentric D relatively toA clank B or iixed eccentric C, or it may be geared or connected so as to be operated by the governor of the engine. In either case the invention forms an adjustable or variable cnt oi` gear,

which is simple, compact, eiiicient, or easy to work',-

and durable, not liable to get out 0f order, and securl ing an extensive range of ,cut-off action.

.The arrangement of the `spirally-channeled sleeve E of the eccentric D and its follower F, within the lcngitudinally-grooved hollow shaft A of the eccentric C and crank B, as shown and described.

' WM. .HARSEN Witnesses: j

FRED. HAYNES, HENRY PALMER.

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