US120661A - Improvement in steam-engines - Google Patents

Description

mos NEUERT.

lmproveme nt in Steam'Engines.

No. 120,661. w Patented Nov. 7 ,-1s-7 1 UNITED STATES PATENT ()FFICE.

JACOB NEUERT, OF SANDUSKY, OHIO.

IMPROVEMENT IN STEAM-ENGINES.

Specification forming part of Letters Patent No. 120,661, dated November '7, 1871.

ing had to the accompanying drawing and to the letters of reference marked thereon making a part of this specification.

The object of this invention is to make a cutoff valve for steam-engines which shall be simple, comparatively cheap, and easily adjusted.

. The invention consists in applying to the back of the ordinary slide-valve a second valve or cut-off valve of triangular shape, which alter-. nately covers and uncovers corresponding an gular ports through the back of the slide-valve, and also the manner of regulating it, as hereinafter described.

In the accompanying drawing, Figure 1 represents a plan or top view of steamchest with cover removed, showing my invention. Fig. 2 a cross-section taken in the line x 00.

Similar letters of reference indicate like parts in the several figures.

A represents the steam-chest of the cylinder of a steam-engine constructed in the ordinary manner, and of any desirable shape and size. Into this steanrchest is fitted the slide-valve B, which alternately covers and uncovers the ports 0 .0 as is common in steam-engines. On the upper surface or back of the valve B are cast two raised faces, D D through which are formed the angular ports E E Resting upon said raised surfaces D D is a second or cut-off valve, F, which slides across said surface by the action of an eccentric or otherwise. This cut-off valve has bearing-surfaces a a of the same angular shape as theports E E and having also bearingsurfaces 1) b, which bear or slide upon the adjustable surface G, as shown in Fig. 1. This bearing surface G is of peculiar construction, in that upon its lower side are formed two wedges, 0 0, the angular faces of which rest upon the angular faces of the corresponding wedges d 01. Now, as will be readily seen, when steam is admitted to the steam-chest A, it will pass into the port E, and thence through the valve B, and through the ports O G to the cylinder, and so on alternately through the ports E E, as they are uncovered by the valve F as it is moved by the action of an eccentric, the exhaust steam of the engine passing under the valve B, and so.

outward, as in an ordinary steam-engine. It is obvious that if the areas of the ports E E are contracted, less steam will be admitted to the cylinder in the manner just described,and a great saving be effected thereby. Therefore, to effect this, the valve F may be so adjusted as will permit the angular edges thereof to lap more or less, or entirely over the ports E E and this adjustment is effected by means of the wedges d d, which are so constructed that they may be moved horizontally by means of the lever f, or by any other desired means; for, as said wedges cl d are so moved, their under surface sliding against the fixed side of the steamchest, the valve F will be raised more or less through the action of the wedges d d, and thus allow the inclined edges of said valve to lap over the ports E E and the lower wedges d d may be adjusted, if necessary, to entirely out off the steam to the cylinder at any part of the stroke it is wished, the adjustment being fixed in position by the set-screw 0'.

Instead of operating the wedges by means of a lever, f, they may be connected in any desirable manner with the regulator or governor of the steam-engine, and in this way an excellent variable cut-oft is bad, without the use of complicated and expensive machinery, such as is generally employed to produce this result.

I do not wish to confine myself to any particular construction of the cut-off valve above described, or its means of application but -What I claim as new, and desire to secure by Letters Patent, is-

1. An adjustable cut-ofi' valve, F, of angular shape, sliding upon the back of a slide valve, B, to alternately cover and uncover ports E E made at corresponding angles in said slide valve, substantially as and for the purpose specified.

2. The bearing-surface Gr, having inclined or angular faces 0 c, in combination with the corresponding angular faces at 01, substantially as and for the purpose set forth. I

3. The inclines or wedges c c and d d, for adjustment of the valve F, as and for the purpose described, when said wedges d d are operated by a fixed lever or governor.

JACOB NEUERT.

Witnesses Louis TRAUB,

JACOB BAUBAGH. (150)

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