US110352A - Improvement in oscillating steam-engines - Google Patents

Description

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Wim ess es MM Vw @QAM N.PETERS. PHOTQLITHOGRAPHER, WASHINGTON, 11CA ISAAC NEWTON FORRES'IER,` OF BRIDGEPORT, CONNECTICUT.

Letters Patent No. 110,352, dated December 20, 1870.

. lIMPROVEMENT INOSCILLATING STEAM-ENGINES.

The Schedule referred to in these Letters Patent and making parl: of the same.

ATo all whom it may concern Be it known that I, ISAAC NnwtrorrV Fomcnstrnn, of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful -Improvements in Oscillating Steam-Engines, XVater- Engines, and Pumps, of Awhich ,the following is a specicaton. Y

invention relates moreespecially to that class of machines known as oscillating steam-engines; it is kalso adapted to use as a pump for forcing water.

The object of the rst part of the invention is to facilitate the working of the valves by the oscillation of the engine; and

' )Iy improvement 'consists in combining with the working cylinder a slide-valve, working transversely to the axis of the cylinder, and operated by the oscillation ofthe cylinder ou its truuuious.

The object of the next part 'of my invention is to preventwear ofthe face ofthe slide-valve, to keep it truly in line, and to prevent strain on the' valve-rod; and

The improvement consists in combining the slidevalve with the valve-rod, passing entirely through the valve-chest.

.lhe object of the next part of my invention is to operate the slide-valve, in a simple and direct man- Iner, by the oscillation of the valve-chest on its trunnions; and

The improvement consists in combining au oscillating valve-chest, a reciprocating slide-valve, andan oscillating yoke, connected with the valve-stein to move the slidevalve.

`The object of the next part of my invention is to cause the valve quickly to open and close in order to open the valve widely at the commencement of the stroke of the piston; and

The improvement consists in combining an oscillating working cylinder, a slide-valve, moving transversely to the bore of the cylinder in one direction, and a valve-seat, moving in a direction opposite to that of the valve.

The object of the next part of my invention is to facilitate the manufacture ot' the cylinder, and also to afford access to the valves without removingr or disturbing the trunnions on which the cylinder oscillates; and

The invention consists in combiningT with thecylinder, a valve-seat, on which the trunnions are formed, or to which they are secured, and a valve-chest, so constructed that it may be removed from the valvescat without disturbing the cylinder, valve-scat, or truuuious.

Io further secure the object last described, the improvement consists in combining the bed-plate or frame, the valve-seat, oscillating ou trunnions in the bed-plate, the cylinder, mouuted'on the valve-seat, the

valve-chest, the valve, and theoscillating yoke which moves the valve. v

The next part of my invention relates to the engine when used as aA pump; its object is to prevent the concussion ot. the water iu the working cylinder as the stroke is reversed; and y The improvement consists in'inserting a cushion of India rubber or other equivalent elastic material in each end of the working cylinder, the elasticity of which cushion lesseus the concussion of the water against the cylinder-heads as the stroke is reversed.

In the accompanying thawing, whichy shows so much of my improved engine as is necessary to illustrate the invention herein claimed- Figurel is a side elevation.

Figure 2, a plan or topview of the valve, the valvechest, and the parts below it, the valve-seat and truni nious heilig shown iu dotted lines.

Figure 3, a vertical central section through the enf gine, at right angles with the truuuious.

Figure/1, a similar section through the truuuious.

rIhe workingcylimler A, instead of being east with trunnions, as usual, is cast as a simple cylinder, with the flange a2 and ports a al formed thereon.

A piston-rod, b, connects the piston-head B with a crank, in the usual way,

'Ihe valve-seat- C has hollow truunions, C1 C", formed on its sides and mounted in properjournais, D, ou the frame or bed-plate E. The valve-seat is provided with proper ports for the passage ofthe steam, and serves as a head for the cylinder.

The valve-chest F is arranged beneath the valveseat. I

rIhc plate or cover G for the valve-chest, the valvechest, the valve-seat, and the cylinder are allfrmly clamped together, by through bolts and nuts, f, in the usual way.`

The valve II slides on its seat in the usual way.

This valve is mounted on arod, I, which passes entirely through the valve-chest, and moves freely, endwisc, through pipe-box bearings, c', en the chest.

rIhe ends of the valve-rod pass Ythrough the ends of a yoke, J, which passes around the valve-chest.

'A fork or notch, la, on this yoke, embraces a stop or cross-bar, K,on the frame.

In operation, the steam enters the valve-seat through the trunnions Cl, and passes through the port c to the side of the valve opposite the cylinder; when the valve opens",` it passes alternately into the opposite ends ofthe cylinder, and moves the piston in the usual way. 'lhe exhaust steam escapes .through the trunnions Ci. lhc valve is reciprocated by the oscillation ot' the valve-seat, and the yoke causes it to move in a direction opposite to that ot' the valve-scat,

l val ve-l'od.

The valve may be readily removed, for repairs, Sac., by taking off the valve-chest cover and slacking the ,set-screw which secures the valve to the rod, and withdrawing the rod from the valve-chest. This then allows thefvalve-chest to be removed from the valve seat, whereby access may be had to the valve and valve-seat for repairs, and for other purposes.

-I have described my improvementY as a steam-engine; obviously, it would work wellas a Water-engine, or as a pump. v

I do not broadly claim the combination of an oscil. lating cylinder with a reciprocating valve.

1 claim as my inventionl 1. lhe combination of the oscillating cylinder with the slide-valve working transversely across the bore of the cylinder, these parts heilig constructed to operate in combination, substantially as hereinbefore set forth.

2. The combination of the oscillating valve-chest, the reciprocating slide-valve, and the valve-rod extending entirely through the chest, these parts being constructed to operate in combination, substantially- Vas hereinbefore set forth.

3. The combination of the oscillating valve-chest, the reciprocating slide-valve, and the oscillating yoke,

these parts `being constructed to operate in eombina- -the cylinder, and the valve-seat, reciprocating in a direction opposite to that of the movement "of the valve, these parts being constructed to operate in combination, substantially as hereinbefore set forth.

5. The combination of the cylinder, the'valve-seat, having trunnions on which the cylinder oscillates, and the valve-chest, oscillating Ywith the cylinder, these parts being constructed to operate in combination. substantially as hereinbefore set forth.

6. The combination of the bed-plate, the oscillating cylinder, the valve-seat, the trunnions, the valve-chest, the valve, and the-oscillating yokefall these partsbeing constructed to operate in combination substantially as' hereinbefore set forth.

7. The combination, withthe eylindeP-'of a pump or waterengine, of elastic cushions at each end of the cylinder, to .deadenv the concussion v.of the' water on the cylinder-heads, as hereinbef'ore set forth. Y

In testimony whereof I have hereunto subscribed my name.

` I. N. FOR-BESTER.

NVitne'sses Jon. I. PEYTON, BALTIs Dn LONG.

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