US8706A - Epheaim morris - Google Patents

Description

NUNITED s'rArEs EATENT otrrioE EPHRAIM Monns, or' NEW roeien. Y.

`i/IETHOD or KEEPING THE vAnvEs or` 'osoILLATING ENGINES UPON THEIR SEATS.

` Specification of Letters Patent No. `Y8`;'706 dated February `3', 1852-;

To all whom 'it 'may concern:

Be it known that I, EPHRAMMOREIS, of the city, county, and State of New York, machinist, have invented, made, and applied to use certain new and useful Improvements in Oscillating Steam-Engines; and I hereby declare that the construction, operation, and etlec-ts of the said improvements are fully and substantially set forth and shown in the following description and in the drawing annexed to and making part of this my speciiication thereof, wherein-4 Figure l, is a plan, Fig. 2 is a side elevation, on the` side A, of Fig. l, Fig..3, is a cross section on the line B, O, showing the induction steam passages and Fig. 4, is a longitudinal section at the lineD, of Fig. 1, showing' the internal form of the steam passages on cach` side, and the mode of i'itting the parts that form the valve Ways for the steam in the induction and eduction.

The like marks of reference denote the corresponding parts in all the figures.

E, is the bed frame fitted with a pair of standards a, a, on each side; b, b, are jour-` nal boxes carrying the trunnions c, c, of the oscillating steam cylinder F, which is tted `with heads, pistonpiston rod and stutiing box and side steam ways d, eZ, to the steam port-s, all as now usually made. Over the trunnions on each side the steam` ways are raised to form a segment curve e, concentric with the trunnions and fitting under the curve el, of each leg of the steam chest Gr, the steam ways in which are shown by dotted lines in Fig. l, and in section in Figs. 3 and 4, the induction ways being denoted by 3, 8, are connected together by an opening through the center of the steam chest and to the induction pipe h; the eduction ways 4, 4, are connected by a semicircular opening surrounding the induction pipe with the eduction pipe i; the valve seats e, e,

`have. steam ways l and 2, connecting with the steam ways d. Each end f, j", of the steam chest Gr, is made to fit between the upper ends of the standards a, a, and is made hollow as shown in Fig. 3, to admit steam to act under pressure plugs 5, 5, at each end which take under caps g, g, secured and adjusted by screws 6, 6. At 7c, is

`the connection of the piston rod to the crank Z, on the shaft 7.

The operation is as follows; the steam enters by the steam ways 2, and 3, Fig. 4,

into the steam ways on each side of the cyl# inder, and acts on thepiston the steam passingin the direction ofthe arrow 8, see Fig. 4, and the exhaust passing olf in the direction of the arrow 9by the ports l and 4, the motion of the cylinder as it oscillates by the rotation of the crank causing the valve seat e, to move under the valve e1, allowing the steam to enter and exhaust as required; the arrangement of the parts and their operation being the same as usual where the ways are through the trunnions.

The ordinary steam chests used in oscillating steam engines are usually secured down by screws and worked with the pressure they are intended for, but if less pressure of steam is used the valve grinds and wears unnecessarily and when greater pressure is put on, the parts expand and the steam chest being secured rigidly in place very often causes a leak between the valves and also the excess of pressure tends to lift the steam chest. To remedy this the plugs 5, 5, are introduced and fitted to slide steam tight in their places immediately under the caps g, g, so that the steam pressing under the plugs raises them against the caps which being secured causes a reaction of the steam on the lower part of the steam ways and chest that forces the chest bodily downward upon the convex valve seat e, e, on each side so that the higher the pressure of the steam the more effectively the steam chest is de pressed on to the convex segments and the area of each plug being a little more than equal to the area of the steam ways onone side there is a pressure downward always greater than the pressure tending to separate the steam chest from the valve seat and consequently the valve and seat are keptl tight under all pressures without unnecessary friction and wear and the pressure is adjusted by the steam itself.

Oscillating steam cylinders have been made that admit and exhaust the steam through the trunnions, and others have been made that admit and exhaust the steam in the upper or lower part on the central line of the cylinder, and some have been made to admit and exhaust at the sides but I do not know of any oscillating engines in which the steam 4is admitted or exhausted :at the sides in combination with a means of making the pressure of the steam act to keep the steam chest down on the working parts ifalves onto the seator seats of the saine as described and shown.

In Witness :whereof I have hereunto set my signature this twenty-sixth day of De- 15 Y cember one thousand eight hundred and fifty-one.

` EPHM. MORRIS. l/Vitnesses W. SERRELL,

LEMUEL W. SERRELL.

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