US734908A - Rotary valve. - Google Patents

Description

No.'734,-908. V PATENTED JULY 28, 1903. J. G. LYONS & D. H. BROWN.

ROTARY VALVE. APPLICATION FILED MAR. 14. 1903.

N0 MODEL.

v m INVENTOR v. a/zzaififi'mlm 9, 90/24, Af/am ey 1 UNITE STAT S PATENT Patented July as,

Fl ICEa JOHN C. LYONS AND DANIEL H. BROWN, OF MCOOMB, MISSISSIPPI;

ROTARY VALVE.

SPECIFICATION: forming part of Letters iPatent No. 734,908, dated July 28, 1903.

Application filed March 14, 1903. Serial No. 147,884. (No model.)

Z?) all whom it may concern:

chest.

vide an improved construction ofbperating- I lever for sucha valve extending through an Be it known thatwe, JOHN C. LYONS an DANIEL H. BROWN, citizens of the United States, residingat McOomb, in the county of Pike, State of Mississipphhave invented certain new and'useful Improvements in Rotary Valves, of which the following is a specifica- .tion, reference being had therein to the ac companying drawings.

This invention relates to a rotary valve, and particularly to an oscillatory balanced valve-cylinder cooperating with a steam- The invention has for an object to provide an improved construction of balanced cylindrical oscillating valve having steam-ports extending therethrough and adapted to com municate with a steam-chest and the inletport to an engine-cylinder.

A further object of theinvention isto proaperture in the valve-casing and protected by packings at the sidesand ends of the valve-cylinder.

Other and furtherobjects and advantages of the invention willbe hereinafter describedv valve-casing, which is provided at opposite sides with steam cl ainbers A, communicatingwithany suitable source of supply, and between these chambers a circular valve-seat B is formed, having at its upperportion a slot B, extending circumferentially thereof, and

at its lower portiouan exhaust-port B with steam ports B atopposite sides thereof. Within the valve-seat B an oscillating cylindrical valve 0 isdisposed, which is provided at opposite sides 'with steam-ports C, extending through the Walls thereof, and with an exhaustpassageC located in the wall 0 at the lower portion of the valve. The valve is also supplied at its upper portion with an opcrating-arm D, extending through the slot B and removably held at its lower end D with a socket D formed in the valve, by means of 1a set-crew D as shown.

An adjustable operating-link D is pivotally connected to the gine by a connection D.

arm D and pivoted lever D and adapted to be operated from any desired part of the en- As shown in Fig.

"l, the steam-chest is adapted to be seated upon a portion of an engine-cylinder, as indicated at E, which is provided with steamports E and an exhaust-port E com mu nicating with corresponding ports in the valvecasing of the steam-chest. For the purpose of admitting steam from the chambers A to lthe interior of the valve G slots or passages ;A are provided at opposite ends of the valve and communicate with both of the chambers at each end, so as to secure an equal pressure of steam.

The valve may be introduced within the steam-chest through the end thereof, which is closed by a suitable head or cap A secured in position, and which bears against a flange 0 extended from the end of the valve to hold the same. against longitudinal movement. This flangeorlip is located at the lower portion of the valve, and the pressure of steam thereon assists in holding the valve upon its seat in-order to prevent the escape of steam l at that point and also to prevent the pressure from moving or lifting the valve. At opposite ends of the valve annular packing-rings F are disposed in suitable recesses and by their outward expansion form a tight joint to prevent the escape of steam. At opposite sides of the valve, between the rings F. longitudinal packing-strips F are located and normally pressed outward by springs within the recesses beneath the same to prevent any escape 'of steam around the upper portionof the valve or through the slot B for the operating-arm. t

' It will be seen that steam admitted to the chambers A of the chest will pass-into the cylindrical valve at its opposite ends through the passages A and by acting upon the flanges C at the ends of the valve hold the same firmly upon its seat. The valve is shown with the engine at rest; but if the operating-arm be moved to the left in Fig. 1 the steam will be admitted to the engine-cylinder through the ports B andE', while an exhaust from the op posite side of the piston is eifected through the opposite set of ports communicating with the exhaust-passage B by means of the communicating passage C If the arm be moved to the right, a reversed operation of the parts occurs. The packing-rings F prevent the escape of any steam from the inlet-passages A while the disposition of the ports 0, extending through the wall of the valve below the packing-strips F, effectually prevents any escape of steam through the slot 13, while the amount of travel of the valve in both directions may be controlled by the adjustment of the connection D with the arm D to any extent. It will be seen that this valve is simple in construction and operation and capable of being formed from a single casting.

By removing the arm I) it can also be readily withdrawn from the steam-chest and when inserted therein is held in accurate position by the heads A v Itwill be obvious that changes may be made in the details of construction and configuration without departing from the spirit of the invention as defined by the appended claims.

Having described the invention and set forth its merits, what we claim, and desire to secure by Letters Patent, is

1. In a rotary valve, a steam-chest having valve-passages at opposite ends, a cylindrical valve openat its opposite ends and located within said chest, and projecting flanges at the lower portions of the opposite ends of said Valve beneath the inlet from the chest; substantially as specified.

2. In a rotary valve, a steam-chest having valve-passages at opposite ends, a cylindrical valve open at its opposite ends and located within said chest, Iongitudinally-projectiug flanges at the opposite ends of said valve be neath the inlet from the chest, steam-chambers in said chest at opposite sides of said valve and communicating with the ends thereof, and casing-heads at the opposite open ends of said valve abutting against the same; substantially as specified.

3. In a rotary valve, a steam-chest having valve-passages at opposite ends and a valveseat with ports at the base thereof, a cylindrical valve provided with ports extending through the wall of the same at opposite sides and below the center thereof and a passage between said ports, and flanges beneath the passages extended longitudinally beyond the body of the valve at the opposite ends of said valve; substantially as specified.

4. In a rotary valve, a steam-chest having a valve-seat at the base thereof, a cylindrical valve provided with ports extendingthrough the wall of the same at opposite sides and below the center thereof and a passage between said ports, flanges at the opposite ends of said valve, longitudinal packing-strips at the opposite sides of said valve above said ports and an operating-arm extending from the upper portion of said valve through an aperture in said chest; substantially as specified.

5. The combination with a steam-chest having an aperture in the upper portion thereof and ports in its base, of an oscillating valve provided with ports in its lower portion, a projection from said valve extending through said aperture, and parallel, longitudinallyextending packing-strips upon the opposite faces of the valve and between the ports and aperture in the'chest; substantially as specified.

6. The combination with asteam-chest having an aperture in the upper portion thereof and ports in its base, of an oscillating valve provided With ports in its lower portion, a projection from said valve extending through said aperture, parallel, longitudinally extending packing strips upon the opposite faces of the valve and between the ports and the aperture in the chest, and packing-rings carried by said valve at the opposite ends of said ports and beyond said strips; substantially as specified.

7. The combination of the steam-chest having ports near opposite ends and independent chambers communicating therewith, a cylindrical valve-seat with solid side walls between said ports, and a hollow oscillating, cylindrical valve having open ends communicating with said ports and longitudinally-extending flanges upon the ends of the valve beneath said ports; substantially as specified.

8. The combination with a steam-chest having an aperture in its'upper portion, of an oscillating cylindrical valve having longitudinal end flanges at the bottom extended beyond the bottom thereof, longitudinal packing-strips in grooves above the flanges, segmental packing-rings on the ends of the valve, beyond said strips; substantially as specified.

9. The combination with asteam-chest having an aperture in the upper portion thereof and ports in its base, of an oscillating valve provided with ports in its lower portion, a projection from said valve extending through said aperture, parallel longitudinally extending packing strips upon the opposite faces of the valve and between the ports and aperture in the chest, a pivoted lever at one side of said projection, a connection between said projection and lever, and means for oscillating said lever.

In testimony whereof we affix our signatures in presence of two witnesses.

JNO. O. LYONS. DANL. H. BROWN. Witnesses:

T. W. JAMES, J. B. WEBB.

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