US59442A - Improvement in steam-governors - Google Patents

Description

UNTTEDl STATES PATENT OEEIOE.

IMPROVEMENT IN STEAM-GOVERNORS.

Specification forming part of Letters Patent No. 59,442, dated November 6, 1866.

To alt whom fit may concern:

Be it known that I, GEORGE E. NoYEs, of Washington city, in the county of Washington, and in the District of Columbia, have invented a new'aud useful Mode of Operating the Governor-Valves of Steam-Engines, especially adapted to marine engines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification.

In the drawings, Figure 1 is a section, longitudinal through the valve and its operatin g mechanism, and transverse through the cylinder and steam-chest. Fig. 2 is a section, longitudinal through the steam-chest and cylinder and governor-pipes.

My invention consists in operating the governor-valves ot' steam-engines by means ot' steam alternately admitted from opposite ends ofthe cylinder to a piston-head on the outer end of the valve-rod, so that the pressure of the steam in the cylinder shall open or clos the valve more or less.

A represents the steam-cylinder; B, the steam-chest; C, the governor-valve.

The valve-rod D extends beyond the valve a foot or more, and is provided with a pistonhead, E, working in a small cylinder, F. The

piston works in a suitable packing-box, and is balanced by means of a spring, G, placed behind it, which is regulated by a screw, S. I and J are the two governor-pipes leading from the cylinder-heads (or from points in the cylinder on each side of its center) to the governor-cylinder F.

The valve shown in the drawingis a slidevalve, and it is supposed that a valve of that `class will be generally used with my device for governing it.

In the operation of my invention the valve G is so adjusted that when the governor is at rest the valve-ports will be partially open, so as to admit sufficient steam to the cylinder to operate the engine Without machinery. In

this condition the engine Will continue to operate without any material effect upon the governor, though the steam from the cylinder presses against the governor-piston, for that piston is so balanced as to resist the steampressure when there is no work for the engine; but Whenever the engine is driving machinery the steam, as it presses with greater force against the main piston, will, through pipe I, press with correspondingly increased force against the governor-piston E, thereby proportionally opening` the valve-ports and admitting morev steam to the main cylinder A. y

The spiral spring G at theend of the stroke throws-back the valve to its normal position. The valves H H', at the lower end of pipes I and J,'alternately open and close, respectively, as the steam ows into pipes I and J.

the stroke of the piston changes to the return stroke, the steam on the other side of the piston in like manner flows into the pipe J and governor-cylinder F, and proportionally opens the valve C by its pressure'upon the governor'- piston E.

Thus it will be seen that, by this simple construction, I make the quantity or pressure of steam in the cylinder A open the valve G in the desired degree, and govern the admission and cut-off of the steam without the Waste power and expense of the ordinary governor. I claim as my invention and desire to secure by Letters Patent- Operating within a supplementary cylinder a piston, E, and combined with the governorvalve, when so arranged that the steam which operates the said piston is taken from the main cylinder A by passages Aleading therefrom, substantially as shown and described.

In testimony that I claim the above described invention, I have hereunto signed my name this 7th day of August, 1866.

Gr. E. NOYES. Witnesses:

V. G. CLAYTON, J. F. CALLAN.

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