US155838A - Improvement in steam-governors - Google Patents

Description

l. D. LYN DE.

Steam-Governors.

Patented 0ct.13,1874.

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UNITED 'STATES PATENT CFFICE.

JOHN D. 'LYNDE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN STEAM-GOVERNORS.

Specification forming part of Letters Patent No. 155,838, dated October 13, i874; application filed August 21, 1874.

To all whom it may concern:

Be it known that I, JOHN D. LYNDE, of Philadelphia, State of Pennsylvania, have invented new and useful Improvements in Steam- Governors; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed'drawings forming part of this specification.

The object of this invention is to provide a valve and valve-seats for steam-governors, which will, by being entirely steam-balanced in all circumstances, obviate the difculty and wear heretofore produced by the valve being suddenly unbalanced when Vlarge supply of steam is required for the engine; also, to combine a stop-valve with `the valve and valvechamber or body of a vertical valve-governor, so that the steam can be throttled at the induction-pipe of the governor, obviating the necessity of a separate stop-valve.

It is found that all governor-valves made of the spool or puppet style, although the disks are made of equal size, will be thrown out of balance when suddenly required to pass large amounts of steam. This is very evident when in use on puppet-valve engines. The valves being suddenly jerked open by cams and as suddenly closed, the jerk caused on the works of the governor is akin to a blow at the bottom of the valve. Another difiiculty has been that the supply of steam becomes irregular, one stroke getting more than the necessary supply, the next less, and so causing irregularity of speed and undue wear to the engine. Attempts have been made to remedy this serious difficulty by using very heavy revolving weights or balls, or by running at a high speed, either case causing much wear on all the parts of the governor and strain of the engine.

Having thus described the nature and object of my invention, referring to the drawings, the following is the description:

My said invention consists in the construction of a double cup-valve and the valve-seats with reference to the steam-passages of each, so that the valve is, under all circumstances of increase or diminution of the load of the engine, or of the pressure of steam and opening of the steam-passages, in perfect balance or equilibrium of pressure; also, in the devices, as shown and described, whereby to admit the quantity of steam for the maximum amount of work to be done, which is accomplished by the valve-stem and its yoke surrounding the pin connecting the two cups of the valve, and thereby to actuate the stop or throttle valve.

Figure 4 is a horizontal section; Fig. 5, a longitudinal section; and Fig. 6 (exhibit to explain the difculty described) is a longitudinal section of a governor valve chamber or body, in which a spool or two-disk vertical valve is used, the valve N being shown having guides beneath each disk.

Disks B and C, Fig. 6, are of equal size or diameter, and both close within their respective seats at same time. When so closed they exactly balance steam pressing against the bottom of B the same as on the top of C; but when the valve is raised to let steam pass by disks B and C, as shown by the arrows, the tendency is to throw both disks upward, the currents of steam acting as a pry as they force under each disk. Now, as when closed disks B and C balance each other, a plan is shown in Fig. 5 by which said balance is sustained while steam is passing through the governor. R is a valve formed by connecting together two cups by their respective bottoms, centrally, by a solid pin of metalwhich may be cast with the cupsfixing them together at the proper distance from each other. The bottoms of these cups correspond to the disks B and C, Fig. 6. About central in the sides of the cups are openings or ports, in width nearly one-third the depth of the cup, as shown with arrows through them, Fig. 5. These openings may be made by an entire division of the sides of the cup by an annular incision the width of the required ports, the parts bein g held together by the braces or ties T; or ports may be cut through, as at T. The valve-Seats are short cylinders, S and S', with ports cut through their sides corresponding to the ports described in the sides of the valve-cups. The cylinders S and S are screwed or otherwise set into the partititions or holders S and S", the upper one suspended so as to place the ports below the holder S, and the lower set so as to rise above the holder S" correspondingly with the upper one, thus making full connection with i space Z. The valve R is made of proper length so that when suspended in pla-ce within the seats or cylinders S and S the ports in the sides of the cups correspond exactly with the ports in the sides of thc cylinders or seats S and S. V is a stop-valve; V', guides bearing againstledge V. In large governors a guidestem is also used beneath the valve to insure more perfect seating; also to assist in grinding when necessary. V is a yoke or link connecting the valve V to the screw-stem F by the swivel V. Through the yoke Vl the governor-valve R works, and the stop-valve V is opened and closed at will without interfering with the governor-valve R. A pin is shown by dotted lines J, Fig. 4., which is used to prevent the yoke V from tilting and obstructing the operations of the governor-valve.

The operation is as follows: The stop-valve V being opened by the hand-wheel L, steam Will pass through the ports in S and Sf, and valve R taking the direction of the arrows, steam also presses equally on the bottoms of the respective cups, (described as forming valve R-,) which, being of equal diameters,

remain steadilybalanced-the same as do the disks B and C, Fig. 6, when closed-holding the valve in complete balance, so far as to liability of being unbalanced by the passage of steam by it. Any pressure which maybe caused on top of the valve by reaction from the top of the body A is easily obviated by disk U, which is fully described in my application of April 3o, 1874.

Having thus described the nature of my said invention, what l claim therein as new, and desire to secure by Letters Patent, is*- 1. The valve R, constructed of the two cups provided with openings, as described, and connected together by a pin of smaller diameter, in combination with the valve-seats S and S, substantially as set forth. Y

2. The yoke V, in combination with the screw-stem F, swivel Vm', stop-valve V, govcrnor-valve R, and body A, all constructed and arranged substantially as herein described. JOHN D. LYNDE. Witnesses:

ALEXANDER FOGEL, JOHN H. SEBoLD.

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