US335892A - cosfoed - Google Patents

Description

(No Model.) 2 SheetYS-Sheet 1.

, J. C. COSFORDSU J. P. KERN.

STEAM ENGINE GOVERNOR.

180,335,892. Patented Feb. 9, 1886.

wip/Emi- WITNESSES: INVENTOR.

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(NoModel.) 2 Sheets-Sheet 2.

I J. C. GOSFORD 8v J. P. KERN.

STEAM ENGINE GOVERNOR.

No. 835,892. Patented Feb. 9, 1886.

' i INVENTOR,

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WITNESSES:

JOSEPl CASPER OOSFORD AND JOHN PAUL KERN, OF MARQUETTEpMICH.

STEAMQENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 335.892, dated February 9, 1886.-

Application filed September 15, 1885. Serial No. 177,164. (No model.)

To LZZ whom it may concern:

Be it known that we, JOsEPH CASPER Gos- FORD and JOHN PAUL KERN, citizens of the United States, residing at Marquette, in the county of Marquette and State of Michigan,

have invented certain new and useful Improvements in Steam-Engine Governors; and we do hereby declare the following to be a full, clear, and exact description of the inven- IO tion, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to that class of steamengine attachments known as governors77 i 5 'the object of the same being to provide a device of this character which shall be adapted to have absolute and instantaneous control over the valve which supplies the live steam to the .steam-chest and cylinder, and at the 2o same time have the governor perfectly automatic in its action and capable of being adjusted in such a manner that it will at all times admit the exact quantity of steam required, and no more, to maintain the action of the engine at a required or given uniform rate of speed under all the varying circumstances of boiler-pressure or change of burden or load against which Vthe engine is working, thus maintaining and holding the engine at any required rate ot'speed.

Our invention consists in certain novel features of construction and combination of parts, as will be hereinafter more fuliy'described, and pointed out in the claims.

In the drawings which are made part of this specification, Figure 1 shows an upright sectional view of our governor, which, by way of further'designation, we have named the Marquette Governor.77 Fig. 2 is asectional view, 4o more in detail, of certain parts. Fig. 3 is a sectional view or plan of two water-pistons at the point et a, Fig. 1. Fig. 4 isa plan view of the bed-plate, to which are attached the two water-cylinders and the steam-cylinder, show- 4 5 ing also the lever and adjusting tension-screw.

1 1 are two water-cylinders, slightly bellmouth, and having a common bearing with shoulders closely fitting upon a bed-plate, 6, the central portion being turned off and accurately iitted, so as to pass through a` hole in the bed-plate, and having a male thread cut thereon, suited to engage a female thread cut in the inside of the upper end of the steamV cylinder 2, by means of which the two Watercylinders 1 1 and the steam-cylinder 2 are 5 5 firmly and securely fastened to the common bed-plate 6. This central opening through the connection and through the bed-plate is exactly over and on a line with the piston 4.

of the steam-cylinder below, and is suited to 6o the free action of the connection-rod 7, which is attached to the cross-head S, and also connectedby the fork connection-rod 9 to the lever 15 15.

3 3 are two water pistons or plungers, con-.- 6 5 structed of wood and metal, and accuratelyr littedto the cylinders 1 1, both pistons having shoulder meta-l caps at both ends, and each havingacrown-head screw or bolt passing through its center from end to end, to hold the metal 7o caps and the leather self-packing 5 5 in position,the upper end of said screws or bolts passing through a common cross-bar or cross-head,

17, and secured thereto by nuts or burrs, as shown in the drawings. The leather self-pack- `ing on the metal steam-piston iis heldin place by a crown-head screw, while the upper end of said piston forms a cone, and is adapted to engage the connectionrod 7 from above. The connection-rod 7 is attached to the cross-bar So 17, and is also connected by the fork connection-rod 9 at the crosshead and guide 8 and to thelever 15 15, having the V-bearings 10 10.

l 10 10 are V-bearings.

11 is the extension-rod to connect tensionspring to a iixed point below.

12 are two tension-springs,arranged to overcome upward pressure from water on the pistons 3 3 and steam-pressure on metallic piston 4. l 9o 13 is a regulation tension-screw, by means of which the position of the cross-head slide may be changed on the lever, in order to make the tension-springs engage the lever with more or less power, as may be desired.

14 is a combined movable slide on the lever 15 15 and nut through which the .regulating tension-screw 13 operates.

15 15 is a lever connected at the pointvE, which is the fulcrum, with an arm ofthe colroo umn A,adapted to engage the spindle B at the point D to open or close the cut-off or throttle C, the said lever being connected by its long arm to the fork connection-rod 9 and the two f sediment.

22 .represents water supply pipes from pumps connected with engine.

23 is the globe-valve cutoff to regulate water-pressure supply to keep the governor from acting toosensitively.

24 24 are water-supply feed-pipes.

25 isfthe` steam-pipe from boiler, allowing steam 'to act'upon condensed water through'a goosefneclr connection, (not shown on drawings,-)so that'steam will not come in contact `with leather selfpacking.

In oursinventio'n we do not limit ourselves l i of the pistons 3 3, operating in the cylinders strictly to the shown.

It'will be seen by the foregoing combination and construction that whenever the separate forms of construction herein or combined upward pressure from thefw'ater upon the pistons 3 3 andof the'steam upon the'piston 4, acting through the connectionrodl 7 and the forked conuection-rod 9 upon thelong arm of the lever 15 15, is greater than the vpower exerted in a downward direction 35 by the tension-springs 12 12 on the lever, the

lever-will be raised, its short armv engaging the spindle B of the valve at D, thus closing the cut-off or throttle C, and vice versa, whenever the upward pressure upon said valves is less than the power exerted by the'tensionsprings upon said lever, the lever will be dra-wn down, thus opening said cut-off or throttle,

and whenever the pressure upon said pistons is just equal to the downward tension/of the springs the lever will remain in equilibrium, andtheposition of cut-offor throttle C will not be changed. It follows, therefore, that anyincrease or decrease of pressure upon the said pistons, the downward force of the tensionsprings upon the lever -remaining'the same, willzwork a change on the cutoff or throttle, opening or closing it to some extent.

It is needless, perhaps, to add that should the water-pressure upon the pistons 3 3 beincreased and thesteam pressure upon the steam-piston 4 be decreased in the same ratio, the lever 15 15 will not change, and the throttle or ycutoff will remain inthe same position, and vice versa. l

Having thus described our invention, what weclaim as new, and desire to secure by Letters Patent, is-

1. In an engine-governor, the combination of two water-pistons, 3 3, connected to a common cross-bar and cross-head, 17, and operated upon by water-pressure from pumps connected with engine, the connectionl rod 7,

of the water-cylinders 1 1 with the pistons or plungers3 3, with metal shoulder-caps and leather self-packing 5 5, with the crown-head screws or bolts passing through the center of said pistons, with their common cross-bar 17 having a rod-connection downward, 7, between lsaid cylinders, to engage the steam-piston 4 of 8 5 the cylinder 2`with the cross-head 8, with the fork connection-rod 9, with the lever 15 15, to engage,V the spindle B of the cutoff or throttle C, as and for the purposes substantially as described.

' 3. In an engine-governor, the combination 1 `1,with the steam-cylinder 2, with the metal piston 4, having its upper .end cone-shaped f and adapted to engage the spindle or connection-'rod 7 with the cross-head 8, the fork connection-rod 9,with the lever 15 l5, the teny sion-'spring 12 12, the extension-rod 1l, the lower pin-connection for extension-rod 19, its

cross-head connections 14 and 16, with the tension-screw 1 3 and its bearings 18 18, with the combined movable slide 14 upon the lever y 15 15, serving also as upper cross-head to tension-springs, and as a movable nut, through lwhich the'tension-screw operates, the spindle B ofthe cut-off or throttle G,with the column A, as and for the purpose substantially as described.

4. In an engine-governor, the combination of thecylinders 1 1 and 2 with the respect- `ive pistons 3 3 and 4, the water-cylinders 1 1 being secured to the bed-plate 6 above, and connected to and with the steam-cylinder through the bod; plate, in the manner substantially as shown', with the sand-trap 20, the dripiport 2l, with the water-supply ports from the pumps connected with the engine, 22, the

.globe check-valve to regulate the pressure of the water, to prevent the governor from acting too sensitive, 23, with the water-pressure feed 24 24, the pistons 3 3, with theI cross-bar 17 the steam metal piston 4, with the steam-port 25, the piston-rod 7, the cross-head 8, the fork connectiourod 9, with the lever 15 15, with the spindle B of the cut-off or throttle C, as and for the purposes substantially as shown and described.

5. In an engine-governor, the combination of the bell-mouth cylinders 1 1 with thel pistons 3 3, the leather self -packing 5 5, the guide-plate and cross-head 17,' with the con-V nection-rd 7 downward between said cylinders and through the cross-head and guide 8,y

through the bed-plate 6, to engage the metallic piston 4, the steam-cylinder 2, the fork connection-rod 9,with the cross-head 8, and the lever 15 15, with the tension-springs 12 12, with the tensionscrew 13, the bearings 18 18, the spin dle B of the cut-off or throttle C, as and for the purposes substantially as shown.

6. In an engine-governor, the combination of the pressure from the boiler through the steam-port 25 on the metal piston 4 in the cylinder 2, with the connection-rod 7, the cross-head and guide 8, with the pressure of the water upon the pistons 3 3 in the cylinders 1 1, the feed-pipes 24 24, the globe check- Valve 23, the supply-pipes from the pumps,22, the sand-trap 20, the drip-port 21, the cross-` bar 17, with the counection-rod 7, the crosshead and guide 8, the fork connection-rod 9, with the lever 15 15, with the tension-springs l2 12, the tension-screw 13, the spindle B of` the cut-off or throttle C, as and for the purposes substantially as set forth.

7. In an engine-governor, the combination of a single steam-cylinder attached to the unlder side of a bed-plate and secured thereto by a tubular fitting coming down through a hole in the bed-plate from two water-cylinders standing side by side and attached by the same fitting to the bed-plate above, the

steam-cylinder having a metal piston therein adapted to operate by direct boiler-pressure, the head of the piston having a conicalshape bearing adapted to engage the end of a connection-rod attached to a cross-head and guide coming down from above the bed plate through the tubular connection, the crosshead being free to move up and down in the guide between the water-cylinders, and being attached to a lever by means of a fork connection-rod, with two water-cylinders having pistons connected at their tops by a common crossebar and acting in unison, being adapted to receive water -pressure from a common feedpipe from pumps connected with the engine, their common cross-bar being connected by a connectiourod and a fork connection rod to a lever, the steam-piston and the waterpistor.s being adapted to impart upward pressure upon said lever, with two tensionsprings attached to the lever, and adapted to draw down the end of the lever and to overcome the upward pressure of the steam and water, the short arm of said lever being adapted to open or close the cutoff or throttle, as and for the purposes as described.

8. In an engine-governor constructed substantially as shown, the combination of two tension-springs attached to the long arm of a lever by means of a sliding cross-head, their opposite ends being securely fastened to a crosshead and extension-rod to a fixed point below, the sliding cross-head also forming a movable nut, through which passes an endless screw with suitable bearing, and adapted to change the position of the sliding cross-head upon the lever, so as to make the springs engage said lever with more or less power when desired, with two water-cylinders standing side by side upon and being firmly and securely attached to a bedplate, and through a bed-plate to a steam-cylinder below, which is provided With square shoulders, and is also securely fastened to the bed-plate and the cylinders above by means of a thread cut on the inside of the upper extension of the steam cylinder, and adapted to engage the tubular portion of the shoulders of the two Water-cylinders above coming down through a hole in the bed-plate, the water cylinders being provided with wooden pistons or plungers having metal shoulder-caps at both ends and aleather selfpacking adapted to work in said cylinders, both pistons having crown-head screws or bolts running' through their centers from end to end, with suitable nuts, and being connected at their top by a common cross-bar, which allows of being connected to a lever by means of forkV connection-rod,the water-pistons being adapted to impart motion to the lever from the pressure of the water through a supply-port from pumps connected with the engine, the steam-piston being also adapted to impart motion to the lever from the pressure of the steam from the boiler through a steam-port,

IOO

the lever being adapted to open or close a cutoff or throttle, substantially as described.

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

JOSEPH CASPER COSFORD. JOHN PAUL KERN.

Witnesses:

JAMEs M. WILKINSON, A. F. MAYNARD.

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