US996752A - Governer for marine steam-engines. - Google Patents

Description

' T. W. FANCY. Q GOVERNOR FOR MARINE STEAM ENGINES. APPLICATION FILLED JAN. 10, 1910.

996,752. Patented July 4, 1911.

COLUMBIA PLANOGRAPH ca, WASHINGTON. D. c.

FFTQ

GOVERNOR FOR MARINE STEAM-ENGINES.

Specification of Letters Patent.

Patented July 4, 1 911.

Application filed January 10, 1910. Serial No. 537,373.

To all whom it may concern.-

Be it known that I, THOMAS W. FANCY, a British subject, residing at Mosers River, in the county of Halifax, in the Province of Nova Scotia and Dominion of Canada, have invented a new and useful Governor for Marine Steam-Engines, of which the following is a specification.

My invention relates to marine engines which are used for the propulsion of steam V vessels and the object of my invention is to prevent the racing of the engine consequent on the propeller becoming uncovered or par tially uncovered by the pitching of the vessel in rough weather. I attain this object by the mechanism illustrated in the accompanying drawing, in which- Figure l, is a side elevation of my invention showing the method of its connection with the steam pipes of the cylinders of a triple expansion marine engine. Fig. 2, is a plan of the same. Fig. 3, is a cross section of the operating steam cylinder. Fig. 4, is an enlarged elevation of the crank disks. Fig. 5, is a front elevation of the slotted crank which operates the rock shaft. Fig. 6, is a plan of the same.

Similar letters refer to similar parts throughout the several views.

In the drawing A, B and C are the three cylinders of a triple expansion marine engine.

D is a small steam operating cylinder which furnishes the power required to operate the mechanism of my invention.

a is a piston steam valve which controls the movements of the piston 0 in the cylinder D. v

b is a slotted double armed crank rigidly secured to the shaft cl which has a reversible rotative motion communicated by the reversible movements of the piston 0 through the piston rod 0 its ointed extension 9 and the slotted crank b, the connection of the extension 9 with the crank 79 being adjustable in order to increase or decrease the rotative motion of the shaft cl.

h is a guide for the piston rod 6.

j, j, are hangers which carry the shaft d.

E is a weight suspended from and rigidly connected with the shaft F.

Gr G are brackets which carry the shaft F.

i is a slotted one armed lever which is also rigidly secured to the shaft F in a horizontal plane.

70 is the slotted fulcrum lever which is suspended from the short arm of the crank b by the suspension rod Z, said rod being horizontally adjustable in the slotted crank Z) by means of the screw 0.

m is a rod connecting the lever 2' and the fulcrum lever is, said rod being horizontally adjustable in both levers and vertically adjustable in length by means of the turnbuckle n.

S is the jointed extension of the stem of the valve a and is connected to the short arm of the fulcrum lever is.

p p are disks carrying adjustable pins 1" and rigidly secured to the shaft (Z.

H is a cut off valve inserted in the steam pipe leading to the high pressure cylinder A.

I is a cut off valve inserted in the exhaust pipe leading from the low pressure cylinder C.

a a are slotted cranks connected to said valves H and I.

w w are connecting rods between the cranks a and the disks 79 said rods being adjustable in the cranks u and on the disks 7).

The operation of my invention is as follows: The weight E and its connecting rod 2 maintain a vertical or approximately vertical posit-ion by the force of gravity and the lever 2' a corresponding horizontal position, and as the stern of the vessel rises with the sea the lever z the connecting rod m, and the fulcrum lever 70 combine to open the piston valve (1. at the bottom admitting steam to the bottom of the cylinder D moving the piston c upward which through its connections with the shaft (Z will cause said shaft with its rigidly connected disks to give a partial revolution which by means of the connecting parts a", a: and a will also cause the out 01f valves H and I to make a partial revolution thus eifectually shutting off the live steam with the exhaust and vacuum and instantly depriving the engine of all power. The disks p are so adjustable as to close the valve H in the live steam pipe slightly in advance of the valve I and open the valve I slightly in advance of the valve H as the reverse movement of the ship reversely operating the mechanism again admits steam into the high pressure cylinder A. The upper end of the fulcrum suspension rod 2' is adjustable in the crank Z) by means of the screw 0 to suit the stroke of the piston c to the varying conditions of draft and weather.

I am aware that marine engine governors have been operated by weights or pendulums and I therefore do not broadly claim such as my invention, but

What I do claim and desire to secure by patent is- I 1. In a marine engine governor, the combination of a horizontal journaled shaft, means adapted to partially rotate said shaft, crank disks adjustable on said shaft, with a cut ofi valve in the main steam pipe of the engine, a cut off valve in the exhaust or vacuum pipe and rods connecting said valves and said crank disks on said horizontal journaled shaft; substantially as described.

2. In a marine engine governor the combination of a cut off valve in the main steam pipe, a cut ofi valve in the exhaust pipe, a

ournaled shaft carrying a rigidly connected double armed slotted crank, crank disks adjustable on said shaft, rods connecting said cut off valves and said adjustable disks, with an operating steam cylinder and rods connecting the long arm of said double armed slotted crank with the piston of said operating steam cylinder; substantially as described and set forth.

3. The combination in a marine steam engine governor of a cut off valve in the main steam pipe, a cut off valve in the exhaust or vacuum pipe, a horizontal journaled shaft, a double armed slotted'crank rigidly connected to said shaft, crank disks adjustable onsaid shaft, rods connecting said out off valves and said crank disks, with an operating steam cylinder, jointed rods connecting the long arm of said double armed slotted crank with the piston of said operating cylinder, a fulcrum lever suspended from the short arm of said double armed slotted crank and adjustable therein, jointed rods connecting the valve of said operating cylinder with the short arm of said fulcrum lever, a weight suspended from and rigidly secured to a horizontal shaft resting in revoluble bearings, a lever arm rigidly secured to said shaft at right angles thereto in a horizontal plane, and a rod, connecting said lever arm to the long arm of said fulcrum lever; substantially as described and for the purpose specified.

I 4. In a governor for a marine steam engine, the combination of a weight suspended from and rigidly secured to a horizontal shaft resting in revoluble bearings, a lever arm rigidly secured to said shaft in a horizontal plane, a fulcrum lever, a'journaled horizontal shaft having a rigidly connected double armed slotted crank, a rod suspending said fulcrum lever from the short arm of said double armed slotted crank, a rod connecting the long arm of said fulcrum lever with the said rigidly secured horizontal lever arm, an operating steam cylinder, a jointed rod connecting the valve of said operating cylinder with the short arm of said fulcrum lever and adapted to control the movements of the piston of said cylinder, with an adjusting screw in the short arm of said double armed slotted crank adapted to regulate the stroke and speed of said piston by moving the upper connection of the suspension rod back and forth across the center of said journaled horizontal shaft; substantially as set forth.

5. In a marine engine governor, in combination, a plurality of cylinders, a pipe having communication with said cylinders,

a cut-off valve at the inlet endof said pipe,

a cut-off valve at the outlet end of said pipe, a power cylinder, a valve casing-having communication with the valve cylinder, a slide valve in the valve casing, a piston operable in the power cylinder, a shaft, a double armed crank secured to said shaft, the piston of the power cylinder having connection with one arm of said crank, an arm secured to said second shaft, a weight secured to the second shaft, a fulcrum lever, a connection between. the second mentioned arm and the fulcrum lever, a connection between one arm of said double armed crank, disks on the first mentioned shaft, and connections between said disks and the aforesaid cut-0ft valve. V

G. In a marine engine governor, in combination, cylinders, a steam pipe having communication with said cylinders, a cut-ofi at the inlet end of said pipe, a cut-off at the outlet end of said pipe, a power cylinder, a shaft, a second shaft, aweight secured to the second shaft, connections between the shafts, connections between the second shaft and the power cylinder to operate the latter, and connections between the first mentioned shaft and both of said cut-offs to operate the cut-offs,one slightly in advance of the other.

7. In a marine engine governor, incombination, a plurality of communicating cylinders, one cylinder havingan inlet provided with a cut-off, another cylinder having an outlet provided with a cut-off, a shaft, disks on the shaft, a second shaft, a weight 'secured to the second shaft, connections between the two shafts, means for operating the first mentioned shaft to rock it, and con nections between the first mentioned shaft and said cut-offs to operate one cut-off slightly in advance of the other.

8. In a marine engine governor, in colnbithe shaft, connections between the disks and natlon, a plurality of cyllnders, a steam pipe said cut-01f Valves, and a counter-balancing comniunlcating with said cylinders, a cut-ofi Weight cooperating wlth said shaft.

valve in the exhaust vacuum end of said THOMAS W. FANCY. 5 pipe, a cut-off in the inlet end of said steam Witnesses:

pipe, a shaft, means constructed and ar- T. WV. JONAH,

ranged to rotate said shaft, disks secured to O. A. MERRY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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