US2082680A - Hydraulic governor - Google Patents

Description

June 1, 1937. c J. BULLICK HYDRAULIC GOVERNOR Filed'S ept. 12, 1935 2 Shets-Sheet 1 C/aranc J Eu/UCK I Attorney June 1, 1937; c. J. BULLICK HYDRAULIC GOVERNOR Filed Sept. 12', 1965 L2 Sheets-Sheet 2 Czarerzce J Bu))[c K W ,Attor gy Patented June 1, 1937 UNITED STATES FA'E'EENT @FMQE Canad Application September In Canada 1 Claim.

This invention relates to improvements in a hydraulic governor, its primary object being to provide speed governing means to be used in conjunction with a valve mechanism to control the speed of the machine or engine with which it is associated.

A further object of the invention is to devise a hydraulic governor which is self-contained having associated therewith a liquid reservoir and means within the device to create pressure on the liquid drawn therefrom, whereby valve operating means are actuated to control the speed of the mechanism to which the governor is connected.

With these and other objects in view that may appear while the description proceeds the inven-- tion consists in the novel construction and arrangement of parts as hereinafter more specifically set forth, claimed and shown in the accompanying drawings forming part of this application and in which:-

Fig. 1 is an elevation of my improved hydraulic governor showing the upper half thereof in section.

Fig. 2 is a partial cross-section showing the propeller blade assembly, taken on line 2-2 of Fig. 1.

Fig. 3 is a detail view of the propeller blade pitch adjustment sleeve.

Fig. 4 is an enlarged sectional detail of the propeller blade pitch adjustment mechanism.

Referring more in detail to the drawings in which similar reference characters designate corresponding parts throughout the several views it will be seen the invention comprises a cylinder I 0 cast on a base H or other suitable supporting structure to accommodate the associated mechanism. Within the said cylinder is a piston l2 mounted on the end of a piston rod l3. The piston is provided with a compression ring I4 and is 40 preferably threadably attached to the piston rod as shown at I 5. The piston rod extends through an orifice IS in the cylinder ID to a guide bracket I! formed on the supporting structure I l. A compression spring I8 is mounted on the said rod and arranged to bear against the said bracket l1 and a pin I9. In the end of the rod I3 is an aperture bored axially therein to receive a connecting rod or other device 2| from the valve gear 50 to be controlled. The same is held in an adjustable position therein by means of a thumb screw 22 threaded into the piston rod I3.

The cylinder head 23 is secured to the cylinder by means of a flange 24 bolted to a corresponding flange 25 by flange bolts 26 and is similarly 12, 1935, Serial N0. 40,324 May 14, 1935 formed on a support or base 27 which corresponds to the support or base H. A central orifice 28 is formed in the cylinder head and a rotating shaft 29 having a slidably mounted sleeve 38 which rotates with the said shaft are both mounted. The said sleeve 38 is connected to the shaft by means of a spline 3i engaging a longitudinal groove 32 in the said shaft. A guide bracket 33 is formed on the support 27 and the end of the shaft 29 is mounted in an adjustable thrust bearing 34 threadably mounted therein.

Within the cylinder and near the inner end of the shaft 29 are a number of propeller blades 35 which are pivotally mounted in sockets 36 in the shaft and extend radially therefrom. The blades are provided with a shank 37 which forms the axis thereof and engages the socket 36 and a collar having teeth out in the periphery thereof to form a pinion gear 38. The sleeve 30 is enlarged as at 39 to enclose the said gears and slotted as shown at 48. A gear rack H is formed within each slot 13 to engage the gears 38 in such a manner that when the sleeve is moved laterally on the shaft the propeller blades are rotated on their axis. This rotation varies the pitch of the blades and thereby increases or decreases the propelling force thereof as the same is rotated at any given speed. In order to assemble the device the cylinder head is split laterally across the center of the bearing and flanges 42 constructed thereon by means of which the head portions are securely bolted together.

The lateral movement of the sleeve 30 is controlled by an adjustment sleeve 53 which is threaded into the cylinder head at 34. The outer edge is milled and a spring brake or stop i6 is secured on the cylinder head casting to engage the same and retain it in any set position. The adjustment sleeve 43 is provided with a plurality of pins 4? which extend inward radially to engage a circumferential groove 48 at the outer end of the sleeve 30. By this construction the sleeve 36 is allowed to rotate with the shaft 29 while the adjustment sleeve remains stationary. A gear or sprocket wheel 49 is keyed on the shaft between the adjustment sleeve and the guide bracket 33 by means of which the device is connected to the mechanism with which it is to be used.

The cylinder is to be filled with oil or other liquid of suitable consistency. A reservoir 5 is provided therefor and is threadably connected into the cylinder head above the same so that it may feed the oil into the cylinder by gravity.

From the foregoing description it will beseen that as the shaft 29 is rotated, by its connection with the source of power, the propeller blades will revolve and create a propelling force upon the liquid in the cylinder toward the piston. The piston will then be moved according to the amount of the force and the valve connecting mechanism actuated in accordance therewith. In order to create the required force for a given speed the pitch of the propeller blades is adjusted as previously described by means of the adjustment sleeve.

It is believed that the construction and advantages of the structure Will be apparent from the foregoing paragraphs taken in conjunction with the accompanying drawings without further detailed description.

While the preferred embodiment of the invention has been disclosed it is understood that minor changes in the construction and arrangement of co-operating parts may be resorted to within the scope of what is claimed without departing from the spirit of the invention.

I claim:

In a hydraulic governor as described comprising a cylinder and a cylinder head secured thereon, a piston mounted to reciprocate in said cylinder having fluid tight connection with the side walls thereof, a piston rod extending from said piston through the end of the cylinder, a guide bracket supporting the outer end of said piston rod, a valve connecting rod attached to the end of said piston rod, a transverse pin mounted through said piston rod between said cylinder and bracket, an expansion spring mounted on said piston rod between said bracket and pin, normally urging said piston towards the cylinder head, a fluid disposed in said cylinder between its head and said piston, a sleeve extending axially through the cylinder head, a driven shaft extending through said sleeve, said sleeve being keyed on said shaft and movable longitudinally thereof, a plurality of propeller blades pivotally mounted in sockets in the inner end of said shaft and extending radially therefrom, pinion gears formed on the shanks of said blades and enclosed in slots formed in the inner end of said sleeve, rack bars formed along one side of said slots in mesh with said gears for rotating said blades when said sleeve is moved, an adjustable sleeve surrounding the outer end of said first mentioned sleeve and threaded in the cylinder head, radial pins extending inwardly from said adjustable sleeve having engagement with a circumferential groove in the outer surface of said first mentioned sleeve whereby the latter sleeve is moved longitudinally of the driven shaft upon turning of the adjustment sleeve, thus rotating the propeller blades to adjust the pitch thereof, thereby controlling the pressure exerted on the fluid by the propeller and likewise the pressure of fluid against said piston.

CLARENCE JOHN BULLICK.

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