US1099614A - Regulator. - Google Patents

Description

J. F. M. PATITZ.

REGULATOR. APPLIOATION FILED FEB. 10, 1912. RENEWED NOV. 20, 1913.

Patented June 9, 1914.

2 SHEETS-SHEET 1.

ATTEIR-NEY.

J. F. M. PATITZ.

Patented June 9, 1914,

2 SHEBT8-SHEET 2.

INVEN'TDR ATTEI NEY- coLulllA PLANOGIAIH LO-,WAININIITUN, D. c

UNITED STATES PATENT OFFICE.

JOHANN F. M. PATITZ, OF MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ALLIS -CHALMERS MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

REGULATOR.

Specification of Letters Patent.

Patented June 9, 1914.

Application filed February 10, 1912, Serial No. 676,873. Renewed November 20, 1913. Serial No. 802,155.

To all whom it may concern Be it known that I, J OHANN F. M. Pnrrrz, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Regulators, of which the following is a specification.

This invention relates to improvements in the construction of speed regulators for prime movers particularly adapted for regulating the speed of steam turbines, gas on gines, steam engines, or similar devices.

The object of the invention is to provide a regulator which is simple in. construction, efficient in operation, and in which the rapidly moving parts of the device are protected by an inclosing casing.

Another object of the invention is to provide a regulator in which the overall. height is reduced to a minimum. The primary features disclosed herein are claimed in application S. N. 493,648, filed May 3, 1909.

A clear conception of one embodiment of the invention can be had by referring to the drawing accompanying and forming part of this specification, in which like reference characters designate the same or similar parts in the different views.

Figure 1 is a central vertlcal section through a speed regulator. Fig. 2 is a transverse vertical section through a speed regulator, the section being taken along the line IIII of Fig. 1, looking in the direction of the arrows. I

The stationary inclosing casing of the regulator consists essentially of a circular conical cap 1 which rests firmly upon the top of a regulator base 16, the cap being removably secured to the base by means of cap screws. The thrust bearing 21 is mounted centrally within and at the lower portion of the base 16. The base 16 is adapted to be fixed to a stationary portion of the engine frame by any suitable means not shown, and supports the bonnet 36 at one side thereof. The driving shaft 53 of the regulator is mounted within the bonnet 36 and carries a bevel gear 35 at one of its ends. This driving shaft 53 is adapted to receive rotary motion from the main shaft of the engine in the usual manner, not shown.

The main regulator shaft 17 is mounted vertically within the cap '1 and base 16 and is supported at its lower end by the thrust bearing 21. The shaft 17 is vertically adjustable in the thrust bearing 21 by means of a set screw 22, or other suitable device. The bevel gear 18 is secured to the main regulator shaft 17 by means of a key or other fastening means, and meshes with the regulator driving gear 35.

The upper end of the main regulator driving shaft 18 is provided with an enlarged portion 6 which finds bearing in the upper central portion of the cap 1. Side arms 10 project outwardly from the enlarged shaft portion 6 to form a recess and have their lower ends connected with the bracket 15 which is secured to the shaft 17 just above the bevel gear 18. The bracket 2 is fixed to the upper end of the cap 1 and forms a hearing for the regulating shaft 5. The shaft 5 has a bell crank 3 secured thereto, the outer end of which is pivotally connected to the upper end of the regulating rod 1. The rod 1- has a collar 30 secured to the lower end thereof by a transverse pin 16. This collar 30 extends within and loosely fits a recess formed in the crosshead 8 and the upper, end' of the recess is closed by plug 45 encircling rod 4 and extending intothe recess only sufiiciently to leave the collar 30 loose within crosshead8 to permit the crosshead to rotate relatively to the collar 30 but to prevent relativc longitudinal. motion.

The crosshead 8 is slidably mounted within the enlarged portion 6 of the regulator shaft and has outwardly projecting arms which extend beyond the periphery of the shaft portion 6. The connection between the regulating rod 1 and the crosshead 8 is such that the crosshead can rotate relative to the rod 1 the piston sliding between bearing plates 41-7, 48, in the crosshead recess, but cannot move vertically without imparting a reciprocatory or longitudinal motion to the rod l.

The regulator weights 12 are formed as hollow cylinders which, in the position shown, see Fig. 1, coact along their end planes at the center of the regulator. The regulator spring 11 is supported centrally within the weights 12 by means of adjustable brackets 31 carried by adjusting bolts 26 which are supported from the weights by means of spanning portions 32. The bolts 26 are rotatable within the spanning portions 32 but are prevented from moving laterally of these spanning portions by means of transverse pins which coact in T? circular recesses formed near the ends of the bolts 26. The spring 11 is a tension spring and normally tends to hold the weights 12 in contact along their plane end surfaces. The weights '12 are supported from the bracket 15 by means of parallel arms 33, let, which are pivotally mounted to swing upon the bracket 15. The larger supporting arms 33 are mounted upon pivots 2i and have connecting portions 19 which extend from side to side of the bracket 15 below the weights 12. Downwardly projecting arms or levers 20 are formed in one with the arms 33 and prevent the outward travel of the weights 12 beyond a desired limit by coming in contact with stop surfaces 25 formed on the main shaft or bracket 15.

The outwardly projecting portions of the crosshead S are connected by means of links 9 to the ends of bell cranks 42 which are formed in one with the levers 33. The weights 12 have cut-away portions which permit positioning of the links 9 as near to the center of the regulator as possible. Each of the links 9, on either side of the regulator, is so connected as to cooperate with one of the weights 12 only, so that outward motion of either of the weights 12 will be effective in raising the crosshead 8.

During the operation of the regulator, a rapid rotary motion is transmitted from the shaft 53 to the shaft 17 through the bevel gears 35, 18. Due to the action of centrifu gal force tending to force the weights 12 away from their center of rotation, these weights move radially, outwardly in opposition to the inward pressure of the spring 11. The outward motion of the weights 12 causes the levers 33 to swing outwardly about their pivots 24, forcing the links 9 and crosshead 8 in an upward direction. Since the regulator connection 4L is not adapted to rotate with the regulator, but is adapted to reciprocate with the crosshead 8, the up ward motion of the crosshead 8 is trans mitted through the connection 41 to the bell crank 3. The upward motion of the outer end of the bell crank 3 is transmitted to the regulating shaft 5 as oscillatory motion. The regulating shaft 5 is connected with the speed controlling means of the prime mover in the usual manner, not shown.

It will be noted that by inclosing the rotating parts of the regulator within a casing, the possibility of damaging the rotating parts is eliminated, while the undesirable feature of having the oil from the rotating regulator parts sprayed over the en gine frame is also eliminated. By locating the weights 12 and suspension means for same directly adjacent the driving gears, the overall height of the regulator is reduced to a minimum. By providing bearin 's for the regulator shaft above and be low the rotating weights, a more stable mechanism is secured. Since the arms 33, 1 1, are disposed parallel to each other, it will be noted that the opposed weights 12 will at all times be maintained parallel to each other. The mounting of the adjustable brackets 31 on the bolts 26, also provides a simple and eflicient means for adjusting the tension in the spring 11, such adjustment being accomplished by either rotating the brackets 31 bodily, and thus reducing the effective number of coils in the spring 11, or by shifting the brackets along the axes of the bolts 26 to vary the tension of the spring 11. The formation of the downwardly projecting portions 20 on the levers 33, also provides an efficient means for preventing overtravel of the weights 12 beyond a desired limit, thereby preventing possible damaging of the regulator casing in case the regulator should be driven at abnormal speeds.

It should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In a regulator, a stationary frame forming a casing, a recessed shaft having hearings in said frame, weights carried by said shaft intermediate said bearings, a single spring within the recess of said shaft and connecting said weights, and means for communicating the radial motion of said weights to the mechanism controlled by the regulator.

2. In a regulator, a frame forming a casing, a recessed shaft having hearings in said frame, weights carried by said shaft intermediate said bearings, a single spring intersecting the axis of said shaft for counteracting the centrifugal force of said weights, said weights and spring lying within the recess of said shaft, bell crank levers on said shaft each connected at one end to one of said weights, connecting rods connected to the other ends of said levers and extending past said spring, and means connected to the remaining ends of said connecting rods for communicating the radial motion of said weights to the mechanism controlled by the regulator.

3. In a regulator, a frame, a shaft journaled in said frame, a weight adapted to move away from said shaft, a lever pivoted intermediate its ends to said shaft and at one end to said weight, a stop on the shaft for the other end of said lever adapted to limit the outward motion of said weight, and means for communicating the motion of said weight to the mechanism controlled by the regulator.

4C. In a regulator, a frame, a shaft joured to limit the outward motion of saidweight, and means for communicating the motion of said weight to the mechanism controlled by the regulator.

5. In a regulator, a shaft, a weight carried by said shaft, a spring restraining the outward motion of said weight, a recessed crosshead reciprocable on said shaft, linkage connecting said weight and crosshead, a stern extending within the recess of said crosshead and adapted to reciprocate therewith, and means retaining said stem within said recess and permitting relative rotation between said crosshead and said stem.

6. In a regulator, a vertical shaft, a weight carried by said shaft, a spring restraining the outward motion of said weight, a erosshead reciprocable on said shaft and having a recess in its upper end, linkage connecting said weight and crosshead, a stem extending within the recess of said crosshead and adapted to reciprocate therewith,

and means for permitting relative rotation between said crosshead and said stem.

7 In a governor, a single spring, weights attached to said spring, means for supporting said weights independent of other parts, a yoke extending around said spring and spaced therefrom and supporting said supporting means, a slidable cross-head mounted in said yoke, a connection from said supporting means to said cross-head, anon-rotatable piston and rod in said cross-head, and means for rotating said yoke.

8. In a governor, a single spring, weights attached to said spring, a rotatable yoke, supporting means for said weights carried by said yoke, a crosshead slidable in said yoke on one side of said spring, means for rotating said yoke on the opposite side of said spring, means for communicating the extension of said spring to said cross-head, and a non-rotatable means extending from said cross-head.

In testimony whereof, the signature of the inventor is afiiXed hereto in the presence of two witnesses.

JOHANN F. M. PATITZ.

\Vitnesses:

CHAS. L. BYRON, W. H. LIEBER.

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

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