US825530A - Device for synchronizing prime motors. - Google Patents

Description

No. 825,530. PATBNTED JULY 10, 1906.

F. ELLIDUTT.

DEVICE FOR SYNOHROfiIZIfiG PRIME MOTORS.

APPLICATION FILED NOV. 29. 1902. B$IBWBD D30. 23, 1905.

2 BHBETB-SHEET 1 meme/ A No. 825,530. PATENTBD JULY 10, 1906.

F. ELLIGOTT. DEVICE FOR SYNGHRONIZING PRIME MOTORS.

APPLIUATIOK FILED HOV. 29, 1992. EBRBWED D50. 23, 1905.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

DEVICE FOR SYNGHRONlZlNG PRlME MOTORS.

Specification of Letters Patent.

Patented July 16, 1906.

Application filed November 29, 1902. Renewed December 23 N05. Serial Nb. 293,113.

To all whom it may concern.-

Be it known that I, FRANGIs ELIJCOTT, a citizen of the United States of America, and a resident of Baltimore, State of Maryland, have invented certain new and useful Im Provements in Devices for Synchronizing rirne Motors, of" which the following is a specification.

My invention relates to a device for syn chronizing the movement of the gates of two woterwheels. It may he applied to other forms of prime motor; but it has been applied by me to water-wheels.

It has been found in practice that when two or more wheels are running together supplying power jointly for the generation of electricity the fluctuations of load will be taken up by one of the wheels more readily than by the other, due to the difference of the frictional resistance of the two wheels, with the result that one wheel will be doing, say, seventy-five per cent. of the work and the other wheel twenty-five per cent. of the work. This unequal distribution of the load upon wheels which are running together is a verv undesirahle condition and one which leads to an unequal wear of the apparatus and an undesirable condition in the generation of power.

' In the intents which were granted to Inc on pendent driving-shafts Decem or 25, 1900, Nos. 664,393, 664,392, and 664,394 I have described storm of automatic governor which I have used successfully for the government of a single water wheel. This governor is capable to a great extent of governing two or more independent wheels running on the same load; but it is not capable of insuring constant synchronisin in the movement of the gates of the two wheels without some additional means to accomplish this result. I have devised an additional means, which is described in this applicetieni Figure 1 represents a pair of governing mechanisms similar to that shown in Patents Nos. 664,392 and 664,394, above referred to, and which are each capable of governing its own wheel. They are shown in connection with two independent flumes and two inde- The governors in the case shown are independent of the drivingishafts, but are belted to them, so as to fol ow their motion. Fig. 2 is a plan view of the same. Referring to Fig. 1, 1 and 2 are'two identical finrnes in which are located two water- Wheels, 3 and 4 are two runner-shafts protruding from the center of the Homes and connected within the [fumes to the runners of the wheels. 5 and 6 are two ,g'ovcrnor cylinders suitably mounted upon a suitable base. {Not shown in this figure.) and S are brackets mounted on the tops of the cylinders 5 ond'fi and in the upper ends of which are journalod the shafts l) and 3G,, by which the gates of the wheels are moved. l1 and 12 ere the piston-rods, which protrude from the tops ofthe cylinders 5 and 6 and to which are connected rocks 13 end 14, which mesh with gear-wheels 15 and 16 (shown in Fig. 2) of the shafts i) and 10 and by which these shafts are turned. 37 and 18 are valvecylinders located upon the sides of the cylinders 5 and 6 and connected at each end with the fiunies 1 and 2 by means of the pipes 19 and 20. Through the pipes 19 and 20 waterpressure is supplied to the valve- cylinders 17 and 18 and the cylinders 5 and 6. 21 and 22 are exhausts from the valve- cylinders 17 and 18, controlled by exhaust- valves 23 and 24. 25 and 26 are the valve-rods by which the valves contained in the valve-cylinders I? and 18 are moved. 2? and 28 are centrifugsl governors identical in construction to those shown and described in l iettors Patent No. 664,392, dated December 25, 1900. 29 and 30 are pulleys on the main driving-shafts of the wheels, and to them the centrifugal gov ernors are belted by means of the bolts 31 and 32 and the pulleys 33 and 34. 35 and 36 are beveled gears on the shafts 9 and 10, respectively, and 37 and 38 are beveled gears meshing with the beveled gears 35 and 36 and secured to the opposite ends of a. shaft 39. The shaft 39 is journaled in brackets 40 and 41 and is provided with couplings 42 and 43, which are capable of being thrown into or out of engagement so as to connect or disconnect the two governors. 44 is a ratcheteird-pswl lever by means of which the shaft 39 may be turned and the gates of the two wheels moved simultaneously while the rest of the apparatus is stationary, if desired.

The operation of the device is as follows: When the wheels are in operation and a fluctuation of load occurs either increasing or decreasing the speed, the runner-shafts will corresfondingl move the governors, and they wil move t e valves contained in the cylinders 17 and 18 admitting pressure to the c linders 5 and 6, by which the pistons in t 9 said 0 linders and the racks 13 and 14 will be move the shafts 9 and 10 rotated, and the gates of the wheels opened or closed. If there 1 were no rigid connection between the two mechanisms, the one which moved more easily would move farthest until a sullicient amount of )ower was committed to the wheels to tallie up the additional load or a sufficient quantity was cut oil to correspond to the reduction of load, and the gates might he at quite different positions, although the speed of one runner was maintained the same as the speed of the other runner, each controlled byits own governor. In the mechanism shonn, however, in this wase the connecting-shaft 39 compels a uniform motion of the shafts 9 and 10, and as one or the other moves the other must move simultaneously and uniformly. It will thus be seen that where two wheels are running together upon the same i load they can he made by this simple mechanical connection to equally divide the 1021161 between them and to run in complete synchronism with one another, the gates of each wheel being always open to exactly tl"e same extent.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a water-wheel governor the combina, tion of a series of water-wheels each provided with a. device. for admitting water to or cutting water off from the Wheels, means for actuating all of said devices uniformly and simultaneously, and an automatic speed-governor connected to and controlling said devices so as to admit power to or cut power off from all of said wheels simultaneously.

Signed by me at Washington, District of Columbia, this 25th day of November, 1992.

FRANCIS ELLICOTT. \Vitn esses:

A. B. rimmers, WM. J. JACOBI.

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