US902278A - Governor. - Google Patents

Description

A. D AVIS.

GOVERNOR.

APPLICATION FILED FEB. 8, 1907.

902,278. Patented 0ct.27,1908.

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ex 7 i 36 -a1 m A I 751M WJ I UNITED STATES PATENT OFFICE,

AUGUSTINE DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO DAVIS AOETYLENE COMPANY, OF ELKHART, INDIANA, A CORPORATION OF SOUTH DAKOTA.

Patented Oct. 27', 1908.

GOVERNOR.

No. 902,278. Specification of Letters Patent.

Application filed February 8, 1907. Serial No. 256,431.

To all whom it may concern:

Be it known that I, AUGUSTINE DAvIs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Governors, of which the 1 pressure of the gas in the generation chamber so as to automatically arrest the operation of the motor when the bell reaches a predetermined height or the gas a predetermined pressure, and to automatically release the rfnpltor as the bell descends or the pressure I have found in practice that the sudden release of the motor from an idle or inactive state is apt to produce a renewal of the feed of the carbid in excess of what is needed or desirable; and this results in comparatively large variations and fluctuations in the gas pressure. The object of my invention, therefore, is to provide a governing devicefor the motors of acetylene generators and similar devices wherein the actionof the governor shall be such as to gradually release the motor as the bell descends or the gas pressure falls from a predetermined height or point, thus feeding to the generation chamber only the amounts of carbid required to produce the normal amount and pressure of gas desired, and in comparatively even and uni form quantities. The device is especially useful and applicable in connection with generators using a non-expansible generation chamber, such as is herein shown to illustrate an ap lication of the invention.

In t e accompanying drawings,-Figure 1 is a side elevation, partly in vertical section, of a carbid feed mechanism set in the upper end of the generator with my improved governor applied thereto; and Fig. 2 is a side elevational view of the governor device.

First briefly describing such parts of an acetylene generator and carbid feed mechanism as are herein shown for the purpose of illustrating one application of my invention, designates the upper portion or neck of the generator having an annularly grooved ring 11 at its upper end, in which is set a carbid hopper 12 provided at its upper end with a cover 13 having on its under side a circular rib 14 fitting in the groove of the ring 11, a suitable gasket between the parts being provided. The cover 13 has a central opening or mouth adapted to be closed by a cap 15 maintained in position in a manner to also hold the cover 13 in place by means of a yoke 16 having fingers 17 engaging the under surface of ring 11, and having a screw 18 passing through the center of the yoke and pressing against the top of cap 15. The lower end of the hopper 12 has a carbid-feeding mouth beneath which is located a carbid feed wheel 19 mounted on a shaft 20 suspended by brackets 21 from the hopper 12. 22 designates a weighted door or valve pivoted to the wall of the feed opening and extending to the surface of the feed wheel 19, and automatically operating to regulate the amount of carbid fed by the wheel 19.

Referring now more particularly to those parts wherein my present invention is embodied, 23 is a conventional designation of any ordinary spring-actuated clockwork motor, of a type such as is shown, for examplefin Letters Patent to Augustine Davis, No. 719,091, granted January 27, 1903, the main shaft 2 1 of which is connected by a flexible coupling 25 with the feed wheel shaft 20. 26 may designate the fly-shaft of the motor that is connected with the main shaft 24 by means of an ordinary clockwork speed train, such as is shown and described in the Letters Patent aforesaid, which flyshaft, of course, rotates at a high speed relatively to the speed of the main shaft 24 when the motor is in operation. Fast on the flyshaft 26 is a brake-wheel in the form of a cup-shaped disk 27, in which are pivoted at diametrically opposite points 28 and 29 a pair of curved weights 30 and 31, preferably of such shape as to conform on their outer faces to the curved inner wall of the rim of the disk 27. These weightshave formed on their outer sideslugs 32 and 33 adapted to play back and forth in apertures 34 and 35 formed through the circular rim of the disk 27.

Tapping the wall 10 of the generation chamber above the motor 24 is an elbow pipe 36, the vertical member of which is supported in a suitable bracket 37 secured to the wall of the chamber, such pipe 36 communicating at its upper end with a diaphragm chamber 38 containing a diaphragm 39, which latter is connected by a link 40 with a lever 41 in turn pivoted to a lug 42 mounted on the diaphragm chamber. The other end of the lever 41 is connected as by a link 43 with the upper end of a brakeband 44, which latter underlies the brake-wheel 27 and is connected at its other end to a suitable pin 45 projecting from the casing of the motor 23.

In the operation of the device, so long as the motor is feeding the carbid in proper quantities to the underlying generation chamber and the pressure is below the predetermined limit, the diaphragm 39 is not raised sufficiently to apply the brake-band 44 to the brake-wheel 27, and the latter is therefore idle so far as its controlling effect on the motor is concerned. When, however, the pressure suddenly rises to or above the maximum limit intended, the lever 41, actuated by the diaphragm 39, raises the brakeband 44 and applies it to the brake-wheel 27,

thus arresting the operation of the motor and consequently stopping the further feed of the carbid. Thereupon the gas pressure falls, and as the pressure of the brake-band 44 on the brake-wheel is released, the motor would normally start up again at full speed, which wouldresult in an undesirable and sudden increase in the amount of carbid to be fed to the generator. This undesirable operation is prevented in the device shown by reason of the fact that as soon as the motor begins to speed up owing to the release of the brake, the weights 30 and 31 are urged outwardly by centrifugal action, thus throwing the lugs 32 and 33 into frictional engagement with the brake-band and automatically arresting and checking the high speed of the motor. This auxiliary braking mechanism, however, permits the motor to operate the carbid feed to a suflicient extent to restore the normal working of the apparatus and the normal generation of gas. It will thus be seen that the device of my invention prevents the creation of sudden excessive gas pressures thereby.

Although I have shown and described the device of my invention as applied to the motor of an acetylene generator, yet it will be understood that it is not limited to this particular art, but may be used to advantage in any situation wherein the described control 0f the motor and the part or parts driven thereby is desired.

I claim:

1. In a governor, the combination with abrake-disk and a brake-band therefor, of a centrifu ally-actuated weight mounted on said bra iG-(llSk having a part adapted to be projected beyond the periphery of said brake-disk under abnormal speed into engagement with said brake-band, substantially as described.

2. In a governor, the combination with a cup-shaped brake-disk having an apertured rim, and a brake-band therefor, of a centrifugally-actuated weight pivotally mountedin said brake-disk and provided with a lug adapted to be projected under centrifugal action through said aperture of the brakedisk and into frictional engagement with said brake-band, substantially as described.

3. In a governor, the combination with a cup-shaped brake-disk having in the rim thereof at diametrically opposite points a pair of apertures, and a brake-band therefor, of a pair of centrifugally-actuated weights pivotally mounted in--said brake-disk, said weights being provided on their outer sides with lugs adapted to be projected under centrifugal action through said apertures of the brake-disk and into frictional engagement with said brake-band, substantially as described.

AUGUSTINE DAVIS. Witnesses SAMUEL N. POND, FREDERICK C. GooDwIN.

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