US326933A

US326933A - Edwaed h

Info

Publication number: US326933A
Authority: US
Publication date: 1885-09-29
Anticipated expiration: 1902-09-29

Description

(No'Moael.)

' E. H. AMET.

LEGTRU'STEAM GOVERNOR.

104326,933. I 'Patented ept. 29, 1885.

Unire,

ELCTR SPECIFECATION forming part 0i' Letters Fatemi; No.

Application filed December i884.

To aZZ whom t may concern,.- I

Be it 'known that I, EDWARD H. Artnr, a citizen of the United States, residing in Chicago, in the county ot' Cook and State of Illinois, have invented a new and useful Improvement in Electric SteanrGovernors, of which the tollowing is a specification.

rlhe object of this invention is to provide a positive and accurate means for automatically adjusting the speed of the driving-motor to the amount of current o r electrical energy required., r i

The present invention consistsin combining with the valve or device which controls the speed and power of the motor a centrifugal governor and a secondarygovernor meclian Aism controlled by amelectro-motive deviceactuated by the current produced,which seo-` ondary governor mechanism has a yielding or spring connection with the valve-stein, so that the centrifugal governor` may, in case'of accidents, control the valve and maintain the normal speed of the engine. The secondary-governor mechanism is also arranged or adjusted to open the valve to onlya certain prescribed extent, after which limit is reached the valve 'is under the sole control of the centrifugal governor. rlhe centrifugal governor operates to regulate the speed of the engine to the work required 'of it within certain limits; but the valve is operated to regulate the speed of the engine, and the dynamo driven -from the same, to

the requirements ol" thev electriccurrent generated by the dynamo, by means of an ordinary electro-magnet connected with the external circuit, the armature-lever of-which'carries on opposite sides of its pivot a pair ot' friction gears, constantly driven in opposite directions, one or the other of which -is brought in i contact with and operates the valve-stem-nioving mechanism, according as the armaturelever is elevated or depressed by a-decrease or increase in the force of the current. When the required current is being generated by the dynamo and the armature-lever occupies'its' normal position, neither ofthe frictions touch the valvesteni operatii'ig-whevl, and the Valve of course remains stationary. Motion is coinmunicatcd from these' two revolving` frictionwhccls to the valve-stein by means ol' an externally-tlireaded non-rotary sleeve,which tits collars loosely on the valve-stem andabuts against or stops above and below it secured rigidly' to the valve-stem, and which threaded sleeve works in a threaded bevel-gear journaledon a stationary bracket, and which is operated by the friction-wheels on the armature-lever. A spring is inserted between the threaded sleeve and the upper stop or collar on the valve stein to prevent any sudden or jumping movement, and by its=-compiession permit the valve-stem to respond to the centrifugal governor. rihe connection between the valve-stein and the centrifugal governor is such that when being depressed by operation of the threaded gear and sleeve the centriiugal governor will not impede the move- YmestaandY thus not oniyi-he centrifugal gov- ;ernor, but the mechanism set 1n motion by the electraniagnet, can independently control the movement or" the valvestem. The latter serves to alter the speed of 'the engine and dynamo to correspond to any-material change in the amount of current required, occasioned, for example, hy the lighting or extinguishment' of some or all of the lamps, or other cause which increases or diminishes the resistance of the external circuit; and the centrifugal governor the cite-ct only when the is set or adjusted to speed ot' the engine increased above that required to produce the cur'. Ht necessary to maintain the Whole number o ii rups, asin t ie case of an accidental breaking oi the circuit, in which the engine would run away77 but for the centrifugal governor. The threaded sleeve is made'of 'a limited length` or its threaded portion is limited so that it will only operate to raise the valve to a certain and limited extent, at'ter which limit is reached the valve is under control of Athe centrifugal governor alone. as the valve-stem slides freely thro` gli the threaded sleeve, and as the cour lition 'ietween the threaded sleeve and the vz.` Vlre-st. m,- is through a compressible spring, the yeintrifugal governor may act whenever called into play, and all that is lrequired to completely disconnect the electrical part of the governor and leave the engine under the sole control o1' the centrifugal governor is to simply re move the belt which communicates motion to the pair ot' i'riction-\vheels on the armaturelever.

rn theaccompanying drawings, which forni a part'ot' this specification, and in which similar lettersl ot' reference indicate like parts, Figure l. is a side elevation ol' my invention. 2 and 3 are vertical sections taken through the valvesteni, the former being enlarged; and Fig. 4 is a plan view looking down from a line taken just alcove the riectrical-governor mechanism.

flu said drawings, A represents the valve of an ordinary steam-engine or other motor; B, the valve-stem, and t) a centrifugal governor, which is or may be ot' any usual or Well-known construction.

C are bevelgears, and a driving-pnl4 ley on the shalt n, through which the centrifugal governor receives its motion from the engine in the usual way. lthese parts are mounted on a standard, Ul, which muy prei'- erably he secured to the head-plate A ot' the valve A.

l) is an electro-magnet connected with the external -circuit terminals D/ D ot' the dynamo-machine, so that the current generated bythe dynamo will pass through the coil of this magnet and energize its core d. The armature lever d is pivoted by a pin,l di, to the bracket C* on which the magnet is mounted. suitablyjournalcd on this armature-lever, on opposite sides ot' its pivot, are a pair ot' dou lolecone friction-wheels, d d, which are constantly driven in opposite directions by apair oi' intermeshing gears, di' d, operated `by a gear, dl, on a shalt, il, through thc gears d" d1 and pulley d, which may preferably receive s motion by a belt, fl, from the driv ing-shaft c oi thc centrifugal governor. The force of the magnet on the armature-lever is counteracted by a spring, dl, the tension ot' which is adjusted by means oi' a screw, d, to just balance the t'orce ol' the magnet and hold the armature-lever in its proper or horizontal position when the normal or required current is being generati-d by the dynamo; but when the amount ol' the current happens to be for any -ausc increased ahove. its normal amount, the magnet will depress the armaturelever, 'thus pulling the l'rirtion-wheel d into contact 4with the groovcd .vinel it); and when the current, on the other hand, falls below its normal amount, the spring d raises the armaturc` lever, thus bringing the other i'riction-u-'hceh d", into contact with thegrooved friction E, thus moving the valve-stem in the opposite direction. rlhe shaft E', to which the grooved friction-wheel E is secured, is journaled in suitable bearings on the standard U, and carries on its opposite end a beveled gear, E2, which meshes with an internallythreaded hollow beveled gear, F, journaled in the bracket F', which is secured to the standard U.

Fitting looscly'on the valve-stem B is an extcriorly-threaded sleeve, b, which works in the threaded gear F, and which is held in position longitudinally on the valve-stem by stops or collars b 112, rigidly secured to the is ot' limited length, so that it vvill operate to raise the valve-stein only to a certain prescribed extent, after which limit is reached the further revolution of the. beveled gear 'F i will of course have no ett'ect upon the valve,

which will then be under the sole cont-rol ot' the centrifugal governor.

'lhc upper end of the valve-stem B rests loosely in the vertically-moving socket-piece B oi' the centrifugal governor, so that when the valve-stein is being depressed 'oy action ol" the threaded sleeve b and revolving nut F, the centrifugal governor will, not impede the movement ol' the valve-stem. friction-wheel d on the arnmture-lever is pressed against the grooved friction-Wheel E by reason ot' an increase in the current generated, it causes thc threaded gear F to lower the sleeve b and valve-stem B, illus diminishing` thesi pply of steam to the engine and lowering its speed and thatof the dynamo driven by it until the current reaches its normal amount, when the spring d restores the ar- When the IOO mature-lever to its original position, and the t'rictiouwvheel E and threaded gear Fol'` course cease revolving. The moment the speed oi" theengine and dynamo are thus adjusted to the new condition ot' the current, it then serves to compensate t'or any minor changes in the work and to maintain the speed ol the engine. and dynamo :it its new or altered rate. ln ease an additional light is turned on in the circuit or for other cause its resistance is increased, the current is ot' course weakened, and the spring d1 will then force up the armature-level", and thus press the other fri:- tion -ivheeh d, against the friction -whccl E, and consequently revolve the threaded gear F in the opposite direction and raise the valvestcni, thus increasing the'spccd ol' the engine and dynamo until the current is restored toits normal amount, when the core (l will pull the armature-lever back to its original position. ln this way l malte use ol the elec .rical part ot' the governor to compensate for any changes in the resistance of the circuit-that is to say, to increase or decrease the current generated to the requirements ot" the circuit, as some or all of the lights are lighted or extinguished, or other changes occur, and at the same time leave the engine under the lull control of' the centrifugal governor, in case 0i' accident, to maintain the engine and dynamo at lthe normal speed.

lhe double-cono friction-wheels on the piv oted lever, in connection with the. V-grooved friction-wheel E, enables me to reverse the movementoforehange thevalve-s'tem byavery slight movement of the pivotcd lever. The apparatus is for this Vreason capable of a very nice adjustment, and will respond quickly and accurately to very slight changes in the current.

l clainif l.v The combination, with a valve-stem, of a centrifugal governor having a loose connection with said valve-stem, so that it may be moved independent thereof, mechanism for operating the valve-stem having a yieldingor spring connection therewith, and an electroinagnet actuated by the current produced for putting said mechanism in operation, substantially as specified.

2. The combination, with thevalve-stem, of a centrifugal governor, and a secondary-governor mechanism put in operation by an electro-motive device actuated by the current produced, said secondary-governor mechanism having a yielding or spring connection with saidvalve stem, substantially as speciiied.

3. Thecomlnnation, with acentrifugal governor, oi' a valve-stem actuated in one direction thereby, but not in the other, a spring for moving the valve-sleuf in the opposite direction, and a secondary governor controlled by an electro-motive devicein the current prod uccd,connectcd with the lvalve-stem through said spring for moving the valve in one direciion, and rigidly with the valve-stein i'or moving itin the opposite direction, subsiantially as specified.

4. The combination, in a motor, ot' its speed or power regulating stein, with a centrifugal governor, and a secondary governor actuated or set in operation by an electro-motive device in the current produced, said secondary governor having a yielding or spring connection with said regulating-stein to move it in one direction, and a fixed connection in the opposite direction, substantially as specified.

5. The combination of' a valve-stem with a centrifugal governor, a non-rotary externall threaded sleeve litting loosely on said stein, stops or collars secured to said valve-stein to limit the movement of" said sleeve thereon, a spring between one of' said stops and said sleeve, an internally threaded hollow gear working on said sleeve journaled in a stal-ionary bearing, a pivoted armaturelever provided withv opposite!y-driven gears en each side otits pivot, and gears or mechanism for communicating the motion of" one or the other 7 Thecombinatiomwith a centrifugal governor, and a reciprocating valve-stem fitting loosely in the movable socket-piece of said governor, of an extcrnall'y-threaded'sleeve fitting loosely on said valve-stem,aspring-connection with said valve-stein above and a fixed connection below said sleeve, and means for imparting motion in opposite directions to said threaded sleeve from an electro-motive device. substantially as specified.

S. The combinatiomwith the valve-stem, of a friction-wheel adapted to revolve in either direction, mechanism for communicating m0- tionirom said friction-wheel to said valvestem, a pivotcd lever provided with a pair of oppositely-rcvolving friction-wheels on opposite sides of its pivot, mechanism for driving said friction-wheels, an electromagnet for tilting said lever in one directi'omand aspring or its equivalent for tilting it in the opposite direction, one of sai-d oppositely -revolving frietionwheels engaging said valve stein opcratingwheel when said lever ls raised, and the other when depressed, but neither engaging the saine when lsaid lever remains in its normal position, substantially as specified.

9. lhe combination, with a centrifugal governor, of' a valve-stem, a sleeve fitting loosely on said valve-steima yielding connection or spring to prevent or limit its longitudinal movement on said stem, and an electro-magnet connected with said sleeve, substantially as specified.

l0. The combination ot" a centrifugal governor with al valve-stein'provided with stops or shoulders b b, spring b, sleeve b, having a limited screw-threaded portionand threaded gear lll, and a secondary-governor mechanism controlled by an electro magnet for operating said threaded sleeve and gear, substantially as specitied. n

ElNVAR-D H. AMET. WitncssL-s:

H. M. .lis mmv, Jeux' W. Munn-lv.