US1038342A - Adjustable automatic rheostat. - Google Patents

Description

C. H. LIAYLURD. I ADJUSTABLE IUTOMATIC RHEOSTAT.

---w .N -mil f6@ ITI 45 1 ally employed to generate the current in the sTaTEs PATENT OFFICE.

CHARLES It.' GarLoiw,

or CHICAGO, ILLINOIS.

ADJUSTABLE airroMATIc ieHEosTa'T;

il ,OSS-,342.

- Speoitlcat'ion of Letters Patent.. Patented Sept. 10, 1912. Appiication nica september e, icio. serial No. 580.562,

i To all whom Ait may concern I matic Rheostats, -of which t Be it known that I, CHARLES'H. GAYLORD, a citizen of the United States, and a resident of Chicago, inthe county of Cook and State of Illinois, have-invented certain newy 4'and useful Improvements in Adj stable Autollie following, ywhen taken in connection with the drawing v accompanying and` forming apart hereof, is

a full and complete description, suilicient'to' enable those skilled in the art to which'it A 'further object of the invention is to obtain a device of the kind named which will be simple' in construction, easy to operate,

. anisms included within the termsof thel not liable to get out of order, and economi'- `call`y made. l

Further objects are setforth in the mechclaims hereinafter recited.

v.top plan view of o Y bodying thisinvention; and Fig. 2 is a side In`the drawing :referred to Figure 1 is a ne side of the device 'emelevation ,ofv saiddevice, with an elect-ric generatoranda plating bath diagrammati- .cally shown; andv Fig. 3 is'an end elevation .f of thedevice; Fig. 4 a section, -on an enlarged scale ,'of a portion of the' resistance coil and a nortion of lits surrounding cylinder, forminglementsrof the device. Fig. 5

end of one of the'standards l,of the device, .10

is an elevatiomon an enlarged scale, of one with adjacent parts, and Fig'. 6 isa diagrammatic View. of the electric circuit of the device.

Similar letters refer to similar parts l throughout the several views.

A is an electric generator of the kind usu plating bath of an ordinary electroplating outfit, and B is said bath.

C is the base on whi h the several elements ci the device embodying the invention are mounted. I have made base C of slate.

D, D', are standards attached to base C. Standards D,^D, are electrically insulated from each other.

E, E', are arms which. are respectively provided with hubs e, e', and said hubsa're rotatably mounted in standards D, D; each .of said arms vbeing in elect-ric connection with the standard in Which-it rotates. Arm D forms an electric terminal as will be 'hereinafter shown.

E (Fig. v5), are rings of insulating material which are respectively forced into .axial apertures in the hubs e 'andF is a 'cylinder providedwith heads f at its ends, each of said heads havingv a hub f which Thearms E, E', together with the cylinder F are t-hus rotatably mounted inthe standardsD Whilejoine'a together so asto retain 'at all times the ysame .relative position. Cylinder F is provided withspiral groove Fy extending around it and from one end thereyot to the other. l Gr is a covering of non-conducting material applied to the periphery of cylinder covering G of granite 'ware as it is termed. H is an electric conducting Wire laid in yspiral groove F and electrically connected 'arms E, E, at its ends. The hub e of arm E is provided with hand Wheel e which is gether with cylinder Fand arm E may be This rotation is .to determine the amperes delivered by theV generator through cutting out or putting iii-portions of the resistance coil or rheostat -tormed bythe wire H.

" I- is ra brush of electric conducting maable'on the4 rod J from one end thereof to .base C. n

L is an electric conducting wire connected at one end to the 'generator A, and at Vthe other end to a terminal of switch L.

L is a wire from the remaining terminal of switch L to terminal K, and Z is an electric conducting-Wire connected at one end to the terminal K and at` the other end to the brush I. The wire H is electrically iconnected at one end thereof to the terminal c, through arm E and standard D.

ed at one end to the terminal .1c and atthe other end to one o f the electrodes of bath B,

fitsinto 'the ring E of insulating material.l

Ihave made cylinder E of cast iron and rigidly attached thereto so lthat said' arm t0-- the other;y K, lc, are electric terminals ont-o.'standard's D, D', bv attaching it to the Vrotated by the turning'of said hand Wheel.

terial, mounted on rod J. Rod J isinounti `ed* in standards D`, D. BrushI is in electric contact With thewire H, 'and is mov- M is an electric conducting wire connect.-

d is e 'Wire connected at one end to theother electrode of hath lg anclat the other end to the generator A. v

N is an electro-magnet coilfn is ythe' armature of coil' N. The coil ,N and lite armature f1/.forms a. solenoid.' The arn1ature n vwhen Withdrawn from the coil N electrically 4connects theterrninal-e E, l' of '4s-Witch L', and when said armature n, is

drawn into theeoil N, (upon an electric currentlowing through said coil) it is thereby disconnected' from-one ot saidterminals to open the switcha When no current is passing through the coil l@ the switch L" may he closed., but when a current isv specti flowing .tllough said coil, the arrnature 'n is drawn from electrical"Contact -with teru andhourhand @V v Y N, and at the other end.

4niinal L, therehjf opening Said switchgi and Vsaid 'switch is held open so long es said coil ace or" i l f u to a corresponding. terminal' if" on the T is a wire attached at oneend'to generw tor A and at the other end tothe coil N, and t is a Wire attached at Vone' end to the coil to hand of face of clock f.

and Wire 'mi tothe generatori A,

T' isv a Wire attached et one. end to liantl Q" and at theother end, generator A.- `lllhen the hand CW and the hand Q," are both in electric Contact 'with the -terniinele which are Connected by a given Wire E, an electric circuit' is established from lthe generator A' over Wire T to and through the -ooil N, thence over 'Wire to hand oversaid hand to the terminal with which saidV hand is in electrical Contact, from said. terminal over Wire R toa Correspending` .terf ininal P', frein said terminal ,over hand Q" to Wire T' and over said wire T'haclr to the generator A.. .The flowing of an electric current over the vlast above described circuit energizes the coil N and its armature u is 'drawn thereinto, thus withdrawing it from terminal Z' of switch L'. The switch l] 'is in the cirouit'Whie-h comprises generator A, WireL, switch li', Wire li", terminal l,

` Wire Z" brush l resistance coil ll arm E'. 7 7 5 standard D", 'terminal 7s, Wire M, hath B,

, along on retienen -f I Ey turning the hand Whee der F is turned, and' the .hrnfs isf moved in Contact with thedange 'separating the the eylinf rod J throughaitl rush com several. turns oi? lthe spiral groove ll. The

brush l nay, also, be moved hy hand along .its roel i to he brought into Contact With the H at any desired point; B31 making the cylinder F lrot-ataloleand the hrnsh l non-rotatable, anydesired length or' the ref' L'ai-stance coil ll inay be cut out oi' the circuit,

and any desired number of 'almperes of cur rent utilized in the vplating hath B.

l danni-f l. rebase, standards on the-hasef`armsre-` vvided 'With hulls, "and Said f mounted inv thestandards, a provided.' with o; peripheral 'spiralgroove, a spiraliy wound resistance eoil mounted in said groot/e to 'turn with said arms, a non-rotatably mounted brush in electric contact, `with one turnofthe Wire or" said coil, and in ineehanical'fcoutact with said spiral groove, termnalS'onsaid hase,

rely n,

and electric conductors froinone of said terrninals toene endof'eaid coil and ntrom the other ot said 'terminals tothe brush, all arranged so that .the turning oit 'said -arnis,`

cylinders and Spirally visuiund resistance coil constitute a rotatable adjust-nient which' varies the length of said Wirehetween seid brush und the terminal connected to the end ,of the wiren i A hase, standards onthe hase, arms re spediively7 provided Withhubs and said hulos rotatably rncaintc'edl in the standards, and' one; of said arms 1n electrical conducting con-- tact with 'one or said standards, a cylinder, rotatably -niorunx-J-cl in said standards, a. han@ Wheel attached toonel oli Selci ends, said cylinder provided Wit-ha 'peripher l spiral' groove, acoveiing'of electrical non-eonductinginaterial to said cylinder, a resistance coil consisting or' a spirally'wound Wire in the groove onsaidcylinder, one end of said lwire attached to the arrnwhich iS- in velectricalcontact withv the standard, a rod mounted to lhe parallel to the axis of the cylinder, a brush morably mounted on said'v rod., and said brush in contact'with'one turn of the Wire of said coil and with saidspiral groove, terminals 'on the base, 'a Wire'connecting one of Saidterminals with the one of said standards Which Ais in'electrical contact with one ot said arms, and a Wirecon- Nil necting the remaining terminal with Said-v

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