US876326A - Automatic electrical release starter. - Google Patents

Description

.PATENT-BD JAN.14. 1903. A. J. BURNS. AUTOMATIC ELECTRICAL RELEASE STARTER.l

APPLICATION FILED MAR.151907.

5 noe/nidi @19H11 @aan akami? Novze. FATENTED JAN. 14. 1908. A. J, BURNS.

AUTOMATIC BLEGRICAL RELEASE STARTER.

APPLICATION FILED MAR.15,1907.

` 4 SHEETS-SHEET 2.

v I' l l www PATENTED JAN. I4, 1908.

A. J. BURNS. .AUTOMATIC ELECTRICAL RELEASE STARTER.

APPLICATION FILED MAR. 15. 1907.

4 SHEETS-SHEET l.

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ATBNTBD JAN. 14. 1908.

A. J. BURNS.

AUTOMATIC ELECTRICAL RELEASE STARTER.

APPLICATION FILED MAR.15. 1907.

4 SHEETS-SHEET 1L.

ations,

ANTHONY. BUR-NS, OF OSWEGO, NEW YRK.

AUTOIMATIC ELECTRICAL RELEASE-STARTER.

specification of Letters Patent.

Patented Jan, 14 1908.

pplication tiled Merch l5, 1907. Sariil No. 362.514,

To all whom it mcy concern:

Be it known that l', ANTHONY J. Ecrins, e citizen of the United States, residing'ttt (lewego, in the county of Oswego und Stute ot New York, have invented ed new and useful Automatic Electrical lrelcsseter-ter; and l do hereby declare the following to be e full, clear, sind exact description of the invention, 'such es will enable others skilled in the ort to which it oppcrtsins to ineke and use the sinne.

This invention pertains to un automatic release starter, adapted for use in connes tion with alternating current motors, 'for the purpose of storting the seme.

ln connection with :in apparatus of the shove type, and shown in the drawii'igs, the invention sinus es an essentiel and primary object to provide device oit this character, whereby, in cose ol failure4 oi current supply, the outon'nrtic switch oi the device will be brought into operation, therebyr shutting' down the motors. lhis device will automatically, es will be understood, open the circuits, thereby olivier/ing the necessitj)T ol the operutor being; in rendiness to do so bv hund, that in cese oi i'ailure ol current supply, ss above stated.

When the motor circuit 1s open the motor l is desd end will remain so until the operator closes it signin, thus leaving so thut the operator et the station may reestablish the current supply without den ger to the machines on the circuit. lihis device snves considerable time, 'which under the previous syste-ni oi hand control sppsril-tus wus wasted. ,it has been iouud, es will be understood, that ull motor circuits should be open before sending; current over the lines.

This invention comprises further obiects und combinations of elements which will be hereinafter more fully' described, shown inv the uccmnpuuying drawings, und the novel features thereof will he pointed out b v the up )ended claims.

lo obtain n full and correct understend ing oi the det-cils of construction, conlbinfid tions olE ieutures, elements and edv'unteges, reference is to be hed to the 'iereinsitcr forth. description und the scconiprtnyin drawings in connection therewith, who e:

Figure i is u front elevation of :in sp; u rutus ol the shove set forth type illustrating; t'he invention. Fig. it is o side eleva-tion of the device,illustruting more clcsriy the conthe lines' open,"

struction 'to the right of the sutomatic switch. Fig. 3 is e sectional View on the line SW3 of Fig. 1, for the purpose of illustruting more clearly and Adiegrammatically the location ol' the primary and secondary trsnst'oriner. Fig, 4 is u detail perspective View of s portion of the automatic switch, showing the operating handle therefor.

Fig. 5 is s sectional view through the ineens for operating the oscillatory clutch ber,

Melting renewed reference to the accompanying drawings, wherein similar reference characters indicate corresponding parts in the several illustrations, by -figures, l desiO- netos un iron box, in the center of which 1s located primer 'f and secondary windings of the transformers o and l), which seconduries of the transformers src utilized in starting up, by the operation of the hand operated switch hereinafter described, so that the current to the motors will be supplied at a. low voltage, that is when the hund operated switch is thrown into cooperation with the lower set of terminals 66, which areiheavily fused to carry the heavy current for starting. The equiva lent of the ntrsnsliormers, such es induction resistance, or any other substitute, may be employed, ifdcsircd. tUpon the front of this iron box ure vlixod :in upper and lower set of terminals 11 end il, whichA :ire fixed to a, nnirhlc slab c, this marble slab closes the iront of the iron box, es shown clearly in Fig. 3 oi the accompanying drawings, and is secured in position by Ineens of screws d, or any othersnitsble ineens. The upper row of the lower set oi terminals and the lower row of the upper set of terminals are electrically connected, shown et e; all of these terminels are fastened to the marble slab by their shank portions f thereof, being passed through apertures g, in the said slab, and securely lixed, by ineens of nuts 8, es clearly' shown.

To cooperate with the terminals, either the upper or lower set thereof, is an automatic sviitch la having knife blades 2, to coperatie with the lower set of terminals, and brushes 3,. comprising copper strips having therebetween strips of mica, 'there being three of these brushes similarly constructed, which tre clamped to concave portions 4 of the switch l, by :means .of convexed strips of bress 5, und screw 6, so es to provide resiliency for the seid brushes, as will Ibe cleerl evident from the drawings. This switc comprises a shaft 7, journalcd in suitable bearin 8, which shaft extends and rotates paralle with the face of the maible slab; projecting .from this shaft is a plurality of stub shafts 9, to which are secured the clamping memberslO of the concave portions 4, and of the knife blades 2 by means of screws 11b. Surrounding the stub shafts 9 and adjacent to the inner faces of the clamping members are sleeves 12, of any suitable insulat' material, for the purpose of insulatin t e brushes and blades.

. gThe -upper ends of the stub shafts are providedwith flan es 13 which are secured thereto b means o screw threads 14, to prevent dislp acement of the sleeves.

"cam eement 23, integra the circuit ojecting upwardly is an operating crank arm 15,l which is slightlyrearwardly positioned by means of a compound curve therein; this crank arm is provided y.with a hand rip 16, and below this grip is an opening 17, esigned to partly receive the end of the oscillatory clutchl -bar 18, the operation of which will be hereinafter described, which end thereof is bifurcated, as at 19, to receive an anti-frictional roller bearing 20, the shaft of which is journaled in the arms 21 of the said oscillato bar, which arms are formed by the said blifyurcation. This roller'bearing is desi ed to engage the rojection 22, of a lpor otherwise secured-to the crankarm, for the purpose" of holding the brushes resiliently in contact with the upper set of terminals, so as toclose etween them. The roller bear- A ing is held in' close engagement with said projection by A'a spring 24, one end of which i's secured to an eye 25, carried by the horizontally extending arm 26, of .the oscillatory clutch bar; while the other end thereof is sc cured to a screw 27, which is adjustably fastened to a laterally projecting lug 28, of the iron box, b means of the nuts 29, as will be clearly evi ent. It is equally manifest froman examination of the drawings, that the pivot 30 of the oscillatory clutch bar is of the adjustable type, thus effecting a close contact between the brushes and the upper set of terminals, and also compensating for the wear upon the said brushes. This adjustable pivot is obtained by means of a plate 31 y having' the pivot in 32, upon which the clutch bar is pivoted), and held thereto by any suitable means, referably a screw 33. This plate is provided) with four slots 34, through which the screws 35 projecting from the side of the said iron box, extend for the purpose of holding the said plate immovable when desired.

' guided in its The downwardly and rearwardly projecting arm 36 of the oscillatory clutch bar is movement by a bridge plate 37 securely fastened to the side of the box, clearly shown in the drawings. This arm 36 is provided at its lower portion, with va horizontal projecting orr ion 3S, upon which the weightV 39 falls, `w iii-h weight is guided in its fall by means of thi` guides 4() and 41, which guide 1 is provided with an opening 42 upon its side near the top thereof for the reception of the upper und 43 of the oscillatory latch bai', which is suitably pivoted, as at 44, the operation of which latch bar will be hereinafter described.

The lower end of the latch bar is bent at right angles, as at 45, and is provided with an enlar fed portion 46, carrying an armature 48, whidli is to be attracted by the magnet 49, when energized, which magnet is of the three phase type; the cam 50, at the upper end of the latch bar, will be held in the opening 4 2 of the guide 41, and into engagement with the friction roller bearing 51, journaled within the notch 52, of the weight 39, that is, when it is in its upper position, as will be evident. When the said magnet is in an energized condition, its current is received from the generator 72 through the leads 81, as will be clearly manifest.

For returnin the weight to its upper position it is provi ed with a thumb piece 53, as clearly shown. To prevent the 'arm 36 from being bent, at a point where it would strike the side 54 of the bridge plate 37, when oscillated by the fall of the weight, a stop 55 having a rubber covering 5 6' is provided, as clearly shown. The lower face of the weight is valso provided with rubber 57 toobviate the jar of the sudden fall thereof, against thehorizontal rejecting portion 38 of the arm 36, as will Ee understood.

When the magnet becomes denergized through the failure o f current supply, the cam 5() will be disengaged from the roller bearing 51, 'by contraction of the sprin 58, and the said latch bar having the cam be limited by the stop 59, as clearly shown in the drawings. lOne end of this spring is attached to an eye 60, of the latch bar, while the other end is fixed to an adjusting screw 61, mounted in a stud 62, which screw is rendered adjustable by means of vthe'wingcd nut 63, as is clearly illustrated in the drawings. Upon two of the sides of the iron box are positioned a cabinet 64, in one of which, is located the oscillatory clutch bar and the releasing means therefor, while in the other is located the hand operated switch 65, and the upper and lower cooperative terminals 66 therefor, which terminals and the A)ivot 67, for the said switch, are securely fixed to a marble slab (5S, as will be apparent.

l 1l are electrically connected by the leads 69, with the secondary of the transformers, while the upper row of the terminals 11 are upper set of terminals 11 as shown at e, as l hereinbeforc stated; the leads 71 electrically are secured to the shh` of the iron box; the

The lower row of the lower set of terminals electrically connected to the lower row of the sirenes Connect the upper set of terminals Go of thel A hund operated switch und the upper row of the terminals 1l, kof the automatic switch; and the transformers a and b electrieell.

eonnectedto the lower row of the terminals the leeds 73 with the terminals 67, oi' the hand operated switch, which terminals (57 form the pivot for the seid hand operated' switch, es will be readily understood fron a thorough examination of the drawings in.

corniection with the herein description.

in event of failure of' the current supply,

the automatic switch will he released from engagement with the clutch bar, efter which the said automatic switch will vibrate, prior to assuming e constant horizontal position, at right ongles to the fece of the iuzirhle slah c; this Vibration of the automatic switch is obtained hy ineens of the springs 75, which are 'wound in opposite directions uhout the l' Shaft 7, each of which springs has one end thereof fixed to seid shaft, while their other lends are fixed tov the slab c, es et 76, as will he clearly manifest. The upper row of the terlninnls V`1i ure in circuit with the motor HU and the motor generator 72, by the leeds Si, as clearly shown in Fig.y 1 of the eccomiponyn ing drawings. The hond operated switch is of the three ole linife t f )e hufviiw the usuel.

d il hv Ifuses, lund, the cabinet 'for inclosing seid switch is lined with shite, or eny other suit-' t knhle materiel; this hund operztted swltch is only utilized' whon it heroines necessary to shut down the motor, hut the :u itoiuntic switch could he operated `for this purpose, yet it is not 1good policy to do so, es there is o onsideu'nhle nrcing, reused hy opening the eircuit-of un eppur-tus of this character, when running` under loud. rlhis automatic .switch is opereted in two directions, lirst the downward, or starting position, second the upward or nigh voltage running position; when in the downw rrd position, the switch blades close the ffircuit between 1the two lower sets of teriniuuls, thereby ullowiirgT u,l

low wiltege current to poss from the secondories el" the tre-ristoro, to the motor, when operated in the uiniwurd, or running position, the hrushes will cot'ipernte with the upper set of terminals li, which will close the circuit therehetween, tuerehy allowing,r the high vol-- tege current to pees directly freni the feeders to the motor. y

In starting, the hund switch is thrown to its lower position und into cooperation with the ti-niniiiiels dwhich nre heu. 'il" "used to carry the heavy current 'for stfirlinpj. rihen the uutoi'untic switch thrown from .its new trol position to its lew'er. position und into coperatien with 'the terminals l l the motor is then receiving4 current at low voll; ge from the seconderies of the transformers. l/l/'henJ the hund operated switch und the automatic switch ere in engagement with the lower set of terminals 66 and 1l', current leaves the generator 7 2 through the leeds -73 to the teriuinels 67, of the hand operated switch, through the vblfides thereof und the lower of tern iuels 66, then the current advances through the transformers, through the uiediuiu of the leads 66a, end through the lends (ii) to the lower of teruliunls 11', through. the hludes 2 oi the eutoumtic switch, that is to sity, when in its lower position, to and tl'u'ough the upper of terminals 11', thus advancing' ou to the three phuse motor 8l), through the lends Sl es will he readily truced from the drawings. rl his current when the two switches nre .in their lower position, is flowing' in rapid succession, through one leud end thon4 the other, und then heck signin through one ol" them that is not utilized for the advancing current; it will he readily ol served, from the shove, that the motor 8() is recoisingf current et e low voltage from the sccondnrics of the transformers. After tho motor hns started hoth hund und -nutoiuotic switches are lifted to their ripper position und into -o 'ipe.":ition with the upper set of termi-- nuls, und while in this position the motor or generator is thrown directly across the line, therolry-cutting thc trnnsforiners out of rircuit. lfhen the :uitouintic switch is thrown into cooperation with the terminals 'll it is held in close contact therewith, hy the clutch her, .until relcusod hy the releasing` niccloinA ism, which is operated through the failure of current supply. `when the hund operated und automatic switches aire in their upper positions, es shown in Fig. l oi the drawings, current leen/es the generator, advancing through the leads 73, that is, alternately through one und then the other, to the terminnls (37, through tle hhides of the switch (i5 und through the upper set of lern'vinals 66, to the upper set of tern'iinels ll, through the inediu'ui of the leads 7] und then the eurrei'it advances on through to the upper set of terminals ll, through the hiushes Send the metallic electrical connections e, upon the heel; of the merhle slab c, then the current continues ou to the motor, through the leeds Si, :is will he clearly manifest` l his current is also flowing in rapid succession, as when the seid switches nre in their lower positions; thus it will he seen, when tracing this lustmentioned flewy of' current, that the transfmrners ore eut out of the circuit, and the motor und generetor ere thrown directly across the line, thereby generating e, high Voltege current. This .failure of current' su pply muy he eitherenused hy e. breakage nlongthe hue, or hy thro wing the h end operated switch to a horizontal or ueutrel position, es will he manifest.

it .is to he understood that `various changes end modifications muy he employed Iin the 1 ate with said switch, Yand a vertically movment with the upper set ot' tcrminals,- and means for releasing'said adjustable means.

construction and embodiment thereof, coirbinations of features, and elements, without in any way departing from the spirit and scope ol the invention covered'by the claims thereof; it being understood lthat whatever g variations. or modifications are employed must fall within the scope of the appended claims.

From the foregoing, the essential `features, elements and the operation ol the device, together with the simplicity thereof, will be clearly apparent.

Having thus fully described the invention, what is claimed as new end useful by the protection ot' Letters l)atent,"is:-

l. ln an automatic release cr no' voltage starter, "an automatic switch, terminals therefor, an oscillatorqiiclutch bar to coperable member for actuating the clutch bar and an electrically'controlled latch. bar for supporting said member.

2. ln an automatic release starter, an automatic switch, terminals theretor, an adjustable oscillatory7 clutch bar, releasing means therefor, and electrical operated means lor controlling said releasing means.

3. ln an automatic release starter, an automatic switch, terminals therefor, adjustable means for holding said automatic switch in close contact with its upper set of terminals, a vertically movable member lor releasing said adjustable mea-iis, an electrically controlled latch' bar for releasing said` ngember through the failure of current suppi. ln an automatic. release starter, an automatic switch, knife blades and brushes g carried by said switch, an upper and lower set of terminals therefor, adjustable. means for holding said brushes in close engage- 5.111 an automatic release starter, a switch, an adjustable lever *controlling the same, and-a movable member controllable by the current supply and adapted to be relever to release the switch.

l leased by 'failure thereof to actuatc saidl l 6. ln an automatic release `starter, a;

switch, a lever controlling the same, and a for holding said brushes in close engagement gravitating member controllable by the current supily and adapted to be released by failure thereof to actuate said lever to re-l lease the switch and vertical guides for the gravitating member.

7. ln an automatic release starter, a switch, .an adjustable lcvcr controlling thc same, and a gravitating member controllable by the current supply and adapted to be released by failure thereof to actuate said lever to release thc switch. l

8. ln :in automatic release starter, a

switch, an adjustable pivotcd lever' controlling the saine, and a gravitating ineinerases bei' controllable by the current su ply and adapted to be released by failure t ereof to actuate said lever to release the switch.

9. ln anautomatic release starter, an

automatic switch, an adjustable pivotedl clutch bar controlling the saine, and a mov able member controllable by the current supply and adapted to bc released byfailure thereof to actuate said pivoted clutchA bar vertical guides for the movable member.

10. In an automatic release starter, ati

automatic switch, an adjustable pivoted clutch bar controlling the same, and a mov? able member Vcontrollable by the current supply.

il. In an automatic 'release starter, an automatic switch, an adjustable pivoted clutch bar controlling the saine, and a gravitating member controllable by the current supply and adapted to be released by failn ure thereof to actuate said clutch bar to release the switch.

12. ln an automatic release starter, an automatic switch, .an adjus table clutch bar controlling the saine, and a gravitating member controllable by the current supply.

13. In an automatic release starter, an'

automatic switch, an adjustable pivoted means controlling the same,`and a gravitating member controllablel by the current supply 'and adapted to be released by failure thereof` toactuate said adjustable pivotcd means.

1 4. In an automatic release starter, an automatic switch,4 an adjustable pivoted means controlling the same, and a gravitatirg member controllable by the current supe r `15. ln 'an automatiorelease starter, an automatic switch having knife blades and brushes, an upper and lower set of terminals therefor, an adjustable clutch bai` controlling the switch, and a gravitating'niember controllable by the current supply and adaptedto' be released by failure thereof to actuate said clutch bar.

` i6. ln an automatic release starter, an'

i automatic switch having knife blades and brushes, an upper and lower set of terminals thereior, an adjustable pivoted clutch bar 'holding said brushes in close engagement with the upper set of terminals, a grayitat'# ing member, a spring actuated latcli'iarfoi supporting said gravitating member and controllable by the current supply and adapted.

vco

'as'ftion of the cam for holding said brushes in gaged by said clutch bar and an independent golfing.,

latch bar .a catch, an adjustable pivoted clutch bar-de- Aclose engagement with the upper'set 'o ter- "l leased by failure thereof to actuate said clutch l ndin arm said arm havlnff a cam forminor D D rent supp y and adapted to be re eased by.

erases to be released by failure thereofto actuate 1 said clutch bar.

'125.v In an automatic release starter, an automatic switch, having knife blades and brushes, an. upper and lower set of terminals therefor, an ad}ustable pivoted clutch bar for said brushes 1n close engagement with the upper set ofterminals, a movable member, indes therefor, a spring actuated Ier supporting said movable mem-- be;` and controllable by the current supply arid adapted to be released by 'failure thereof to aetuate said clutch bar.

19. In an automatic release starter, en automatic switch having knife blades and brushes, an upper and lower set of terminals therefor, said switch having an upwardly ex* tending arm, said arm having a cam 'forming signed to engage said catch through coperatlon of the cam for holding said brus es in minals, a movable member, guides therefor, said movable member being controllable by the current supply and adapted to be rebar.

r A20. In an automa-tic release starter, van automatic switch having knife blades and brushes, an upper and lower set of terminals therefor, said switch having an upwardly exa catch, an adjustable pivoted clutch bar designed to engage said catch through coperaclose engagement with the upper set of terminals, a movable member, guides therefor, a spring actuated latch bar for su )porting said movable member and controllable by the current supply and adapted to lgiased byfailure thereof to actuatc said clutch ar. 21. In an automatic release starter, an automatic switch, a sprin0r actuated adjust able pivoted clutch bar for controlling the same, a movable member controllable b the current supply to be released byfailure t ereof to act'uate said clutch bar.

'22. In an automatic release starter, an automatic switch having an upwardly extendingarm, said arm havmg a cam forming a catch, a spring returned adjustable pivoted clutch bar designed to enga e said catch for controlling the same, a mova le member controllable by the current su ply and adapted to be released by failure t ereof to actuate said clutch bar. y l

23. In an automatic release starter, an automatic switch having an upwardly extendin arm, an'oscillatory spring returned clutch ar, said arni havingmeans to be engravitatin member controllable b the curfailurethereof to actuate said clutch bar.

2d. In an automatic release starter, an automatic switch having 'an upwardly sie tending arm., an adjustable pi'voted spring returned clutch bar, said arm having means to be engaged by said clutch bar, agravitating mem ber controllable by the curren t supply and adapted to be released by failure thereof to actuate said clutch bar.

25. In an automatic release starter, an automatic switch havingan upwardly exm tending arm, ran adjustable spring returned clutch bar, said arm having' means to be engaged by said clutch bar, a gravitating meub ber, guides therefor, a pivoted supporting latch bar to support said gravitating member, said latch bar having an armature at its lower end, a magnet controllable by the curn rent supply for controlling said latch bar, through the i'ailurc of which current supply the magnet will be controlled for releasing the pivoted latch bar.

26. In an automatic release starter, an automatic switch comprising a lshaft having a plurality of' stud shafts, knife blades and brushes carried by said stud shafts,- said automatic switch having an upwardly eX- tending arm, an adjustable pivoted spring returned clutch bar, said arm having a cam forming a catch device to coperate with said clutchbar, movable member, guides therefor, a ivoted latch bar for supportin said movab e member, an armature carrie' at the lower end ci said latch bar, a magnet controllable by the current supply for attractinr said armature 'for controlling said pivoterly latch bar through the failure of which current su ply the magnetV will be denergizedthere )y releasing thc pivoted latch bar. i

27. In an automatic release starter, an automatic switch comprising a shaft havin a plurality ci stud shafts, knife blades an brushes carried ,by said stud shafts, said automatic switch having an upwardly extendingnrm, au adjustable pivoted spring returned clutch bar, said arm having 'a cani forming a catch device to vcoperatie with said clutch bar, a movable member, guides therefor', a pivoted spring returned latch bar .for supporting said movable-member, an

armature carried at the loweriend of said latch bar, a magnet. controllable by the current su ply for attracting said armature Vfor control ing said 'ivoted spring returned latch barthrough t e 'failure of wlnch current supply the magnet will be denergized therebyre easing the pivotedlatch bar.

28. In an automatic release starter, an automatic switch comprising a shaft havin?r a plurality of stud shafts, knife blades an brushes carried by said stud shafts, an upper and lower set of terminals to cooperate with said .knife blades and brushcsj'said switch having an upwardly extending arm, a pivoted spring returned. clutchbar, said armA thus releasing said latch bar, a generator in circuit with said automatic starter andl l primary and secondary transformers 1n the i circuit of said generator and automati'. l

Astarter for decreasing and increasing the voltage thereof'.

29. 'In an automatic release mechanism, an automatic switch, a pivoted clutch bar, controlling the same, and an independent movable non-pivoted member controllable by thecurrent supply` 30. In an automatic release mechanism, an automatic switch, a pivoted clutch bar, controlling the same, an independent movable memrber controlled by the current supply, andV guides for the said member.

' 31. In an automatic release mechanism, an automatic switch, terminals therefor,

means for controlling the same, and means movable by itself for releasing the firstnamed means, and a pivoted latch bar controllable by the current supply for controlling said movable means.

Y 32. In an automatic release mechanism, an automatic switch, adjustable ivoted means for controlling the same, an independently guided 'means for releasing the said first-named means. l

33. In an automatic release mechanism, .an automatic switch, adjustable means for controllingthe same, and independently guided means for releasing 'the said firstnamed means, said independently guided means being controlled by current supply and adapted to 'be released through the failure thereof.

34. In an automatic release mechanism, an automatic switch, adjustable `means for controlling the same, and independently guided means for relfasing said adjustable 35. In an automatic release mechanism, an automatic switch, adjustable means for controlling the same, an independentl movable member for releasing said mi 'ustable means, an electrically controlled atch bar for releasing said movable member.

36. In an automatic release mechanism, an automatic switch, means for controlling the same, and independently movable guided member for releasing said controlling means and a pivoted latch bar controllable by the current supply for releasing said member. 'l

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.V

ANTHONY-J. BURNS.

W'itnesses:

THOMAS N. DEWINE, Jas. A. HEArm's.

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