US989687A - Self-starter. - Google Patents

Description

E! E. mmm.

STARTEE. APPLIOATIOH. FILED MAR. 14, 1907.

mm: ram: 14, was.

T. E. BARNUM.

SELF STARTER. .APZLIOATIOH FILED HAR.14,'1907. RENEWED JULY 14 1909. gggg gzggi Patented Apr. 18, 1911.

2 SEEBTSSHEET 2.

WNEZTEE PATEYWE THOMAS E. BARNUM, OF MILWAUKEE, "\VISCONSIN. 11$SIG-NOB TO THE (EUTLER- HAMMER MANUFACTURING COMPANY. OF MIL'WAUKEE, WISCONSIN, A COI-T SELF-STARTER.

Patented Apr. i8, T 111.

Application. filed March 14, 1907, Serial No. 362,353. Renewed July 14, 1909. Serial No. 507,58

To all whom it may concern:

Be it known that l. THOMAS E. BARNIYM, a citizen of the United States, residing; at i\lil\\'aul\'ee. in the county of Milwaukee. and State of ll'isconsiu, have invented new and useful improvements in Self- Starters. of which the following a full, clear, concise, and exact description, reference being had to the accompanying drawing. forming apart of this specification.

My invention relates to self starters for electric motors, having for one of its ohiccts the provision of a single electro-responsire device for operating" a main switch for controlling; the motor circuit, and the res' mince controlling member of the starting device.

sinothcr object of my intention is to provide in a. motor starting device, means which prevents the closing of the switch for controlling the motor circuit, until all the resistance is in circuit with the motor.

F or the purpose of disclosing my invention, I have illustrated in the accompanying drawings. one device embodying the'principle thereof.

in said drawings: Figure l is a front elevation a motor starter embodying my in vention, Fig. 2 is a diagrammatic View show ing the circuit arrangement thereot, and Fig. 3 is an enlarged detail view of a switch shown in Fig. 1.

in the device illustrated in Fig. 1 upon a suitable base or panel 2 resistance contacts 3 are circularly mounted. fin arm pivotally mounted upon a stud 5 secured through the base, is provided at.- one end with a. brush (3 arranged to sweep over. and make contact.- with thecontact plates 3. The brush (3 is preferably held in close engagement with the contacts 3 by means of a spring pressed v arm 7, secured to the arm 4;. The opposite end of the arm is provided with a projection S pivotally connected to a piston rod 9, the piston of which operates in a dash-pot 10, pivotally mounted at 11 upon the base 2. The arm at is also provided with a contact brush 12 arranged to engage a contact 13 also mounted upon the base 2, for a purpose A soleniore fully hereinafter set, forth.

mounted upon the base 2 by bolts oid 14 o passing through lugs 16 formed on the frame ther ot. The core 1? of the sole d s onnected -her suitable inlr I? termed insulating material. A switch 18 for controlling one section of resistance in circuit with the winding of the solenoid 14., is mounted on the base 2, above the resistance controlling" arm 4: and in a. position to be opened by a. projecting screw 19 mounted upon, the outer end of the arm. This switch is prcfcrabl of the structure illus- "trated in detail in 3, and comprises an arm pivoted at- 20 and having at its outer end a contact. 21 arranged to engage a contact plate mounted upon the bare 2. The inner end of the arm 18 has a toggle connection with a small. arm 23 pivoted at 2-5: upon the base 2. The arm 23 is jil'OVltlPtt with a cylindrical portion 25 having its end bifurcated or slotted. to receive a, pin so ried by the arm 18. A coil. l sp mounted on the cylindrical. portion o1 i. arm 23, tends to maintain the arms 23 and 18 out of alinement. By this construction when the end of the arm 23 is thrown downwardly, the contact 21 is moved into engagement with the contact plate 22 and the tog gle connection is thrown to the position illustrated in the drawing. The switch wil. remain in this position until the projection or screw 19 on the outer end of the arm engages the arm 18 and opens the same, reversing the position. of the toggle, which will retain the switch 18 open until a small insulating: disk 28 carried upon the lower end of the core 17 engages the inner end of the arm 23 and closes the switch 18. The disk 28 arranged upon the lower end. of the core 1'? will. not engage the arm until the arm 4 is almost to its lowermost position.

until the. arm 4: is in a -full oii position.

The main switch for controlling the motor circuit is mounted upon a suitable insulating base or block 29 secured upon the top of the frame of the solenoid 1 1-. This block may be of any suitable material, as soap stone or the like, and is additionall in lated from the frame of the solenoid 14 by small tiber disks 3O interposed between he bottom of the block and the top of the frame of the solenoid. The main switch is 111012113- ed upon the upper side oi? "the block, an comprises a. main contact 31. and an i contact 3'4". The contacprefer suits the same 111G111 which operates with pole piece contact plate has mounted thereon 1i ca hon contact 36 arrangei'l to he engaged I the arcing contact 37. The arcing contact 3 is preferzil'ily mou tcci upon the cm? of th spring :1 m 38, carried by the IUfl or" am porting member 33. A

V ii'l' :irin fii) intel-posed between the main Contact 31 and the :11'111 218 of thi :ii'cing contact to n'ci'ent the arm 38 from coining into engg' ement with the main PUiliHCi'. The min 55% of the arcing contact is OXliCilltlOli to 'foi'in cm'vcil sup citing mini and connected tot-l1 E) crews or other suitable meanc lhhzSlS the :11111 in .nmintnining the contacts in an open poiition iiiitl in order to relieve the iii-iii 'O'i i1i1O arcing contact oi can-13' ihe main current. which Woi'iltl tencl to (lo te'iiornte the spring of the stin'ieya braided contlncto 11 is connected between the main contact 3 :unl the minding; post, 2 mounted upon the base 29. i

The contacts of the main switch or. ranged to leave the contu ct plate in the in net in which the 11:1 ve been named,v the; i the nniin contact 31 first iesvcs the plate r then the arcing Contact leaves Contact 36. The support 33:11pm) Whi v 1 main switch is' 'nontotczl is connected by :1 fiber link 4-3 with a core i of the solenoid 14; whereby the main switch is opemtcifi hy mini t i'iipt the llC formed heij wen in Gl'(l0l' to the arcing contact and it; corresponding carbon contact blowout magnet IYIOUI'ltWl upon the base and provu (l .26 which GZljQllCi iipiuii-Ty sicle of the arcing contact.

the blowout mm I is conllPCl'Ml with the Contact plate J5 anti the oi'jheir terminal thereof is connected with the binding post l? of the series of binding" posts; 4-7, 48, and which are also inoun' upon the base 2 12ml to which the Various conduc- L'oi'F-i of the motor and main line cii'fciiiis are connected.

In the circiiit arrangement illustrated in. the motor zii'n'izitm'e having 21 shunt field 51, connected in series with the resistance 52 which is divided into scctions, and connector] with the IQSiSiJiHCC contacts 3. The Winding of the solenoid is -mimi ji in a shunt circuit and has 1m" gm in c .iCS illCIO with, 21 resistance 5? Piili'i :1 re 1 and up( 1 either One terminal of that the hand switch 35 and the knife 56 are ant will then iii-'3). from one sii'lc- 57 of the main line thin the comlucloi.

58 through the switch 5;), 0y conductor 5 though lhe winding of the .OlfillOili 1-4;, by comluclm' (30, across it] ;it :h l8 ctmduchn: 7"

1U 61 to the insulated conic controlling, :ii'in -ll '5 upon the ciin'itzict un cui'i'eht will, therefor; )ZLSS from this contact ill'lfUS-i ihe I'Gb ,znnce controlling mun,

hy conductor 2 to the opposi si lc (553 of the main line. The s enoid ii is thus ei'iciigizcil :iinl nttmet its (for Q? and 49!. which stzu'ls the i'esit: nee controlling Zlih moving ii i iwiirdly and the some time cio the main s'iviteh contacts 3i \ntl 9-7, A :11 so the min 41 leaves the i siilnllcii cont; th short cii'cnit tin-on the coinluctoir 1 o icneil :iml the 'j'OSlSliU'H'Q .3? in, iei I circuit with the Winding; of the n'mgg net L pas thi'm: the'z'nzignet as it is nnncce. i' :l )1 the so noid to he. '3. as great Strength lo iii-av; the starter arm as it nct-iis to close the in: switch. is soon no the main line hwi clots then current xiii How from one ,i

oi. LiIHJ main line through the condo tor conductor 6;, through the vriniilin jiowout magnet 5 -3 ACIXFS the uni .iy comluctci: (J5, throu h the run; he n'iotei', through the U, 5* the resistance controiling arm conductor so to the opposite sitle 33 of he 11min line. l

J switch, .m'e 3') ct Circuit will also be do, Cinctor 65 through shunt field by conductor (36 to the opposite Gide In line. The niotoi' will. i I s the arm continues to he i'iz'awiy, the resistance in by seciion :miii cm; out. ii hen the 2 4 on. )USii.i0il the projection of the arm the SW1" "he same and inscrtitog the resists 't with the solenoid 14'.

the current pzi li is red iced to such an tent ihin i Wili i'etziizi the arm 4} in ite position, :nd the main sn tch closed not he of suiiicient str in event it falls, or clo l 1 event it 01 ens. When the m1 its full on position, t e c u engage contact 13 and e only of the covriuctor f" i esieml o conizict brush czufricd on the eml othe i "In i l'iith the motor 'iig with i'i 3X- nnce cut out in event the volt 1 hilio below preilelevmiiiefi ntire V, the soienoiiil i iil. inin enci led, or the i iii be it (lown' to such lllt ihe nizzin i lch Will open, the ehy opening the illfiifii ci 'ciiit 21ml the 23111'1 T (hop to "he oi' pi "ion when, the voiizige zi mist the cycle of operation x'evionsiy LlQSCLKiJEA cease-7 the line is restored to normal, before the arm l drops to its .inll oil positiomthen the solenoid 14 might be of sufiicient strength to retain the arm. 4t in an intermediate position or move the arm back to the full f on position, but it will he noted that the resistance 54 is still in circuit with the winding of thesolenoid Li, and it is not of snilicient strength to close the main line switch, therefore, themotor will not start. Under these circumstances, if it is desired to again start the motor, it will be necessary for the attendant to first open the switch 55 to deenergize the solenoid and permit the resistance -controlling arm l to return to its off position, when the switch 55 may again be closed and the starting device will operate to start the motor.

-While-l have described in detail one form of my invention it will be understood that I do not wish to be limited to the structural details illustrated and set forth herein, but that various changes and modifications may be made Without departing from the spiritof my invention as set forth in the append ed claims.

Having thus described my invention. what I claimas new and desire to secure by Letters Patent is: I 1. In a controller for electric motors, in combination, a main switch, a resistance con trolling switch and a single electromagnetic Winding for operating said switches, said winding having two movable cores, each core being connected to one of said switches.

2. In a controlling device for electric motors, in combination, a main switch, a re sistance controlling switch and a single electromagnetic winding for operating said switches, said winding having two plungers movable in opposite directions, one of said plnngers having a tapered end adapted to enter acorrespondingly shaped recess in the end of the other of. said plnngers, each of said plnngers being connected to one of said switches.

In a starting device for electric motors, in combination, a main switch, a pivoted re sistance controlling element, a series oi contacts adapted to be successively engaged by said element, a resistance connected to said contacts and (i-single electromagnetic Winding for operating said switch and said resistance controlling element, said winding having two plnngers movable in opposite directions, one-of said plungersbeing connected to said switch and the other to said. resistance controlling element.

In a starting device for electric motors, the combination with a resistance, of a controlling member therefor, a main line switch, a single electromagnetic 'inding having two movable cores, one of said cores beingconnected to said resistance controlling member and the other of said cores to said main line switch, and means necessitating the insertion of a predetermined amount of said re:

,sistance ,in the motor circuit prior to the closure of said main switch.

5. In a starting device for electricmotors, the combination with a resistance, of a con.- trolling member therefor, a main line switch, an electromagnetic winding having; two plungers movable in opposite directions and adapted to seal with one another at the limit of their travel, one oi said plnngers being operatively connected to said-resistance controlling member and the other to said main switch, and means rendering said winding inoperative to close said main switch under predetermined conditions.

6. In a starting device for electric motors, the combination with a resistance, oi a controlling; member therefor, a main line switch, an electromagnetic winding having two plnngers movable in opposite directions, one

of said plungers being operatively connected to said resistance controlling member and the other to said main line switch, a, resistance connected in circuit with said winding for rendering the'same inoperative to chose said main switch, and means for auto maticallv removing said resistance from circuit when said resistance controlling memher is in a predetermined position.

7. In a starting device for electric motors, the combination with a resistance, or a controllingmember therefor, a main line switch and an electromagnetic winding having two, movable cores, one of said cores being con-- nected with said resistance controlling'memher and the other to said main line switch, means necessitating the insertion of a re determined anionnt of said resistance in the motor circuit-prior tot-he closure of said main switch and means for automatically rcdncing the flow of current through said winding after said resistance has been removed from the motor circuit.

8. In starting device for electric motors,

the combination with a resistance, of a con trolling member t ierefor, a main line switch, an electromagnetic winding having two movable cores, one otsaid cores being connected to said resistance controlling member and 'the other to said main line switch, means necessitating the insertion oi a "e: determined amount of said. resistance i he motor circuit prior to the closure of said main switch, a resistance connected in circuit with said winding, a switch for short circnitingr said resistance, said switch being automatically opened by said resistance con; trolling men'iber when in a predetermined position and antomiitically ,closed upon the insertion of a predetermined amount ot said starting resistance in the motor circuit.

9. In a starting device electric motors,

lit)

the combination with a startin resistance, of a controlling member theret or, an electromagnetic winding for actuating said member, a resistance connected in circuit with said winding, a pivoted switch adapted to short circuit said resistance, said switch being automatically opened upon the removal of all of said starting resistance from the motor circuit, and a pivoted arm having a toggle connection with said switch for maintaining the same in open position, said pivoted arm being arranged to be automatically operated to close said switch upon the insertion of a predetermined amount of said starting resistance in the motor circuit.

10. 111 a starting device for electric motors, the combination with a starting resistance, of a controlling member therefor, a main line switch, an electromagnetic winding having two plungers movable in opposite directions and adapted to seal with one another at the limit of their travel, one of said plungers being operatively connected to eases? said controlling member and the other ct said plungers being operativcly connected to said main switch, a resistance connected in circuit with said winding for rendering the same inoperative to close said main switch, a shunt circuit around said resistance adag'ited to be closed while said controlling member is in a predetermined position, a secont'l rcsistance connected in circuit with said winding, a switch for short circuiting said second resistance, said switch being autoinatically opened by said controlling member when in a predetermined position and closed by said controlling member when all of said start ing resistance is in circuit with the motor.

in witness whereof, i have hereunto subscribed m name in the presence ol two wit nesses.

Til-t )iiL-k. E. i

lVi tnesses:

()scan A. Knmaon, A. ll. BARMIKEL.

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