US2284323A - Welder - Google Patents

Description

May 26, 1942.

1 F. K INGERY WELDER 2 SheetsvSheet l Filed July l2, 1940 May 26, 1942. l.. F. KINGERY WELDER Filed July 12, 1940 2 Sheets-Sheet 2 INVENTOR j L l w d) Patented May 26, 1942 WELDER Leroy F. Kingery, Stockton, Calif.,` assignor, by direct andmesne assignments, to Shober Sales, Inc., Stockton, Calif., a corporation of California Application July 12, 1940, Serial No. 345,131

7 claims.'

` This invention relates generally to an improved A. C. Welder, and in particular the invention is necting wiring, the numeral I indicates a horidirected to, and it is my principal object to provide, a powerful and compact A. C. Welder constructed so that the impedance` may be' varied through quite wide limits and with a nicety of adjustment unique in apparatus of `such type.Y

Another object of the invention is to provide an A. C. Welder which includes a novel form of controlling reactor; such controlling reactor being arranged with a rotor unit mounted for axial rotation relative to astator unit.

A further object of the invention is to provide improved means to lock 'the' rotor unit in any selected position of adjustment relative to the stator unit.

A further object of the invention is the provisionof a non-metallic, non-magnetic casevor housing forthe apparatus whereby, when the Welder is in operation, to reduce hysteresis and eddy currents, lower the overall losses, and imfprove the quality of the welding arc.

Another object is'to provide a Welder whose operating characteristics are the same regardless of Whether a low or high voltagesuch as 220 v. or

440 v is used.

A further object of the invention is to produce which will be exceedingly eiective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several Views:

Figure l is an elevation of the Welder; the case being shown in section, and the wiring being omitted.

Figure 2 is Ya top plan view with the case removed.

Figure 3 is a top plan View with the case partially broken away.

Figure 4 is an enlarged fragmentary sectional elevation of the control wheel and locking lever assembly.

zontal and rectangular supporting frame which is formed from angle iron and mounted at its corners on caster wheels 2. An initially open bottomed case C, formed mainly of non-metallic, non-magnetic material, engages at the bottom about frame I and is removably secured thereto by screws 3; such case being of substantial height.

A close coupled transformer 4 is disposed in the case C adjacent the bottom thereof; the core 4a of such transformer resting at its ends on a pair of spaced wooden bars 5 extending parallel between and supported by frame I. Other corresponding wooden bars 6 rest atop the core 4a of the transformer 4; there being. tie bolts I connecting between bars 5 and 6 on both sides of said core. The transformer is of conventional design and Wound for an input or primary voltage of 22o-440 and to supply a constant output or secondary voltage of approximately 80 volts.

Wooden cross bars 8 extend between the ends of bars 6 and are supported thereon in secured relation. The reactor is supported by cross bars B and includes a stator and rotor constructed and mounted as follows:

The stator includes an elongated, U-shaped and laminated core 9 seated at its ends on cross bars 8 and attached thereto by lugs or ears I0. Intermediate its ends the core 9 is wound with a pair of coils II, such coils being disposed in adjacent but longitudinally spaced relation. These coils, as will hereinafter appear, are wired in series and thus have the same effect as a single coil.l However, in order to facilitate mounting of the rotor by means of the hereinafter described structure, the coil assembly for the stator comprises the aforesaid pair of coils disposed in spaced, parallel relation.

The rotor comprises a straight, laminated core -I2 disposed in a horizontal plane above the stator core 9; the stator core 9 and rotor core I2 being of the same length. A pair of coils I3 are wound on rotor core I2 and are spaced apart in substantially the same manner, ,and lfor the same reason, as. the spacing of stator coils` II; coils I3 likewise being Wired in series. The rotor core I2 is disposed adjacent but above the plane of the upper ends of the upstanding legs L of stator core 9 whereby said core I2 may revolve in a horizontal plane; the lower portions of coils I3 depending into the eld between said vertical legs L of core 9 but terminating short of .the upper end portions of coils II. The rotor, constructed as above described, is rotatably supported as follows.

A vertical tubular sleeve I4 extends through core I2 between coils I3 and is secured-ln rigid relation with said core. A vertical supporting rod I5 is fixed at its lower end in stator core 9 between coils II and extends upwardly through ited downward movement against the compression of spring' I1.

An upstanding elongated band or ring I8 of dielectric material extends horizontally through the space between the vertical legs of stator core 9 and extends some distance on both sides of said core. 9 and is of lsuch height that its upper edge is disposed slightly above the upper ends of the vertical legs L of said core; the rotor core I2, when in position for rotation, having its lower edge disposed in clearance relation to the upper edge of said ring.

A hand wheel I9 is xed on the upper end of sleeve I4, the rod I5 projecting somewhat above said hand wheel. A collar 20, having an upwardly facing cam 2l, surrounds the rod I5 above the hand wheel; there being a cooperating cam-collar 22 fixed on the rod `and engaging said-upwardly facing cam. Alhandle 23 is formed with and extends substantially radially from collar 20.

When the cam and collar are in one position, the rotor is free and may be rotated by manipulation of hand wheel I9 to any desired position relative to the stator. When the rotor is in such position, the collar is rotated by means of handle 23 in a direction to cause downward'v movement lof sleeve I4 relative to rod I5, and frictional engagement of rotor core I2 with the dielectric ring I 8. This locks the rotor against accidental movement from its position of adto stator core 9. The scale 25 is graduated so that the operator can determine the exact amperage at which the Welder is operating.

An upstanding dielectric block 28 is mounted on one of the cross bars 8 to one side ofthe stator, such block supporting the input terminals 21; access to such terminals 21 being had through a ported plate 28 mounted by suitable means over an opening 29 in .the side of the case adjacent said terminals. Plug-in type output terminals 30 are mounted on the opposite side of the case in adjacent but spaced relation. The terminals 30 are of conventional type and are each threaded into a dielectric supporting plate 3I which is afiixed to adjacent members 5 and 8 parallel to but spaced from one side of the case and with each terminal in register with an enlarged opening 32 in said case. A locking nut 33 prevents accidental unthreading of each terminal from dielectric plate 3I.

The circuit for the welder is shown diagram- Such ring is xed with stator core matically in Fig. 6. Input leads 34 supply a 22o-440 A. C. voltage to terminals 21 on terminal block 26. From terminals 21 lead wires 35 connect withthe input or primary coil 38 of transformer 4. One of the leads, indicated generally at 31, of the output or secondary coil 38 of transformer 4 connects with one of the output terminals 30, while thev other lead '39 of said coil connects with one terminal vof series connectedcoils Il of the stator. 40 from series connected coils II extends to and is connected with the other one of the output terminals 38. The series connected coils I3 of the rotor are connected at one end by a flexible wire 4I with wire 39, while the other end of said series connected coils I3 is connected by another flexible Wire 42 with wire 40.

It will be seen that with rotation of the rotor throughan arc of from its zero position, the impedance of the reactor is varied from maximum to minimum and this varies the current which the Welder delivers from low values to' high values. Furthermore, by means of the hand wheel I9, the position of the rotor may be changed readilyA and easily' and to anyl extent desired, thus giving a nicety of adjustment, as well as a wide range of operating amper-age.

As the case C is mainly of non-metallic, nonmagnetic material, there is a reduction in hysteresis and eddy current, a lowering of the overall losses and an improvement in the quality of the arc. f

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills4 the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is:

1. In an electriowelder, a reactor including a y said legs, means mounting the rotor adjacent l the ring for rotation in a plane parallel to said edge of the ring and for axial movement toward said ring, and manually actuated means to move said rotor into engagementwith said ring and releasably secure the rotor in said position.

2. A device as in claim 1 in which the axis of the rotor is substantially coincident with the axis of the ring; said rotor including a core of a length such that the ends thereof overlap the ring at all times.

3. In an electric Welder, a reactor including a. stator and rotor, each having a core and a coil, means mounting the rotor for rotation relative to the stator and for limited axial movement, and a friction holding element mounted for engagement by the rotor upon predetermined axial movement of said rotor; said means including a rod fixed at one end on the stator core, a sleeve fixed on the rotor core, the rod engaging in said sleeve, a compressi-on spring on the rod between the stator core and the adjacent end of the The other lead.`

sleeve, and manually actuated means to shift the sleeve on the rod and hold said sleeve against the compression o! the spring whereupon the rotor engages said friction element in holding relation.

4. A device as in claim 3 in which said manually actuated means comprises al collar rotatably mounted on the rod beyond the outer end of and resting on the sleeve, said collar having an annular cam formed on the outer end thereof, and a cooperating cam member iixed on the rod and riding said cam.

5. In an electric welder, a reactor including a stator androtor, each having a core and a coil, means mounting the rotor for rotation relative to the stator and for limited axial movement, and a friction holding element mounted for engagement by the rotor upon predetermined axial movement .of said rotor; said means including a r'od iixed at one end on the stator core, a sleeve xed on the rotor core, the rod engaging in said sleeve, a compression spring on the rod between the stator core and the adjacent end of the sleeve, a hand wheel mounted on the outer nd of the sleeve. the rod projecting therebeyond, a collar xe'd on the projecting portion of the rod, another collar turnable or the rod and engaging between said ilrst named collar and the hand wheel, the adjacent faces of the collars being formed as cooperating cams,

and an actuating handle projecting from said last named collar.

6. In an electric Welder which includes a stator, a rotor, and means mounting the 4rotor in space-il relation to the stator; said means supporting the rotor for rotation and limited axial movement from a rotative position toward the stator, afriction holding member disposed between the stator and rotor in clearance relation to the latter when the same is in said rotative position, and means arranged to effect axial movement of the rotor toward the stator into engagement with said member whereby to hold said rotor against rotation. .Y

7. In an electric Welder which includes a stator,

a rotor, both the stator and rotor having a core,y

and means mounting the stator and rotor and the included cores in spaced relation; said means supporting the rotor for rotation and limited axial movement toward the stator from a rotative position, a friction holdingring disposed axially between the cores of the stator and rotor

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