US1810212A

US1810212A - Electric tool

Info

Publication number: US1810212A
Application number: US327631A
Authority: US
Inventors: Robert L Hinds
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-12-21
Filing date: 1928-12-21
Publication date: 1931-06-16
Anticipated expiration: 1948-06-16

Description

R. L. HINDS ELECTRIC TOOL June lG, 1931.

Filed Dec. 21, 1928 r N 5 I Pateted !une 16, 1931 .UNITED STATES i ROBERT L. EINDB, OF TOLEDO, OEIO minerare 'mon Application filed December 21, 1928. Serial No. 327531.

This invention relates to tools for acting on'metal. y i

This' inventio has utility when incorporated in a transformer housing terminal,

U with a plurality of flexible extensions therefrom in providing additional terminals.

Referrng to the drawings:

Fig. 1 is a perspective vew of an embodiment of the invention;

Fig. 2 is a fragmentary plan view, with the cover removed, of the housing of Fig. 1, portions being broken away;

Fig. 3 is a longitudinal section through the housing of Fig. 1; r e

Fig. 4 is a side elevation of the housing of F ig. 1, showing extension terminals assembled therefrom; and

Fig. 5 is a wiring diagram.

Housing 1 as herein adopted is preferably of a non-magnetic metal as aluminun. This housing or box 1 has top plate or cover 2 of magnetic material as iron having in transverse slots 3 thereof filling 4 of non-magnetic material as aluminum. There is accordingly thus completed the housing. Electric current supply line 5, say for alternating current of 110 volts extends to the housing. Externally of the housing there is mounted switch 6 in association with fuse 7 carried by insulator block 8. Inside this housing 1 is core device of laminations of sheet iron having central pole 9 and terminal poles 10. This core member is insulated from the housin 1 by fiber board 11. Taps 12 in the undersi e of the cover plate 2 are in alignment with openings 13 in the bottom of the housing 1 so that stud bolts 14 may be engaged with the top 2 and nuts 15 be effective for thereby drawing the top 2 into fiush position with the housing and into direct contact with the

pole pieces

9, 10. As thus assembled, cover nuts 15' as legs or feet may be applied to conceal these nuts 15.

Central pole 9'carries primary winding 16 of many coils of fine wire in the instance when 110 volts alternating current 60 cycle is used, and'secondary winding 17 of a few turns of coarse wire. There is thus provided a transformer. The secondary may be to no purpose in the instance the tool is to be used as a demagnetizer, wherein the material to be thus treated may be shifted along the top 2 from end to end to clear such top, while the alternating current is creating pulsating magnetic fields.

The primary winding 16 is connected to the supply line 5. The secondary windin 17 is provided with extension IBbranche to provide

terminals

19, 20. The terminal 19 is shown as a threaded stem anchored with the top plate 2. The terminal 20 is an internally threaded socket having insulation 21 from the housing 1.

Flexible extension 22 may have screw thread stem 23 engaging the socket terminal 20 in thereby providing conductor connection to spring clamp terminal 24 thus permitting such connection to be made away from the housing l The secondary windin g 17 may have its other extension 25 therefrom connected to terminal 26 as an internally threaded socket to receive externally thread- 'ed connection 23 of flexible extension 27 to hand piece 28 having thread connection for mounting terminal 29, herein shown as a metallic point say of copper.

In the use of this terminal, relatively low voltage may be adopted, and with the current completed through work 30, as placed upon the plate 2, there may be direct mar-king on such work by the action of such low voltage relatively high ampere current, effecting arcing out of impurities in the material in the line of travel of the point in the writing operation. This writing operation is more satisfactorily accomplished by very light touch. If there be a more firm bearng down, .the connection is a really good conducting short circuit and does not give the marking I efl'ect on the metal. The materials as marked hereunder may be iron or steel or other metals. The more impure the specimen and greater electrical resistance the material has, the more easy the marking. -Successful marking is obtained even on copper and aluminun.

Line 31 from the terminal 20 extends to supplemental

secondary windings

32, 33, on the terminal poles'lO of the laminated core structure. From these

windings

32, 33, of the secondary winding, extends connection 34 to terminal 35 as an internally threaded socket, insulated from the housing 1. These' additional second windings tend to reduce the amperes, but increase the voltage for the secondary winding, 32, 33, in the instance that the externally threaded fitting 23 is assenbled in the terminal 35 instead of the terminal 26. With such higher voltage, the handle 28 may be used with a higher resistance terminal. To'this end, extension 36 is provided for thread assemhly with the handle 28. This fitting 36 is provided with an eye having set screw 37 for clamping therein carbon electrode. 38. Accordingly, in this assemblv, the carbon electrode may be used for marking on work 30 as on the housing. or work 39 as engaged by the terminal 24. Furthermore. there may be performed such cutting, soldering and light annealing operations as may be found desirahle or even to filling in places on work or castings.

There is accordingly provided under the disclosure herein, a simple compact tool including a transformer housing in a demagnetizer case, whichsdemagnetizer may be a terminal or merely the housing and that from such there may be the supplemental terminals for one or both of the terminals of the .secondary as in Simpler form or for the secondary as supplemental for the higher voltage.

It is to be understood the marker is more satisfactorily effective when the pencil is of dissimilar substance from the Work. If the pencil be of less resistance than the work, the marking line -may be more fine and clear.

With 110 volt, 60 cycle current, the prinary winding and transformer may conveniently be of say 550 turns of No. 20 wire, and the secondary coils be of say 8 or 9 turns of No. 6 wire.

What is claimed and it is desired to secure by Letters Patent is:

1. transformer housing having a conductor face, a transformer therein having primary and secondary windings, electric current supply connections to the transformer, a branched connection at one side of the transformer from the secondary winding extending as to one branch thereof to the housing conductor face, and a flexible extension from the other branch thereof having a terminal for connection away from the ho'sing. p

2. A transformer housing having a conductor face, a transformer therein having primary and secondary windings, electric current supply connections to the transform- `er, a branched connection at one side of the transformer from the' secondary winding extending as to one branch thereof to the housing conductor face, and a flexible extension from the other branch thereof having a terminal for connection away from the housing, said secondary winding having a second terminal insulated from the housing, and a second flexible extension from the second terminel.

3. A transformer housing having a. conductor face, a. transformer therein having primary and secondary windings, electric current supply connections to the transfoi'mer, a branched connection at one' side of the transformer from the seoondary winding extending as to one branch thereof to the housing conductor face, and a flexible extension from the other branch thereof having a terminal for connection away from the housing, said secondary winding having second and third terminals insulated from the housing, and a second flexible extension selectivel-y connectible to said nsulated terminals.

4. A transformer housing having a conductor face, a transformer therein having primary and secondary windings, electric current supply connections to the transformer, a branched connection at one side of the transformer from the secondary winding extending as to one branch thereof to the housing conductor face, said secondary winding having second and third terminals insulated from the housing, one of said insulated terminals being from the other branch of said connection, and a flexible extension selectively connectible to said insulated terminals.

In witness whereof I aflix my signature.

ROBERT L. HINDS.