US2446650A - Electrical scriber - Google Patents

Description

Aug. 1948- J. E. HAMMERS 2,446,65

ELECTRICAL SCRIBER Filed April 25, 1945 INVENTOR. 5/4/7765 5 m)? flaw/72ers Patented Aug. 10, 1948 UNITED STATES PATENT OFFICE ELECTRICAL SCRIBER James Erwin Hammers, Aberdeen, S. Dak.

Application April 23, 1945, Serial No. 5893802 8 Claims. 1

This invention relates to electrical marking or scribing tools of the character usually employed to burn identifying indicia on metal, and the primary aim is to provide such a scriber wherein is employed a pair of electro-magnets at least one of which is bodily shiftable to periodically and automatically make and break the circuit within which the scriber is positioned.

Another important object of this invention is to provide an electric scriber or tool of the aforementioned character, wherein a continuous coil is employed with at least two cores of magnetizable material, and means disposed between the cores to permit movement of one of said cores to and from a position where the point of the scriber is in contact with the metal being marked.

Another important aim of this invention is to provide an electric scribing instrument having as an important portion thereof, means for yieldably maintaining a pair of electro-magnets in predetermined relation with respect to each other and so mounted as to cause at least one of the electro-magnets to move an associated workengaging point so that the circuit is periodically made and broken and an are produced to melt the material bein acted upon.

Other aims of the instant invention include the specific manner of forming the electro-magnets; the way in which one of said electro-magnets is housed within a member resenting a convenient grip; the form of a portion of the coil; the specific manner of removably affixing the work-engaging point in place so that it may be renewed from time-to-time; and the expedient of employing a portion of the .continuous coil to form the resilient means between the cores of the electro-magnets for yieldably holding the cores in spaced, aligned relation.

Other objects of the invention will appear during the course of the following specification, referring to the accompanying drawing, wherein:

Fig. 1 is a perspective view of an electric scriber made in accordance with the present invention, and illustrating the same in use.

Fig. 2 is a central longitudinal sectional view through the scribe-r per se, illustrating the relation of the two electro-magnets.

Fig. 3 is a transverse cross sectional view taken on line III-III of Fig. 2.

Fig. 4 is a diagrammatical view illustrating the continuous coil and the two cores in aligned relation and the way in which the work-engaging point is a continuation of the coil.

Fig. 5 is a fragmentary side elevational View of a portion of an electric scriber made in accordance with a modified form of the invention; and

Fig. 6 is a side elevational view of a removable work-engaging point, adapted to be threaded onto the specially formed coil.

Instruments of the character illustrated are conventionally employed by workmen to mark their tools and working equipment to prevent loss and for purpose of identification. Such instruments are also widely employed in marking articles of manufacture, such as metal plates It), and when the marking occurs, the scriber is positioned within an electrical circuit including a source of power, such as a battery or the like l2.

One side of the battery I2 is connected to Work ill by a removable clip l4, through the employment of a conductor I6. The other side of the battery I2 is connected to the hereinafter de scribed coil by a conductor H3.

The coil which is employed, is continuous from end-to-end and divided into two portions designated by the numerals 20 and 22 respectively. Portion 20 circumscribes a core 24 of magnetizable material, such as iron or the like, while portion 22 circumscribes a core 26, which is of like substance.

These two cores 24 and 26 are in aligned relation and spaced apart. The core 24 and its circumscribing coil portion 20 is usually confined within a housing 28 that is a suitable grip for the hand 30 of the operator. Portion 22 of the continuous coil is substantially conical in form and the base of the body thereof is adjacent to core 24. Core 26 is near the apex of portion 22 and in the form of the invention illustrated in Figs. 1 and 2, the work-engaging point 32 is integral with core 26. This core 26 is provided with external threads capable of mating with the convolutions of portion 22, and therefore, quick detachment for renewin point 32is possible.

In the form of the invention illustrated, an intermediate portion of the continuous coil and which is in reality the base of coil portion 22-, serves as a means for yieldably maintaining cores 24 and 26 in spaced relation. The inherent resiliency of the material from which portion 22 is made will hold the cores in the position shown in Figs. 1, 2 and 4.

The head 34 of core 24 substantially closes the bore 35 through housing 28 but notch 38 in head 34 allows passage of the wire from coil 20 to coil 22.

Conductor I8 is connected .to one end of the material from which the coils are produced as at 42.

Figs. 5 and 6 illustrate a modified form of the invention in that Work-engaging point IE8 is integral with a coiled. substantially conical body I02. The coils of this body .102 mate with the 3 coils of portion 22, and as illustrated in Fig. 5, the body 12 may be fastened to portion 22 by turning body H12 in the conventional manner.

In the operation of the instrument, and when the same is in a circuit as illustrated in Fig. 1, the operator merely touches point 32 to work I!) to close the circuit. When suchis done, the current passes and energizes coils 2fl-and 22. Such energization will cause an attraction between cores 26 and 24 and point 32 will be withdrawn from contact with work 10. Such withdrawal will cause an arcing and a burning of the material from which article I is made. Thisaction is continuous for the resiliency of a portion of coil 22 is sufficient to force point 32 backrtowardwork It) as soon as the current is broken by the lifting of point 32. Pulsation will continue as just described, and any mark may be placed upon work 10.

Itis understood that modifications in the specific construction of electric scribes embodying my invention may be made without departing from the spirit thereof or the scope of the-appended-claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. An electric scriber of the character'described comprising-a pair of aligned, spaced apart cores of magnetizable material; a coil tightly wound around' both cores and having means for connection at one end to a source of electrical energy;

and awork-engaging point in electrical connection with the other end of the coil and movable with one of the cores and a portion of the coil toward and from the other core.

'2. An-electric scriber of the character described comprising a pair of aligned, spaced apart cores of magnetizable material; a coil tightly wound around both cores and having means for connection at one end to a source of electrical ener y; and a work-engaging point in electrical connection with the other end of the coil and movable with one of the cores and a portion of the coil toward and from the other core, a portion of said coil bridging the space betweensaid cores and serving as means for yieldably maintaining the cores in spaced apart relation, the core having the point movable therewith being appreciably smaller than the other core).

3; -An electric scriber of the character described comprising a pair of aligned, spacedapart cores of magnetizable material; a coil tightly wound around both cores and having means for connection at one end to a source of electrical energy; and a work-engaging point in electrical connection with the other end of the coil and movable with one of the cores and a portion" of the coil toward and from the other core, a portion of said coil bridging the space between said cores and serving as means for yieldably maintaining the cores inspaced apart relation, the portion of thecoil bridging the space'betwee-n said cores and circiunscribing the core having the point movable therewith being substantially conical withtheapex thereof at the end of the coil.

4. An electric scriber of the character described comprising a pair of aligned, spaced apart cores of niagnetizable material; a coil tightly wound around both cores and having means for connection at one end to a source of electrical energy; and a work-engaging point in electrical connection with the other end of the coil andmovable with one of the cores and a portion of the coil toward and from the other core, a portion of said 4 coil bridging the space between said cores and serving as means for yieldably maintaining the cores in spaced apart relation, one of said cores and the portion of the coil circumscribing the same being provided with a housing serving as a grip for the operator of the scriber.

5. An electric scriber of the character described comprising a pair of aligned, spaced apart cores of magnetizable material; a coil tightly Wound around both cores and having means for connection at one end to a source of electrical energy; and a work-engaging point in electrical connection with the other end of the coil and movable with one of the cores and a portion of the coil toward and from the other core, one of the cores having screwthreads formed thereon adapted to engage the convolutions of the coil at one end thereof adjacent the work-engaging point.

6. An electric scriber of the character described comprising a pair of aligned, spaced apart cores of magnetizable material; a coil tightly wound around both cores and having means for connection at one end to a source of electrical energy; and a work-engaging point in electrical connection with the other end of the coil and movable with one of the cores and a portion of the coil toward and from the other core, said workengaging point being a straight portion'of the wire from which the coil is made.

'7. An electric scriber of the character described comprising a pair of aligned, spaced apart cores of magnetizable material; a coil tightly wound around both cores and having means for connection at one end to a source of electrical energy; and a work-engaging point in electrical connection with the other end of the coil and movable with one of the cores and a portion of the coil toward and from the other core, said work-engaging point having a straight portion and a coiled portion adapted for screwthreaded engagement with that part ofthe first mentioned coil circumscribing the said one core with which the point is movable.

8. An electric scriber of the character described comprising a pair of aligned, spaced apart cores of magnetizable material; a coil tightly wound around both cores and having means for connection at one end to a source of electrical energy; and a work-engaging point in electrical connection with the other end of the coiland movable with oneof the cores and a portion of the coil toward and from the other core, a portion of said coil bridging the space between said cores and JAMES ERWIN' HAMMERS.

REFERENCES CITED The following references-are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,350,734 Overline Aug. 24, 1920 2,129,899 Young Sept. 13, 1 938

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