US2390339A - Magnetic hand tool - Google Patents

Description

Dec. 4, 1945. R. ULLMAN ETAL MAGNETIC HAND TOOL Filed May 9, 1945 INVENTORS Robert U/lman {Fred Emu/4e! ATT REY Patented Dec. 4, 1945 MAGNETIC HAND 'rooL Robertv Ullman, New York, N. Y., and. Fred. Brauner, Laurelton, N. .L; said, Brauner assignor to said Ullman Application Mays, 1945, Serial-No. 592,892

3 Claims.

The present invention relates to magnetic hand tools, and, more particularly, to permanentlymagnetized hand tools especially adapted for-use in removing shavings and chips from screw threads andthe like.

lt is an-object of the present inventiontoprovide hand tools-of. the character described which are ofstrong; permanent magnetic character.

It isalso an object of the present invention to provide tools of the character described in which the operative portion of the tool is not permanently magnetized and may, therefore, he formed of strong, non-brittle, durable tool steel or the like.

It is another object of the present invention to provide hand tools of the character described which exert a maximum of magnetic force through the operating end thereof.

It is a further object of the present invention to provide hand tools of the character described which may be readily adapted for use in removing iron and steel shavings from screw threads, either internal or external, or from other narrow spaces, grooves or crannies that are difficult of access, such as from the spaces between rails on a railroad track, or the like.

It is a still further object of the present invention to provide permanently magnetized hand tools of the character described which are of simple construction, economical to produce, are positive in action and easy and convenient to manipulate and use and which possess many other superiorities and advantages, some of which will hereinafter be more fully set forth and others of which will become readily clear from the accompanying drawing and the description following.

In the making of screw threads upon iron and steel objects, a certain amount of shavings or chips inevitably remain in the thread grooves formed which have to be removed before the threads may be used. These shavings are generally covered with oil from the oil used on the threading tools and, therefore, adhere to the thread surfaces. They are, therefore, diflicult to remove. The methods for removing such shavings, as heretofore used, such as brushing or compressed air, have not been found completely satisfactory and efllcient; the latter comprising a source of danger to the operators eyes.

To overcome the foregoing difficulties and to make possible rapid, complete and effective removal of shavings and chips from screw threads, We have devised a new and novel magnetic hand tool capable of entering into the thread grooves and removing the shavings. therefrom by mag netic attraction.

Generally stated, such-tool comprises a handleenclosed permanent magnet and a non-magnet ized tool member secured to such handle and provided. with a sharp end capable of wiping screw-thread grooves or entering into other, similar narrow spaces difficult of access. A maximum of magnetic iiux is provided through the tool portion by means of a steel cap fitting. over apole end of the permanent magnet and engaging an end-of the tool to concentrate and direct all of the lines of magnetic force through the tool, thereby providing the tool with a maximum of magnetic force and a maximum of magnetic operating efliciency.

One embodiment of a tool of the present invention is shown in the accompanying drawing. It is to be understood, however, that such embodiment is shown byway of illustration only, to make the principles and practice of the present invention more readily comprehensible, and is not intended in any way to limit the invention to the specific details of construction shown.

In the drawing:

Fig. l is a, view in elevation and partly in section of one embodiment of a permanently magnetized hand tool of the present invention as particularly adapted for the removal of shavings or chips from screw threads or from othernarrow spaces difficult of access; and

Fig. 2 is an end view of the same, viewed from the tool end thereof.

Referring more specifically to the accompanying drawing, the hand tool of the present invention may comprise a handle portion consisting of an outer shell or casing H], of a non-magnetic material, such as a plastic material or wood or a non-magnetic metal, as aluminum, copper, or the like. The 'shell I0 is open at one end and has snugly fitted therein the permanent magnet I l, which may be made of any of the suitable high magnetic alloys conventionally used for the purpose.

The relative dimensions of the shell or casing it! and permanent magnet II are such that a polar end of the magnet ll projects from the casing and its surface is exposed to receive directly thereon and to hold frictionally and tightly thereon the cap I2, which may be formed of any good magnetic flux conducting metal, such as carbon steel.

The cap I2 is provided, on its roof portion, with an opening I3 into which may be set one end of an operative tool element, such as the rod l4.

Such rod may be formed of any suitable magnetic conductor material, such as steel, and may be firmly connected to the handle and held in position thereon by the cap l2, as by means of the reduced end l5, fitting into the opening I3 and riveted against the interior edges of such opening, as at l6.

To form the shaving removing tool of the present invention, the free end of the rod I4 may be offset sideways, as at H, and the ofiset end provided with a knife edge or point 18 adapted to fit in a groove or lot to contact the shavings or chips that may be present therein. The size of the offset I! may be modified to conform to the width of the threaded opening, when intended for use on internal threads so as to permit its insertion within the threaded opening and to have its edge IB wiped against the grooved walls thereof.

It will be readily apparent to those skilled in the art that by the present invention we provide a hand tool which is permanently magnetized and which has, nevertheless a non-magnetized, nonbrittle, magnetism conducting steel tool portion which exerts a maximum of magnetic force by reason of the concentration therethrough of substantially the entire magnetic flux of the permanently magnetized handle, through the medium of the cap connectin the tool to the handle.

It will also be readily apparent that the operative end of the tool portion of the hand tool of the present invention may be modified in size, shape and form to provide tools suitable for many and various purposes, as for the purpose of removing metal chips from the spaces between rails on railroad tracks, and the like.

Having thus completed the description of one embodiment of the hand tools of the present invention.

What we claim as our invention is:

1. A hand tool comprising a handle, including a permanently, magnetized metal core, a magnetism conducting cap frictionally engaging a pole end of the said magnetized metal core and a magnetism conducting t-ool member set into and retained by the said cap.

2. A hand tool comprising a, handle, including a permanently magnetized metal core, a nonmagnetic casing fitted about a portion of the said core leaving a pole end thereof exposed, a magnetism conducting cap frictionally engaging the said exposed pole end of the core and a magnetism conducting tool member set into and retained by the said cap.

3. A hand tool comprising a handle, including a. permanently magnetized metal core, a magnetism conducting cap frictionally engaging a pole end of the said magnetized metal core and fixedly retained thereon, a magnetism conducting metal rod set into and fixedly retained by the said cap, said rod having an offset free end, said free end provided with a knife edge adapted to be wiped within a thread groove.

ROBERT ULLMAN. FRED BRAUNER.

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