US3186098A - Center mark transferring device - Google Patents

Description

June 1, 1965 P. J. FLECK CENTER MARK TRANSFERRING DEVICE Filed Sept. 20, 1963 INVENTOR.

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3,186,08 CENTER MARK TRANSFERRDIG DEVICE Peter J. Fleck, 921 NE. 17th St, Auburn, Wash. Filed Sept. 20, 1963, Ser. No. 310,364 4 Claims. (Cl. 33-189) My invention relates to a center mark transferring device.

to provide a simple and eiiiclent device which can be used to transfer a center mark on one part or piece to a corresponding position on another part or piece.

Anotherobject is to provide a center mark transferring device which is well adapted for multiple use and which of points or centers which have already been established, marked or laid out on a first part or piece.

' Another object is to ring device which is particularly well adapted for use in layer being permanently magnetized, said two layers having a continuous passageway extending entirely through them perpendicularly to their fiat end surfaces, and said marked on another Like reference numerals refer to like parts throughout the several views.

The 1, 2 a

Edbfifi I. Patented June 1, i965 and cooperate in forming a passageway which extends entirely through the device between the two flat sides or a position in which the tip 22 thereof protrudes beyond the plane of the magnet end 15 so that said tip 22 can readily be positioned in a punch mark 28. When the device is thus positioned the pull of the magnet 13 will draw the device firmly down onto the member 25, which is of magnetic material, and will cause the upper conical point 21 of the pin 20 to protrude above the plane of the surface 11. After one of the center mark transferring devices has been correctly positioned over each marked center 28 of the mold member 25 the other mold member 26, guided on the posts 27, is pressed against the points 21 of the pins 20 with enough force to mark on the member 26 a set of centers which are accurately aligned with, and correspond in relative positioning and spacing to, the marks 28 on the member 25. The force exerted by the magnet 13 helps to properly seat the end 22 of the pin 20 in a conical punch mark 28 and by so doing properly aligns the axis of the pin 20 with the punch mark and holds the device against displacement on the member 25 so that an accurately aligned mark can be made on the other mold member 26. All pins 20 are of accurately standardized length.

Obviously the use of my device is not confined to mold members but it can be used in many other instances to transfer center marks from one piece to another.

In the modified form of my invention shown in FIG. 4 the magnet 35 is not an inserted part but is a fiat plate rigidly attached to another flat plate 36 of nonmagnetic material. The two plates 35 and 36 have two opposed parallel flat surfaces 37 and 38 respectively and have a passageway 39 extending therethrough perpendicular to the flat end surfaces 37 and 38. The passageway 39 receives and supports a centering pin 20 identical with the centering pin shown in FIGS. 1 to 3. The centering device shown in FIG. 4 is used in the same manner as the centering device shown in FIGS. 1 to 3.

In the modified form of my invention shown in FIG. the main body member and limit pin 24 are the same as those shown in FIGS. 1, 2 and 3. An inserted magnet 13 in said member 10 has a bore 17 which is coaxial with but of substantially larger diameter than the bore 16 in the main body member 10. A centering pin 40 of magnetizable material having a conically pointed upper end 41 and having a side notch 42 to receive the end portion of the limit pin 24 is longitudinally movably disposed in the bore 16. The lower end of the centering pin 40 is enlarged to form a head 43 of suitable diameter to fit closely but movably in the enlarged bore 17 of the magnet 13. The head 43 terminates in a symmetrical lower end portion 44 of conical shape and this end portion 44 is normally caused by magnetic force to protrude from the lower end of the magnet 13'. When the device of FIG. 5 is positioned over a hole 45 in a member 46 of magnetizable material the conical part 44 of the head 43 will be centered in said hole 45 and a mark coincident with the axis of the hole 45 can be made on any piece of material which is pressed against the conical tip 41 of the pin 40. Obviously if there are a plurality of holes in the member 46 and one of my center marking devices is used in connection with each of said holes, then centers truly aligned with the axes of all of said holes can be simultaneously marked on another member by pressing it against the points 41 of centering pins 40.

The foregoing description and accompanying drawings clearly disclose preferred embodiments of my invention but it will be understood that changes may be made within the scope of the following claims.

I claim:

1. A center mark transferring device comprising a member formed at least partly of permanently magnetized material, said member having two substantially parallel spaced apart fiat faces and having a straight tubular passageway perpendicular to said flat faces and extending between said flat faces, the magnetic force of said permanently magnetized material being of maximum strength at one of said fiat faces; and a centering pin of magnetizable material longitudinally movably supported and guided in said passageway, said centering pin having two coaxial conically pointed ends and the over-all length of said centering pin being greater than the thickness of said member between said two flat faces, said pin being urged by the magnetic force of said permanently magnetized material into a position in which a pointed end of the pin protrudes beyond the flat face at which the magnetic force is of maximum strength.

2. A center mark transferring device comprising a layer of non-magnetic material of substantial thickness; a layer of permanently magnetized material of substantial thickness rigid with said non-magnetic layer, said two layers having two opposed spaced apart fiat faces and having a straight tubular passageway perpendicular to the fiat face of said layer of permanently magnetized material and extending through said two layers of material between said flat faces; and a centering pin of magnetizable material longitudinally movably supported in said passageway, said centering pin having two coaxial pointed ends and the over-all length of said centering pin being at least slightly greater than the thickness of said two layers of material between said two flat faces and said magnetized layer normally urging said pin into a position in which a pointed end of the pin protrudes beyond the plane of said fiat face of said magnetized layer. 3. The apparatus as claimed in claim 2 in which devices rigid with one of said layers of material are positioned to engage with and limit longitudinal movement of said centering pin.

4. A center mark transferring device comprising a body member of non-magnetic material having two parallel fiat ends and having a recess extending from one end thereof inwardly and an opening of smaller diameter than said recess extending from the bottom of said recess to the other end thereof; an insert of magnetized material disposed within said recess and rigid with said body member, said insert having a flat face positioned a short distance outwardly from the plane of the adjacent flat end of the body member, said insert having therein an opening registering with the opening in said body member and cooperating with said opening in said body member in forming a continuous straight passageway extending entirely through the body member and insert; and a centering pin of magnetizable material supported and guided in said passageway for longitudinal movement, said centering pin having two coaxial pointed ends and the over-all length of said centering pin being greater than the over-all thickness of the body member and insert, whereby one pointed end of the centering pin can protrude beyond the fiat face of the insert and the other pointed end of the centering pin can protrude beyond the flat end of the body member remote from the insert.

References Cited by the Examiner UNITED STATES PATENTS 1,914,569 6/33 Janiszewski 33-191 X 2,147,511 2/39 Anton 33-191 2,686,371 8/54 Flis 317-159 X 2,718,708 9/55 Kalberer 33-189 2,731,729 1/56 Tomaska 33-189 2,861,484 11/58 Rance 33-189 X 3,068,573 12/62 Sidwell.

FOREIGN PATENTS 923,090 2/55 Germany. 642,813 9/50 Great Britain.

ISAAC LISANN, Primary Examiner.

Claims (1)

1. A CENTER MARK TRANSFERRING DEVICE COMPRISING A MEMBER FORMED AT LEAST PARTLY OF PERMANENTLY MAGNETIZED MATERIAL, SAID MEMBER HAVING TWO SUBSTANTIALLY PARALLEL SPACED APART FLAT FACES AND HAVING A STRAIGHT TUBULAR PASSAGEWAY PERPENDICULAR TO SAID FLAT FACES AND EXTENDING BETWEEN SAID FLAT FACES, THE MAGNETIC FORCE OF SAID PERMANENTLY MAGNETIZED MATERIAL BEING OF MAXIMUM STRENGTH AT ONE OF SAID FLAT FACES; AND A CENTERING PIN OF MAGNETIZABLE MATERIAL LONGITUDINALLY MOVABLY SUPPORTED AND GUIDED IN SAID PASSAGEWAY, SAID CENTERING PIN HAVING TWO COAXIAL CONICALLY POINTED ENDS AND THE OVER-ALL LENGTH OF SAID CENTERING PIN BEING GREATER THAN THE THICKNESS OF SAID MEMBER BETWEEN SAID TWO FLAT FACES, SAID PIN BEING URGED BY THE MAGNETIC FORCE OF SAID PERMANENTLY MAGNETIZED MATERIAL INTO A POSITION IN WHICH A POINTED END OF THE PIN PROTRUDES BEYOND THE FLAT FACE AT WHICH THE MAGNETIC FORCE IS OF MAXIMUM STRENGTH.

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