US1578562A - Pole-piece-finishing machine - Google Patents

Description

March 30 1926.

C. C. TALEEN POLE PIECE FNISHING MACHINE Filed NOV. 8, 1920 2 Sheets-Sheet 1 TfmaMY/Vfrp A TTORNEY.

C. C. TALEEN POLE PIECE FINISHING MACHINE March 30 1926.

' Filed Nov. s, 1920 2 Sheets-Sheet 2 INVENTOR. C c\\^\/ @Neva/ A TTORNEY.

Patented Mar. 30, 1926.

UNITED STATES 1,578,562 PATENT OFFICE.

CARL C. TALEEN, OF DETROIT, MICHIGAN, ASSIGNOR TO VIILLIAM J. HAR'I'IG?,r Olli DETROIT, MICHIGAN.

POLE-PIIECE-FINISHING MACHINE.

Application `led November 8,1920. Serial No. 422,720.

To all whom t may concern:

Be it known that I,..CARL C. TALrinN, a citizen of the United States, and residing at Detroit, in the county of` W'ayne and State of Michigan, have invented a new and Improved Pole-Piece-Finishing AMachine, of which the following is a specification.

This invention relates to machines equipped with electrofmagnetic devices 'for holding irregular bodies through magnetic attraction instead of by means of the jaws usually employed in mechanical chucks, and its object is to provide a machine of this character for rotatably supporting thekpolepieces of electric machines and other devices i of irregular shape, particularly those which have concave sides which may be placed against the holder so that the other faces of the work may be accessible to the workman.

This invention comprises a holder'in the 'form of a cylindrical body and an electromagnet within the body, means being provided for supplying current to the coil. when the holder is to be rendered active to hold the work and to interrupt the current when the work is to be released, other means being provided to rotatably support the work holder.

It further consists in the details of construction illustrated in the accompanying drawings and particularly pointed out in the claims.

In the drawings, Fig. 1 is an elevation of my improved machine. y Fig. 2 is a plan of the magnetic work holder. Figs. 3 and 4 are sections on the lines 3-3 and 4 4 of Fig. 2. Fig. 5 is a perspective of a field core for electric machines. y

Similar reference characters refer to like parts throughout the several views.

In Fig. 1 I have shown a frame 1 supporting a table 2 and secured to a base or floor 3. A constantly rotating line shaft 4 carries a friction wheel 5 on which rests a disk 6 secured to the lower end of the shaft 7, ro-

A wire 18 extends from the4 extends from the current source to the base of a switch 22 having` a contact 23,.and a wire 24 extends from the contact 25 to the bracket 15. When the switch is closed, preferably by the foot of the operator,'the rings 1,12 and 13 are 1n circuit.

Secured to the upper end of the spindle 9 is a work holder comprising a short cylinder 28 of any desired metal to which the disks 29 are secured, preferably by screws 30. These disks might be integral with the body 28 but it is more'c'onvenient to make them separate as it permits the deep groove 32 to be cut longitudinally of the body to admit the iron core 33 and coil 34, which are held in position `by the screws 35 and the spacing ring 36, preferably of brass, which is pressed down into the groove v32 above they coil and around the upper end of the core.

The lead wires v37 and 38 connect the coil to the rings 12 and 13. A pin 39may be mounted in the core in alinement with the spindle. i

In Fig. 5 I have shown a pole piece or core 40 for the field magnets of small electric motors and generators. pieces are rolled in long bars to correct size and are then sawedV 0H to length and the holes 41 are drilled and threaded. Sawing 0E these pieces leaves sharp edges which may injure the pole windings and the hands of the workmen. The concave faces 42 curve to a cylinder slightly larger than the armature of the electric machine to which such pole pieces belong and the work holder is of the same curvature as the faces 42. .The body 28 is formed with a narrow groove 43 to receive the guide strip 44 which serves to position the pole pieces. Y

The spindle 9 is set rotating and the operator drops a pole piece onto the holder 28 so that the pin 39 enters the hole 41 thereof. The guide strip 44 immediately positions the pole piece on the body 28 and the operator closes the switch 22 which causes the core 33 to he energized to hold the work in position. rlhevoperator then holds a file so that the sharp edges and fins at the ends of the work will contact with the file as the work helder rotates, which results in these corners being quickly slightly rounded. The operator then releases the switch, which results in the electro-magnet being denergized and he then pushes the pole piece off the holder with his file.

These pole It has been found that during such Work the file finally cuts into the holder at certain definite points and I therefore mill out l grooves in the ends of the body 28 to receive r4the inserts 4G Which are positioned by doWelpins 47, end plates 29 and screws 30. These inserts are preferably of hard steel and save the holder' from being disfigured.

The details and proportions of the various parts may all be modified by those skilled in the art Without departing from the spirit of my invention as set forth in the following claims.

I claim:-

l. A holder for irregular Work consisting of a cylindrical body having a diametrical recess, a core Within the recess with its sides parallel to a diameter of the cylinder, and

a ring surrounding the outer end of the core and having its outer end conforming to the cylindrical surface of the body, and a pin extending radially from said core to posi tion the Work on the body.

3. A holder for irregular Work consisting of a cylindrical body having a diametrical recess, a core Within the recess with its sides parallel to a diameter of the cylinder and having one end terminating in the cylindrical surface of the body, a coil on said core, a ring surrounding the outer end of the core and having its outer end conforming to the cylindrical surface of the body, and a pin extending radially from said core to position the Work on the body comprising a strip extending parallel to the axis of said body from the cylindrical surface thereof adjacent said pin.

4. A holder for irregular Work comprising a body having a convex surface to receive the work and a recess within said curved area, a core Within said recess, a coil on said core Wit-hinsaid recess, anda ring filling said recess around said core and outside of said coil, the outer surfaces of the core vand ring conforming to the curvature of the surface of the body and a projection on said curved surface to position the Work.

5. A holder for irregular Work comprising a body having a convex curved surface to receive the Work and a recess Within said curved area, a core and a coil thereon Within said recess, the outer end ofthe core conforming to the curvature ofthe surface of the body at said recess and a projection on said curved surface to position the Work.

CARL C. TALEEN.

Images