US 2083168 A
Description (OCR text may contain errors)
June 8, 1937. E. LARSON ELECTRIC FORGING HAMMER Filed Deb. 26, 1935 3 Sheets-Sheet l Invenlor E. Zea/J0 A Hamel) June 8, 1937. LARSON 2,083,18 ELECTRIC FORGING HAMMER I I Filed Dec. 26, 1955 a Sheets-Sheet 2 l I l A ilomey June 8, 1937. E, L RS 2,083,168
ELECTRIC FORGI NG HAMMER Filed Dec. 26, 1935 3 Sheets-Sheet 3 Inventor A llorney Patentedlune 8, 1937 UNlTED sTArss ELECTRIC FORGING HAMMER Edward Larson, Austin, Nev., assignor of onefourth to H. F. Connelly, one-fourth to William East, and one-fourth to J. B. Sibbald,
Application December 26, 1935, Serial No. 56,275
My invention relates generally to electric hammer means, and particularly to an electric-magnetically operated forging hammer, and an important object of the invention is to provide a simple, rugged, and efficient device of this character which can be produced and operated at relatively low cost.
Another important object of the invention is to provide a mechanically efficient arrangement of the character indicated above in which the parts are easily accessible for repair or replacement.
Other important objects of my invention will be apparent from a reading of the following description in connection with the drawings, wherein for purposes of illustration I have shown a preferred embodiment of my invention.
In the drawings:-
Figure 1 is a general diagrammatic representa tion of the electric wiring and connections of the embodiment.
Figure 2 is a side elevational View of the embodiment.
Figure 3 is a transverse vertical sectional view taken through Figure 2 and looking from left to right.
Figure 4 is a side elevational view of the tube and its supports and flanges.
Figure 5 is a side elevational view of the piston or core and the hammer.
Figure 6 is a transverse vertical sectional view taken through the core.
Figure 7 is a transverse vertical sectional View taken through the hammer.
Figure 8 is a plan view of the manual operating lever or switch.
Referring in detail to the drawings, the letter A generally designates the upper coil and the letter B the lower coil of the piston operating 40 assembly. For six to eight volts operation these coils are wound with No, 10 gauge wire. These coils are wound on a brass hollow cylinder I in which works the piston or core 4 which is made preferably of steel tubing and has screwed into its opposite ends the solid magnetically permeable heads 2 and 3.
The lower end 3 is axially threaded to receive the upper end of the piston rod 5 whereby the piston is operatively connected to the piston 4.
59 The rod 5 is preferably of steel and has its lower end threaded as indicated in the top of the hammer 6 which is or" steel.
The hammer operates in conjunction with the anvil l which is preferably a steel block and 55 has wound thereon the coil C which is wound to give anvil l the same magnetic effect as the hammer 6, so as to make the anvil neutral so that the magnetized hammer will not stick to it. The coil C is a tandem wound coil and comes into action at the same time that the coil A. 5
The numeral 9 generally designates a manually operating lever or switch lever which is pivotally mounted as indicated by the numeral 9 to a suitable support.
The numeral ill designates the contact point 10 which is connected to the wire 15 which leads to the inside winding of the coil A, and this contact is also connected to the wire I! which leads to the coil C.
The numeral H designates the contact point 15 which is connected to the wire it which leads to the inside winding of the coil C.
The numerals l2 and i2 designate the contact points on the lever 9 which engage respectively the contact points 10 and H. 20
The wire 14 leads from the contact l2, l2 to the negative post on an energizing battery such as a storage battery. The wire l3 leads from the two outside windings oi the coils A and B to the positive post on the battery, while the 25 wire it leads from the coil C to the wire 13.
Referring particularly to Figure i, there istherein shown. the brass cylinder 1 with the brass flanges 20, 2| and 22, the flanges 25] and 22 acting as brackets to fasten the coils to the 30 support 23 as shown in Figure 2 and the brass flange 2i acting as a separator between the coils A and C.
To operate the device of the invention, the lever 9 is raised so as to bring the contact points I2 and [0 into contact so as to cause electric current to flow from the battery through the coils A and C, thereby making the anvil neutral to the hammer and causing a strong magnetic attraction in the coil A, so as to cause the piston to be drawn upwardly into a position in which the upper end of the core or piston is above the tube. By moving the lever downwardly so as to engage the contact i2 with the contact H, elec tric current is caused to flow from the battery through the coil B. which causes a strong magnetic attraction, following the lapse of the attraction in the cell A, so that the piston is drawn downwardly so that the hammer is forced downwardly with a striking blow toward the anvil. These operations can be performed almost as quickly as a person can manipulate the lever 9 up and down by hand.
Although I have shown and described herein a preferred embodiment of my invention, it is to be with said hammer head, an electrical winding surrounding said anvil, a source of electrical supply, a switch, said source of electrical supply and said switch being included in circuit with the windings of the solenoids for selectively energizing said windings for effecting a reciprocating movement of said armature, and said Winding of the anvil being connected in circuit with said source of supply and said switch and adapted to be energized simultaneously with the energiza- 10 tion of one of the windings of the solenoids.