US2013758A - Punch set - Google Patents

Description

Sept. l0, 1935. c. o. LlvERMoRE PUNCH SET `2 sheets-sheet 2 Filed March 23, 1935 v orney Patented Sept. 19, 1935 PUNCH SET i Clarence 0. Liver more, Madison, Wis.

Application March 23, 1935, Serial No. 12,662

Claims.

The present invention relates to new and useful improvements in punch sets for use particularly in the manufacturing and repairing of radio receiving sets but it will be understood, of course,

5A that a punch set in accordance with the present invention may be used in any work for which it may be found adapted and desirable.

The primary object of the invention is to provide, in a manner as hereinafter set forth, a

punch set of the aforementioned character embodying a novel construction, combination and arrangement of parts through the medium of which various sizes of washers may be expeditiously cut from a blank.

Other objects of the invention are to provide a punch set of the character described which will be comparatively simple in construction, strong, durable, highly efficient and reliable in usa, compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study oi the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the severa-l views, and wherein:-

Figure l is a view in vertical section through a punch set constructed in accordance with the present invention.

Figure 2 is a view in vertical section, illustrating the rst step to be taken in forming a washer from a blank.

Figure 3 is a vertical sectional view, illustrating the second step to be taken.

Figure 4 is a vertical sectional view, illustrating the third step.

Figure 5 is a vertical sectional view, illustrating the assembly for cutting another size oi washer.

Figure 6 is a plan view of one of the units constituting a part of the set.

Figure 7 is a view in side elevation of the invention.

Figure 8 is a view in vertical section, showing a slightly modied form of set.

Figure 9 is a top plan View of the invention.

Referring now to the drawings in detail, it will be seen that the reference numeral I designates what will be hereinafter referred to as a base die upon which a plurality of reversible units 2, 3 and are removably mounted. The members I to inclusive, have formed therein centrally located vertical bores 5 for the reception of a pin E having a head l' on its upper end and terminating in a point 8 at its lower end.

The base die or unit I is further provided, in

its upper portion, with stepped recesses 9 providing annular cutting edges I@ of different diameters. On its ends, the unit 2 has formed thereon annular cutters I I and I2, also of different diameters. Between its bore 5 and the cutting edge I2, the unit 2 is further provided with a substantially conical portion I 3, the purpose of which will be presently set forth.

As illustrated to advantage in Figure 1 of the drawings, the unit 3 is provided, on its ends, with annular cutters Iii and I5 of diiierent diameters. The uppermost unit l is provided, on its lower end only, with an annular cutter I6. As also best seen in Figure l of the drawings, the elements I to 4, inclusive, when not in use are adapted for nesting engagement with each other, the head 'I of the pin 6 resting on the upper unit 4, the shank of said pin extending into the bores 5.

In use, the blank I'I is mounted on the base die or unit I (see Figure '2) and an indentation 201 is made in said blank by the point 3 of the pin S, said pin being struck with a hammer or other suitable tool. The blank il is then removed from the base die or unit I and the unit 2 is mounted on said oase die or unit, as shown in 25 Figure 3 of the drawings. The blank il is then positioned on the unit 2 with the indentation in said-blank aligned with the bores 5i of the unit 2 and the base die or unit I. The point 8 of the pin S is then engaged in the previously made indentation and said pin 5 is then driven through the blank in a manner to form the usual centrally located opening in the washer. The blank is then again mounted on the base die or unit I and the unit 2 is positioned on said blank (see Figure 4). The pin 6 is then inserted in the bores of the members l and 2, said pin passing through the opening which has been formed in the blank Il, the head l of said pin resting on the upper end of the unit 2. The head 'I of the pin 6 is then struck with a hammer or other tool in a manner to drive the unit 2 downwardly into the base die or unit I, thus cutting out the washer.

If a washer of smaller diameter is desired the hole in the blank is formed in the manner previously described. However, the unit 2 is inverted and mounted in the base die or unit I and the blank I'I is positioned on said unit 2, as clearly shown in Figure 5 of the drawings. The unit 3 50 is then positioned on the 'blank Il and the pin 6 is inserted, after which said pin is struck with a hammer or other tool for driving the unit 3 downwardly into the unit 2 in a manner to out out the washer. Should difficulty be experienced in removing the cut out washer from the unit 2, this may be facilitated by removing the blank l1 from which said washer has been struck and the unit 3 and then reinserting the pin the head l thereof resting on the washer. Then, by striking the head 'l with a hammer or other tool the washer will, by reason of the substantially conical or tapered portion I3 of the unit 2, be crimped or dished after which said washer may be conveniently removed. Of course, when a still smaller washer is desired the apertured blank is mounted on the unit 3 and the unit 4 functions to cut out the washer.

In Figure 8 of the drawings, the reference numeral I8 designates a base die or unit upon which removable units I9, 2B and 2| are adapted to be mounted. The members i8 to 2l, inclusive, are provided with bores 22 of uniform diameter, the unit I8 being further provided with stepped recesses 23. In the use of this modied form of the invention, the blank, in which the opening has been previously formed, is mounted between the desired members, according to the size washer desired, the pin 2li is inserted, and said pin is then struck with a hammer or other suitable tool for cutting the washer from the blank.

It is believed that the many advantages of a punch set constructed in accordance with the present invention will be readily understood, and

although preferred embodiments of the invention are as illustrated and described, it is to be understood that further modications and changes in the details of construction may be resorted to which will fall within the scope of the invention as claimed.

What is claimed ist- 1. A punching apparatus of the class described comprising a die and a cutting member having aligned bores therein and adapted to receive a blank therebetween, said die and cutting member including cooperatingcutting edges, said cutting member being provided with a reduced head portion and said die with a correspondingly shaped recess in the upper portion thereof whereby upon inverting said cutting member, the head is receivable in said recess, and a pin adapted to eX- tend through the blank and engageable in the bores for guiding the cutting member, said pin including a driving head engageable with said cutting member.

2. A punching apparatus of the class described comprising a die and a cutting member having aligned bores therein and adapted to receive a blank therebetween, said die and cutting member including cooperating cutting edges, said cutting member further having a substantially conical portion therein between the `cutting edge and the bore thereof, said cutting member being provided with a reduced head portion and said die with a correspondingly shaped recess inthe upper portion thereof whereby inverting said cutting member, the head is receivable in the recess, and a pin adapted to extend through the blank and engageable in the bores for guiding the cutting member, said pin including a head engageable with the cutting member for driving said cutting member through the blank, .said head being also cooperable with the substantially conical portion for bending the material cut from the blank.

3. A punchingr apparatus of the class described comprising a die and a cutting member having aligned bores therein and adapted to receive a 10 blank therebetween, said die and cutting member including annular cooperating cutting edges telescopically engageable with each other, the cutting member further having a substantially conical portion between the cutting edge and the bore thereof, said cutting member being provided with a reduced head portion and said die with a correspondingly shaped recess in the upper portion thereof, whereby upon inverting said cutting member, the head is receivable in said recess, and a removable pin adapted to extend through the blank and engageable in the bores for guiding said cutting member, said pin including a head engageable with the cutting member for driving said cutting member through the blank, said head being cooperable with the substantially conical portion of the die for bending the material cut from the blank.

4. A punching apparatus of the class described comprising a die including an annular cutting edge, said die having a central bore therein, a cutting member cooperable with said die and having a bore therein aligned with the first-named bore, said cutting member and die being adapted to receive a blank therebetween, the cutting member being provided with a reduced head portion, and said die with a correspondingly shaped recess in the upper portion thereof whereby upon inverting the said cutting member, the head is receivable in said recess, and a pin engageable in the bores 4,0 and including a head engageable with the cutting member for driving said cutting member through the blank.

5. A punching apparatus of the class described comprising a die including an annular cutting edge, said die having a central bore therein, a cutting member insertable in said die and having a bore therein aligned with the first named bore, said cutting member having a reduced head portion, said die being provided with a recess therein of the shape of the reduced head portion of the cutting member for receiving the reduced head portion of the cutting member, a second cutting member having a central bore therein, and an annular recess adapted to receive the reduced head portion of the rst named cutting member, said second named cutting member being provided with a reduced head of the same shape and size of the first named cutting member. k

CLARENCE O. LIVERMORE.

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