US1632305A

US1632305A - Process for the production of stamped figures

Info

Publication number: US1632305A
Application number: US39301A
Authority: US
Inventors: Mcgrevy Jeremiah
Original assignee: SOLIDARITY WATCH CASE Co
Current assignee: SOLIDARITY WATCH CASE Co
Priority date: 1925-06-24
Filing date: 1925-06-24
Publication date: 1927-06-14
Anticipated expiration: 1944-06-14

Description

June 14, 1927. 1,632,305

- J. MOGREVY PRbcEss FOR THE PRODUCTION OF ISTAMPEDVFIGURES Filed June 24, 1925 Patented June 14, 1927.

UNITEDNSTATES PATENT OFFICE.

JEREMIAH MCGREVY, E RICHMOND HILL, NEW YORK, ASSIGNOR T0 SOLIDARITY WATCH CASE COMPANY, on NEW YORK, N. Y.. A CORPORATION on NEW YORK.

PROCESS FOR THE PRODUCTION OF STAMPED FIGURES.

. Application filed June 24, 1925. Serial No. 39,301.

WVhile this invention has for its specific object a process for the convenient and economical production of raised figures numerals to be applied to Watch dials, it is not restricted to the production of these articles alone, but may be used for the productlon of similar ones. However, in the following specification the description will be that of the production of a numeral to be applied to a watch'dial.

Modern practice demands that these figures be provided with lugs projecting from the rear surface thereof to be received in holes accurately punched in the watch dial for the purpose of securing the figure in place and to locate it on the dial. The accuracy demanded on the production ofthese figures is very great as the dial is conspicuous and demandsv high finish. This requires that the lugs be accurately located at desired points on the figure. It has been proposed to secure this accuracy by forcing up the lugs from a-sheet of metal and at the same operation by which the lugs are formed to punch guide holes in the sheet, by which the part of the sheet carrying the guide holes and the lugs may be properly locatedv on a blanking die provided with dowel pins adapted to take the hole and thereby locate the blank. This however demands the use of 'an unnecessarily large blank from which the figure is to be formed and is objectionable in that the distortion of the blank may have destroyed the proper M location of the pins and holes. I propose to overcome the defects noted and to obtain advantageous results by stamping lugs up on a blank of no reater size than is necessary for the formatlon of the desired figure, and 0 to then'transfer such blank to a blanking die, the pad of which is provided with holes adapted to receive the lugs on the blank to thereby properly locate the blank. This being' done the. punch may be depressed, thereby cutting out the, figure with the lugs thereon, the lugs themselves having located the material from which the figure is cut.

Referring to' the accompanylng drawings in which corresponding parts are designated by similar marks of reference; 7

. Fig. 1 is a blank having feet formed thereon suitable for the formation of a figure such as described. Fig.2 is the figure as out out.

' Fig. 3 is a sectional view of a swaging die suitable for the manufacture of the blank shownin Fig. 1, a blank being shown in this figure as well as the plunger of the press.

Fig. 4 is a similar view of a blank ng die. Fig. 5 is an enlarged perspective view of the pad shown in Fig. 4.

In carrying out my invention font a suitable blank of thin ductile metal ofa size approximating that of the finished article shown in Fig. 2: This blank is fed to a swaging press, shown in Fig. 3. The die A of this press has in its face several depressions a. and upon the descent of the plunger B the blank is reduced in thickness and metal of it is forced into such holes forming lugs 2, as is shown on the blank of Fig. 1. The blank is now removed from the swaging press and transferred to a blanking press. The die 0 of this latter press has a spring supported pad D workas is well known. In addition to the usual practice, however, I provide in the upper face of the pad, holes d corresponding in .their spacing with the holes a of the swaging die for the same figure. lln putting the blank into theblanking die the lugs on the blank are placed in these holes in the pad of the latter, and then the plunger E is depressed forcing a partof the metal of the blank downwardly into such recess and severing it from the balance of the blank.

Upon the plunger rising the pad ejects this punched out figure having on its rear the lugs.

mg in an accurately shaped recess in the die It will be understood that for each figure there will be at least one blanking die and probably also a swaging die, althou' h it is possible to use the same swaging die or several different figures. The subject-matter of the blanking press is claimed 1n my copending application Sr. No. 149,757, filed Novem r 20th, 1926.

Having described my invention what I claim is:

1. The process of forming figures to be applied to surfaces, which consists in swaginga metal blank of approximate size for the desired figure with properly located lugs on one surface thereof and then locating such blank in a blankin press by such lugs and-punching out the gure with the lugs thereon.

2. The process of forming figures to be applied to surfaces, comprismg swaging an individual blank to form lugs on one side individual blank to form lugs on one side thereof, locating said swaged blank on the thereof, locating said swaged blank 0n the l pad of a blanking press having a configurapad of a blanking press, having a configuration of the finished figure, and'punching out tion of the finished figure, by the engage- 5 the figure withthe lugs thereon to the conment of such lugs in recesses in such pad, figuration of the pad. 2 and punching out the figure with the lugs 3. The process of forming figures to be thereon to the configuration of the pad.

applied to surfaces, comprising swaging an JEREMIAH MQGREVY.