US1040497A

US1040497A - Punch.

Info

Publication number: US1040497A
Authority: US
Inventors: Benjamin E Bosler
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-06-22
Filing date: 1909-06-22
Publication date: 1912-10-08
Anticipated expiration: 1929-10-08

Description

B. E. BOSLBR.

PUNCH.

APPLICATION FILED JUNE 22. 1909.

Patented Oct. 8, 1912.

IN! 'ENTOR. Beg'apuip EJ90810 3&0, ac/

n I I 1 IVITNESSES.

BENJAMIN E. BOSLER, OF JOHNSTOWN, PENNSYLVANIA.

men.

Speciflcation of Letters Patent.

Patented Oct 8, 1912.

Application filed June 22, 1909. Serial No. 508,591.

. To all whom it may concern:

Be it known that I, BENJAMIN E. BOSLER, a citizen of the United States, residing in the city of Johnstown, in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in Punches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to punches used in perforating metal and especially to those which form a fiat surface around the hole to provide a bearing for a bolt-head, nut, or washer.

This type of punch is adapted for use in the manufacture of splice-bars for railwayrails or for forming bolt-holes in any object having a curved surface.

The object of my invention is to provide a punch in which the hole-forming part is removable from the part which forms the flat bearing surface around the hole, both of which parts may be made separate from the punch-stock. This form of construction enables the same stock to be used for different punches and also obviates the necessity for replacing the entire punch whenever there is a flaw in but one art.

Referring to the sheet 0 drawings accompanying this specification, inwhich like characters of reference indicate like parts throughout the views:Figure 1 is a vertical transverse section through the lower part of a punching apparatus, showing my improved punch in position. This figure also shows the relative positions of the un'ch, die, splice-bar and clamp for holdmg the splice-bar, at the extreme end of a stroke. of the punch. Fig. 2 is a vertical transverse section of a punch-stock, showing an oval punch in elevation and Fig. 3 is a bottom plan View of the same. Fig. 4 is a vertical transverse section of a punch-stock, showing a circular punch in elevation and Fig. 5 is a bottom plan view of the same.

Referring now to the drawings in detail, 1 indicates the ram which is reciprocated by suitable means not shown. The punchholder 2 is adjustably mounted on the ram and secured as shown. The clamping-die 3 is secured to rods 4 which pass through and above the ram. These rods are used in opcrating the clamping-die, the mechanism not being shown. The die 5 for the punch is inserted in the die-block 6 which is adjustably mounted on the bed 7. The upper end of my improved punch-stock 8 is tenoned so as to fit into a corresponding mortise on the punch-holder. The lower end of the stock is made smaller than the body part and is threaded to fit the cap forging member 9. The cap forging member and stock may be made of the same or of different degrees of hardness as desired. The lower face of the cap forging member is made substantially fiat and is used in forming a bearing surface around the holes made by the punch. The punch 10 abuts the lower end of the punch-stock and is held in place by the cap forging member 9.

In punching oval holes in splice-bars it is desirable to have the long axis of the holes parallel to the axis of the bar. In order to hold the punch .in the proper position and prevent it from turning during use, I provide the tenon 11 on the punch and a corresponding mortise in the punch-holder as shown in Figs. 1, 2 and 3'. This construction may be dispensed with in the case of circular punches, the punch and stock then being of the form shown in Figs. 4 and 5.

Although I have shown and described my improvements in considerable detail, I do not wish to be limited to the exact and specific details shown and described, but may use, such substitutions, modifications or equivalents thereof, as are embraced within the scope of my invention, or as pointed out in the claim.

In apparatus for punching splice-bars, a

,pair of clamping dies shaped to conform to the rail-fit portions of said bars, means for holding the same firmly, a punch, a punchstock, and a s;waging-cap having a flat end In testinnon whereof I hereto efiix my of larger dlemeter than said punch sursignature In t e presence-0f two wltnesses.

roundin and clamping said punch rigidly to said gtock, the punch being adapted to BENJAMIN BOSLER' 5 make a hole in the splice-bar and the swag- Witnesses:

ing-cap to indent and make a flat surface WM. J. FITZMAURIOE, J12,

around the punched hole. ELMER SEAVEY.