US792949A

US792949A - Punch and shears.

Info

Publication number: US792949A
Authority: US
Inventors: Lewis Van Dorin
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-09-13
Filing date: 1904-09-13
Publication date: 1905-06-20
Anticipated expiration: 1922-06-20

Description

PATENTED' JUNE 20. 1905.

L. VAN DORIN.

PUNCH AND SHEARS. APPLICATION FILED saw. 13. 1904.

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wimc/aoc/a via, 535mg waxy/f M PATENTED JUNE 20, 1905.

L. VAN DORIN. PUNCH AND SHEARS. APPLICATION FILED SEPT. 13. 11904.

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PATENT FFICE.

PUNCH AND SH EARS.

SPECIFICATION forming part of Letters Patent No. 792,949, dated une 20, 1905.

Application filed September 13, 1904. Serial No. 224,260.

To (all whom, it may concern:

Be it known that I, LEWIS VAN DORIN, a citizen of the United States, and a resident of San Bcrnardino, in the county of San Bernardino and State of California, have invented a new and useful Improvement in Punches and Shears, of which the following is a specification.

My invention relates to an improvement in punches and shears, the object being to provide a simple power punch and shear which will efiectually perform the functions which its name indicates; and further objects are to construct a machine having powerful leverage, while at the same time providing a machine of great simplicity, durability, and cheapness.

WVith these objects in View my invention consists in certain novel features of construction and combinations of parts, which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective, taken from the right side. Fig. 2 is a side elevation taken from the opposite side; and Figs. 3, A, and 5 are transverse sections taken on lines III III, IV IV, and V V, respectively, of Fig. 2.

A frame is preferably made for the machine in a single casting and comprises the base 1, having the laterally-projecting feet 2 2, through which holes 3 3 are formed to receive screws or bolts A tfor securing the machine to the work bench or table. It further comprises the uprights or standards 6 6 and 7 7 at the forward and rear ends of the base, respectively. The base is chambered out through the top, giving it the shape of a trough in cross-section, and the forward end extending back nearly two-thirds of its length is offset or enlarged, as at 9 9, to afford support for the punch-dies 1O 10, which rest on these offset shoulders, where they are held and adjusted laterally by set-screws 11 11, set in from both sides of the base. At the rear end of the base the lower blade 12 of the shears is held between packing-strips 13 13 and the setscrews 14: 14 set in from opposite sides and hearing at their ends against the blade or packing.

A jaw 16, preferably cast in one heavy casting, extends from one end of the machine to the other, being housed and guided between the uprights 6 and 7. This jaw is pivoted at its rear end upon the stud 17, and at its forward end it is guided and supported against lateral vibration by the set-screws 18 18, extending in from opposite sides through the uprights 6 6, and lock-nuts 19 19 hold these set-screws in place. J ournal-boxes 20 20 are mounted in the recessed upper ends of these uprights 6 6, whereon they are held by the stirrups 21 21, which extend along the edges of the uprights and finally into holes 22 22 in the feet 2 2 on the base, where they are securely held by nuts 23 23. Journaled in these boxes is the eccentricshaft 24, which carries a pair of eccentrics 25 25, between which is secured the operating hand-lever 26. Links 27 27 are mounted on these eccentrics and extend from them to the free end of the jaw, to which they are pivoted by means of pin 28, and through this mechanism just described the jaw is controlled, and owing to the length of the operating-lever, the eccentric mechanism, and the connection with the free end of the jaw powerful leverage is afforded for actuating the jaw.

The jaw carries a cutter 29, secured thereto by means of bolts 30 30, which cutter cooperates with the blade 12. As these blades or cutters are located near the pivotal point of the jaw, it will be readily understood that their power' is relatively increased. The punches 31 31 are secured in recesses formed in the jaw by means of set-screws 32 32 in position to enter the dies previously mentioned for punching purposes.

The numeral 33 represents the stripper. This is in the form of a bar which preferably extends from the stud 17 to which it is secured outside of the right-hand upright 7 throughout the length of the machine, the other end extending between the uprights 6 6, and at this point it is secured, by means of a bolt 34:, to one of the uprights 6. This stripper-bar has *a laterally-projecting flange 35, which extends between the jaw and the dies, the flange being provided with holes through which the punches pass, this flange portion 35 being the stripper proper. A trusscombination with a stationary member sup-' rod 36 is connected with this stripper-bar at its center, where it is secured by the bolt 37, and its ends are secured by a bolt 38 at the rear, which also connects the rear ends of the brace-rods I0 40 and the upper ends of the uprights 7 7 together, the forward ends of the bracerods 40 4:0 and the trussrod being mounted upon the projecting ends of the eccentric-shaft 24:, keys 41 41 being conveniently employed to hold them in place. To increase the strength of the jaw, as it is subjected to a good deal of strain, it may be provided with a laterally-projecting rib or flange 42 just over the cutter 29, the latter abutting the rib along its upper edge.

From the foregoing it will be seen that l have provided a simple mechanism having powerful leverage for accomplishing the purposes sought. At the same time the construction is such that any of the parts may be easily removed and replaced or adjusted, as the case may be.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts described without departing from the spirit and scope of my invention, and hence I do not wish to limit myself to the exact construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a cutting and punching machine, the combinationwith a stationary member, standards projecting upwardly at opposite ends thereof, a movable jaw pivoted between the standards at one end, punches and a cutter carried by the movable jaw and dies and a cutter carried by the stationary member, the standards at the opposite end of the stationary member being recessed at their upper ends, of bearings received in the recesses and projecting above the ends of the standards, stirrups passing around the projecting portions of the bearings and extending downwardly beside the standards, bases on the standards, the ends of the stirrups passing through the bases and means for securing them in such position.

2. The combination in a cutting and punching machine, comprising a stationary member, standards projecting upward from each end of the member, a movable jaw pivotally supported between the standards at one end of the member, its free end extending between the jaws at the opposite end of the stationary member and means connected with the free end of the movable jaw for actuating the same, of a pair of oppositely-projecting set-screws extending through the standards and engaging the free end of the movable jaw and locknuts on the screws and engaging the sides of the standards to retain set-screws in adjusted position.

3. In a cutting and punching machine, the

porting a cutter, of a movable jaw pivoted at one end and movable toward and from the stationary member, a laterally-projecting in I tegral rib extending out from the movable jaw and a cutter carried by the jaw, the rear edge of the last-named cutter engaging and abutting the lower side of the rib.

4:. In a cutting and punching machine, the combination with a stationary member, pairs of standards extending upwardly from each end of the member, a movable jaw pivoted at one end between one pair of standards at a point intermediate their ends, means journaled in the opposite pair of standards and connected with the free end of the movable jaw for operating the same, punches carried by the movable jaw, a stripper-bar extending between and secured to the front and rear standards, the forward end of the stripper received between the front standards, stripping means carried by the stripperbar, and a truss-rod, the ends of which are secured to the upper ends of the front and rear standards, respectively, the intermediate portion being connected with the stripper-bar.

5. The combination in a cutting and punching machine, comprisinga stationary member, standards projecting upward from each end of the member, a movable jaw pivotally supported between the standards at one end of the member, its free end extending between the jaws at the opposite end of the stationary member and means connected with the free end of the movable jaw for actuating the same, of a pair of oppositely-projecting setscrews extending through the standards and engaging the free end of the movable jaw.

6. In a cutting and punching machine, the combination with a base having punch-dies and a blade secured therein, standards at opposite ends of the base, a pivoted jaw, a cutter carried thereby, and means for actuating the latter, of a stripper extending the length of the machine and secured at its ends to the standards, one portion of the stripper having an integral lateral flange which extends between the pivoted jaw ancl the dies, and the rear end of the stripper located opposite the blade and cutter and forming a guard during the cutting operation.

7. In a punching and shearing machine, the combination with a stationary member and standards located at each end thereof, of a movable jaw, means for operating the jaw, punches carried by the jaw, a stripper-bar extending between and secured to the standards, a perforated stripper-flange formed integral with the stripper-bar and extending laterally thereof between the movable jaw and the stationary member and a truss-rod secured to the stripper-bar intermediate its ends, the truss-rod connected at its ends to the standards. I

8. In a punching and shearing machine, the

combination with a stationary member, standards located at either end thereof, a jaw secured to one of the standards, and lying above the stationary member, means for operating the jaw, punches carried by the jaw, a stripper extending between and secured to the standards intermediate their ends, links connecting the upper free ends of the standards, and a bent truss-bar, the ends of which are I secured to the free ends of the standards, the

bar being" connected to the stripper at a point intermediate the ends thereof.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

LEWVIS VAN DORIN.

Witnesses:

F. S. WEST, FRANK PERDEW.