US957914A - Punching-machine. - Google Patents

Description

J. H. THOMPSON.

YUNUHING MACHINE.

APPLICATION FILED 5111!.21, 1908.

Patented May 17,1910.

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INVENTVOR WITNESSES 7% m.

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J. H. THOMPSON.

PUNOHING MAGHINE.

APPLICATION FILED mum, 190s. 957,914, V Patented May 17, 1910.

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JOHN H. THOMPSON, OF CHESWIGK, PENNSYLVANIA, ASSIGNOR TO AMERICAN BRIDGE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

PUNCHING-IVIACHINE.

acacia.

Specification of Letters Patent.

Application filed January 21, 1908.

Patented May 1'7, 1910.

Serial No. 411,892.

To all whom it may concern:

Be it known that I, J OHN H. THOMPSON, of Cheswick, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Punching-Machines, of which the followin is a full, clear, and exact description, re erence being had to the accompanying drawings, forming part of this specification, in which Figure l is an end elevation of a punching machine embodying my invention, and Figs. 2 and 3 are respectively end and front views of a portion of the machine showing the application of my invention thereto.

My invention has relation to punching machines of the class described and claimed in the patent to Weatherson, No. 823,148, dated June 12th, 1906. In this class of machines, a support is provided for the plate to be punched, which support is universally movable in a single plane, and which carries a templet or pattern plate located to one side or at one end of the plate to be punched. Centering means are provided which cooperate with the templet or pattern plate to secure the support and the plate relatively to the punch. These centering means consist preferably of a pin carried by a lever and adapted to enter the perforations in the pattern plate or templet. When the pin is en tered in any particular perforation of the templet, and the punch is operated, a hole is punched in the plate in the correct position.

The present invention is designed to provide improved means controlled by the operation of the centering pin, whereby the punch will be automatically thrown into operation when the pin enters a perforation in the pattern plate; that is to say, to provide means whereby the centering pin and the punch may be operated by one motion of the hand, doing away with separate levers and connections for controlling the operation of the tool, enabling the operation of the machine to be carried out more rapidly, and making it impossible to punch holes at a wrong place in the plate by throwing the plunger into operation prematurely.

The precise nature of my invention will be best understood by reference to the accompanying drawings, which will now be described, it being premised, however, that various changes may be made in the details of construction and arrangement by those skilled innthe art Without departing from the spirit and scope of my invention as defined in the appended claims.

In these drawings, the numeral 2 designates the frame of the punching machine, having an overhanging arm 3 in which the punch 4 and its operating mechanism are supported.

5 designates the punch operating shaft, which is driven from the driving shaft 6 by the pinion 7 and gear wheel 8.

9 is the reciprocating ram of the punch which operates upon the tool 4 by means of the gag plate 10, which is arranged to be interposed between the lower end of the ram and the head of the tool.

The parts as thus far described may be of any ordinary or usual character. My in vention is not concerned with the particular construction or character of the punching machine itself.

ll designates the universally movable table or support for the plate to be punched. This is mounted upon the two sets of track Wheels 12 and 13, substantially as shown and described in the Weatherson patent above referred to, to which reference may be had for the details. This table or support may, however, be mounted in any suitable manner for the purpose.

l4: designates the centerin pin, which is adapted to enter the perforatlons in the pattern plateor templet. This pin is loosely connected at its upper end to a hand lever 15, which is fulcrumed at 16 in a link 17 carried by a supporting arm or bracket 18 fastened to the frame member. 2 which supports the moving table 11.

19 is a spring, which is interposed between the lever and the bracket or support 18 for the purpose of normally holding the lever in its elevated position with the pin 14: withdrawn from the pattern plate or templet.

20 is a link, which has a pin and slot connection'21 at one end portion with the lever 15, and which is connected at its opposite The shaft 22 may be conveniently supported and journaled at one end in the casing of the overhanging arm, and its opposite end portion is journaled in a supporting stud 30 which is carried by the arm or bracket 18.

The operation is as follows :-When the operator depresses the lever 15 for the purpose of causing the index or centering pin 14 to enter one of the perforations in the templet, the connections 20, 21, 21 22, 25, 26, 27, 28 and 29 are thereby operated to move the gag 10. underneath the ram of the punch so that the reciprocation of the ram will operate the punch. As soon as the operator releases the lever 15, the counterweight 23 will operate said connections to withdraw the gag plate into the position shown in Figs. 1 and 2, so that the further reciprocation of the ram will not actuate the punch. The slot at the lower end of the link 20 provides for a certain amount of movement of the lever 15 before the connections with the gag are operated, this being for the purpose of insuring the entrance of the index pin into the templet before the punch is thrown into operation.

The advantages of my invention will be apparent. The same motion of the operator which causes the index or centering pin to enter the pattern plate or templet throws the punch into operation, and the withdrawal of the said pin throws the tool out of operation. This not only saves time in the operation of the machine, but it prevents the premature starting of the punch.

While I have shown my invention as applied to a punching machine, in which the operation of the punch is controlled by a gag, it will be readily understood that it is also adapted to those machines in which the operation of the punch is controlled by means of a clutch, the link 26 being connected to a clutch shifting lever instead of to a' gag-shifting lever as shown. It will also be understood that various other changes may be made in the details of construction and arrangement without departing from the spirit and scope of my invention.

I claim 1. In a machine of the character described, the combination of a movable templet and work support, an index pin arranged to cooperate with the templet, a tool acting on the work, a device for throwing the tool into and out of operation, and a system of link and lever connections between the index pin and the said device; substantially as described.

2. In a machine of the character described, the combination of a movable templet and Work support, a lever, an index pin carried by said lever and arranged to cooperate with the templet, a tool for acting on the work, a device'arran ed to eifect the starting and stopping o the tool, a counterweighted lever connected to said device, and a connection between said lever and the lever which carries the index pin; substantially as described.

3. In amachine of the character described, the combination of a movable templet and work support, an index pin arranged to cooperate with the tem )let, a tool for acting on the work, a mova le gag plate for controlling the operation of the tool, and a system of mechanical connections between the index pin and the gag plate; substantially as described.

4. The combination with punching mechanism, of a supporting frame and manually operable centering means arranged to effect the operation of the punch simultaneously with the operation of the centering means.

5. The combination with punching mechanism, of a supporting frame and manually operable centering means, and mechanism connected therewith arranged to effect the operation of the punch dependent on the centering means.

6. The combination with a continuously operating punching machine having a normally inoperative punch, of means for rendering the punch operative, and manually operable centering means operatively connected therewith.

7 The combination with the moving portion of a punching machine and a normally stationary punch, of an interlocking element, and manually operable centering mechanism connected therewith and arranged to effect simultaneous centering and punching operations.

8. The combination with the reciprocating head of a punching machine and a loosely mounted punch spindle, of an interlocking device, a centering pin, and manually operable actuating meohanism operatively connected therewith.

9. The combination with the reciprocating head of a punching machine and a loosely mounted punch spindle, of a shifting block arranged to be inserted between the reciprocating head and the spindle, a centering pin, a manually operable actuating element, and means operatrvely connecting said element with the shiftmg block.

10. The combination with an adjustable plate having a reciprocating head carrying a loosely mounted punch spindle and an 111- terlocking block therefor, of a templet pin and its lever, and means connected therewith for actuating the interlocking block; substantially as set forth.

11. The combination with an adjustable plate and templet frame and a punching machine having a reciprocating head carrying a loosely mounted punch spindle and an interlocking block therefor, of a temp let pin and its lever, a lever engaging the interlocking block, a counterweighted rock shaft, and lever mechanism connecting the and operating means connected therewith 10 rock shaft with said lever and with the for simultaneously actuating the interlocktemplet pin lever; substantially as set forth. ing element, substantially as set forth.

12. The combination with an adjustable In testimony whereof, I have hereunto set plate and templet frame and a punching my hand.

machine having a reciprocating head car- J. H. THOMPSON. rying a loosely mounted punch spindle and Witnesses: an adjustable interlocking element for the C. T. CLAOKY,

punch spindle, of a templet pin and its lever, THos. G. POWELL.

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