US2580756A

US2580756A - Punch

Info

Publication number: US2580756A
Application number: US745681A
Authority: US
Inventors: Frank J Furman
Original assignee: International Business Machines Corp
Current assignee: International Business Machines Corp
Priority date: 1947-05-03
Filing date: 1947-05-03
Publication date: 1952-01-01
Anticipated expiration: 1969-01-01

Description

Jan. 1, 1952 F, J FURMAN 2,580,756

PUNCH 3 Sheets-Sheet 2 Filed May 3. 1947 INVENToR FRANK. J. FuMAu MW ATT RNEY F. J. FURMAN v PUNCH Jan. 1, 1952 3 Sheets-Sheet 5 Filed May 3'. 1947 INVENTOR FRANK J. FUBMAN Patented Jan. l, 1952 PUNCH Frank J. Furman, Endicott, N. Y., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application May 3, 1947, Serial No. 745,681

4 Claims. l

ihis invention relates to an apparatus for punching a record sheet with data or machine controlling codes.

The general object of the invention is to provide a punch of simple construction, which is capable of punching accurately located holes in sheet material.

A punch constructed in accordance with the invention is well suited for punching holes in tapes for tape controlled machines of the kind disclosed in the copending application of A. W. Mills, F. J. Furman, and E. J. Rabenda, Ser. No. 609.854, filed August 9, 1945, which has matured into patent No: 2,531,885 dated November 28, 1950. Since a tape of this kind, once punched, is used for a more or less extended time, the punch does not need to be capable of high speed operation, but it must punch the holes very accurately.

Accordingly, it is a particular object of the invention to provide a tape punch with mechanical means to insure correct relative positioning of the punch and the tape holding means and interlocking means to prevent operation of the punch if it is so far out of position that it cannot be accurately centered on its way toward the tape.

A control tape of the kind described, which is used for controlling line spacing, skipping, and over-flow feed of an automatic carriage. has holes punched at various multiples of the line space distance, along the tape. It is another object of the invention to provide a punch which can be operated to punch holes at an exact distance apart along the tape, which may be any multiple of the line space distance.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a plan view of the punching device showing the casting, tape guide pins, punch handle, and column shift dial.

Fig. 2 is a cross-sectional plan view, on the line 2-2 of Fig. 3.

Fig. 3 is a section taken on line 3 3 of Fig. l showing the punch in the normal position.

Fig. 4 is a cross-sectional view similar to Fig. 3 only showing the punch in the operated position.

Fig. 5 is a section taken on line 5-5 of Fig. 2.

Fig. 6 is a section taken on line 6-6 of Fig. 1.

Fig. 7 is a view of the record tape.

The invention will now be described in detail 2 by reference to an illustrative embodiment shown in the drawing, which is designed particularly for punching a control tape.

The device consists of a metal casting or body portion I0 which serves both as a cover and as a hollow base since the underside of the casting is open to receive a plurality of parts which, in combination, perform certain functions hereafter described. The casting is mounted on four rubber caps I I which are inserted over four bosses I2. A rib section I3, which is an integral part of the casting, is formed to ,support portions of the punch and interlock mechanisms hereafter described, and in addition receives a handle I4 for actuating said punch and interlock mechanisms. Two slots I6 in the casting receive two paper positioning pins Il. A dial I8 with the numbers l through l2 printed thereon is fixed on a shaft I 9. which is rotatably mounted in the casting through boss 20.

The dial is used by the operator to move the tape transversely underneath the punch mechanism in order to select any one of 12 punching positions across the width of the tape. Fig. 7 shows the tape with 12 columnar punching positions. The series of pre-punched holes I5 down the middle of the tape are for locating the tape on the two pins Il and eventually serve as feed holes for the tape.

Referring to Figs. 2 and 5, the mechanism provided for transversely positioning the tape consists of a plate 2| slidably mounted on a plurality of bosses 22 and retained thereon by three plates 22a, a detent block 22h, and a strip 22c all of which are bolted to bosses 22 and have grooves to allow plate 2| to slide freely. A U shaped notch is cut in one end of plate 2| to allow the plate to slide past a triangular boss 23. The purpose of this boss will be described later. Teeth 24 are cut along one edge of plate 2| and mesh with a. gear 25 which is retained upon a boss 26 by a washer 21 and screw 28. Gear 25 meshes with a gear 29 which is fixed to the shaft I9 previously mentioned as being fixed to dial I8. Turning dial I8 will cause gear 29 to turn gear 25 which in turn will cause plate 2| to slide back and forth and thus pins II which are attached to plate 2| will move the tape transversely.

In order for plate 2| to establish a punching position the following mechanism is provided. Referring to Figs. 2 and 5, the detent block 22h has a chamber 3|! which contains a free sliding detent 3|. A spring 32 is inserted in the chamber and compressed between the detent and a screw 33, thereby urging the detent against a 3 series of I2 notches Il cut along the edge of plate 2l. Hence when the dial is turned one position. plate 2i will cam the detent in until .the next notch is in position to allow the detent to seat itself and position the plate.

Referring to Figs. 3, 4, and 6, a die 30 is secured in a socket of the triangular boss 23 by screws 4l. On a forwardly extending arm Ila of the rib section I 3 is a vertical punch guide 4I in which slides a punch 42, for coaction with the die. A stripper Il has a forked end embracing the punch and is secured to a part Ib of the overhanging arm Ila by a screw Il. The upper end of the punch hangs upon one end of a lever I5, the opposite end of which is swiveled in a seat formed by a portion 48 of the casting, a washer 41, and a screw Il. The lever is embraced by the forked end of a lug l! extending downward from the handle I4 and is held thereto by a pin Ill. A spring 5I held in a socket 52 on the arm i3d bears against the lower side of lever` I5 and holds the punch normally in its upper position.

The handle I4 is pivoted at 54 on a bearing fork 55 of the arm Ita and is curved downward at its opposite end to extend through an opening 56 in the casting. A plunger 51 has its upper end slotted to straddle the lever and bears against the bottom side of the handle. under the force of a spring 58 surrounding its reduced lower end 59.

The upper end of the plunger 51 is guided by a stationary bracket 60, while its lower end 59 is guided by a bushing 6I in a boss 62. The plunger normally holds the handle Il up in the position shown in Fig. 3, with a lip G3 on its right end against the bottom of the casting. The reduced lower end 59 of the plunger coacts with a series of index holes B4 in the plate 2|. These holes have a beveled countersink on the side toward the plunger, which serves to center the plate 2i at the chosen columnar position.

The device operates in the following manner. The operator places the tape under the stripper I3, and positions it longitudinally so that the two pins Il will project through a particular pair of pre-punched feed holes to locate a certain transverse line of the tape over the die. The operator will then move the tape transversely to any one of the twelve columnar positions, by turning dial I8 until the corresponding number comes opposite the index mark. With the tape now placed in the desired punching position, the operator presses the handle Il down, said handle pivoting clockwise about bolt 54, thereby forcing plunger end 59 down and through one of the holes 64 in plate 2 I If the plate was positioned accurately enough by the dial and detent block, the plunger will enter the hole freely. If plate 2i is slightly out of position for accurate punching. the plunger will strike the counter-sunk portion of the holeand move plate 2i into an an accurate position. If plate 2l is out of position enough, the plunger will not hit the hole but will be stopped by plate 2l which acts as an obstructing surface and no punching can be effected. This arrangement thus serves as an interlock to guarantee accurate punching.

Pressing on the handle will also force lever'arm 4U to pivot counterclockwise on the seat I6, driving the punch through the tape to punch the hole. When pressure on the handle is released, spring Il will restore the plunger and handle to their normal position and spring II will restore lever arm ll to its normal position. thereby withdraw- Ing the punch from the tape. 1

The lower part of the die Il is expanded into a cup il having a bead over which fits a stiff rubber cap n. to catch the punchings.

While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

i. In a device for punching a sheet having a series of pre-punched locating holes therein, a die, a punch coacting therewith, operating means for said punch, sheet positioning means comprising a plate having a plurality of aligned prongs to engage selected ones of said locating holes for holding the sheet between the die and punch, said plate being provided with a series of teeth on a first edge, means meshed with said teeth for shifting said positioning means transversely to the line of said prongs, and centering means for said sheet wherein said plate is provided with notches on a second edge and a series of centering holes spaced apart along the line of movement, a detent, means for forcing said detent into a selected one of said notches and a plunger positively actuated by said punch operating means to enter a selecd one of said centering holes upon operation of said punch and to prevent movement of the punch operating means when the movable plate is not in position to allow said plunger to enter a centering hole.

2. In a device for punching a sheet having a series of prepunched locating holes therein, a body portion, a die, a punch coacting therewith, a punch actuating handle mounted to said body portion, a punch operating lever from which said punch depends. a connection between said handle and said lever whereby actuation of the handle causes the lever to operate said punch, andv sheet positioning means comprising a plate having a plurality of aligned prongs to engage selected ones of said locating holes for holding the sheet between the die and punch, said plate being movably mounted and having a series of centering holes spaced apart along the line of movement, means locating said plate so as to operatively and selectively position one of said centering holes, a plunger operatively and positively moved by said punch actuating handle to enter the selected one of said centering holes upon operation of said punch thereby accurately positioning the sheet. said plunger preventing movement of the punch actuating handle when the movable plate is not imposition to allow the plunger to enter a centering hole.

3. In a device for punching a sheet having a series of prepunched locating holes therein, a body portion having a hole therein, a'die, a punch coacting therewith, 'a punch actuating handle pivotally mounted on one end thereof to said body portion and movable at its free end through said hole in the body portion, a punch operating lever pivoted at one end thereof to said body portion. said punch depending from the free end of the punch operating lever, a pivotal connection between said actuating handle and said punch operating lever whereby actuation of the handle s. causes the lever to operate said punch, and sheet positioning means comprising a plate having a plurality of aligned prongs to engage selected 'ones of said locating holes for holding the sheet between the die and punch, said plate being movably mounted and having a series of centering holes spaced apart along the line of movement. means locating said plate so as to operatively and selectively position oneof said centering holes, a

plunger operatively and positively moved by said 1|) punch actuating handle to enter the selected one of said centering holes upon operation of said punch thereby accurately positioning the sheet, said plunger preventing movement ot the punch actuating handle when the movable plate is not 1 in position to allow the plunger to enter a centering hole.

REFERENCES CITED The following references are of record in the tile of this patent:

UNITED STATES PATENTS Number Name Date 487,737 Hollerith Dec. 13, 1892 524.623 Walsh Aug.'14, 1894 641,333 Saltzkorn et al Jan..16, 1900 748.823 weaning Jan. 5, 1904 1,289,636 Brown Dec. 31, 1918