US2970753A

US2970753A - Tape punch

Info

Publication number: US2970753A
Application number: US687663A
Authority: US
Inventors: Joseph E Lisinski
Original assignee: International Business Machines Corp
Current assignee: International Business Machines Corp
Priority date: 1957-10-02
Filing date: 1957-10-02
Publication date: 1961-02-07
Anticipated expiration: 1978-02-07

Description

J. E. LISINSKI Feb. 7, 1961 TAPE PUNCH 3 Sheets-Sheet 1 Filed Oct. 2, 1957 FIG.1

INVENTOR.

JOSEPH E. LlSlNSKI Ma w. M

ATTORNEY J. E. LISINSKI Feb. 7, 1961 TAPE PUNCH 3 Sheets-Sheet 2 Filed Oct. 2, 1957 2,; m2; 3 ho Feb. 7, 1961 J.- E. LlSlNSKl TAPE PUNCH 3 Sheets-Sheet 3 Filed Oct. 2, 1957 55 I023 2 mm 22 EwoEzT wEEw Emma EQEEpE' mwwonEEE 12,970,753 Patented Feb. 7, 1961 TAPE PUNCH Joseph E. Lisinski, Poughkeepsie, N.Y., assignor to International Business Machines Corporation, New York, N.Y., a corporation of New York Filed Oct. 2, 1957, Ser. No. 687,663

2 Claims. (Cl. 234-115) This invention relates to punching apparatus and more particularly to an improved device for entering data in the form of punched holes in a paper tape.

Briefly stated, a frequency-doubling toggle link is driven by the vibrating armature of an alternating current magnet, and interposers are effective when actuated to couple the frequency doubling toggle to a respective punch pin of a selected interposer for driving the pin through the paper tape. The tape feeding device is operable from the toggle link to move the tape in column by column cycles under control of a feed magnet.

It is a principal object of this invention to provide an improved tape punch.

It is another object of this invention to provide a selectively controllable two speed tape punch.

It is another object of this invention to provide a tape punch which operates at twice the frequency of the alternating voltage applied to the power magnet.

It is a still further object of this invention to provide an improved tape punch which is cyclically operable at the frequency of the A.C. power supply or twice that frequency.

It is an object to provide punching apparatus having an electromagnet, a voltage supply providing an alternating current to the eiectromagnet, a crank mounted for pivotal movement, mechanism coupling the magnet to the crank for rocking the latter about its pivot in response to energization and de-energization of the magnet, a die, an interposer, a bail slidably mounted in a portion of the machine frame, a link pivotally connected between the crank and the hail, the bail having openings therethrough to slidably receive an end of the punch and for admission of the interposer above the end of the punch to couple the punch to the bail mechanism, a member mounted for rocking movement with respect to a reference line and having a slot at an end, an arm having one end pivotally mounted on the frame and loosely coupled at the slot in the member, and a spring biasing the member in posi tions to each side of the reference position.

It is another object of'this invention to provide punching apparatus having a bail mounted for reciprocation and having a plurality of openings therein, a frequency doubling linkage connected to the bail and effective to reciprocate the bail when operated, a power mechanism for operating the frequency doubling linkage, a die having openings therein, a group of punches each having an end slidably r eceived in the die and another end slidably received in a respective one of the openings in the bail, circuits including a group of magnets each associated with a re spective one of the punches and effective to be energized and tie-energized in response to data signals, and mecha nism including interposer elements, one for each of the punches, openings in the bail, and associated magnets and each extendable within the bail opening to couple the bail to the corresponding punch for reciprocation in response to operation of the associated magnet.

It is another object of this invention to provide a punch as heretofore described having an overcenter linkage for restoring the extended interposers after their associated magnets have been de-energized.

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:

Figure 1 is a side view of the punching and feedin device, partly in section.

Figure 2 is a diagrammatical drawing of the frequency doubling link at various stages of movement during one half of an A.C. sine wave.

Figure 3 is a timing chart showing a full A.C. sine wave with corresponding feed and punch mechanical reference points.

Figure 4 is a diagrammatical drawing of various stages of interposer movement.

Figure 5 is a diagrammatical illustration of the tape feed mechanism in three positions during the feed cycle.

In Figure 1, a mechanism is shown which is arranged to provide feeding and punching with a vibrating armature of a magnet operated from A.C. voltage. To obtain punching at the frequency of the alternating current supply, a half wave rectifier circuit is used and to obtain twice the frequency of the A.C. supply the rectifier is removed from the circuit and the normal A.C. input is supplied to the magnet. Since with each reversal of the alternating current sine wave the armature is attracted to its core and then returned by the armature spring, the armature makes strokes at twice the alternating current frequency if a full wave is provided.

A yoke 26 of an electromagnet 22 is attached to a bracket 24, the latter being supported on a portion of the machine frame 26. A spring 28 is coupled to a side portion of the magnet yoke 29 and extends over and generally horizontal to a core 30 about which the coil 32 is wrapped. A magnet armature 34 is coupled to the spring 28 in its position adjacent the core so that upon energization of the coil 32 the armature is attracted toward the core. The spring 23 normally biases the armature away from the core 3 0, and a second spring 36 bears upon the spring 28 and against a screw 38, the latter being adjustably supported in the machine frame. It is pointed out that the biasing efifect of the spring 28 may be controlled by adjusting the screw 38 which in turn decreases or increases the effect of the spring 28 on the armature 34. When an A.C. voltage is supplied to the power magnet at a pair of terminals 39 and a switch 48 is closed, the armature 34 moves toward and away from the core 30 at twice the frequency of the supply voltage. An arm 41 is pivotally coupled to a shoulder 42 on the bracket 24. One end of a link 48 is pivotally connected to the end of the spring 28, and the other end of the link 43 is pivotally coupled to the displaceable end of the arm 41, the coupling pro viding generally vertical reciprocating motion of the link 4-8 as the spring 28 is vibrated. A crank 50 is pivotally supported by a pin fixed to the machine base (not shown), and one arm of the crank is pivotally coupled to the lower end of the link 48. The other end of the crank 50 is pivotaily coupled to a connecting link 52. A punch bail 54- is slidably engaged in a portion of the machine base 26, and its upper portion is pivotally connected to the lower end of the link 52. With this arrangement of parts, movement of the link 52 imparts vertical reciprocatory motion to the punch bail 54.

In Figure 2, four positions of the mechanism just described are shown in relation to one half of the A.C. sine wave supplied to the power magnet. The point 60 is the point where the current in the coil 32 is 0, and the point 62 is the point where the current is a maximum with the armature 34 being attracted a maximum amount. When no current is flowing through the magnet coil, the arm 41 is at its maximum counterclockwise position and at its greatest distance away from the punch bail, and the crank 50 is at its maximum clockwise position as shown in Figure 2. The link 52 is in one of its two rest positions where the punch bail 54 is at its uppermost position. When the arm 41 is pivoted clockwise from its uppermost position to a substantially horizontal position, the bell crank 50 pivots counterclockwise forcing the link 52 downwardly and in turn the punch bail 54 is caused to move to its lowermost position. When the link 41 is pivoted to its lower clockwise position carrying the crank 50 to its maximum counterclockwise position, the link 52 is at the other of its two rest positions and the punch bail 54 is withdrawn to its uppermost position. As the current through the coil begins to decrease, the spring 28 (Figure 1) moves the armature 34 away from the core 30 causing the link 48 to move upwardly, pivoting the arm 41 counterclockwise. Thus, the arm 41 comes to a substantially horizontal position for the second time in the half cycle, and the link 52 once again returns to the lowermost position where the punch bail 54 is at its lowermost position. Finally, when the current ceases to flow in the coil, the arm 41 isretracted to the rest position where the punch bail 54 is once again in its uppermost position. Thus, it will be noted that for each stroke of the armature two downward strokes are imparted to the punch bail 54. However, only one of these is used for punching. The other stroke is used for setting up code interposers for the following punching operation with punching occurring on the upstroke of the power magnet armature while the tape is at rest as will later be described.

In Figure 1, a punch 64 is slidably received in a stripper 66 and is aligned by the latter and the base 26 for vertical movement.- A die 68 is positioned beneath the stripper 66, and a tape 70 passes between the die and stripper and is moved horizontally by a predetermined amount each punching cycle. When the punch 64 is caused to move downwardly, the punch is driven through the tape 70 and extends into the die 63. The other end of the punch 64 is slidably received within the bail 54 and extends into a slot 72 in the bail. An interposer member 74, of which there is one for each punch pin, has a stepped end 76 which is received within the slot 72 for its respective punch 64. With the interposer 74- in the position shown in Figure 1, reciprocation of the bail 54 is ineffective to move the punch 64 since the upper punch end and the interposer step 76 are free to move within the limits of the slot 72. As an illustration, when the bail 54 is in its uppermost position as shown in Figure 4 and the punch bail 54 has moved downwardly with respect to the punch pin 64 which has remained retracted because the interposer has not been operated, the tape is not perforated.

, In Figure l, a code magnet 80, vof which there is one for each interposer and punch combination, is suitably supported on a portion of base 26 (not shown) and is connected in series relation with a contact 82, a switch 84, a source of DC. potential (not shown). The switch 84 may be operated by a key, the latter being actuated in response to code designations indicative of the data to be recorded on the tape. A combination armature and bell crank 88 is pivotally mounted on a pin fixed to the machine base, and the crank end of the armature 88 is pivotally connected to an end of the interposer 74. When the switch 84 and the contact 82 are closed, the magnet 80 attracts the armature 88 pivoting the latter in a clockwise direction. This movement, in turn, causes the interposer 74 to move toward the punch bail 54 where the stepped portion extends into the slot 72. Accordingly, when the punch bail 54 is caused to move downwardly, the upper portion of the slot 72 bears upon the upper portion of the interposer 74 effectively coupling the punch bail to the punch pin 64, as shown in Figure 4, driving the latter through the tape as indicated.

An over-center linkage will now be-described and its near their point of connection.

relationship to the rest of the parts explained, so that it will be evident how the interposer contact 82 is arranged to control which portion of the half cycle punching takes place. In Figure 1, an arm 92 is pivotally supported at one end by a pin fixed to a portion of the base 26, and the other end of the arm 92 is loosely and pivotally connected to a slot 93 at an end of an interposer trip lever 94. The lever 94 is pivotally connected by a pin fixed to the base and has an upper portion 96, which is engageable with at least one of the

members

50 and 52 The member 94 has a lower end 97 with a projection in alignment with the slot 72 and adjacent thereto, the projection being engageable with the interposer 74. A spring 98 is connected between the upper portion of arm 92 and the machine base 26 to bias the over-center link 92. As a result, the interposer trip lever 96 is normally held in its maximum counterclockwise position as shown in Figure 4.

Assume for the purposes of illustration that the linkages are in the position as first shown in Figure 4 and that the current to the power magnet 32 is passing through 0 and going negative as shown in Figure 3. As the arm 41 is pivoted downwardly, the punch bail 54 is moved downwardly and when the armature 34 is completely attracted, the parts are in the positions as shown with the contacts 82 closed. At this time if the switch 84 is closed, voltage is applied to the code magnet causing the armature of crank 88 to pivot clockwise and move the interposer 74 to the left within the slot 72 resulting in clockwise movement of the interposer trip lever 94 from the initial position shown in Figure 4 to the final or extended position. Movement of the punch bail 54 downwardly with the interposer inserted in the slot 72 causes the punch pin 64 to be driven through the tape. The interposer trip lever 94 has pivoted clockwise due to the movement of the interposer 74- and caused the over-center linkage 92 to assume the other of its two stable positions. Although the contact 32 opens as the frequency doubling link 52 moves to the left and the magnet 30 is de-energized thereby, the interposer 74 is not withdrawn but rides along with the punch bail 54 during the punch cycle since the interposer is not spring returned. As the crank 50 moves clockwise and the frequency doubling link 52 moves to the left at theend of the punch cycle, a portion of the crank 50 engages the upper portion 96 of the interposer trip lever 94 and moves the latter counterclockwise, tripping the over-center linkage 92 which, in turn, resets the interposer 74 by moving the latter from left to right from the extended position shown to the ini tial position in Figure 4. 'As interposer magnets are energized for the next punch cycle, the code interposers automatically reset over-center linkage mechanism $22 as previous-ly explained.

As shown in Figure 3, the interposer reset cycle starts near the end of the punch cycle, and the interposer is completely withdrawn early in the next feed and punching cycle. Furthermore, the point at which the interposer contact 82 closes is well illustrated in Figure 3 with respect to feeding and punching time.

In Figure 1, operation of the feeding mechanism to cause the tape to be stepped one column is under the control of an electromagnet 160 Which is selectively energized by a voltage and switch (not shown). The feed magnet 1% is shown in its energized condition which is the condition for positioning the mechanism for feeding the tape. A feed rod 198 is pivotally coupled to the arm 41 and reciprocates in response to motion of the latter. Pivotally connected to a pin up fixed to the machine base is an arm 112 having one end pivotally connected to the member 108 and the other end pivotally coupled to a pawl 164. An armature 113 is pivotally coupled by a fixed pin to the base of the machine and a spring 114 is arranged to bias the armature counterclockwise against the pull of the magnet 1%. A link 115 is pivotally connected at one end to the armature 11$ and at the other end to the pawl 104. With this arrangement of parts, each down stroke of the rod 108 causes a rotatably mounted ratchet 118 to be stepped one tooth clockwise as shown diagrammatically in Figure 5 and on the upstroke of the feed rod ms, the pawl 194 is reset into the next tooth. To prevent overriding of the detent at high speeds an adjustable stop 120 is positioned above the pawl.

When it is desired to suppress feeding of the tape, the D.C. voltage provided to the feed magnet coil 100 is removed causing the armature 113 to pivot counterclockwise as shown in Figure 5 at the urging of the spring 114 and pivot the pawl 104 counter clockwise to prevent the pawl from engaging the teeth from the ratchet 118.

Tape advance consumes approximately half of a complete full operating cycle or about half of a. half cycle. The interposer contacts 82 start to close before the tape 70 has come to rest and the code magnets 80 are pulsed at this time. At the instant of reversal of the punch bail 54, the magnets 80 are sealed, forcing the interposers 74 into the slot 72. The bail 54 starts down and gradually clamps the punch to force the latter through the tape. At the other end of the punch cycle, the interposers 74 are started restoring by the over-center linkage 94 before the start of the next feed cycle but are completely restored early in the next cycle.

It is pointed out that for each two downward strokes of the punch bail 54, there is only one downward stroke of the feed rod 108 since its motion is derived from member 41 and not from the frequency doubling mechanism. Although the explanation has been given for a full A.C. sine wave it is pointed out that one complete cycle of feeding and punching is accomplished during a half cycle. Accordingly, to obtain operation of the device at half speed it is merely necessary to use a rectifier 130 in the power supply to the power magnet. Thus, the voltage available to the power magnet will consist merely of the positive or the negative portion of the sine wave depending upon the polarity of the rectifier 139. The device then operates during voltage portion of the cycle and remains at rest for substantially a half cycle.

While only one punch 64 has been shown and two interposers 74 are indicated with their respective code magnets, it will be understood that the bail 54 accommodates a plurality of punch pins 64, each having an associated interposer 74 and a code magnet 80 and armature 88. Accordingly, each punch may be operated individually and in various combinations with other punch pins to perforate the tape with code notations, each indicative of data according to the setting of switches such as the switch 84 for each interposer magnet. The input to the device may be from another tape where the record on the first tape is reperforated to the second tape in the manner well known in the telegraphic art. It should be noted that the insertion of the interposers into the slot 72 at resetting of over-center linkage 92 takes place at low acceleration points of the frequency doubling toggle while the punches enter the tape at high acceleration in uniform velocity.

While there has been shown, described and pointed out the fundamental novel features of the invention as applied to the preferred embodiment it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated 5 and in its operation may be made by those skilled in th 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:

1. A tape punch comprising, in combination, motive means including, an electromagnet, a supply of A.C. voltage connected to said magnet, a frame, a bail mounted for reciprocation having a plurality of openings therein, a crank mounted for pivotal movement on said frame, means coupling said motive means to said crank for rocking the latter about its pivot in response to movement of said motive means, a die, a link pivotally connected between said crank and said bail, a plurality of punches, each having an end slidably received to said die and another end slidably received in a respective one of said openings in said bail, circuits including a plurality of magnets, each associated with a respective one of said punches, eflective to be energized and de-energized in response to data signals, means including interposers, one for each of said punches and its associated magnet and each extendable within a respective one of said bail openings to couple said bail and the corresponding punch for reciprocation in response to operation of the associated magnet, and means operated in response to movement of said crank and including a mechanism movable to one or the other of two stable positions for restoring extended interposers after magnets associated therewith have been de-energized.

2. A tape punch comprising, in combination, a power magnet, a source of A.C. voltage connected to said power magnet, a bail mounted for reciprocation having a plurality of openings therein, a frequency doubling mechanism connected to said bail and arranged to assume one or the other of two rest positions and effective to reciprocate said bail when operated, means including an armature biased away from said power magnet and attracted to the latter when energized for operating said frequency doubling mechanism, a die and stripper assembly, a plurality of punches each having an end slidably received in said die and stripper assembly and another end slidably received in a respective one of said openings in said bail, circuits including a plurality of magnets and switches, each of said switches in series with one of said magnets and associated with a respective one of said punches, said magnets effective to be energized and de-energized in response to the closing and opening of said switches and to operation of said frequency doubling mechanism in one of its two rest positions, means including interposers, one for each of said punches and its associated magnet, extendable within said bail opening upon energization of said magnet to couple said bail and the punch corresponding to said interposer for reciprocation in response to energization of its associated magnet, and means operated in response to movement of said frequency doubling mechanism and including an over-center linkage for restoring said extended interposers after magnets associated therewith have been de-energized.

References Cited in the file of this patent UNITED STATES PATENTS