US3040610A - Perforator for tapes with punches controlled through electromagnets - Google Patents

Perforator for tapes with punches controlled through electromagnets Download PDF

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Publication number
US3040610A
US3040610A US821961A US82196159A US3040610A US 3040610 A US3040610 A US 3040610A US 821961 A US821961 A US 821961A US 82196159 A US82196159 A US 82196159A US 3040610 A US3040610 A US 3040610A
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US
United States
Prior art keywords
coil
armature
current
punch
perforator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US821961A
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English (en)
Inventor
Svidercoschi Virginio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Srl COGERA GENERAL Cia
Srl COGERA GENERALE RAPPRESENTANZE Cia
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Srl COGERA GENERAL Cia
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Application filed by Srl COGERA GENERAL Cia filed Critical Srl COGERA GENERAL Cia
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Publication of US3040610A publication Critical patent/US3040610A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars
    • H04L17/08—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars combined with perforating apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/808—Two tool pairs, driver for one pair moves relative to driver for other pair
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8765—Magnet- or solenoid-actuated tool
    • Y10T83/8766—Tool movement modifies actuating circuit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y10T83/8843—Cam or eccentric revolving about fixed axis

Definitions

  • an electromagnet wherein the means for the return of the armature after perforation are not constituted by a spring but by a force which is exerted upon said armature, while the latter is displaced to perform the perforation, whereby the force does not hinder to an appreciable extent the rapid displacement of said armature.
  • said return force is such as to be initially, during the displacement of the armature in the sense that operates the perforation, not only smaller than the force causing said displacement, but also decreasing with a certain rapidity, while said force causing the displacement that brings about the perforation proceeds to grow rapidly.
  • the perforator for tapes according to the invention is characterized in that it comprises a series of electromagnets, each of which performs the perforation with a punch directly connected to its own armature, the return being obtained by electromagnetic means which preferably start action towards the end of the working stroke of said armature, exerting thereupon a decreasing force of attraction.
  • FIGURE 1 there is indicated diagrammatically a perforator equipped with eight punches which serve for the perforation of service signals, and with a ninth perforator which perforates the so-called dragging track.
  • the perforator comprises essentially a perforating matrix 1 with a slot 2 within which there comes to slide the tape 3 to be perforated (see vFIG. 2).
  • Each punch 4 as will be described hereinafter, is connected directly to the armature of one of the electromagnetic device, generically indicated by 5.
  • the following explanation relates to any one thereof, all the other being completely identical in structure as Well as in operation.
  • Each electromagnetic device 5 comprises a core 6 of soft iron in the shape of an E on the extreme extensions 7 and 9 whereof there are placed two coils 10 and 11.
  • FIGURE 3 indicates diagrammatically the attachment of said punch 4 to said armature 12; it shows that the punch 4 is accommodated in a slot of the armature.
  • the working coil 10 which causes the perforation is connected to a source of current through a contact 16. On closing said contact 16, an electric current of adequate intensity passes through the coil 10.
  • a force is generated thereby which acts upon the arm 13 of the mobile armature, thereby compelling said armature to turn around its fulcrum in such a way that said arm 13 approaches the core of said coil 10.
  • An insulating plate 17 is carried by the arm 13 thereby preventing a direct contact between the arm 13 and the core of the coil.
  • the end of its arm 14 permits the closure of a con tact 19 which sends the current of the source to the coil 11 so that this second coil becomes energized and there is exerted a corresponding magnetic return force upon the arm 14 of the armature 12.
  • the contact 16 If, however, when the perforation has been terminated, the contact 16 is re-opened, the force generated by the coil 11 returns said armature to its rest position; in performing said return movement, the end of the arm 14 causes again the opening of the contact 19, and thereby interrupts the energization of the coil 11.
  • the arm 14 of the armature 12 rests in its rest position on the core of the coil 11 through an insulating plate 18 similar to the plate 17 on the arm 13 but thinner.
  • the invention also provides an embodiment adapted to moderate considerably the braking action of the coil 11. Said braking action in fact becomes substantial when the intensity of the current in the coil 11 has attained the stationary value, a certain length of time after the closing of the contact 19. Said length of time is greater than the so-called time constant of the coil 11 and increases with the increase of said time constant.
  • the coil 11 can be dimensioned in such a way that its time constant T is substantially greater than the time interval between the closing of the contact 19 and the arrival of the armature 12 at the end of stroke under the action of the coil 10.
  • T 51 that is, the time constant T of the coil is five times the time t From the course of the current as a function of time one realizes instantly that the .value I attained by the current in the coil 11 at the end of the active stroke of the armature, is in that case really negligible if one considers moreover that the gap at the coil is a maximum at that time.
  • the coil 11 is energized permanently by a weak current, through a resistor 21 according to the diagram indicated in FIGURE 4.
  • the armature 12 starts its movement soon, being attracted by the coil 10 and, therefore, there very soon occurs the so-called anchor efiect, owing to which the current diminishes in the coil 10.
  • the punch 4 controlled by the anchor 12 strikes against the paper tape 3 to be perforated with an energy which may be insuificient for perforation: at that time, when the armature stops, the anchor effect ceases and, therefore, the intensity of the current in the coil 10 begins to rise again, whence after some instants the perforation is finally performed, So at least part of the kinetic energy stored by the armature and by the punch is wasted.
  • the intensity of said current in the coil 10 comes to be such as to cause the rotation of the armature 12 thereby overcoming the opposition of the coil 11 due to the rest current: on starting said rotation, the anchor effect occurs, it is true, but, since the current in the coil 10 is by now suificiently high, the punch 4 arrives at the paper tape 3 with an energy suflicient to perform the perforation. It should be noted that in the present case (with rest current in the coil 11) the whole energy of the punch 4 becomes available to perform the perforation of the paper while in the case in which there is no rest current in the coil 11, the punch 4 comes to stop upon contact with said paper, losing inpractice its energy and it has, therefore, to perform the perforation by starting again from standstill.
  • FIG. 2 there is diagrammatically represented the electromagnetic device for the transport of the tape
  • two rolls 22 and 23 between which there is dragged the tape 3
  • a toothed wheel coaxial and rigid with the roll 22
  • a thrust pawl 25 which is hinged at the armature 26 of the dragging magnet 27 and is adapted to mesh between the teeth of the wheel 24, while a stop 28, rigid with the support of the magnet 27 is adapted to limit the stroke of the pawl 25;
  • a spring 29 serves to prevent the opposed rotations of the roll 22.
  • the pawl 25 causes the roll 22 to perform a partial revolution. As a consequence thereof, the latter, in cooperation with the roll 23 pressing towards the roll 22, determines a displacement of the tape 3 gripped between the two rolls.
  • a perforator for tapes comprising a plurality of punches having tape-perforating ends, a separate electromagnetic device for each punch, each electromagnetic device comprising acore having a central portion and two opposed extensions, an armature swingably mounted upon said central portion and having two opposed arms extending adjacent said extensions, a separate coil upon each extension, means operatively connecting an end of one of said arms to a separate punch, a contact connected with an end of one of said coils, another contact connected with an end of the other one of said coils, means conductively connecting other ends of said coils to a terminal of a source of electrical energy, means conductively connecting said contacts to another terminal of the source of electrical energy and pennasaid one coil.
  • insulating plate carried by said one arm and adapted to the third-mentioned means comprise a resistor connected engage said one coil when said one arm is attracted by to said other terminal and to said other contact. said one coil to actuate the punch, and means connected with said other contact and actuated by said otherarm 5 References Cited in the file of this Patent for closing said other contact and thereby fully energizing said other coil after said one arm has been attracted by UNITED STATES PATENTS 2,757,732 Worden et a1. Aug. 7, 1956

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US821961A 1958-06-23 1959-06-22 Perforator for tapes with punches controlled through electromagnets Expired - Lifetime US3040610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT591680 1958-06-23

Publications (1)

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US3040610A true US3040610A (en) 1962-06-26

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ID=11120759

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US821961A Expired - Lifetime US3040610A (en) 1958-06-23 1959-06-22 Perforator for tapes with punches controlled through electromagnets

Country Status (4)

Country Link
US (1) US3040610A (it)
CH (1) CH375550A (it)
FR (1) FR1227983A (it)
NL (1) NL240483A (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491940A (en) * 1967-05-22 1970-01-27 Robert E Sayles Tape punch computer apparatus
US3695130A (en) * 1971-09-14 1972-10-03 Olivetti & Co Spa High velocity press
US3730039A (en) * 1971-09-14 1973-05-01 Olivetti & Co Spa High velocity press
US11067240B2 (en) 2012-08-21 2021-07-20 S.V.V. Technology Innovations, Inc. Optical article for illuminating building interiors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757732A (en) * 1950-12-29 1956-08-07 Gen Motors Corp Apparatus for cutting tubing

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757732A (en) * 1950-12-29 1956-08-07 Gen Motors Corp Apparatus for cutting tubing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491940A (en) * 1967-05-22 1970-01-27 Robert E Sayles Tape punch computer apparatus
US3695130A (en) * 1971-09-14 1972-10-03 Olivetti & Co Spa High velocity press
US3730039A (en) * 1971-09-14 1973-05-01 Olivetti & Co Spa High velocity press
US11067240B2 (en) 2012-08-21 2021-07-20 S.V.V. Technology Innovations, Inc. Optical article for illuminating building interiors
US11739898B2 (en) 2012-08-21 2023-08-29 S.V.V. Technology Innovations, Inc. Optical article for illuminating building interiors employing reflective grid panel

Also Published As

Publication number Publication date
CH375550A (it) 1964-02-29
FR1227983A (fr) 1960-08-26
NL240483A (it) 1900-01-01

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