US1481153A - Means for producing a perforated tape by electric-current impulses - Google Patents

Description

, G. J. J. RQSENDAHL MEANS FOR rnonu'cme A PERFORATED TAPE ,BY ELECTRIC cunasm: IMPULSES Filed April 10'; 1922 '2 Sheets-Sheet 1 Inu zrytorzimam Juuus Fonnuua RoSENDAHL .Fan; 15 1924. 1,481,153

G. J. J. ROSENDAHL MEANS FOR PRODUCING A PERFORATED TAPE BY ELECTRIC CURRENT IMPULSES Filed Apr i1 1O 1922 2 Sheets-Sheet 2 i"; we i; 23 t2 luvsmoa actuation of the punches and the feeding- Patented Jan. 15, 31%24.

- UNHTED stares (RUNNER JULIUS JOHANNES ROSENDAHL, 0F NEWCASTLE-ON-TYNE, ENG-LAND.

MEANS FOR PRODUCING A PERFORATED TAPE BY ELECTRIC-CURRWT IMPULSFS.

Application filed April 10, 1922. Serial No. 551,280.

To all whom it may concern:

Be it known that I, GUNNER Jrnirns JoHANNns ROSENDAHL, of Gosforth, Newcastle-on-Tyne, England, a subject of the King of Denmark, have invented certain new and useful Improvements in or Relating to Means for Producing a Perforated Tape by Electric-Gurrent impulses, of which the following is a specification.

lhe. invention relates to telegraphic receiving apparatus of the kind employed particularly in theWheatstone Morse system and adapted to produce by means of signal currents transmitted to the line, a perforated tape which is a duplicate of that used at the transmitting station, said tape being fed step-wise positively by a feed wheel synchronously with the punching of the tape, and wherein two electric current impulses are required for the production of a signal, namely a positive and a negative one, these impulses energizing electromagnetic devices which in turn control the actuation of the punches and the feed of the tape.

. According to the Wheatstone system two current impulses arereq'uired, for instance a positive one and a subsequent negative one or vice versa, for the formation of a signal, but the present invention is applicable not only to the Wheatstone system but also to other systems using signal currents which are transmitted at intervals of time having a certain constant value or a multiple thereof.

The object of the resent invention is to provide a simple and reliable apparatus of this character, the design also providing for complete accessibility of the parts for repairs and renewal.

The apparatus according to the invention is chiefly characterized by the fact that the of the tape is controlled by vfriction clutches mounted inseries on a continuouslyrotating shaft, two of said clutches serving to operate each punch and one being controlled by an electromagnetic device energized by the positive impulses, and the other by a similar device energized by the negative impulses, in such manner that they are rendered operative upon -energizat1on of the appurtenant electromagnetic device. A'third clutch is adapted to control the feed of the tape, this clutch normally operating the tape feed media nism and being so operatively connected to the adjacent aforesaid pair of recording clutches that it is stopped to 3f.- fect discontinuation of the tape feed during the punching of the tape.

An embodiment of the invention is illustrated in the accompanying drawings in which Fig. 1 is a sectional end view of the ap paratus on the line fi -A of Fig.2.

Fig. 2 is a plan view of the apparatus.

. Fig. 3 is a sectional detail view on the line BB of Fig. 2 showing mainly one of the punching devices.

Fig.4 is a side elevation of the apparatus, the mechanism for punching and feeding the ribbon being removed and Fig. 5 shows a portion of a perforated tape.

Referring to the drawings, 1 designates the main shaft suitably supported at the ends by bearings 2, 2 andon which are mounted in series the three clutches 3, a and 5, the clutch members 3 and 4 being adapted to control the recording of the negative and positive impulses respectively, that is to say, the clutch member 3 controls the punching of one row of holes in the. tape and the other clutch member 4 the punching of the other row of holes on the opposite side" of the centre line of the tape which is provided with equidistant feed holes while the third clutch 5 serves to control the -feed of the tape.

The clutch member 3 consists of a spiral spring 6 wound on the shaft 1, one end of said spring having secured thereto or integral therewith an abutment or projection 7, and the other end being provided with two adjacent. cams 8, 9 which are relatively offset. The second clutch member 4 is identical inconstruction and operation with the member 5 having adjacent cams 8, '9 and an abutment 7*, but the cams are advanced to the extent of 180 with respect to the cams 8, 9, and the convolutions and position of the cams are reversed so that the I with the shaft" until a stop or detent is brought into engagement with the abutment, this causing the tension of the coils to be released with consequent stoppage of the clutch on its shaft. Inversely, an ob struction against rotation applied to the other end of the spring will tend to tighten the clutch on its shaft.

The abutment 7 on the clutch 3 is normally engaged by one end of a detent 13 pivoted at 13 and carrying at the other end an armature 15 actuated by an electromagnet 17 which is energized by the negative signal impulses, and the abutment 7 of the other recording clutch 4 is similarly engaged by a detent 14 carrying an armature 16 actuated by an electromagnet 18 energized by the positive signal impulses. The detents are under the influence of springs 13 tending to hold them in engaging position. The cams 8, 8 on the clutches 3, 4 are designed to each actuate a double armed rocker 20, 21 each fixed on a separate spindle 55, 55 carried by bracket 53 and each of said rockers serving to actuate a punch for perforating the tape,

one arm 20 of each rocker (Fig. 3) having detachably connected-to it a punch 23, 24 working in bores in the bracket 53, the tape being fed by means of a conventional form of feed-wheel 28 which engages feed perdisposed centrally along the tape.

forations 51 designates the tape which passes in front of the punches between two die plates 54 and the face of the bracket 53, and thence onto the feed wheel 28.

It will be seen that the cams 8, 8 acting on the arms 20, 20* of the rockers will produce the desired reciprocating movement of the punch, one revolution of the shaft 1 causing the punch to punch the tape once.

The other cams 9, 9 both co-operate with and are adapted to move a lever 30 pivoted at 36 into engagement with the abutment 7 of the feed-clutch 5 with a view to stopping the latter and thus stopping the feed of the tape during the punching operation. The cam 12 on said feed clutch operates a double armed rocker 31 pivoted at 32 and carrying a spring influenced pawl 33 which coacts with a ratchet wheel 34 fixed to the spindle 35 car g the feed Wheel 28. An adjustable stop 60 is provided to ensure the ratchet wheel being rotated to the extent of one tooth only at a time, i. e. the tape is fed forward to the extent of one feed erforation at each revolution of the sha 1.

The lever 30 engages at one end the cams 9,. 9, (Fig. 4) and-is adapted to be rocked by one of said cams, in the case of a dash, or both simultaneously in the case of a dot as the case may be, this end of the arm bein held in engagement with both cams 9, 9* y a spring 37 housed in a bracket 38; the other end of the lever 30 engages in a slot in a detent 39 slidably mounted in a bracket 4:0 and normally disengaged from the abutment 7" but adapted to be engaged therewith during rotation of either of the cams 9, 9 prior to and during the punching of the tape.

In operation the shaft 1 is driven at a speed slightly higher than that of the corresponding shaft of the transmitting apparatus in order to allow the clutches to return totheir starting point before the next signal arrives. The clutch 5 during such rotation of the shaft rotates with the latter and consequently the feedwhcel 28 for the tape is driven by cam 12 through the members 31, 33, 34, 35. The recording clutches 3, 4 are normally held stationary by engagement of their abutments 7, 7 by the relative detents 13, 14, but upon one of the electromagnets 17, 18 being energized by an electric impulse through a condenser in the circuit the corresponding armature 15 is attracted and thus the detent retracted so that the corresponding recording clutch is released and immediately rotates with the shaft. The electro-magnets energize by means of a keyboard, not shown, or they may energize by some means positioned at a considerable distance from the machine depending upon the circumstances.

In due course the feed-clutch 5 is rocked by the corresponding cam 9 or 9 of the recording clutch, whereby the detent 39 is engaged with the abutment 7" so that the feed-clutch 5 is held stationary and consequently the feed of the tape is discontinued. The appurtenant punch- actuating lever 20 or 21 is then operated by the corresponding cam 8 or B of the recording clutch whereby the punch is caused to perforate the tape and is then returned to its original position, the detent being returned to re-engage the controlling clutch simultaneously wit-h the punching operation. As soon as the punching operation is finished the feed-clutch 5 is released by its controlling lever 30 so that the feed of the tape is continued.

Fig. 5 illustrates a section of tape of the kind employed in the machine, this tape having a central row of feed perforations 62 with which the feed wheel 28 engages. This section of tape is shown by way of example as having been punched with a dot and dash signal representing the letter a. The punched holes 63, 64 represent as usual the dot and the holes 65, 66 the dash, the holes 63, 65 being produced by a subsequent positive and negative impulse, whereupon the paper is fed forward and the subsequent positive impulse causes the hole 64 to be punched, the tape is then fed forward again and the hole 66 is punched upon the arrival of the negative impulse.

In order to provide for of the detents 13, 14 to their original posilever 30 controlling the the positive wtura tion for engagin the abutments 7, 7 after each revolution, lndependently of the spring 13", thereis mounted on each of the spindles 55, an arm 57 disposed above the detaining ends of the detents 13, 14. During rotation of the clutches 3 or 4, as the case may be, the corresponding arm 57 will be caused to descend due to the spindle on which it is mounted being turned by' one of the rockers 20, 21, so that the detent will be pressed down by the arm to the original detaining position shown, ready to engage the abutment 7 or 7. To prevent breakage .of the mechanism due to possible incorrect co-action of the arms 57 with their detents, the arms are yieldingly; mounted as by mounting them loosel on their spindles but pressing them latera ly by spring 59 into frictional enga ment with bushes fixed to the spindle. T e arms 57 may be adjusted for angularity on their spindles by means of superim osed adjustment screws 58 sup-,

ported by t e bracket 53.

Finally, it will be obvious that a quite similar system may be used in the so-called reversal system, in which, for instance, a positive current impulse roduces a dot and a nelgative current a das Also the apparatus is obviously applicable to systems in.

which there are a plurality of rows of holes above each other in the paper tape.

What I claim as' my inventionand desire to secure by 'Letters Patent of the United States is 1. In a device of the character described the combination of punches adapted to produce series of perforations in an associated tape, a continuously rotating shaft, two clutches mounted in'series on said shaft, an electromagnetic device energized by impulses of one polarity ada ted to control one of said clutches, a second e ectro-magnetic device ener 'zed by impulses of opposite polarity a apted to control the other clutch, means for normally" against rotation with the shaft, means for rendering the clutches operative to rotate with said shaft upon energization of the respective electro-magnetic device, tape feed- 1 means, a third clutch also mounted on said shaft for controllin said tape feeding means, means for norma 1y connecting said clutch operatively with the shaft to feed the tape and means for stopping said feed during the operation of the first two mentioned clutches.

2. In a device of the character described the combination with apunch adapted to produce perforations in an associated tape, continuously rotating shaft a clutch mounted on said shaft, and an electro-magnetic device ada ted to control th operagtion of said clutc on energizationb electric impulses, said clutch-comprising a, spring restraining said clutches wound on the shaft and tending to rotate therewith,- an abutment carriedby one end of said sprin a cam carried by the opposite end of said sprin and adapted to operate the unch, and a etent normally engaging sai abutment and adapted to be operated by the electro-magnetic device.

3. In a device of the character described, the combination of punches adapted to produce series of perforations in an associated tape, a continuously rotating shaft, two clutches mounted in series on said shaft, an electro-magnetic' device energized by positive impulses adapted to control one of .said clutches and a second electro-magnetic device energized bly negative impulses ada ted to control the ot er clutch,eac of the a oresaid' clutches comprising a spring wound on the shaft and tending to'rotate therewith, a cam at one end of the spring adapted-to operate a punch, an abutment at the other end of the s ring, a detent normall engaging said a utment to hold the clutc stationary, but adapted to be actuated by the respective electro-magnetic device on, its enengization, to cause the clutch to grip the shaft and rotate therewith, whereby the cam actuates the punch.

4. In a device of vthe character described theeombination of punches adapted to produce series of perforations in an associated tape, a continuously rotating shaft, two clutches mounted in series on said shaft, an electro-magnetic device energized by impulses of one polarity adapted to control one of said clutches, a second electro-magnetic device energized by impulses of op o site olarity adapted to control the ot er clutc means for normally restraining said clutches against rotation with the shaft, means for rendering the clutches operative punchm operation, and to release said clutch or actuation of the tape feeding means at other times.

In witness whereof I have'signed this specification in the presence of two witnesses.

mm mmus Joairrrs nosrmumn.

10k .to rotate with said shaft upon energization' I

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