US1076944A - Telegraphic perforating-receiver. - Google Patents

Description

H. BILLE.

TELBGRAPEIC PERl-OTING RECEIVER.

APPLICATION .FILED N V. 3, 1911.

s ry

Patented 0011.28, 1913.

2 SERENA-SHEET 1w j M Tatar' H. BILLE.

TELEGRAPHIC PERPOBATING RECEIVER.v

APPLIUATION rxLnn lov. a, 1911.

Patented 011128,1913.'

UNITED STATES PATENT OFFICE.

HARALD BILLE, OF COPENHAGEN, DENMARK.

TELEGRAPHIC FERIE'ORATING-RECEIVER.

Application led November 3,1911.

To all 'whom 2f may concern i.

Be it known that I, HARALD BILLE, en* ginecr, a subject of the King of Denmark, residing at Copenhagen, Denmark, have invented certain new and useful Improvements in T elegraphic Perforating-Receivers, of which the following is a full, clear, and eXact description.

'lhe invention relates to a telegraphic receiving apparatus of that kind in which the signal currents transmitted to the line cause the perforation of a paper tape, which is a true copy of a tape used at the transmitting end, this result being made possible by the present invention because of a certain relation existing between the situation of the holes in the paper tape by means of which it is fed in a step by step manner during the perforating, and the holes which are formed under control of the signal currents. Such a tape is, for instance, that used in the ,so-called Wheatstone system, in which for each signal two holes are required `which are normally situated one on each side of a middle row of holes used for the feeding, and the above named relation between the situation of the signal holes and the feed holes is generallysimply that each signal hole is found directly opposite to a feed-hole, the feed holes being equally spaced apart. According to the ordinary l/Vheatstonc system two current impulses are required, for instance a positive and a subsequent negati've one or vice versa, for the formation of a signal; but the invention can be used not only in connection with the VVheatstone system in a narrow sense, but also in connection vwith other systems using signal currents which are transmitted at intervals of time having a certain constant 1value or a multiple thereof.

In the apparatus forming the subject of the invention perforating punches which are controlled by the signal currents are used, and it is necessary that the shaft effecting the feeding of the tape on the receiver and the actuating of the punches shall runl synchronously with the corresponding shaft of the transmitter, and in the present apparatus it is a'necessity owing to the kind of the signal currents that the synchronizing shall be effected and maintained by means of all or some of the signal currents themselves, the line not being available at cer* tain times for special current impulses for causing or maintaining the synchronizing Specification of Letters Patent.

Patented Oct. 28, 1913.

Serial No. 653,319.

as is the case in other apparatuses of known kind. The signal currents proper have also previously been used for mechanically controlling thc feeding of such a tape without effecting a proper synchronizing of shafts; but this arrangement suffers from the drawbackthat it demands rather great power and consequently causes considerable wear of the parts on which depends the exactitude of the control.

rfhe accompanying drawings illustrate the invention.

Figure 1 represents a top view of the receiving apparatus; Fig. 2 represents a sectional View according to the line A-A, Fig.

l; Fig. 3 is a sectional View of the punching mechanism according to the line B-B, Fig.

l; Fig. 4 illustrates a section through the feeding mechanism according to the line GWG, Fig. l; Fig. 5 is a top view of said mechanism on an enlarged scale; Fig. 6 is a front View of the cam disk; Fi g. 7 is a detail on an enlarged scale; Fig. 8 is a diagram illustrating the working according to 1vlfheatstones system; Fig. t) shows a part of a paper slip, and Fig. 10 is a detail showing the electrical connections between' segments and rings on a synchronizing device.

A shaft a'is rotated by an electromotor b or other mechanism so as to run synchronously with the crank shaft of thc rocking beam of the transmitter and said shaft t carries a drum or a plane disk c having three cams cl, e and f, Figs. l and 6, for acting upon the three punches and the paper feeding device. In the path of the cam d is found the roll g on the rod 7L, Figs. l and 3, which by means of a spring 7c is pressed ir the direction of the disk. Ain alinement of the rod h is found Jthe punch t, which in a similar manner is acted upon by a spring n. The punch m carries a small turntable angle piece o (Figs. land Tl, by means of which the rod can press the punch m through the paper slip p, when the parts assume the position shown. When the punch m, has perforated thc paper slip a further slight Ymovement of the rod 7L will cause the sideward pointing small arm of the angle piece to strike against the lined stop (j. so that the angle piece is turned and slide-s away from the rod 7L, so that the punch m can be carried back by its springl (and at the same time the armature lr of the magnet s is withdrawn, see below). The position of the angle piece 0 is determined by an electromagnet s with the armature 7' of which it is connected by a rod o. When the magthis position o the parts the angle piece o is turnedV in. such a manner that the rod h does. not hit the same and thus does not a'ctuate-4 the punch m. Under the rod m and consisting of a rod 1 actuated by the cam' ldisk which takes the other parts are found corresponding ele ments lfor the :other row of holes in the paper; but out of regard to space, the' electromagnet and related parts are arranged tp theright as shown.- Between-the two punches is found a long thin punch a, Fig. 3, producing the middle row of holes serving for the feeding. This unch being connected with the rod L pr uces a hole for each revolution of the shaft a notwithstanding4 WhetherV the other punches are perforating or not.

Figs. 1, 4 and 5 show the feeding device f, which rod by means of a pawl 2 actuates a ratchet Wheel A3 on a shaft-4,' which shaft carries the feeding wheel 5. Care has been taken that the wheel, for instance by arranging. of a stopping device 6 engaging a wheel 7 can only be turned one tooth each time. vspring 8 carrying a roll 9 coacting with a wheel 10 secures the stopping of the feed wheel in the correct position in well lmownmannefr. I

Fig. 6 shows a front view'of 'the diskY c carrying the three cams, arranged in such a mutual position that the cams d iand e actuating the punches are mutually displaced 180 degrees, while the cam f is arranged in such a. manner that the. paper is fed shortly after the acting of the cam e. The cam d actuates its punch in the position of the disk c, shown in Fig. 6, whereas the cam e only becomes active after half a revolution of the place in the direction of the arrow.

Fig. 8 shows the diagram according to which the apparatus Works. 11 designates lthe'line through which arrive the telegraphic currents 'to the relay 12, which is polarized. The relayvtongue is connected with one plate of a condenser 13, the other plate of which is connected with the middle ofthe double battery 14. The other two poles of the battery are through the safety fuseslronnected to the electromagnets s and sshown in Fig. 1. To each of thetwo el'ectromagnets s and s is shunted aresistance 16 and 17. Each of the windings of the electromagnets s and .9 are at their other ends connected to one of the two contacts 15 and 19 respectively of the relay 12. On-

Vof the rela)T 12 from the Vcontact 18 to the Contact 19, the right half of the battery 14 will charge the condenser 13 through the windings of the electromagnet s whereby the armature of ythe same is attracted. Hereby the angle piece belongingfto the undermost ofthe punches is brought into the effectingA perforation when 4the roll g is.'

struck by the'cam d.

By way of example it will now be stated what takes place when the letter A consisting of a dot and a dash is'v transmitted and received. -Tlie paper slip has the aspect shown in Fig. 9. Each signal (dot or dash) ending with a negative current the e of the relay 4 12- will immediately tongu before arrival of the letter. A'rest against the contact 19. The current impulserst arriving is thus a positive one and carries the tongue of the relay agairist'da'e contact 19, whereby the armature of the electro-- magnet s brings the vangle piece o, Fig. 1, v

into its active position, so that, the-cam d when thereupon striking against the roll g, forms the hole 22, Fig. 9. Subsequentto this the negative impulse arrives and the armature of the electromagnet a causes the other punch to act when the cam e strikes its corresponding roll, and the hole 23,. Fig.v 9, is formed. Immediately thereafter thefeeding of the paper slip takes place by means of the Cam f, Fig. 6, and the subse- 'quent positive current impulse then causes the'formation of the hole 24, Fig. 9. When the cam e thereupon passes its roll, no perforation takes place, but feeding of thev paper is effected by means 'of the 'cam f, Vand thereafter the cam d likewise passes its roll Without causing perforation. On arrival of the negative im ulse belonging to the dashthe armature o the electromagnet s is attracted and the hole 25 is formed.

The working in the ri ht manner of the apparatus as above set orth' is contingent on that 'the cams d and e actuate their cor'- responding punches for a suitably short time after vthe arrival of the impulses which are to effect perforation vby means of the corresponding cams. Thisis attained when thefshaft aand the crank-shafts of the transmitter are running synchronously and with a-.distinct difference of phase depending upon the retardationof the line. An important feature lin the invention is the fact that the current impulses `proper, which cause the perforation, are used for the con trolling and maintaining of the synchro nism. According to the diagram shown in F ig. S this can be obtained in the following manner. On the shaftv a, Figs. 1, 8 and 10, carrying the disk c is arranged an ebonite cylinder 26, carrying two metallic rings 27 and 28, Fig. 10, and further a ring cut up so asto form two long and one short insulated segments (see Fig. 8). The brush 29 rubs on these segments, and the brushes 3() and 31 each on one of the rings 2S and 27 as shown in Fig. l0. They are, as indicated by dotted lines, connected'each with one of the two longer segments, with which the brushes 30 and 31 are thus constantly electrically connected. 32 and 33 are two polarized relays. each having one contact and one stop, and through suitable unsymmetrical adjustment of the armature between the pole shoes of the magnet of the relay provisions have been made for the relay tongue, when the relay is not acted upon by currents, constantly resting against the contact. The field coils of the shunt electromotor b directly coupled to the shaft a are designated by 3ft, the armature coil by 35. 36 is a starting'resistance, and 37 "the current source forA the motor. 38 and 39 are two small current indicators (milliamperemeters or tantalum lamps), 10, 11 y and 4t2 are resistances, the last one of which can be varied by hand. If everything is working all right, the spring 29 will touch the insulated short segment at the moment. when a positive current impulse arrives and has laid the/tongue ofthe relay 12 against the contact 18. It is evident that the cam l at this moment must not yet have hit its roll, as the adjustment of the piece o would then not be possible; on the contrary the cam will have to actuate its roll after the piece .o has been brought into its action position. As it cannot berelied upon that the transmitter works I absolutely regularly, neither that the motor of the receiver runs at an absolutely7 constant speed,rthe greatest Security for the right adjustment of the piece o before arrival of the cam is obtained, when the latter is backwardly displaced half a revolution, i. e. when'the disk ."5 c is placed in such a manner on the shaft of thewmotor that, for allowing the acting ofthe cam d, it will have to perform half a revolution after the above named moment `of arrival of the positive current impulse.

'Of course then the cams e and f are displaced in a corresponding manner. In practice a motor of about H. P. is used.

lVlien now the synchronism is disturbed this will have the effect that the brush 29 at the moment of arrival of a positive impulse is electrically connected either -withthe brush 30 or with the brush 31, depending on the motor running-too slow or too fast. Suppose the motor has been running a little too slow, the local positive impulse from the battery 14 leaving the condenser 13 will partly go through the brushes 29 and 30 70 and the relay 32. Hereby the tongue of the same will momentarily be' removed from its Contact, and the short circuiting caused -by the relay of the resistance 4;() and the current indicator 3S will cease, which again will 75 incur a short augmentation of the speed of the motor, the resistance 40 being arranged in series with the shunt. If, however, the motor has been running too fast, the brush .29 will be electrically connected with theso brush 31 at the moment of arrival of a positive impulse, and now the relay 83 acts in 'a similar manner, which incurs a temporary Yceasing of the short circuiting of theresistance 41 and the current indicator 39, where- 35 by resistance is inserted in the armature cir.- cuit of the motor. It can always be seen on the current indicators 38 and 39 whether the motor is inclosed to rli too slow or too fast, dependent on whether one or the other indicator most frequently shows passage of current, and a regulation of the motor can then be effected by alteration of the resistance l12which is either, as shown, permanently inserted in the shunt or in the armature circuit. From this it will be seen thatit is exclusively the local currents controlled by the signal currents' on the line vwhich maintain the synchronism. FinallyV it is clear that a quit-e similar system can be used with the soi-called reversal system, in which for instance a positive current impulse produces a dot, a negative current a dash. MoreoverV of course the invention can be used forsystems with a plurality of rows of holes above each other in the paper slip.

Having described my invention, I claim:

1. A telegraphic receiving apparatus comprising a tape perforator, and a constantly rotating motor and signal cont-rolled devices vacting together to actuate the tape perfo' rater, and means whereby the signal currents will `control the speed of the motor substantially as described.

' 2. In a telegraphic receiving apparatus, 115 the combination of a tape perforator, a constantly rotating motor, a signal-controlled means for throwing the tape perforator into and out of operative mechanical connection with the motor, and means whereby the signal currents will cause the motor to run in synchronism with the transmitter.

3. In a` telegraphic receiving apparatus, the combination of an electric motor, a continuously rotating cam disk, a plurality of punches actuated by said disk, electromagnets operated by signal currents and adapted to select the punches for actuation and a paper strip-feed operated step by step by said motor, substantially as described.

'4. In a telegraphic receiving apparatus,

the combination of an electric motor, 4acon' tinuously rotating cam disk,a plurality of punches actuated by said disk, electromagnets operated by signal currents and adapted to select 'the punches for actuation, a pazper stripv feed operated st epb Astep by 4 :said motor, and-means whereby t e'si al currents will automatically control t e speed l of the motor.

5. In a telegraphic receiving apparatus,`a. motor nA combination with a synchronizing mechanism therefor comprising A-a switch driven bythe motor, means for directing. the signal currents through the switch, two

signal currents may be Vdirected by said sw'itchlocal circuits controlled by therespective relays for increasing and decreasing'respectively lthe speed of the motor and means whereb 'du'ring the normal speed of the motor -sai relays will not be actuated,

substantially as described.

.In witness whereof, I have subscribed my slgnature, in the presencepof two witnesses.

` HARALD BILLE.

Witnessesfw VIGGo BLOM,

FLSfrUB.

'relaysnto one' the other of which the ,A

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