'7%/2a. Feb. 10, F. G. CREED 1,792,283 TELEGRAPH RECEIVING APPARATUS FOR PRODUCING PUNCHED TAPE FIG. Filed May 14, Sheets-Sheet l

Transcription

1 Feb. 10, F. G. CREED 1,792,283 TELEGRAPH RECEIVING APPARATUS FOR PRODUCING PUNCHED TAPE Filed May 14, Sheets-Sheet l FIG. INVENTOR FREDERICK. G. CREED '7%/2a ATTORNEY

2 Feb. 10, F, G, CREED 1,792,283 TELEGRAPH RECEIVING APPARATUS FOR PRODUCING FUNCHED TAPE Filed May 14, Sheets-Sheet 2 FIG. 3 rat-i-il e 70, 72) 7o 58 EEE r EC Gs HighWi-Fi-SeSASA- R, 4H 2. is ser 84 it 22 INVENQR FREDERICKGCREED / "v7%a- ATTORNEY

3 Feb. 10, F, G. CREED 1,792,283 TELEGRAPH RECEIVING APPARATUS FOR PRODUCING PUNCHED TAPE Filed May 14, Sheets-Sheet 3 A B C D E f F.G. 7 MN MAIN K INAHHHHHHH a s MAN ANSI 1. K A. B C D E A2 B2 G2 D2 INVENTOR. FREDERICK. G. CREE "(7%le ATTORNEY

4 Patented Feb. 10, UNITED STATES PATENT OFFICE FREDERICE GEORGE CREED, OF CROYDON, ENGLAND, ASSIGNOR, TO CREED AND COM PANY, LIMITED, OF CROYDON, ENGLAND EEGRAPE RECEIVING APPARATOS FOR PRODUCING PUNCED APE Application filed May 14, 1930, Serial No. 452,367, and in Great Britain April 26, This invention relates to telegraphic re producing apparatus in which signal repro ducing means is actuated by mechanical power under the control of received signals. 5. In apparatus of the class referred to distor tion or prolongation of the elements of the received signals due to line conditions or other disturbing causes frequently results in the reproduction of false signal elements. This 10 is due in part to the selective power of such apparatus to reproduce as normal elements such portions of the received signals as may be represented only by fractions of elements therein. 15 The present invention has for its main object to provide means to obviate such re production of false elements without impair ing the reproduction of weak received ele ments and whilst retaining all the advan 20 tages of the use of mechanical power. One embodiment of the invention will be described as applied to a tape perforating receiver for the production of a tape perfo rated according to the Morse cable code, but 25 it will be obvious that the invention is not limited to this, but may also be applied to a receiver perforating according to any multi ple unit code, or to apparatus in which means is actuated instead to retransmit sig 30 nals, according to any of aforementioned codes, to a second line. In the accompanying drawings: Figure 1 is a plan view showing one con struction of a cable receiver embodying the present invention; Figure 2 is a view, partly in section, taken on the line 2-2 of Figure 1; Figure 3 aside view of the receiver; Figure 4 shows a manner of constructing a O resilient link which is preferably incorpo rated in the receiver as described; Figure 5 is a sectional view of a detail, and, Figures 6,7 and 8 are diagrams for use in explaining the principle of the present in 45 vention. In the example shown, 1 is the tape feed wheel and 2 the corrector wheel fixed on a spindle 3 driven through a friction coupling 4 and worm gearing 5 from a shaft 6. 7 is 60 a corrector rod designed to co-act with the corrector wheel 2 for adjusting the rotary position of the feed wheel1 in the known way. 8 and 9 indicate two punches mounted to slide in a punch block 10 and the rear ends of which punches are inturned as shown at and indicates a spring blade fixed at One end to a stationary part of the apparatus and bearing against the inturned rear ends 11 and 12 of the punches to return them to their normal positions after operation. SO 14 indicates a reciprocating bar carried by pivoted links 16 and 18 and reciprocated by a rotary cam device 20 through a roller 22 carried by the upper end of link 18 and en gaging a eam groove 24 in the cam device The bar 14, it is to be noted, is bifurcated at the end adjacent the link 16 which projects above the bar 14 for a purpose to be herein after explained. d Working in a second cam groove 34 in the O cam device 20 is a second roller 32 carried by a pivoted link 30 to which is connected the rear end of the corrector rod 7. The said cam device is adapted to be ro tated by a spindle 35 rotated from any suit 5 able power source, such as a motor, prefer ably through a safety spring device. On the spindle 35 is mounted a gear wheel 36 with which gears another wheel 38 carried by the shaft 6 and by which connection the latter is driven from the spindle 35. This arrangement may be reversed, how ever, as will be readily understood, that is to say, the shaft 6 may constitute the main shaft of the apparatus and the spindle 35 be sub sidiary.thereto and driven therefrom in any suitable manner. The rotary motion of the cam device 20 is controlled by starting and stopping mecha nism, including any suitable escapement de vice under the control of a non-polarized re lay 40. In the example shown, the escapement de vice comprises a three armed pawl 42 pivoted on a pin 44 within a recess 46 in a sleeve 48 attached to the cam device 20 and surround ing a ratchet wheel 50 fixed to the spindle 35 and a pivoted catch 55 connected by a rod 52 to the tongue 41 of the relay 40. The pawl 42 is held out of engagement with the OO

5 ,792,288 ratchet wheel 50 by the engagement of the be operated by both positive and negative pawl arm 54 with the catch 55 but upon the signals and is thereby operated to positively receipt of a positive or negative signal relay move the rod 52 and the catch 55 from and 40 will momentarily withdraw the rod 52 and toward the pawl 54 each time a signal is re catch 55 from the pawl arm 54 and the pawl ceived. The polarized relay 66 is however 42 will be caused to engage the ratchet wheel arranged to operate to move the punch se 50, under the action s its spring 56, so that lector 58 in one direction only on the recep the pawl, sleeve 48 and cam device 20 will tion of a positive signal and in the opposite be caused to make one revolution, whereupon direction only on the reception of a negative the pawl arm 54 will be re-engaged by the signal. catch 55 which will have been returned to its The dot and dash punches are selected ac normal position, and the pawl thereby dis cording to the position of the segment 61 of engaged from the ratchet wheel and the mo the selecting bar 58, the armature of the relay tion of the cam device 20 arrested. In order 66 moving the bar 58 so that said segment 61 to prevent the device 20 from being rotated is opposite either the punch 8 or the punch 9. in the wrong direction, it is provided with On the other hand, the non-polarized relay a surface 5SE depression into which 40 moves its armature so that the catch 55 is arranged to drop a roller 59 carried by a releases the pawl 54 of the escapement device, rod 61 under the control of a spring 63, the to permit the camshaft to rotate through one depression being steep on one side but not on revolution in the time of a signal period, and the other so that rotation of the cam device actuate the punch striking mechanism about in She right direction will not be interfered the middle of the signal period through the with. medium of the link 14. This will cause the The punch selector consists of a bar 58 actuation of either the punch 8 or the punch 9 mounted to move transversely in front of the according to the position of the striking seg rear ends of the punches 8 and 9 and is pro ment of the bar 58 in the manner presently to vided, on the face opposite said punches with be described, that is to say, following a de two spaced-apart recesses 60 and 62 provid scription of Figures 6 to 8 which it is now ing a striking segment 61. The punch se convenient to proceed with. lector is connected laterally to the tongue 64 Referring to Figure 6, the vertical lines A, or equivalent movable part of a polarized B, C, D, E, etc., represent signal periods and relay 66. the full line may be taken as representing the The selecting bar 58 is preferably attached letters F. I. as transmitted by an automatic to the armature 64 of the polarized relay 66 transmitter in Morse cable code. The signals in a resilient manner so as to prevent dange will be received after transmission through to the punches. For this purpose, in the a line or cable, substantially of the form arrangement shown in Fig. 4, the selecting shown in Fig. 7. If the distances of the bar is bent as shown and the link 68, attached horizontal lines b and c, Fig. 7, from the zero to the armature 64 of the relay at one end, line a be considered as the minimum values passes through apertures in the bent portions of signal strength to actuate or to hold actu of the selecting bar. Collars 70 adjustably ated the non-polarized relay it will be seen fixed to the link 68 retain springs 72 located that the cam-shaft of the receiver will be re on either side of the extremity of the select leased at the pointed, Fig. 7, and will be ing: his arrangement 58. arrested at point E1 performing successive is advisable since the ap revolutions during the reception of the signal, aratus described enables the instrument to as shown by the periods A1, B1, C1, D1, E1 E. used for the reproduction of poorer sig in Fig. 8. The distance between the vertical nals than could previously be successfully re lines a and gy in each period represents the produced. time during which the punch is actuated as Eccentrically pivoted to the top of a ro selected by the polarized relay and selecting tatable post 74, as by a pivot 76, is a lever bar , one end of which is connected to the rod It sometimes happens, however, that a sig 52 of the relay 40 and to the opposite end of nal is prolonged by line conditions or other which is pivoted, as shown at 80, a member disturbing causes beyond the time at which 82. The member 82 is turned at its tip as * it should have terminated. This case is shown shown at 84 and slotted (see Fig. 2), the diagrammatically on the termination of the slotted portion embracing the selector bar 58 second dot in the signal I in Fig. 7; the and being slidably guided thereby in combi dotted portion of the curve representing the nation with a stationary stop or guide bar 86. distorted signal and the full line representing The eccentric pivoting of the lever 78 permits the normal termination of the signal. It will of its adjustment and of that of the member thus be seen that instead of the non-polarized 82 as will be readily apparent, the movement relay becoming de-energized at the point m. of the post 74 being conveniently effected as and arresting the motion of the camshaft by by a projecting rod the clutch pawl 54 when the point C2 is The non-polarized relay 40 is arranged to reached the relay is not de-energized before 70 S

6 1,792,288 3 point p. By this time the pawl 54 will have passed the catch 55, the camshaft will there 4. A telegraphic reproducer comprising a fore make another complete revolution, and relay, an armature therefor actuated in the as the polarized relay although now de-ener same direction for both positive and negative gized, remains in the position to which it was signals, a rotatable member adapted to be re. punched. last actuated an extra perforation would be leased and stopped under the control of said 6. armature, signal reproducing means, a mem The present construction obviates such ber adapted to be moved by said rotatable errors, and, the way is now clear to point out member to actuate said reproducing means, 10 that the segment 61 will only operate the a polarized relay to select the particular re selected punch when the tip 84 of the member producing means to be actuated, and an abut 5 82 is interposed between said segment and ment moved by the first-mentioned relay be the projecting upper end of the pivoted link tween the signal reproducing means and said 16, which latter is, of course, operated by the member at each actuation and withdrawn at s rod 14. Thus, when the non-polarized relay each release of said first-mentioned relay. 40 operates on receipt of a signal, tip 84 of 5. Telegraphic reproducing apparatus 80 member 82 is inserted between the iod 14 and comprising dot and dash punches, a bar for the selector bar 58 but when said relay returns selecting one of said punches for operation, on the completion of a signal, tip 84 of mem means for operating the selected punch, and 20 ber 82 is withdrawn in view of the connection means interposed between said operating of the latter with the rod 52 and no motion means and bar and withdrawable therefrom 85 of rod 14 can be imparted to the punches. to prevent duplicate operation of the select Hence, referring again to the example of a ed punch on the completion of a particular distorted signal in Fig. 7, it will be seen that signal, all of said parts being under the con 25 although the shaft of the cam device makes trol of the received signals. another revolution, tip 84 of member 82 is 6. A cable receiver comprising a tape 90 now withdrawn at point p, which is before wheel, a relay, a pair of punches selectable point as at which actuation of the punches under the control of said relay, a constantly would occur during that revolution of the cam running shaft, punch actuating mechanism 30 be shaft; punched. an extra punch therefore cannot now adapted to be connected to and disconnected from said shaft, a second relay controlling 95 It will be appreciated that the invention said punch actuating mechanism, and means can be variously constructed and as stated not interposed between said actuating mecha limited to the above described example of a nism and the selected punch to prevent dupli 35 tape perforating receiver. cate operation of the latter on the completion What is claimed is: s of a received signal. 1. A telegraphic receiver comprising sig 7. A cable receiver, adapted to reproduce 100 nal receiving means, a rotatable member re as perforations in a tape, signals according leased under the control of signals received to the Morse cable code, comprising a pair of 40 by said means, signal reproducing means and punches, a non-polarized relay, punch oper. means also under the control of said signals ating mechanism adapted to be brought into 03 for preventing any further effect of the con tinuing rotation of said member on said sig lay action whenever to punch a a positive hole in or the negative tape by impulse said re nal reproducing means after the cessation is received, a polarized relay, a punch selector 5 of a received signal. movable by said polarized relay in one direc 2. A telegraphic receiyer comprising a tion upon the reception of a positive impulse 0. driven member, means for releasing said and in the opposite direction upon the recep member for rotation at the beginning of each tion of a negative impulse, and a member signal, and signal reproducing means actu under the control of said non-polarized re 50 ated during the rotation of said member, se lay preventing the duplicate operation of the lected for actuation under the control of re selected punch for any particular signal. ceived signals and dependent for actuation 8. A telegraphic reproducer comprising a 115 upon said signals continuing to be received relay operated by the received signals, signal during such rotation. reproducing means, means for actuating said 3. A telegraphic reproducer comprising signal reproducing means, means for select punches selectively actuated to reproduce sig ing the particular reproducing means to be 20 nals, a rotating shaft, a punch actuating mem actuated, a second relay also operated by the ber driven towards said punches by said received signals for actuating said selecting shaft, means interposed between said actu means, and resilient means interposed be 80 ating member and said punches under the tween said second relay and said selecting control of received signals to select the par ticular punch to be actuated and means, also producing means to prevent means. damage to said signal re 25 under the control of said signals, interposed FREDERICK GEORGE CREED. between or withdrawn from between said ac tuating member and said punches. 35