US1543906A - Telegraphic receiving apparatus for producing punched tape - Google Patents

Description

Jun; 30, 1925.

F. G. CREED TELEGRAPHIC RECEIVING APPARATUS FOR PRODUCING PUNCHED TAPE Filed June 18, 1923 3 Sheets-Sheet 1 June 30, 1925. 1,543,906

- F. G. cREED TELEGRAPHIC RECEIVING APPARATUS FOR PRODUCING PUNCHED TAPE File June 192s 5 Sheets-Sheet 2 June 30, 1925. 1,543,906

v F. G. CREED TELEGRAPHIC RECEIVING APPARATUS FOR PRODUCING PUNCHED TAPE il 'June 18. 1925 5 Sheets-Sheet 5 Patented June 30, 1925.

FREDERICK GEORGE CREED, or oRoYnoN, ENGLAND.

TELEGRAPHIC RECEIVING APPARATUS FOR PRODUCING PUNOHED TAPE.

Application filed June 18, 1928. Serial No. 646,100.

To all whom it may concern:

Be it known that I, FREDERICK GEORGE CREED, a subject of the King of Great Britain and Ireland, residing at Croydon, in the county of Surrey, England, have invented Improvements in or Relating to Telegraphic Receiving Apparatus for Producing Punched Tape, of which the following is a specification.

In the specification of Letters Patent No. 1,452,793, there-is cciving apparatus adapted for reproducing, as perforations in a tape, signals transmitted according to the Wheatstone-Morse code as used inland telegraphy, wherein the dots and dashes are represented by electric impulses of the same polarity but of different duration.

In cable code however the dots and dashes of the Morse code are represented by. positive and negative impulses of the same duration.

Now the resent invention has reference to telegraphic receiving apparatus (hereinafter called a cable receiver) adapted to reproduce as perforations in a tape, signals according to the Morse cable code and it has for its object to provide a receiver of this kind of simple and effective construction and adapted to translate and punch what is known as block signals, that is to say, positive or negative signals that run or blend one into the other.

For this purpose, in a cable receiver according thereto, there are used in conjunction with a tape feed wheel adapted to be moved forward at a rate, as nearly as possible in synchronism with the telegraphic transmitter, two punches that are selectively operated under the control of non-polarized and polarized relays and subject to the positive and negative electric impulses being received, and punch operating means adapted to be connected to and disconnected from a constantly running shaft through starting and stopping mechanism and comprising a punch selector, the punch operating mechanism being under the control of the non-polarized relay and the punch selector under the control of the polarized relay. Associated with the feed wheel .is a correcting wheel and a correcting rod simidescribed telegraphic re-.

'to cause one lar to the corresponding parts employed in the telegraphic receiver described in the said former specification and for a similar purpose but only one correcting wheel and corrector rod is, in the present case, necessary. The arrangement described is such that for each rotation of the shaft used for operating the punch operating mechanism, the feed wheel acts to move forward the tape through a distance equal to that centres of two adjacent feed holes in the tape, that the starting and stopping mechanism is released under the action of the nonpolarized relay each time a signal is received, Whether it be a positive signal or a negatlve signal, to enable the punch operating mechanism to be brought into action punching operation and one feed wheel correcting operation to take place, and that the punch selector is moved laterally in one direction by the polarized relay, under the action of a positive impulse, to enable one punch to be actuated to perforate the tape at one side of the central row of feed holes, and to be moved in the opposite direction, under the action of a negative impulse, to enable the other punch to be actuated to perforate the tape at the opposite side of the central row of feed holes, the punch selector, after being moved into either position by a positive or a negative impulse, remaining in that position during the reception of successive impulses of the same polarity, so as to enable successive perforations to be made in the tape at the same side of the row of feed holes by the corresponding punch, and only moving into its opposite position, to enable perforations to be made in the tape at the opposite side of the central row 0 feed holes by the other punch, when the polarity of the impulses is reversed. From the fore oing description, it will be understood t at the punch operating mechanism 'will be actuated under the control of the non-polarized relay andstarting and stopping mechanism, each time a signal is received, whether such signal be a positive or a negative one.

A'cable receiver embodying the, invention can be variously constructed.

In the accompanying illustrative drawside elevation, partly in secings, Fig. 1 is a between the tion, Fig. 2 a plan and Fig. 3 an end view, showing one construction of cable receiver embodying the invention. Figs. 4 to 9 are views showing details of the cable receiver to a larger scale. Fig. 10 is a wiring diagram showing the relay arrangement used for controlling the cable receiver.

In the example shown, a is the tape feed wheel and b the corrector wheel fixed on a spindle a driven through a friction coupling 0? and worm gearing e from the main driving shaft 7 of the receiver. m is the corrector rod designed to co-act with the corrector wheel I) for adjusting the rotary position of the feed wheel a in known way. 9 and h are the two punches mounted to slide in a punch block 11 and the rear ends of which are respectively provided with notches g and it '(Fig. 5), j is a spring blade fixed at one end to a stationary part of the apparatus and having its other and free end extending into the notched ends of the punches to form a yielding stop to limit the backward motion of the punches, it (see Figs. 4, 5 and 6) is a reciprocating bar carried by pivoted links 0 and p (Fig. 1) and provided at its front end with oppositely projecting ribs n and 42 arranged to extend into the notches g and k of the punches and to engage the rear end walls thereof when the bar is moved backward after a punching operation, the notches being of such length that the ribs cannot, in their forward movement, abut against theforward ends of the notches. The punch selector consists of a pin 1" (Fig. 9) mounted to move transversely in a hole 8 in the forward end of the bar n (Figs. 4, 5 and 6) and connected laterally by a rod or link t to the tongue at or equivalent movable part of a relay 0) so that it will be moved in one direction when a positive impulse is received and in the opposite direction when a negative impulse is received. The punch selector is formed at its end portions with recesses 1' and r and at its central portion with a forward projection 1' having a flat face. As will be seen, the arrangement is such that when the punch selector is pushed endways by the relay 0 so as to bring the projection r behind punch g and the bar it is moved forward, the said punch will be caused to make its operative stroke and punch a hole ,in the tape, the punch h remaining at rest, and when the bar n moves back, its rib n will, by engagement with the rear end of the notch g in the punch 9, move back this punch. A similar action will take place with reference to the punch 71. when the pro'ection 1' is moved behind that punch and t e bar 11. is moved forward and backward. The spring j serves to prevent the punch that is for the time being inoperative, from being moved back by friction withthe bar n, to such an extent as would prevent the projection r on the main driving shaft f. The rotar punch selector r passing behind it when necessary. The bar n is reciprocated by a rotary cam device 10 constructed and arranged in a similar manner to the rotary cam device described in the said former specification for actuating the punchesand correcting rods used in the telegraphic receiver described in that specification. For this purpose the link 0 carrying the rear end of the said bar it may be provided with a roller 0 engaging the cam groove w in the cam device to. The other cam groove w is engaged by-a roller 1" on a pivoted arm 1 to which the rear end of the 'corrector rod 'ml is jointed. The said cam device is adapted to be rotated by a spindle 2 which is driven through a spring safety device 3 by a driving shaft 4 which is driven through gear wheels 5 from the cam de-" vice w may however, if desired, e rotated from the main driving shaft'through a fric tion clutch in a manner, similar to that in which the rotary cam device described in the said former specification is driven. The rotary motion of the cam device w, is controlled by starting and stopping mechanism, including an escapement de .ice, that may be similar to that used in the said former apparatus, and controlled by the non-polarized relay, the escapement device however being adapted to allow of one complete revolution of the cam device at each reception of a signal, instead of only .half a revolution as in the former apparatus.

In the example shown, the escapement device comprises a three armed pawl 6 (Fig. 7 pivoted on a pin 7 within a recess 8 in a sleeve 9 attached to the cam device w and surrounding a ratchet wheel 10 fixed to the spindle 2, and a rod 11 connected to the tongue 12 of a relay 12. The pawl 6 is held out of engagement with the ratchet wheel 10 by the engagement of the pawl arm 6 with the adjacent end of the rod 11 but upon the receipt of a positive or negative signal, rela 12 will momentarily withdraw the rod 11 rom the pawl arm 6" and the pawl 6 will be caused to engage the ratchet wheel 10, under the action of its spring 13, so that the pawl, sleeve 9 and cam device w will be caused to make one revolution whereupon the pawl arm (5 will be re-engaged by the rod 11, which will have been returned to its normal position, and the pawl thereby disengaged from the ratchet wheel and the motion of the cam device w arrested. This action will take place each time a positive or negative impulse is received.

The two relays v and 12 are preferably double acting power relays, conveniently of the kind described in the specification of another application for Letters Patent Serial No. 497,459 arranged, as diagrammatically shown in Fig. 10, under the control respectively of an ordinary polarized relay '0 and an ordinar nonpolarized relay 12 these two relays eing under the control of a neutral line relay 14 and connected to a split battery 15. As will be seen, with this arrangement, the non-polarized relay 12*" will be operated by both positive and negative signals and the relay 12 thereby operated to positively move the rod 11 from and toward the pawl 6 each time asignal is received. The polarized relay '0 will however operate the relay '0 to move the link if and punch selector r in one direction only on the reception ofa positive signal and in the opposite direction only on the reception of a negative signal.

As will be understood, with the arran ment hereinbefore described, when block signals are being received, the punch selector 7* will be held in one or other of its two lateral positions by its controlling relay 4), under the control of the polarized relay v and the rotary cam device to will continue to revolve and the corresponding punch be caused to reciprocate, until the signals of the same polarity cease. For instance, if a block signal be received, equal in duration to four correctly punctuated signals, then the rela 12 underthe control of the non-polarized relay 12, will be held over for a corresponding length of time and the cam-will make four complete revolutions so that the corresponding punch g or it will be caused to form four perforations in the tape at one side of the row of feed holes therein whereupon the replay 12 will be caused to act to arrest the cam device until signals of one or other polarity are again received.

The relative speeds of the feed wheel spindle 0 and rotary cam device to are such that the tape will be fed forward a distance equal to the pitch of the feed holes therein for each rotation of the cam device, but will of course be fed forward when no signals are received, spaces being then left between the letters and words represented by perforations in the tape.

shaft through starting and driving mechanism and comprisinga punch selector, the punch operating mec anism being under the control of the non-polarized relay and the y be articulated or run .reciprocated by a punch selector being under the control of the polarized relay, the arrangement being such that the punchoperating mechanism will be brought into action to punch a hole 01' holes in the tape, under the control of the non-polarized relay, whenever a positive or negative impulse is received, and that the punch selector will, under the control of the polarized relay, be moved in one direction upon the reception of a positive impulse and in the opposite direction upon the reception'of a negative impulse, the punch selector remaining in one or other position during the reception of successive'impulses of the same polarity, substantially as described for the purpose set forth.

2. A cable receiver according to the preceding claim, wherein the punch operating mechanism is reciprocated by a rotary cam device controlled by starting and stopping mechanism under the control of' the nonpolarized relay, the arrangement being such as to allow of one complete revolution of the cam device for each impulse received and through successive impulses of the same polarity, whether such successive impulses together, or not, substantially as described.

3. A cable receiver,

according to claim 1, wherein the punch operating mechanism is rotary cam device provided with a pawl device that is under the control of the non-polarized relay and is adapted when released by the operation of such relay, to engage a ratchet wheel on a constantly rotating shaft for the purpose of rotating the cam device through one revolution for each impulse received and through successive revolutions during the reception of successive impulses of the same polarity, whether such successive impulses be articulated or run together, or not, substantially as described.

'4. A cable receiver according to claim 1, wherein the punch operating mechanism is reciprocated by a rotary cam device that is adapted to be rotated from a constantly rotating driving shaft through a friction device and to be stopped by an escapement device under the control of the non-polarized relay, the arrangement being such as to allow of one complete revolution of the cam device for each impulsereceived and through successive revolutions during the reception of successive impulsesof the same polarity, whether such successive impulses be articulated or run together, or not, substantially as described. l

5. A cable receiver according to claim 1, whereinthe punches have notched rear ends and the punch selector for selecting the punch to be reciprocated, consists of a recessed pin that is-carried by a reciprocating punch operating-rod or bar and is connected to a movable rod or link under the lit) control of the polarized relay so that it will be moved in one direction, to engage one of the punches, under the action of a positive impulse, and in the opposite direction to engage the other punch under the action of a negative impulse, the punch operating rod or bar being adapted to engage, on its return movement, the notched end of the punch last operated and retract it, substantially as described. 10

Signed at London, England, this eight day of June, 1923.

FREDERICK GEORGE CREED.

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