Patent GB-191505017-A (GB)
Title: Improvements in and relating to Automatic Telegraph Transmitters.
Inventor: BARONIO ANGELO CIPRIANO
IPC: H04L15/18
Filed: 1915-03-31
Abstract: 5017. Baronio, A. C., and Wood, K. L. March 31. Automatic telegraphs.- Relates to automatic transmitters for sending cable or Wheatstone signals, the improvements comprising means whereby (1) both kinds s of signals can be sent by the same apparatus with slight alterations, (2) the peckers are positively returned after they have entered a perforation, (3) the position of the peckers is readily adjustable in all directions, and (4) the phase relationship between the tape feedwheel, the driver cam or cams which cause the commencement of the signalling - current, and the detent-release device which determines the duration of the signalling- current, may be adjusted. In the transmitter shown in Figs. 1 and 2 as adapted for sending cable signals, the tape a is fed by a wheel d over a slotted table c, and the peckers m, n, pivoted in levers q, r, are provided with rollers 13, which normally rest above the inclined ends 29 of the contact selectors 14, 15 mounted to slide in vertical slots in brackets 20, 21. The ends of the selectors 14, 15 co-operate with contact levers 31, 32 carrying signalling- contacts 34. A shoulder 27 on the selectors 14, 15 is normally out of the path of a reciprocating driver 16 operated by a cam 18 on the constantly rotating shaft 19, which is geared to the feedwheel d. When the pecker n enters a perfora. tion, its roller 13 depresses the shoulder 27 of the selector 15 into the path of the driver 16, which moves it to the left, cau-ing the contact 34 to engage the lower terminal 35 against which it is held by the engagement of the spring 30 with a detent 36. During the lateral movement of the selector 15, its inclined end 29 engages the roller 13 so as positively to withdraw the pecker n from the perforation, the end 12 of the pecker being formed as part of a circ'e with its centre at the point p at which the pecker is pivoted. The contact 34 remains in engagement with the terminal 35 until -the detent 36 is raised by a pin 38, which is controlled by an adjustable cam device on the shaft 19 in such a way that the time during which the contact 34 engages the terminals 35, 40 can be varied. The lever 63, Fig. 1, operating the detent releasing pin 38 is adjustably mounted so that the amount of lift given to the detents 36 can be varied, and the pin 38 itself has an eccentric end 38x, so that the lift given to one detent may be different from that given to the other. The levers q, r supporting the peckers are pivoted on knife-edges s, t on adjustable blocks u, v, and can be adjusted vertically by screws 5 acting in opposition to springs 3. The phase relation between the shaft 19 and the feed wheel d can be adjusted by a clamping-device 49 between the gear 45 and the shaft of the feed-wheel. Cooperating with the feed-wbeel d is a roller f having central teeth cut to receive the teeth of the wheel d through the feed-holes, and also annular recesses f into which the ends of the peckers pass when they engage a perforation. The transmitter shown in Figs. 1 and 2 being for sending cable signals, the signalling-current sent by either of the levers 31, 32 is cut off after an adjustable time by the detent-release pin 38 controlled by a cam on the main shaft 19. In order to adapt such a transmitter for sending Wheatstone signals, the detentrelease pin 38 is withdrawn, the common driver 16 is replaced by two drivers acting at 180 degrees apart, the spacing-pecker is placed half a feed-space in advance of the marking-pecker, and the detent 36 controlling the marking-current is released by the spacing-selector, and vice versa, so that spacing or marking current is always connected to line. The spacing and marking selectors 14, 15 may be arranged to operate the marking and spacing detents 36x, 36 respectively by means of offset pins or bell crank levers. In the modification shown in Fig. 9, in which a single signalling contact 34 is connected to line 96 and plays between the terminals of a split battery 94, the line is normally connected to the spacing-terminal 92; but when the marking- pecker enters a perforation, the selector 15 moves the lever 32<x> so that the marking-terminal 93 is connected to line. The lever 32x is retained in this position by the detent 97 until this is tripped by a pin on the spacing-selector 14 when the spacing - pecker enters a perforation. When inaccurately perforated transmitting-strip is used, the selectors 14, 15 may be pivoted to the contact levers 31, 32, by which means one pecker is positively held out of contact with the strip until the other pecker rises through a perforation and so releases the detent restraining the first pecker.