Patent GB-191329389-A (GB)
Title: Improvements in and relating to Apparatus for Perforating Tape for Automatic Telegraph Transmitters and the like.
Inventor: BARONIO ANGELO CIPRIANO
IPC: H04L15/32
Filed: 1912-12-20
Granted: 1914-01-20
Abstract: 29,389. Baronio, A. C., and Wood, K. L. Dec. 20. Strip - perforating machines. - Apparatus for perforating paper tape for use in automat'c typewriters &c. is arranged so that one or more signal elements may be perforated at one operation, while at the same time the punch or punches for effecting the next perforating - operation are being selected. When transmitting a message consisting of alternate consonants and vowels, each represented by a signal two feed-perforations long, the consonant perforations are punched at one operation, and the vowel perforations at the next. In one form of apparatus shown diagrammatically in Fig. 1, punches 150 are operated by levers 155, each having pivoted thereto a pair of selectors 151. One selector of each pair, when operated by the corresponding magnet 2, 3, 4, or 5, is brought beneath one end of the forked consonant driver 152, while the other selector, when operated by the magnet 6, 7, 8, or 9, is brought beneath the vowel driver 153. The selectors are held by detents 154, and the drivers 152, 153 are alternately operated by cams 53, 54 on a sleeve 56, which is clutched to the shaft 1 for half a revolution each time the consonant-driver magnet 58 or the vowel-driver magnet 59 is energized. Means for feeding the tape 80, and for removing the detents 154 after the punches have been operated are actuated by other cams on the sleeve 56. In a modification, shown in Figs. 2 and 5, each selector 30 is controlled by a rod 25 sliding in one of the levers 26, 27, 28, which are pivoted on rods 44, 45, and normally upheld by springs 48, 49. The rods 25 are displaced against springs 29 by rods 22 engaged by L-shaped members 21 on the armatures 10, 11, &c. The rods 22 have heads 24 provided with inclined faces concentric with the rods 44, 45. Each of the selectors 30 moves over one of eight rods 31, resting on the horizontal arms of four bell-crank levers 36, 37, &c., which operate the punches through rods 40, 41, &c. when the levers 26, 27, 28 are depressed by cams 53, 54, 55 on the sleeve 56. The parts are arranged so that each punch is controlled by either of two selectors, carried by one of the levers 27, 28 and the lever 26 respectively. The sleeve 56 is also provided with cams 60, 61 for releasing the armature detents 18 by means of levers 63, 65 and sliding rods 66, after the operation of the punches. A feed-cam 68 on the sleeve 56 operates a lever 69 once during each half-revolution, imparting endlong movement to a rod 72 having a shoulder 75, which operates the lever 76 of a tape-feed device. A clutch-relief cam 78 on the sleeve 56 has two radial portions engaged by a spring controlled arm when the sleeve 56 is declutched from the shaft 1. In both modifications, the clutch is preferably of the form shown at 57, Figs. 2 and 5, which has a clutch lever a engaged in turn by detents m, n connected to the armatures of the driver magnets 58, 59. The lever a is. pivoted in a yoke b, loosely mounted on the shaft 1 and straddling a grooved disk c fast to the shaft. A shoe d, pivoted at e to the lever a, is held by a spring g in engagement with the groove of the disk c. A projection i on the sleeve 56 carries a pin j, which extends through a gap in the yoke and enters an open slot in the lever a, serving as a fulcrum for the lever. At the end of each half-revolution, one of the detents m, n engages the end of the lever a and thus disengages the shoe d, until the detent is released by the corresponding magnet 58 or 59. The apparatus may be used in conjunction with telegraph receiving-apparatus such as is described in Specification 29,416/12, [Class 40 (iii), Telegraphs, Electric], the selector magnets 2, 4, 7, 9 being controlled by the "dot" selector switch, and the remainder by the "dash" selector switch. By means of a suitable distributor, the first element of a consonant signal actuates one of the magnets 2, 3, and the second element actuates one of the magnets 4, 5. The distributor then engages the clutch-controlling magnet 58, effecting a half-revolution of the sleeve 56, which operates the punches selected by the previous vowel signal, releases the corresponding detents 18, and effects the feed &c. The vowel signal which follows effects a corresponding sequence of operations, including the operation of the punches selected by the previous consonant signal. When a pause occurs in the arrival of signals, the circuit of the clutch-controlling magnet alone is closed in the manner described in the above-mentioned Specification, or by a delayed switch. On the cessation of signals, the apparatus is stopped in such a position that, on restarting, the insulated brush of the distributor first makes contact with the segment corresponding with the first element of the consonant signal, by means of a notched disk on the shaft of the brush and a pin or rod actuated by the clutch detent of the operative sleeve. The apparatus may be arranged for operation by hand, the circuit of each selector magnet being provided with a key and completed through the appropriate clutch magnet. Instead of cams, the sleeve 56 may carry an insulated brush, or be geared to a shaft carrying such a brush, which makes contact as it rotates with a series of segments; or the sleeve or shaft may be provided with one or more commutators co-operating with suitable brushes, or provided with cams operating suitable contacts. The cams or equivalent devices for effecting the various operations may be carried by more than one sleeve, each with its own clutch.