Patent GB-909831-A (GB)
Title: Line spacing programming apparatus
Inventor: DANIELS GILBERT SAMUEL
Filed: 1958-11-20
Abstract: 909,831. Typewriters. PANELLIT Inc. Nov. 20, 1958, No. 37448/58. Class 100 (4). [Also in Group XIX] In a line-spacing control apparatus for a typewriter or the like wherein data is recorded in spaced areas on a log sheet, the sheet is linespaced by means which includes a brush and a programming means movable relative to each other, the latter having at least two adjacent electrically conductive tracks spanned by the brush, one track being provided with gapped segments, the gaps therein being positioned so that when the brush is opposite thereto the sheet is in a position to receive data in appropriate lines in the spaced areas thereon, and the width of the gaps is larger than the thickness of the brush. As described, the apparatus is a modification of that described in Specification 815,362, wherein data is printed on a log sheet 6 under the control of a mechanism for scanning a large number of variables and feeding signals to an automatic typewriter 2 with which is associated a line-spacing apparatus 20. The right-hand side of the typewriter is provided with a locking wheel 16 and a clutch member 17 which, when the carriage 14 returns, engages pins on a clutch member 26 on the apparatus 20, and a locking member 19 is simultaneously depressed by a pad 31 to unlock the wheel 16 to enable the feed roll 13 of the typewriter to be fed. The clutch 26 of the line-spacing apparatus 20 is secured to a shaft 24, Fig. 9, having a gear 104 in mesh with gears 106, 106<SP>1</SP> freely mounted on shafts 107, 107<SP>1</SP>, respectively, and the gear 106 meshes with a gear 133 on a reversible motor 30. Each gear 106, 106<SP>1</SP> has secured thereon a brush assembly 108 including two brushes 110, 112 which engage the faces of wheels 126, 126<SP>1</SP> having printed circuit patterns thereon, and these wheels are secured to discs 128, 128<SP>1</SP>, respectively, which are secured to gears 130, 130<SP>1</SP> fixed on the shafts 107, 107<SP>1</SP>. Thus, gears 106, 106<SP>1</SP> are mounted for rotation relative to gears 130, 130<SP>1</SP>. The gears 130, 130<SP>1</SP> mesh with drive pinions 138, 138<SP>1</SP>, respectively, which are driven by ratchet-operated means through solenoids SR-3 and SR-2. The wheel 126 has also continuous tracks on its opposite face co-operating with further brushes. The printed circuit programming wheels 126, 126<SP>1</SP> are designed to control line-spacing in the segments S1 to S4 of the log sheet 6, Fig. 2, which receive hourly data information in vertical columns under heading spaces H<SP>1</SP> to H4. Below the last segment is a space ONS in which data on abnormal variables scanned is automatically printed subsequent to the hourly recording in the segments S1 to S4. As shown, there are five concentric circular tracks or conductive areas on each wheel 126, 126<SP>1</SP>, the track 145 being interrupted by gaps at a number of points corresponding to the various lines of the log sheet 6, and the track 146 has segments, such as 150, located opposite the gaps. The tracks are arranged so that the brushes 110, 112 are supported at all times against tilting by at least two spaced tracks. Gaps in the tracks on the wheels 126, 126<SP>1</SP> co-operate with the programme control means in effecting the linespacing and phasing operations. The electric control circuit includes transducers for each process variable to be scanned, such as temperature, pressure, flow &c., sensing devices and timing, memory storage, and fault-finding apparatus, and an alarm relay. The motor 30 can be operated in either direction and is stopped by dynamic breaking in the field coil thereof. Connections between tracks on the two faces of the wheel 126 may be established by removable resilient clips to vary the line-spacing programme. Specification 807,157 also is referred to.