Patent GB-495396-A (GB)
Abstract: 495,396. Typewriters; calculating-machines. HAUSHEER, M. E. May 11, 1937, No. 13456. Convention date, May 12, 1936. [Class 100 (iv)] [Also in Group XIX] Index type-wheel machines ; hammer -impression arrangements; paper-supports ; sheet feeding arrangements.-In line-printing typewriters comprising typewheels which are set differentially by means of manuallyoperated racks, the paper to be typed upon is supported in a flat state and impression is effected by moving the paper into contact with the typewheels and operating a hammer consisting of a transverse bar. The type-wheels may be associated with the column and line totalizing-devices described below. In the machine shown in Figs. 2, 3, and 4, a carriage 4 supporting type-wheels 32 is mounted on a base 1 containing a vertically movable frame 5 supporting a flat platen 7. The carriage is normally locked by a catch 111, Fig. 4, which is releasable by means of a lever 109. The type - wheels are mounted on a stationary shaft 35 and are formed with types 33, and teeth 34 co-operating with setting-racks 41 which are supported by plates 40, 40a, and are guided by a grid 45a. A plate 44, arranged above the plate 40, carries a hinged frame 45 for retaining a sheet 187 bearing a representation of the items allotted to various columns on the sheets to be printed. The sheet 187 bears also a representation of the standard rulings. To set the type-wheels, the setting- racks are differentially displaced by applying to lugs 41a thereon a tool such as a hook attached to a rod or thimble. The setting- racks are provided with indexcharacters which are visible through a slot 46 and represent the line set on the type-wheels. To ensure correct setting, the racks are positively arrested by means of pivoted stop-bars 48, 48a which are selectively raised into the paths of the setting-racks by depressing corresponding keys 50, 50a arranged in a keyboard at the side of the carriage. The keys may have individual projections for enabling them to be distinguished by touch. Sheets and interleaved carbons are fed over the platen 7 by means of endless bands 9 which pass over sprocket-drums 10 carried by shafts 108. Rollers 13 for holding the sheets and carbons in engagement with the left-hand band are mounted in a spring- pressed bar 12 which is mounted on the frame. When it is required to remove the sheets, the catch 111 is released, the carriage is moved into rear position by a spring, pedal, or motor and the rollers 13 are automatically released by a slide 15 having an abutment in the path of the carriage, and inclines 16 co-operating with rollers 14 on the bar 12. When large sheets are employed, the carbons are attached to drums 17 driven by the sprocket-drums 10 and mounted in pivoted frames 18 which can be swung upwards to facilitate adjustment of the carbons. The initial position of the sheets is determined by engagement of the top edges with rollers 23 mounted on an arm 22 projecting from a slide 21 which is carried by the bar 12 and is adjustable by means of a finger-piece 25. A pointer on. the fingerpiece is arranged over a line-scale 29 on the base 1, and a detent on the finger-piece engages notches at the side of the line-scale. A crank 55 for operating the machine is provided with a spring-plunger 56 co-operating with an arm 58 in connection with a link 60 supported by arms 61 on shafts 62 provided with arms 63 engaging the frame 5. When the crank is pulled forward, the arms 63 raise the frame 5 and platen 7, and the sheets are moved into contact with the type-wheels. A latch 64 co-operates with a notch 65 in the link 60 to hold the platen in raised position. The plunger 56, after passing the arm 58, rocks a bell-crank latch 66 and thereby releases a spring-plunger 68 in connection with a lever 70 for swinging upwards a pivoted bar or hammer 73 to effect impression, The hammer passes through a slot 8 in the platen. On return of the crank, the type-wheels are restored by co-operation of the setting-racks 41 with abutments 88 on a rod 87 which is connected by chains 86 to winding-drums 84. One of the drums is connected to a pinion 82 gearing with a pinion 81 which gears with a pinion 74 mounted loosely on the shaft 35. A plate 75 on the pinion 74 is provided with three equidistance projections 76 for engaging a spring-plunger 77 on the crank 55. During return of the crank, the pinion 74 causes the drums 84 to rotate, and the rod 87 is traversed upwardly, the setting-racks, and consequently the type-wheels, being restored by means of the abutments 88. On completion of the traverse, a cam on the pinion 82 releases a clutch 83, and the rod is returned to normal position by means of a spring-drum 91 which actuates winding-drums 89 for chains 86a connected to the rod. To permit of repeated impressions of the same line, the abutments associated with the displaced setting-racks are swung forward. The hammer-actuating spring plunger 68 is re-set and latched, during return of the crank, by means of a lever 93 having teeth 93b for engaging one of three equidistant toothed segments 92 on the plate 75. To permit of return of the platen to normal position, the latch 64 is released by co-operation of a pin 57 on the spring-plunger 56 with an abutment 96 on the latch. Column-totalizers 124 and a line-totalizer 170, Figs. 9, 11, and 12, are mounted on rods 113, 114 and 115, 116 forming part of a frame 117, the ends of the rods 113, 114 being arranged in slots 118, 119 in cheeks 120 on the carriage 4. Each column-totalizer comprises adding-wheels 121, and carrying-wheels 122 which co-operate with teeth 133 on the top of the setting-racks 41. When the setting-racks are pulled forward to set a numeral, the adding-wheels of the associated column-totalizer are correspondingly advanced. On return of the setting- racks, the frame 117 is automatically raised to disengage the carrying-wheels by means of bell-cranks 136 which engage rollers 138 on the rods 113 and are operated by cam-notches 135 in discs 134 on the shaft 85 of the drums 84. The adding-wheels are zeroized and the totals are transferred to the type-wheels by the following means. A rocking bail 145 is formed with slots 147 engaging rollers 146 on slides 141 having pin-and-slot connection 152 with links 151 connected to a rock-shaft 148 provided with a series of projections 149 of the same width as the column-totalizers. When the rocking bail 145 is pulled forward, the carrying-wheels 122 are disengaged from the setting-racks by co-operation of inclines 154 on the slides with the rollers 138. Next, the projections 149 are rocked to move the setting-racks into zero position, and finally rollers 197 on the rods 114 ride down inclines 158 and permit the adding-wheels 121 to engage the setting-racks. Thereupon, the adding-wheels are zeroized by pulling forward a pair of connected racks 164 in engagement with pinions 159 having lost-motion engagement with a shaft 127 which passes through the adding - wheels. A zeroizing - bar 129 mounted in the shaft is moved into position for engaging projections 126 on the adding- wheels by means of projections on the pinions 159. When the racks 164 are pulled forward, the pinions are rotated, the adding-wheels are zeroized, and the setting-racks are differentially displaced to transfer the total to the typewheels 32. One of the racks 164 is provided with a single tooth for setting an asterisktype. The line-totalizer comprises adding- wheels 169, and carrying-wheels 168 adapted to engage the carrying-wheels 122 of the columntotalizers. The line-totalizer runs on the rods 116, 117 and is propelled by a spring- drum, successive positions being determined by engagement of a stop 173 on the line-totalizer with adjustable tabulating-stops 172 which are rocked by means of projections 174 on pull-bars arranged at the required columnpositions in the group of setting-racks. The line-totalizer is zeroized and the total is transferred to the type-wheels by the following means. The line-totalizer is moved towards the right to bring the adding-wheels 169 into engagement with pinions which engage a group of setting-racks. The racks are then pulled forward to rotate pinions which engage pinions 1591 controlling a zeroizing-bar 129 co-operating with projections 126 to zeroize the adding-wheels 169, the setting-racks being thereby differentially displaced to transfer the total to the type-wheels. The totalizer casing 182 is provided with a frame 183, Fig. 11, for holding a card having rulings corresponding to the columns. Line-spacing mechanism.-The endless bands 9, Figs. 2 and 3, are intermittently advanced, to line-space the sheets, by means of a pawl 105, which co-operates with a ratchet-wheel 106 on the shaft 108 of the rear drums 10. The pawl is connected by a lever 104 to a rod 103 having a projection 102 co-operating with a ratchet-wheel 101 on one end of a shaft 100 which is provided at the other end with a ratchet-wheel 99 co-operating with a pawl 97 on the crank 56. Reflectors for rendering writing visible to operator.-The parts of the sheet near the printing line are viewed by means of periscopic mirrors 31, Fig. 3. The sheet is illuminated by means of a window, or a tubular lamp 192 having a reflector 193.