Patent GB-545617-A (GB)
Abstract: 545,617. Calculating machines. BROIDO, D. April 24, 1941, No. 5290. [Class 106 (i)] Relates to machines operating by repeated addition and employing axially fixed result and revolution registers, a shiftable set-up mechanism, and printing mechanism arranged to co-operate with one or both registers, and comprises means for coupling at any stage of the calculation the type carriers with the register elements, together with means for zeroizing these elements to set the type carriers and means thereupon uncoupling the type carriers whereby the result and at least one factor may be printed. General arrangement.-The machine is provided with a set-up mechanism comprising barrels 7 of the Odhner type having finger tips 14, a results register 8 and revolutions register 9 in line therewith, and a printing device including a paper web 11 mounted at the rear top part of the machine. Set-up mechanism.-The barrels 7 are arranged to be shifted axially relative to the stationary registers permitting the employment of stationary printing mechanism. They are rigidly fixed by a key 19 to a sleeve 20, Fig. 3, rotatably and slidably mounted on a stationary shaft 21. The keyway 19 extends to accommodate a key 23 of a drive gear 24. This gear 24 is prevented from moving axially with the sleeve by a fixed lug 26 engaging a groove in the hub. A one-tooth pinion 29 in the sleeve 20 drives the register 9. A plate 30 shifts axially with the barrels but does not rotate with the sleeve ; it forms with a similar plate 35 and a connecting rod 40 the frame of the barrel carriage. The rod supports a cover 42 provided with slots for the finger tips 14. The rod 40 has a number of lugs 44 spaced apart a distance equal to a sideways step of the carriage. A bracket 45 is fixed to the base 1 on which is pivoted a locating pawl 47 normally engaged between two lugs but which may be released by a key 50 while the carriage may be stepped one step to the right or left by pressing. key 52 or 521. The barrels are zeroized by turning a finger plate 63 pivotally mounted on a bar 62 against the action of a tension spring and then moving the bar with its supporting arms 61 upwards the plate 63 picking up the finger tips 14. Results register.-The numeral wheels 71 each marked 0-9 are loosely mounted on a shaft 68. Each carries a ten-tooth gear 72 on one side and a one-tooth pinion 73 on the other side. The gears 72 mesh with idlers 74 rotatable on a shaft 75. The gears 74 are adapted to be driven by the barrel pins 12 when the barrels 7 are rotated. The pinions 73 co-operate with the known rockers 76 pivoted on a stationary shaft 77 and having slotted connection with the shaft 75 so as to be located in one of two positions by spring-plunger. On completion of a turn of the associated numeral wheel 71, the pinion 73 causes the rocker 76 to swing away from the wheel 71 whereby the sloped tail of the rocker is shifted into the path of the rocker 17 in the associated barrel 7. This swings sideways to engage the idler gear 74 of the next higher wheel 71 and move it on one step, whereupon the rocker 76 is restored by a cam 18 on the barrel 7. The wheels are zeroized when the crank 83 is rotated, an inclined cam in the bearing 70 forcing a comb 80 against influence of a spring 81 to bring the teeth in the comb into alignment with lugs 79 on pinions 73. Towards the end of the turn, the spring returns the comb into a recess in bearing 70. The register 8 can also be cleared by turning pinion 84 by a key 85. Revolutions register.-This is similar except that the wheels 91 are marked with two sets of numerals white 0-9 for positive revolutions, and red 1-9 for negative revolutions. The gears 92 of this register 9 have therefore nineteen teeth. The register is zeroized by turning crank 99 or gear 100. Printing mechanism.-In line with each gear 72, 92 is a segment 101. These are arranged on nested sleeves 102 on a shaft 103. On each sleeve at the opposite end to the segment is an arm 104. The shaft 103 is carried at each end by an arm 105 pivoted at 106. Each lever 105 is pivoted to a link 108 the other end of which has a pin 109 protruding through a slot in the side frame and carrying a roller engaging a cam 111 which reciprocates the shaft 103 and gear segments 101. Normally the latter are out of mesh with gears 72, 92, the shaft 103 being in the position shown by dotted lines 1031 in Fig. 2. The cam causes the segments to mesh with the gears at the appropriate time. The arms 104 are connected by links 114 to the printing sectors 116, 1161 for the two registers respectively. The sectors 116, 1161 are pivoted on a shaft 117 supported at the ends by pivoted arms 118. Each is pulled by a spring 122 so that a roller 121 engages a cam 124 on shaft 125 which reciprocates the arms and sectors which have type numerals 126. The type associated with negative indication of the register may have differentiating characteristics. The type forces a type-writer ribbon 10 and paper 11 against a platen 127. The arms 104 are normally supported by a fixed bar 128. The gear segments 101 are restored by the bar 129 of a bail 130 mounted on the shaft 103 and moved by a lever 132 rocked by restoring cam 138. An aligning bar 139 carried by arms pivoted on bar 136 is moved by a cam into mesh with the teeth of the segments 101. Driving mechanism.-The main shaft 112 is driven by a crank handle 147, 148. The handle 148 is pivoted and is first depressed to disengage it from a stop 150. The shaft 112 is rotatable and shiftable axially into one of two positions located by a spring ball 156 engaging either of two notches 157 in the shaft. The axial movement can only take place in initial angular position in which a cut-out 160 in a disc 159 is aligned with a stationary lug 161. When moved to calculating position, Fig. 5, two keys 162 secured to the shaft 112 engage a gear 163 meshing with the gear 24 on the barrel carriage. A ratchet 164 and pawl ensure that once a revolution is started in either direction it must be completed. When the shaft 112 is in calculating position, a ball 168 engages a groove 169 and allows a spring 175 to raise a rocker 171 from a key-way 22 to allow sleeve 20 to rotate, the sleeve being locked in the position of shaft 112. When the crank 147 is pushed inwardly, the shaft is in printing position and is disengaged from the barrels and coupled to the printing mechanism. In this position, two keys 178 on shaft 112 engage key-ways in the cam 111 on the right. The cam 111 on the left has a hub 179 carrying a sprocket wheel 181 driving by chain 182 a second sprocket on a shaft 125. Keys 162 on the shaft 112 in this position engage slots in a sleeve connected to the hub of wheel 181. A ratchet wheel 185 engages a pawl to ensure a one-way movement. The cams 111 carry gear segments 188 adapted to mesh with zeroizing gears 84, 100 and effect zeroizing after the cams have brought the segments 101 into mesh with gears 72, 92. The sleeve 184 carries a cam 144 operating the aligning bar 139 and a restoring cam 138. The restoring cam is one with two lobes 138, 1381 slidable on the sleeve 184 but not rotatable relative thereto. It is slid by a shift lever 191 pivotally mounted on shaft 136 and moved by a fork 193 moved about its pivot by hand lever 200 and link 197. The hand lever has two positions " non-clear and " clear." The swing lever 132 is arranged between two elevations of the cam 138 and has a roller 137 at each side of the lever. In one position of the lever 200, one of the rollers 137 is aligned with lobe 138 and in the other with 138<SP>1</SP>.