Patent GB-191119873-A (GB)
Title: Improvements in or relating to Adding Machines or other Machines for Producing Tabulated Lists or Records.
Inventor: BOULT ALFRED JULIUS
Filed: 1911-09-06
Granted: 1912-05-09
Abstract: 19,873. Boult, A. J., [Burroughs Adding Machine Co.]. Sept. 6. Tabulating - mechanism. - In column-tabulating mechanism of the kind described in Specifications 8575/04 and 23,614/08, wherein the carriage is arranged to travel by a continuous movement from any column position to any other, the column-keys set stops for the carriage and control reversing - clutches arranged between the carriage and a rotary motor. The invention is described with reference to the Borroughs adding - machines described in Specifications 17,126/93, 21,268/97, 27,874/03, 1810/08, 6114/08, and 16,800/08. (1) The motor runs continuously and is geared through a shaft 46 to a shaft 63 carrying bevel-wheels 66, 67 which mesh with a bevelwheel 55 on a shaft 56 geared to a rack 58 on the carriage 2<a>, shown in back elevation in Fig. 5. Either of the wheels 66, 67 can be coupled to the shaft 63 by means of coneclutches 50<a>, 51<a> which are connected through levers 59, 60 and links 72, 73 to a rocker 74 The rocker is normally maintained in an horizontal position, to hold both clutches out, by means of jaws 79 which are connected by a spring 79<a> and engage a lever 76 on the rocker. (2) The column-stops consist of fingers 15 secured to a rock shaft 11 journaled in the framework, the stops being adjustable along the shaft and being secured by screws 16. The stop - fingers arrest the carriage by engaging arms 20, 21 pivoted on the carriage and arranged so that, in either direction of travel, one of the arms wipes over the set-stop-finger, the other arm arresting the carriage and the first arm then springing down over the finger, as shown in Fig. 5. (3) The column-keys A effect a variable rocking of the shaft 11 for columnselection through devices of the following character. The shaft is geared by a pinion 14 to a slide B formed with a series of double inclines b with successively increasing and decreasing inclinations, the keys A being provided with rollers 7 adapted to ride down the inclines and shift the slide. The amount and direction of travel of the slide imparted by any of the keys are dependent on which of the faces of the corresponding incline b is presented, and this is determined by the initial column position of the carriage. The slide B is locked in the set position by means of a pawl 25 which engages teeth b<3> and is controlled by a latch 28 pivoted on a bar 32. When a column-key is depressed, a notch 36<a> therein moves the bar 32 to the right and the pawl is lifted out of the teeth by the latch. Further depression of the key shifts the bar 32 further to the right by a cam (not shown), and the latch is tilted by a stud 30 and releases the pawl, which thereupon drops into the teeth and locks the slide in the set position. When the key is released, the bar 32 is returned by a spring and the latch re-engages the pawl. (4) The column-keys control the reversing- clutches 50<a>, 51<a> through the following devices. The rocker 74 is secured to an arm 81 having a pin 81<a> engaging a slot 83 in a slide C formed with double inclines c adapted to be engaged by rollers 8 on the keys. The slide C is geared to a large pinion 40 having a yielding connexion with a small pinion 36 gearing with the slide B. The connexion consists of a friction-disk arranged between the pinions and held in engagement by a spring-disk arranged to press the wheels together. The connexion is weaker than the spring-jaws 79 which maintain the rocker 74 horizontal so that the movement of the slide C is arrested when either end of the slot 83 engages the pin 81<a>. When any column-key is depressed, the selected stop-finger is set as described above by a movement of the slide B to the left or the right, dependent on whether the selected column is to the left or the right of the initial position. The movement of the slide B is transmitted to the slide C through the gearing 36, 40, the slide C being arrested when the end of the slot 83 engages the pin 81<a>. When the roller 7 on the key has ridden off the incline b, further depression of the key brings the roller 8 into engagement with one of the inclines c and shifts the slide C further to the right or the left, and thereby, through the levers 59, 60, couples one of the clutches 50<a>, 51<a> and causes the carriage to be driven backward or forward. When successive tabulations in the same direction are made, the friction connexion between the pinions 36, 40 yields, and no movement is transmitted from the slide B to the slide C. Line-spacing mechanism. - (1) A cam 121, Fig. 11, secured to the main-shaft 100 which is rocked at each operation of the machine, is formed with a cam-groove x engaging a lever 122 coupled through a slide 123 to the linespacing pawl 229, the spacing being adjustable by means of a masking-plate 130. The camgroove has an inner concentric part arranged so that on release, as described below, of a lever 96 the lever 122 is operated for line-spacing by a spring 97 during the upward or initial stroke of the main-shaft. (2) The line-spacing mechanism is normally inoperative but can be set by a special key 100<a> or by the usual total-key 265. The lever 96 is secured to the lever 122 and is engaged by a latch-lever 99 coupled to the key 100<a>, which is depressed when line-spacing is required to accompany an operation of the machine. The key 100<a> is locked down during the line-spacing operation by a catch 91 adapted to engage a pin 99<a> on an extension 99<b> of the latch-lever 99. The catch 91 is released by a roller 219<a> on the usual key-releasing bail 219. For continuous line-spacing during singlecolumn work, the key 100<a> may be locked down by a notch 102. In order that the line-spacing mechanism may be set as an incident to the totalling-operation, the total-key 265 is arranged to release the lever 96 without requiring operation of the key 100<a>. For this purpose, the catch 91 is pivoted on the usual link 226 which connects the bail 219 to the total-key. When the total-key is depressed the link 226 carries the catch 91 backwards into engagement with the pin 99<a>. When the key is released, the link 226 returns, and by engagement of the catch with the pin rocks the latch-lever 99 and releases the lever 96.