Patent GB-190725219-A (GB)
Title: Improvements in Calculating Machines.
Inventor: ENSIGN EMORY SEYMOUR
Filed: 1907-11-13
Granted: 1908-11-12
Abstract: 25,219. Ensign, E. S. Nov. 13. Calculating-apparatus.-Relates to modifications of the key-set motoroperated multiplying machine described in Specification No. 22,824, A.D. 1904, particularly with respect to the totalizing- counter upon which the product is registered, the counting-wheels indicating the multiplier, the means for indicating the factor set upon the adding keyboard, the means for zeroizing, the mechanism for obtaining the products, and the driving- mechanism. 0 n e factor is set upon the adding-keys 61, which determine how many actuating teeth of each set of multiplier plates shall be projected into the path of the revolving totalizing -counter, which is revolved by the spring-motor as many times as is determined by the multiplying - key 102wLich is depressed. When " 0 " occurs in the second factor, the shift key 105 is depressed and the totalizing - counter is merely moved laterally one space. It is upon the counter 239 that the second factor, set by successive operation of the multiplying-keys, is finally indicated, while the other factor is indicated by the reflection of numbers raised by the adding - keys. In using the machine for addition only, the adder bar 340 is depressed to effect a single rotation without lateral movement of the totalizing-counter, while the release-bar 100 below may be operated to raise any depressed adding - keys ; zeroizing is effected by the lever 270. There are nine banks of nine adding-keys each, and there is attached to each key an adding-plate 62, Fig. 45, having as many teeth 65 as the key numeral ; in the shank 69 of each plate are slots 70 to receive the pin 71 upon the key-heads 61, suitable guides being provided for the shanks and adding-plates. Each plate has an arm 82 with outwardly bent finger 83 bearing a numeral which is displayed when the plate is depressed and may be seen by the operator by reflection in the mirror 85 ; a plate 87 displays " 0 " when no adding-plate of the bank is depressed, and the arrangement numeral-displayers is such that, should two plates of a bank be depressed together, the higher number only is visible. To ensure that successive depression of two keys of the same bank shall not be effected, the usual pair of notches 88, 89 and pawl 90 for holding the plates against their returning springs is employed. For the keyboard a green background is employed with suitable differences of colour between the numerals and the keytops and between various banks, according to the monetary or other system concerned. The adding-plates are released by the arms 99 upon the release shaft 101 contacting with and lifting the spring-controlled pawls 90, and this may occur either upon depression of the release bar 100, or under certain circumstances by the subsequent operation of the machine itself. Upon the main driving-shaft 137 of the machine is a balance wheel 134, Fig. 6, and also arms carrying a rod 157 adapted to balance the totalizing-counter, which is mounted in arms 161 adapted with their hubs to slide upon but rotate with the driving-shaft and to carry rigidly the main spindle 167 of the totalizing- counter. Of these two arms the one at the left is provided with a short finger 170 for actuating the multiplier counter and means 171 for preventing overthrow. The toothed numeral wheels 172 are loosely mounted upon the spindle and are provided with transfer mechanism of the type in which the transfer tooth unlocks the transfer link-work, which is thereupon moved by springs to effect the transfer and is subsequently positively re-set. The transfer tooth or cam 213 lifts an arm 231 pivoted to the framework of the counter and thereby unlocks the transfer-lever holding-pawl 211 to allow a spring 193 to swing the transfer lever 192 forwards and engage the pivoted spring transfer pawl 175 with the higher numeral wheel. The action is postponed if actuation is taking place, for which purpose an extension 203 engages a segmental flange to prevent the immediate movement of the transfer lever. A curved hook 200 prevents overthrow, and the parts are re-set by fixed fingers 236 upon the machine framework with which the above extensions co - operate. At the end of actuation also overthrow is prevented by contact of an overthrow pawl 222 with a projecting lip 224 ; back-lash is prevented by a non-reverse pawl. In the hubs of the numeral wheels are mounted spring pawls for engagement with a slot in the counter spindle for zeroizing ; and a similar arrangement is adapted for the multiplier counter. In order that this counter, which is stationary in the machine, may display the multiplier in the correct order, gearing is introduced between the receiving gear - wheels and the numeral wheels, and to prevent overthrow there are spring detents and also positively - engaging teeth upon the actuating-member carried by the revolving totalizing-counter frame for the same purpose. The zeroizing-lever 270 by suitable gearing rotates the spindles of both counters when completely operated. Lateral motion of the totalizing-counter is obtained by the tripping of the pawls 286 in succession by a tappet slidable on the shaft 293 associated with the balance wheel, whereby a transverse bar on the totalizing-counter frame makes equal steps to the right. The multiplying-plates 118, Fig. 49, resemble the adding-plates in their general shape, connexion with the keys, locking-notches 351, 352, and interlocking and releasing arrangements ; the " 0 " or shift-key 105 is adapted to force down the sliding member 312 and rock the segment 308 and thence the pinion 303 upon the lateral spacing shaft 293. The other multiplying-plates and the adder-bar plate also determine the amount of rotation of a gear-wheel parallel to the plates and having nine projecting pins at equal angular distances and of successively greater length, the gearing between the main driving-shaft and this gear-wheel being such that by the time, say, the " 8 " pin has struck the " 8 plate, the totalizing-counter frame will have made eight revolutions ; the pin forces the depressed multiplying-plate back, whereupon the driving connexion is broken and a spring returns the gearwheel with the differentially-spaced pins. During the last rotation of the totalizing-counter and the spacing parts due to the depression of any multiplying-plate, and after the return of said plate, the pin 125 is removed from the path of a lever 411, which thereupon allows the pawl 415 upon the rotating balance wheel 134 to engage a tappet upon and rock the spacing shaft 293, thereby moving the totalizing-counter one step to the right. A handle 57 is provided for moving the totalizing-counter to the left when required, and also a scale, pointed according to the denominations of the monetary system for which the machine is used. The machine is driven by the spring 461, Fig. 46, which is wound by an electromotor 442 through suitable ratchet mechanism, controlled by a conical pendulum governor 472 with braking-disks 468, 469, the circuit of the motor containing a contact which remains open as long as the spring remains wound to more than a certain extent. As the spring is wound, a nut upon the threaded end 463 of the shaft 444 is worked upwards and finally throws over a contact-making arm to interrupt the motor circuit, there being a controlling-spring to ensure a quick movement.