Patent GB-190513149-A (GB)
Title: Improvements in Computing Machines and in Means for Operating the same from Typewriters
Inventor: MARSHALL HOLMES
Filed: 1905-06-26
Granted: 1906-03-01
Abstract: 13,149. Marshall, H., and Uebbing, J. T. Jan. 4, [date applied for under Patents Act, 1901]. Calculating-apparatus.- Multiple-bank key-set lever-operated adding-machines are described, either for use independently or by means of attachments from the keyboard of a typewriter, and are provided with arrangements for resetting either before or as a part of the operation, or at single denominations only, and means for transferring upon and zeroizing the total counter. The apparatus is of the same general type as that described in Specification No. 1481 A.D. 1897, reference being also made to Specification No.13,504, A.D. 1851. The typewriter keys are provided with cross-bails which actuate the adding-machine through a single set of keys carried by a traversing- carriage. Fig. 1 shows the general arrangement of typewriter and adding-machine, and Fig. 3 the unit of the latter machine, which corresponds to each denomination and is contained in a suitable casing 23, all such units being interchangeable. The operating-lever has a simple full-stroke arrangement ensuring a single turn only of all the shafts 33, previous to which one of the nine keys 53 ... 61 has been depressed for each denomination, the corresponding detent 50 raised, and a flanged pinion 49 allowed to slip to the left under the action of the spring and lever 51<1>, 52<1> so as to gear the pinion with a mutilated wheel 38 upon the lower shaft having as many teeth as there are digits in the key depressed. The flanged pinions always turn with their shaft 48, whereby the operation of the lever adds the required numbers to the numeral wheels 19 of each order. To reset the parts, the shaft 48 is slid through its bearings until the collars shown have pushed the flanged pinions into the normal position, and this may be done: (1) by pulling each shaft individually, for which purpose a rotatable end piece 97 is provided, (2) by a slotted link 87, Fig. 4, attached to the operating-lever, whereby arms 83 upon a common shaft engaging with collars upon each counter shaft are actuated, and (3) by means of a special re-setting lever 94 and similar arms 91. When the special re-setting lever is moved to the opposite direction, it b ings mutilated pinions 95, 101 into gear, and an operation of the main lever will then zeroize each counter shaft. Transferring is effected in like manner to registration by the tooth 64 tripping a spring, thus allowing a flanged pinion 67 on the higher shaft to move to the left and engage with a single-toothed wheel 70 at operation ; the engagement is arranged to follow actuation of the same shaft by its "9 pinion, and the transfer teeth are in echelon to secure successive action. Fig. 1 shows the bails 111, operated by the typewriter keys a little before the types strike, and the single row of keys 105 in a travelling frame 103 provided with a separate escapement and returned by the first stroke of the handle to a desired point, the connecting-cord being adjustable on the handle for the purpose. Sliding stops 118 are also provided, and spacing indicators 120, with a bell sounded at a particular position of the carriage.