Patent GB-190800656-A (GB)
Title: Improvements in or relating to Adding Machines.
Inventor: BOULT ALFRED JULIUS
Filed: 1908-01-10
Granted: 1909-01-11
Abstract: 656. Boult, A. J., [Burroughs Adding Machine Co.]. Jan. 10. Typewriters and like machines.- Adding machines of the Burroughs type, described in Specifications No. 17,126, A.D. 1893, and No. 27,874, A.D. 1903, are provided with means for registering the number of items added by the machine and for printing the total number of such items automatically and in a distinctive colour whenever a grand total or sub-total of the items themselves is printed, for which purpose two or more of the sets of mechanisms, controlled by the corresponding banks of keys, to the left-hand of the machine are utilized as a means for registering and printing the total of the number of items added ; or additional sets of such mechanisms may be provided for this purpose. As shown in Fig. 3, the machine is split or divided into two independently-operative portions between the second and third denominations counting from the left, by the omission from the second hammer latch 717 of its overlapping tail, which thus causes a discontinuance in the usual automatic tripping of latches from left to right of the machine for the printing of necessary ciphers to the right of any digit- Means are provided by which, for every item added by the right-hand section of the machine in the usual way, one unit only is added to the left-hand section which has a capacity up to ninety-nine items, and by which the printing of the numeral 1 by the left-hand section at every operation is prevented, the total of the items only being printed by this section as an incident in the printing of an ordinary total or sub-total. The stop-wire corresponding to the numeral key " 1" in the second bank of keys counting from the left which normally rests in the uppermost slot in the guideplates 210 for the corresponding rack 610, is replaced by a special stop-wire 270<a>, Fig. 5, and the remaining stop-wires for this bank are thereby rendered unnecessary. The rear forked end a of the special stop-wire embraces the universal rod or bail 402 mounted in pivoted arms 424, which is grooved for this purpose, and the projecting portion c is attached to this rod by means of a spring d, Fig. 1. The forward end b of the stop-wire normally engages the front of the retainer 415 for the corresponding rack 610. Every time an item is set up on the keyboard of the machine, sliding bars 214 corresponding to those banks in which keys have been depressed move rearwardly and carry with them the universal rod 402 by means of depending lugs 214<a> on the bars, simultaneously disengaging the retainers 415 from and thereby unlocking corresponding racks by means of upwardly-projecting lugs 214<b>. At every operation of the machine the rod 402 will draw the stop-wire 270<a> to its rearward limit of movement in the slot in the corresponding plates 210, and the forward end b will simultaneously disengage the corresponding retainer 415 and release the rack 610, which will be free to descend until it engages with the stop-wire 270<a>. One unit will thus be added to the adding- wheels of the left-hand section of the split machine for every operation. A bail A, Figs. 2 and 3, secured to the rock-shaft A<1>, which is in turn connected to the common pivot 251 of the usual totalkey bell-crank 227L and link 226 of a Burroughs machine by a spring-controlled arm B<1> and link B, is provided and normally overlies the type-hammers 715 near their common pivot. The hammers 715<a> of the left-hand section are, in the normal position of the bail A, arrested in their ordinary rearward movement by this bail and prevented from delivering a printing blow, but the hammers 715<b> of the regular right-band section are recessed, as shown in Fig. 2, and are therefore not interfered with. When the usual total-key 265 is depressed in the course of taking a total or subtotal, the rearward movement of the link B raises the bail A to the position shown in dotted lines in Fig. 2, and thus the operation of the lever causes both sections of the machine to print the totals accumulated by the corresponding sections of the registering-mechanism.