Patent GB-191417946-A (GB)
Title: Improvements in Adding Machines.
IPC: G06C7/06
Filed: 1914-02-05
Granted: 1915-04-06
Abstract: 17,946. Marks, E. C. R., [Addometer Corporation]. Feb. 5. Adding - apparatus with operating means.- Relates to the keyboard, differential, and mainoperating mechanism of the multiple-bank keyset independently - operated recording adding- machine of which the totalizer-engaging, totalprinting, and transfer devices are described in Specifications 3083/14, 3084/14, and 3085/14. Keyboards; keyboard-interlocks; differential mechanism.-In each denomination, the depressed key projects the corresponding member of the series of stop-rods 9, Fig. 1, assigned to the denomination, the stop-rods having the staggered vertical arrangement shown in Fig. 3, and being permanently connected to the keys 7 by means of bent levers 8. Lugs 15 upon the stop-rods co-operate with pins upon a vertically movable spring latch-bar 16 to lock the depressed key and to unlock it when another key is depressed in the same bank. For each. denomination, there is a combined rack-bar and type-plate 73, 42, 64, guided upon a tubular post 43, Fig. 7, containing a spring 45 constantly urging the rack-bar upwards. Movement is normally prevented as follows : -(1) by a latchplate 151, provided with a flanged plate 156, the lower edge of which normally takes over a projection 63 upon the rack-bar. The projected stop-bar presses back the plate and so releases the rack-bar. (2) By a main releasing and restoring yoke, adapted to be raised and lowered by the main operating-mechanism. The keys are locked during operation by the handle by a movement of cam-levers 38 derived from a pin 39 upon a main-operating slide 53, whereby a cross-bail 37 is brought over the ends of levers 19 from which the latch-bars are suspended, so that no bar can move upwards. Multiplying by repetition; error-keys.-Normally a pin 36 upon an arm 35 keyed to the main operating-shaft 60 rocks a latch 29 upon a lever 26 idly during its forward stroke, but on the return displaces the lever, whereupon a keyrestoring bail 22 is raised and with it the whole of the latch-bars so as to release the keys towards the end of the operation. By depressing and fixing down a repeat-key 33, the latch upon the lever is so controlled that no movement of the key-restoring bail takes place, whereby the same item may be repeatedly added without resetting. The bail may also be lifted bv means of an error key 28, whereby the whole of an incorrectly set item may be removed before operation. A mistake in any one denomination may be corrected by depressing the correct key, or if none is required, depression of the keybutton 152 upon the upper end of the latchplate causes a roller 157 thereon to rock the lever 19 and thereby raise the latch-bar 16, at the same time re-latching the rack-bar. Printing totals.-Displacement of the whole of the latch-plates is brought about, when a total is to be printed, by the rocking of a spindle 158, carrying a plate 159, through mechanism not described. Operating-means; dash-pots.-The handle 61, Fig. 8, upon the main shaft 60 causes reciprocation of a side bar 53, having a pin-and-slot connexion 51, 52 with a crank 50 upon a shaft 49 carrying the rack-bar releasing and restoring yoke 46. In normal position, a spring 58 keeps the pin at the forward end of the slot, as shown, and a toggle 54, 55 between the side-bar and the pin is broken. As the bar moves forwards, the resistance of the main restoring-springs 170 attached to arms upon the shaft 49 causes a straightening of the toggle, pushing the pin to the rear of the slot and giving time for the locking of the keyboard and other actions. Upon the return of the handle, the parts maintain this position until an arm 56 upon the toggle strikes a stationary pin 57, whereupon the restoring-yoke is again stationary during the last part of the movement. Links 167, 168 connect a dash-pot 165 with the side-bar, which thus makes its entire return movement at a predetermined speed. Various parts of the machine, such as the transfer and totalizerengaging mechanism (not shown) derive their movement from the side-bar.