Patent GB-190815095-A (GB)
Title: Improvements in or relating to Calculating Machines, Cash Registers & the like.
Inventor: LEMAIGNEN ROBERT BERTIN AUGUST
Filed: 1908-07-16
Granted: 1909-07-16
Abstract: 15,095. Lemaignen, R. B. A. July 16. Calculating - apparatus; receipts, checking and recording. - In the registering - mechanism of calculating machines, cash registers, and the like, (1) a pair of idle or supplementary wheels is provided between each receiving-wheel and its totalizing-drum, in addition to the usual transmitting-mechanism, so that, in order to adapt the machine to a different denominational system (e.g. to days, hours &c., from pounds, shillings, &c.), it is only necessary to substitute other supplementary wheels and drums. The invention is illustrated in connexion with a keyoperated single-bank adding-machine assumed to be provided with the indicator referred to in Specification No. 15,094, A.D. 1908. The following features are also described in detail: (2) the key-operating and stop-mechanism ; (3) the denomination-selector carrying the master setting- wheel with the positioning-means therefor ; (4) a stop-mechanism for preventing backward rotation of the registering-train ; (5) the registering-wheels with the allied transfer and overthrow-preventing mechanism ; (6) the means for removing the overthrow-preventing stop from the particular receiving-wheel it is desired to operate ; and (7) the zeroizing-mechanism. (1) To each drum 20, Fig. 4, is fixed a toothed wheel 22 gearing with a wheel 22<1> attached to the usual receiving-wheels 23 which are successively engaged by the master setting-wheel 23', described below. (2) The depression of a key 1, Fig. 4, rotates by means of a pin-and-slot connexion 11, 10 the plate 8, loosely pivoted upon the shaft 9 and carrying the spring- controlled pivoted pawl 13. The pawl 13 drives the ratchet-wheel 12 fixed to the shaft 9, thus driving the toothed wheel 38<1> operating the registering - train through the toothed wheel 38 and setting - wheel 23<1>, until a pin 19 on the plate 8 engages with one of a series of arms 18 fixed to the shaft 17, thus bringing a stoppawl 16 into the path of the teeth of a ratchet-wheel 15, fixed to the shaft 9, and stopping the machine. (3.) The denomination - selecting carriage, consisting of cheeks such as 34, Fig. 4, slidablymounted upon the rod 60 and bearing the setting-wheel 23<1> feathered upon the shaft 36, is adapted to be positioned in engagement with any one of the denominational series of receiving-wheels 23 by means of cords 43, 44 controlled by a drum 39, Fig. 6, mounted upon a shaft 40. This shaft is adapted to be rotated through bevel-gearing 47, 48 in one direction by the depression of a key which drives the ratchetwheel 49 through a pin 56, slotted plate 54, and pawl 53, in a manner similar to that already described in connexion with the keys 1. A detent 50 for the ratchet-wheel 43 is mounted on the keylever 51, which is adapted on the depression of the key 52 to engage with a finger 50', projecting from the driving-pawl 63, and to disengage both pawls from the ratchet-wheel. When this takes place, the shaft 40 and drum 39 are driven in the opposite direction by a spring-drum fixed to the shaft 46. A pointer is provided on the carriage showing which one of the denominational sets of registering-wheels is being operated. (4) To prevent backward rotation of the registering-trains when the machine is suddenly stopped at the end of a key-stroke by the stop-pawl 16, a spring-controlled detent 79, Fig. 6, is arranged to operate in connexion with a ratchet-wheel 78 fixed to the shaft 36. (5) Cams 28, Fig. 3, fixed to the registering-drums and having one or more steps, operate the drums of higher denomination at transfer by means of projections 28<1> upon levers 29, pivoted on a shaft 30 and controlled by springs 31. The levers carry spring-controlled pawls 32 adapted to engage with and advance ratchet-wheels 25 attached to the wheels 23, exact movement being ensured by pawls 26. The pawls 32 are provided with fails, and their movement is limited by pins 32<1>, on the transfer-levers 29, engaging therewith. Overthrow is further provided against by means of fingers or stops 29<1>, on the levers 29, which engage between the teeth of the wheels 22 attached to the next higher registering-drums. (6) Before a particular receiving-wheel can be operated by the setting- wheel 23', this overthrow-preventing stop 29<1> must be disengaged, and this is accomplished automatically, when the denomination-selector is moved, by a slide 62, mounted on a shaft 62<1>, which engages with and depresses the tail of the relevant transferlever, the slide being controlled by cords wound upon a second drum attached to the shaft 40. (7) The registering-drums 20 are mounted by means of a shaft 21 in a frame 76 attached to a pivoted bar 68, and their toothed wheels 22 are normally kept in engagement with the wheels 22<1> by a spring 69, Fig. 4. Pins 73<1>, Fig. 3, screwed to the shaft 30 engage slots in the shoulders 72<1> of arms 74, loosely pivoted on the shaft 30 and having a pin-and-slot connexion with a link 75 attached to the frame 76. Slots in the shoulders of the transfer-levers 29 are similarly engaged by pins upon the same shaft 30; in both cases the slots allow some free play for the pins. When the shaft 30 is manually rotated by means of an external driver (not shown), the stops 29<1> and projections 28<1> upon the transfer-levers are disengaged from the wheels 22 and cams 28 respectively, and the wheels 22 attached to the registering-drums are rocked by the link 75 out of engagement with the wheels 22<1>. The drums being thus freed are rotated by means of weights attached to their inner circumferences into the zero position.