Patent GB-362433-A (GB)
Abstract: 362,433.. Calculating- apparatus. MERCEDES BœROMASCHINENWERKE AKT.-GES., Benshausen, Post, Zella- Mehlis, Thuringia, Germany. Sept. 3, 1930, No. 26253. Convention date, July 8. [Class 106 (i).] Attachments and connections to typewriters.-In a combined typewriting and computing machine a special key is provided to control the operation of the members co-operating with the carriage escapement mechanism, the carriage returning device, the clear sign impression mechanism, and the operating means of the line totalizer simultaneously whereby the adjustment of the carriage is facilitated. In the machine shown in Figs. 1 and 2, a frame 1 with runner bars 2, 3, supports a platen carriage 4 controlled for stepby-step movement in the known manner by an escapement mechanism and pring device. The carriage is provided with a bar 6 supporting a number of column totalizers 7l, 7r, 7r1 each having an operating projection 7a for co-operation with a hook 8 on the operating member 9 of a line totalizer 10 displaceably mounted on a support 12. A set of tabulator key levers 15 pivoted on an axis 16 co-operates with columnselecting rods 18, 18<1>, Fig. 3, guided for vertical movement by means of a block 19 and rod 20 passing through slots in the rods. The selector rods have triangular slots 18b in which works a pin 23 on a member 22 pivoted on the rod 20. The member 22 has an extension 24 co-operating with a lever 25 provided with lugs 25a adapted on depression of any one of the tabulating keys T to operate the carriage escapement mechanism. The lever 25 is secured to a shaft 34 carrying an arm 37 pivotally connected to a bar 41 provided with a lug 41a coacting with a bell-crank lever 52. Loosely mounted on the shaft 34 is a lever 35 having at its upper end a lug 35a engaging the lever 25 and a roller 33 co-operating with a bar 31 carried by the carriage releasing lever 30 pivoted to the side frames at 29. The lever 35 at its lower end has a slot engaging a pin 35c on a lever 42 forming with a lever 44 a yoke member 43 rotatable on a shaft 45. To the lever 44 is pivoted a rod 47 which at its free end engages a lateral projection 48a on a bell-crank lever 48 that co-operates with a notched bar 27 pivoted to the operating member 9 of the line totalizer. An angle member 54 secured to the lever 42 engages the upper end of a bar 55 which is pivoted at its lower end to the kev lever 15. When it is desired to shift the carriage from the first column totalizer to the third column totalizer the control key 14 is depressed. This action raises the bar 55 and rotates the levers 42 and 35 in the direction of the arrow A, Fig. 3, causing the shaft 34 to rock. The movement of the shaft through the lever 25 releases the carriage escapement mechanism and through the arm 37 and link 41 operates the bell crank 52 and the members 52b, 52c associated therewith to render the known carriage returning mechanism and clear sign impression device ineffective. At the same time through the yoke member 43, lever 44, and link 47 the bell crank 48 is rocked so that upon movement of the carriage the line totalizer 10 is moved until the lever 48 enters the notch 28 in the lever 27 to hold the totalizer in position and thus avoid alternate connection and disconnection thereof. When the desired column totalizer is nearing the operative position the operator depresses the appropriate tabulator key to raise the column selector rod 18<1> and place its end in the path of the carriage stop 69 to arrest the carriage movement. The depressed key is first released to permit the bell crank 48 to release the line totalizer and restore certain of the operated members. The tabulator key is then released and the rod 41 permitted to move to allow the carriage-returning mechanism and clear-sign impression to assume their operative position. Associated with the key lever 15 is a spring-controlled plate 58, Fig. 1, which is moved longitudinally on depression of the centre key to bring the prongs thereof under the numeral keys 57 to prevent depression thereof. The notches are so designed as to permit of depression of the tabulator keys in this displaced position.