Patent GB-138077-A (GB)
Abstract: 138,077. Teetor Co., (Assignees of Teetor, M.). April 18, 1914, [Convention date] Type-wheel machines.-In a calculating-machine, the main rock-shaft 69, Fig. 3, which is rotated by chain-andsprocket gear from the main controlshaft 155 has frictionally mounted thereon the differentially moving members 70 having extensions 92 forming arms for the type-sectors 97, and the actuating-segments 68. These friction connexions comprise collars 89, 90 keyed to the shaft 69, and babbitt disks 68<1>, 92' cast on the faces of the members 70 and segments 68, as shown in Fig. 5. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following subject-matter, which does not appear in the Specification as accepted :- Type-wheel actions.-The depression of a key Fig. 3, is limited by a projection 10, and each key-stem 9 has a lug 11 co-operating with a pivoted stirrup 12, spring-pressed towards the stem by an arm 14 to which is attached a stop-wire 18, guided in a pair of slotted plates 52 and serving as a stop for the differential member 70. The depression of a key also causes a shoulder thereon to engage a roller 44 on a sliding plate 45 which, through a link 47, withdraws the zero stop-wire 51 from the path of the differential member 70. Hammer-impression arrangements. - When a type plate 97, 98 carrying the types 99, Fig. 23 (Cancelled), has been raised in accordance with the key depressed, a lever 121 is rocked until a stop 119' thereon engages a notch 119 in a lever 117. The impression hammer 108 pivoted at 109 is rocked by means of an " X " bar 126, and a lug 116 on the hammer is thereby moved into a position for engagement with a notch 118 on the lever 117 but only engages the notch when the lever 121 is in its normal position and thus prevents the hammer making an impression. Rotation of the " X " bar by means of reciprocating bars causes the rocking of a bar 123 to allow the lever 117 to move upwards as far as is permitted by the lever 121. The zeros to the right are printed by means of plungers 129 which are adapted to be struck by the tails 115 of the hammers and thereby through the offset looped end 130 unlatch the levers 117 from the lug 116 on the next lower denomination successively across the machine. Column-printing arrangements. - A ratchetwheel 280, Fig. 47 (Cancelled), co-operates with a dog 281 mounted on a crank arm 283 both of which are normally held by a hook 284. The crank arm is connected to a pitman 292 and adapted when the dog 281 engages the ratchetwheel 280 to rock the carriage-reciprocating link 481, Fig. 52 (Cancelled). The link 481 is attached to a block 482 having pawls engaging notches in the shaft 484. The pawls can be freed by rotating the shaft and the carriage shifted 'laterally to change its relative position. The action of the dog 281 is governed by a push rod 297 pivoted to the rock lever 293 and having springs 298, 299 engaging a collar on the arm 286. The upper end of this arm is held by a lug 301 thereon engaging lugs 302 on levers 303, 308 pivoted at 304. When the carriage-lock lever CL is depressed, the lug 302 on the lever 303 locks the arm 286 and prevents a shift of the carriage. In the raised position of the lever CL this lug is cut of action and the arm 286 is freed from the second lug 302, each time the total &c. levers L are manipulated, the lever 308 and thereby the lug 302 being raised out of the path of the arm 286 so that the dog 281 is free to engage the ratchet-wheel. When the shaft 484 is rotated to free the pawls, the carriage is locked in the set position by a notched plate 494 engaging pins on the supporting plate 433; the plate 494 can be released by operating a thumb lever. Ink-ribbon mechanism.-The movement of the ribbon in either direction is effected when the ribbon has been unwound from a spool by means of a swinging flap 390, Fig. 32 (Cancelled), which releases a finger 391 to allow a pawl to engage a gear wheel 389 on each spool adapted to be rotated by corresponding plates 392 or 393, Fig. 28 (Cancelled), pivoted to arms connected by a link and rocked by means of a block 375 engaging a lug on a rocking member. Rotation of either gear wheel 389 advances a pinion 405 to which is attached a drum 407 carrying a chain around a drum 410; the drum 410 carries a cam disk 412 and controls the movement of a pin at the pivot of two arms 415, 416 and is moved up to the dead centre whereupon a snap action causes the cam to rotate and rock a lever 403 so as to reciprocate a plate 399. The plate 399 carries projections 400, 401 whereby either one or other of the plates 392, 393 is disengaged and the other thrown into engagement with its corresponding spool gear wheel. The ink-ribbon is given an up and down movement to bring all the parts equally into use by means of a cam rotated by means of a ratchet-wheel and pawl pivoted to a rocking member. The cam engages an arm pivoted on a shaft 429 having arms 430 engaging links 431 on plates supporting the spools, as shown in Fig. 34 (Cancelled). Line-spacing mechanism.-The carriage comprises end plates connected by bars 443, 444 supported on a plate 433, Fig. 34 (Cancelled). The platen swings about a shaft 445 and rubber rollers 452 are adapted to press yieldingly on the paper strip. The platen is rotated by a ratchet-wheel and pawl 456, Fig. 35 (Cancelled), the latter being mounted on a rocking-arm 459 to the lower end of which is attached cross-bar 462, oscillated by a finger 464, Fig. 52 (Cancelled). The platen is rotated two spaces when a total is to be taken by an auxiliary finger 467, which is adapted to give the bar 462 a shift corresponding to one space by means of a link connected to the rock-shaft 26 and to a link 475 operating a cam 471 engaging a roller 473 on the auxiliary finger. Operation of the machine advances the platen a second step by the engagement of roller 473 with the cam 471 when the finger 464 is rocked. The platen may be rotated by hand by means of a finger piece adapted to rock the cross-bar 462. Platen-scales.-A plate 500, Fig. 35 (Cancelled), is supported by an arm eccentrically mounted with respect to the shaft 445 so that on raising the plate 500 the end thereof may act as a guide cr ruler.