Patent GB-219955-A (GB)
Abstract: 219,955. Krupp Akt.-Ges., F. Aug. 1, 1923, [Convention date]. Hammer-impression arrangements: locking-devices. - In machines such as cash registers wherein items are printed or perforated upon cards or labels inserted therein, and wherein the drive of the machine is controlled bv a feeler which locks it against operation when no card is inserted, separately adjustable means are provided to render the feeler - controlled locking - device inoperative when printed cards &c. are not required. The operation of the cash register is controlled by keys a<1>, Figs. 1 and 3, provided with pins a<2> engaging an arm or strap a<3> on a rocking member a<5>, a<6> pivoted at a<4>. The arm a<6> of the rocking member is pivoted at one end of a connecting rod a<8>, the other end of which is pivoted to the arm a<10> of an angle-lever a<10>, a<11> loosely mounted on a shaft b<1>. A returning spring a<7> is connected to the lower end of the arm a<6>. A two-armed lever b<2>, b<3> rigidly secured on the shaft b<1> is connected to the anglelever a<10>, a<11> by a torsion spring b<4> which pulls a pin b<5> on the arm b<3> against a stop a<12> offset from the arm all of the angle lever. Towards the other end of the shaft b<1> is rigidly secured an arm b<7> pivoted to one arm of the feeler b<8> which is provided with a longitudinal slot, Fig. 4, engaged by a stationary guide pin d<1>. The label guide d<2> is arranged below the feeler b<8>, between the printing-hammer f<1> and the type-wheel e. The hammer f<1> is connected to an actuating rod f<4> by a two-armed lever f<2>, f<3> pivoted on a stationary shaft d<5>. A guide pin f<5> on the hammer moves within a guide fork g<1> on a slotted arm g<2> which is engaged by a guide pin g<3> on a setting-member g<4>. The setting-member g<4> is rotatable with a key pin g<5> and can be rotated through 180‹ in the direction of the arrow p<1>, Fig. 1, into the position shown in Fig. 2. A torsion spring g<6> holds the member g<4> in either of its limit positions. When the mechanism is in the position shown in Fig. 1, and a label or card Z is in the guide d<2>, the depression of a key a<1> causes the connecting-rod a<8> to pull upon the angle link a<10>, a<11> so that the arm a<11> moves upwardly. The torsional connecting-spring b<4> causes the double-armed lever b<2>, b' to follow the same movement and the members b<1> - - b<11> rotate until their movement is arrested by the feeler b<8> striking the introduced label Z. The parts a<1> - - a<12> however are free to continue until they reach their final position on the complete depression of the key and release the mechanism for actuating the printing-hammer f<1>. If, by accident, there is no ticket in the guide when a key is depressed, the parts continue to move until the nose of the feeler b<8> enters a recess d<4> in the ticket guide, and the two-armed lever b<2>, b<3> swings until a stop b‹ on the end of the arm b<3> enters the path of the stop a<9> on the connecting- rod a<8>, before the parts a<1> - a<12 >have reached their final positions, thereby preventing the full depression of the key and rendering the cash register inoperative. When the cash register is required to operate without the printing of tickets, the key pin g<5> and setting-member g<4> are turned through 180‹ by means of a key, thereby bringing a locking-pin g<7> on the member g<4> into the path of a stop g<10> on the arm b<7>, Fig. 2, and arresting the movement of the parts b<1> - - b<11> before the locking member b<6> enters the path of the stop a<9>, thus allowing the key to be fully depressed. The reversing of the setting member g<4> also shifts the position of the fork g<1> guiding the printing-hammer and prevents the hammer from striking the types e; in addition the insertion of a ticket is prevented by a finger g<8> on the fork g' projecting into the ticket guide. When a depressed key is released in known manner the parts are returned to their original position by the spring a', assisted by a roller c<1> which is mounted on a revolving wheel c<2> and bears against the arm b<2> of the lever b<2>, b<3>. The lever swings, and a tongue b<11> bearing on a pin a<13> on the connecting-rod a<8> positively returns the parts a' - - a<12>.