Durch Kennzeichnungstraeger gesteuerter Zaehler

• Main Authors: BEATTIE HORACE SMART, DALY GEORGE FRANCIS
• Format: Patent
• Language: German
• Published: 20.07.1953
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

638,890. Statistical apparatus. BRITISH TABULATING MACHINE CO., Ltd. Oct. 8, 1947, No. 27038. Convention date, Oct. 17, 1946. [Class 106 (i)] The invention relates to a cyclically operable accumulator of the type in which an impulse transmitted to a start magnet starts a wheel rotating to make entry of a digit, and an impulse transmitted to a stop magnet stops the wheel rotating, while concurrent impulses to the two magnets have no effect on the wheel. The invention is characterized by a cyclic impulsing device adapted to send an impulse to the stop magnet at a predetermined point in the cycle, and means controlled by the sensing of a designation in a record card to send an impulse concurrently to the start magnet, whereby the accumulator wheel will continue rotating if it is in motion and will remain at rest if it is not in motion. Numerical data are represented by perforations in a card 10, Fig. 3, in a 2, 1, 2, 5 code, the sensing of a hole at the first point in the cycle (representing "2") completing a circuit to a start magnet AM, Fig. 1, which, pulling over an armature 36, rocks a bell-crank 21 counterclockwise, whereby an abutment 21a is moved clear of a toothed disc 20 allowing a spring-urged dog 30 to engage with a constantly-rotating ratchet wheel 15 and so drive the associated accumulator wheel 24 and carry-over cam 26. A similar clutch-engaging action is initiated if a hole is sensed at the second point in the cycle (representing " 1 ") and at the third point an impulse is sent to each stop magnet SM by the closing of cam contacts C2. If there is no perforation in the card at the third position, the energization of the magnet SM, Fig. 1, causes clockwise movement of the bell-crank 21 and engagement of its abutment 21a with a tooth 20a of the disc 20. The dog 30 rides up the cam 20b and is disengaged from the ratchet wheel 15. Where a perforation is sensed in the third position, however, both the magnets SM and AM are energized simultaneously and the armature 36 remains in its previously set position (i.e. against magnet AM if a hole has been sensed previously, or against magnet SM if a hole is in the third position only-representing " O "). Declutching of the accumulator wheels two points after the representation of a second " 2 " is accomplished by a pin 51, Fig. 1, which engages the bell-crank lever 21 and moves it into the declutching position. Then follows the sensing of the " 5 '' holes, if any, causing re-clutching of the accumulator wheels which are again declutched by a pin 52 after the equivalent of 5 units has been entered. Carry-over is initiated by the closure of contacts C3, Fig. 3, impulses caused by the closure of contacts C1 passing through the usual contacts 39, 40, 41 according to the settings under the influence of the cams 26, Fig. 1.