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US3078732A Expired / Lapsed US ⏱️ 0.0 years remaining

Incremental drive mechanism

Assignee: International Business Machines Corp
•
Filing: 1959-12-30
•
Granted: 1963-02-26
•
Expires: 1979-12-30
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Abstract

Abstract 936,441. Ratchet gearing. INTERNATIONAL BUSINESS MACHINES CORPORATION. Jan. 2, 1962 [Jan. 9, 1961], No. 94/62. Addition to 932,113. Classes 80 (2) and 80 (3). In a two-speed ratchet gear, two pawls 26a, 26b on pawl actuating arms 14a, 14b are driven in opposite phase in cyclic manner to move the pawls into and out of engagement with parallel sided notches 30 in a ratchet 28a, 28b, means being provided to latch one pawl arm to prevent that pawl moving the ratchet, whereby the ratchet is driven at a lower speed when the pawl arm is latched. In a punched card feed mechanism, a driving-shaft 12 carries two cams 13a, 13b, 180 degrees out of phase, which oscillate a forked pawl lifting member 34 and pawl arms 14a, 14b, respectively. The lifting member arms 36a, 36b are arranged to lift the pawls out of the notches on the return stroke. A pawl may be held from engagement, to provide a half-speed drive, by electromagnet 41 having a " hold " coil 41a and a " bucking " coil 41b, under which condition the pawl enters a notch to prevent back-running but does not drive the ratchet. In a second embodiment, Fig. 2, (not shown), the pawls are arranged to impart step-by-step motion to linearly moving notched rods.

Inventors

  • 👤 Gunter H Schacht
  • 👤 Lawrence A Wilson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 19:40
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/07; G06K13/077; F; F16; F16H; F16H31/00; F16H31/003; F16H31/004; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/1518; Y10T74/1523; Y10T74/1526; Y10T74/1553; Y10T74/1555; Y10T74/1558; Y10T74/1565; Y10T74/1566; Y10T74/1568; Y10T74/1569; Y10T74/1571; Y10T74/1577; Y10T74/1579

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 174 words
APPARATUS FOR PRODUCING INCREMENTAL MOTION FROM A ROTATING SHAFT COMPRISING A RATCHET INCLUDING A PAIR OF SPACED DISKS HAVING A PLURALITY OF ALIGNED NOTCHES THEREIN, A FIRST PAWL AND A SECOND PAWL ADAPTED TO ENGAGE SAID NOTCHES, A FIRST PAWL ACTUATING ARM AND A SECOND PAWL ACTUATING ARM CONNECTED RESPECTIVELY TO SAID FIRST AND SECOND PAWLS, A FIRST CAM DRIVEN BY SAID SHAFT FOR DRIVING SAID FIRST AND SECOND PAWL ACTUATING ARMS IN OPPOSITE PHASE IN A CYLIC MANNER, A SECOND CAM DRIVEN BY SAID SHAFT, AND A FIRST AND A SECOND PAWL LIFTER DRIVEN BY SAID SECOND CAM, SAID PAWL LIFTERS EXTENDING BETWEEN SAID SPACED DISKS TO ENGAGE SAID PAWLS IN THE CENTER THEREOF AND TO LIFT SAID PAWLS OUT OF SAID NOTCHES IN OPPOSITE PHASE, SAID PAWL ACTUATING ARMS AND SAID PAWL LIFTERS MOVING SAID PAWLS INTO AND OUT OF ENGAGEMENT WITH SAID NOTCHES TO MOVE SAID RATCHET BACK AND FORTH IN INCREMENTAL MOVEMENT AS SAID FIRST AND SAID SECOND CAMS ROTATE, EACH OF SAID PAWLS BEING ENGAGED WITH ONE OF SAID
Claim 2
Dependent Claim 174 words
APPARATUS FOR PRODUCING INCREMENTAL MOTION FROM A ROTATING SHAFT COMPRISING A RATCHET INCLUDING A PAIR OF SPACED DISKS HAVING A PLURALITY OF ALIGNED NOTCHES THEREIN, A FIRST PAWL AND A SECOND PAWL ADAPTED TO ENGAGE SAID NOTCHES, A FIRST PAWL ACTUATING ARM AND A SECOND PAWL ACTUATING ARM CONNECTED RESPECTIVELY TO SAID FIRST AND SECOND PAWLS, A FIRST CAM DRIVEN BY SAID SHAFT FOR DRIVING SAID FIRST AND SECOND PAWL ACTUATING ARMS IN OPPOSITE PHASE IN A CYLIC MANNER, A SECOND CAM DRIVEN BY SAID SHAFT, AND A FIRST AND A SECOND PAWL LIFTER DRIVEN BY SAID SECOND CAM, SAID PAWL LIFTERS EXTENDING BETWEEN SAID SPACED DISKS TO ENGAGE SAID PAWLS IN THE CENTER THEREOF AND TO LIFT SAID PAWLS OUT OF SAID NOTCHES IN OPPOSITE PHASE, SAID PAWL ACTUATING ARMS AND SAID PAWL LIFTERS MOVING SAID PAWLS INTO AND OUT OF ENGAGEMENT WITH SAID NOTCHES TO MOVE SAID RATCHET BACK AND FORTH IN INCREMENTAL MOVEMENT AS SAID FIRST AND SAID SECOND CAMS ROTATE, EACH OF SAID PAWLS BEING ENGAGED WITH ONE OF SAID

References Cited (Backward Citations)

US305752A Cited
US646287A Cited
US795095A Cited
US2005807A Cited
US2343549A Cited
US2942486A Cited
US2933931A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1966-02-25 1966-08-27 1967-02-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1970-02-25 1970-08-27 1971-02-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1974-02-25 1974-08-27 1975-02-26 $7700.00 Window Closed / Lapsed

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