Abstract 987,793. Change-speed gear; ratchet clutches. FICHTEL & SACHS A.G. Dec. 19, 1962 [Dee. 22, 1961], No. 47969/62. Headings F2C and F2D. Centrifugal masses 16, Fig. 1, guided by pins 36 and radial grooves 18 on a carrier sleeve 17 rotatable about a fixed axle and driven at a step-up ratio from a cycle hub 2 through a simple gear train 20, 26, fly outwards at a predetermined hub speed against the bias of garter springs 24 and thus release pawls 23, Fig. 2, which they overlap, for spring-biased engagement with ratchet teeth 15 in the hub, a step-up drive thus being obtained from an input sprocket 25 and a sleeve 3, coupled at 11 to a carrier 4 mounting planet pinions 9 meshing a fixed sun gear 7 and a ring gear 10, itself coupled at 12 to the support 13, 14 of the pawls 23. Prior to outwards movement of the centrifugal masses 16, the input sprocket 25 and carrier 4 drive the hub 2 directly through pawls (not shown) engaging ratchet teeth 6 in a ring secured to the hub, these pawls overrunning when the step-up ratio is established. The edges 38 of the masses 16 overlap the edges of the pawls 23, which are biased to turn in the engaging direction by a ring spring 35.
A MULTIPLE SPEED BICYCLE HUB COMPRISING, IN COMBINATION: (A) A SHAFT HAVING AN AXIS; (B) A DRIVER MEMBER MOUNTED ON SAID SHAFT FOR ROTATION ABOUT THE AXIS THEREOF; (C) A HUB SHELL MOUNTED ON SAID SHAFT AND ROTATABLE ABOUT SAID AXIS; (D) MULTIPLE-RATIO TRANSMISSION MEANS MOUNTED IN SAID HUB SHELL AND INTERPOSED BETWEEN SAID DRIVER MEMBER AND SAID HUB SHELL FOR ROTATING SAID HUB SHELL AT ONE OF THE MULTIPLE TRANSMISSION MEANS MOUNTED IN SAID SION MEANS RESPONSIVE TO ROTATION OF SAID DRIVER MEMBER; (E) CENTRIFUGAL ACTUATING MEANS ROTATABLY MOUNTED IN SAID HUB SHELL AND OPERATIVELY CONNECTED TO SAID TRANSMISSION MEANS FOR CHANGING SAID ONE TRANSMISSION RATIO THEREOF TO ANOTHER ONE OF SAID TRANSMISSION RATIOS WHEN THE ROTARY SPEED OF SAID ACTUATING MEANS DIFFERS FROM A PREDETERMINED SPEED; (F) MOTION TRANSMITTING MEANS IN SAID HUB SHELL AND INTERPOSED BETWEEN THE SAME AND SAID ACTUATING MEANS FOR ROTATING THE LATTER AT A SPEED HIGHER THAN THE SPEED OF SAID HUB SHELL WHEN SAID HUB SHELL ROTATES; (G) WHEREIN TRANSMISSION MEANS INCLUDE A PLURALITY OF MESHINGLY ENGAGED TRANSMISSION MEMBERS, ONE OF SAID TRANSMISSION MEMBERS BEING CONNECTED TO SAID DRIVER MEMBER FOR JOINT ROTATION, AND TWO FREEWHEELING CLUTCH MEANS RESPECTIVELY INTERPOSED BETWEEN TWO OF SAID TRANSMISSION MEMBERS AND SAID HUB SHELL, SAID TWO TRANSMISSION MEMBERS BEING OPERATIVELY CONNECTED FOR SIMULTANEOUS ROTATION AT DIFFERENT SPEEDS, AND SAID ACTUATING MEANS INCLUDE MEANS FOR DISENGAGING ONE OF SAID FREE-WHEELING CLUTCH MEANS WHEN THE ROTARY SPEED OF SAID ACTUATING MEANS DIFFERS FROM SAID PREDETERMINED SPEED.
Claim 2
Dependent Claim
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A MULTIPLE SPEED BICYCLE HUB COMPRISING, IN COMBINATION: (A) A SHAFT HAVING AN AXIS; (B) A DRIVER MEMBER MOUNTED ON SAID SHAFT FOR ROTATION ABOUT THE AXIS THEREOF; (C) A HUB SHELL MOUNTED ON SAID SHAFT AND ROTATABLE ABOUT SAID AXIS; (D) MULTIPLE-RATIO TRANSMISSION MEANS MOUNTED IN SAID HUB SHELL AND INTERPOSED BETWEEN SAID DRIVER MEMBER AND SAID HUB SHELL FOR ROTATING SAID HUB SHELL AT ONE OF THE MULTIPLE TRANSMISSION MEANS MOUNTED IN SAID SION MEANS RESPONSIVE TO ROTATION OF SAID DRIVER MEMBER; (E) CENTRIFUGAL ACTUATING MEANS ROTATABLY MOUNTED IN SAID HUB SHELL AND OPERATIVELY CONNECTED TO SAID TRANSMISSION MEANS FOR CHANGING SAID ONE TRANSMISSION RATIO THEREOF TO ANOTHER ONE OF SAID TRANSMISSION RATIOS WHEN THE ROTARY SPEED OF SAID ACTUATING MEANS DIFFERS FROM A PREDETERMINED SPEED; (F) MOTION TRANSMITTING MEANS IN SAID HUB SHELL AND INTERPOSED BETWEEN THE SAME AND SAID ACTUATING MEANS FOR ROTATING THE LATTER AT A SPEED HIGHER THAN THE SPEED OF SAID HUB SHELL WHEN SAID HUB SHELL ROTATES; (G) WHEREIN TRANSMISSION MEANS INCLUDE A PLURALITY OF MESHINGLY ENGAGED TRANSMISSION MEMBERS, ONE OF SAID TRANSMISSION MEMBERS BEING CONNECTED TO SAID DRIVER MEMBER FOR JOINT ROTATION, AND TWO FREEWHEELING CLUTCH MEANS RESPECTIVELY INTERPOSED BETWEEN TWO OF SAID TRANSMISSION MEMBERS AND SAID HUB SHELL, SAID TWO TRANSMISSION MEMBERS BEING OPERATIVELY CONNECTED FOR SIMULTANEOUS ROTATION AT DIFFERENT SPEEDS, AND SAID ACTUATING MEANS INCLUDE MEANS FOR DISENGAGING ONE OF SAID FREE-WHEELING CLUTCH MEANS WHEN THE ROTARY SPEED OF SAID ACTUATING MEANS DIFFERS FROM SAID PREDETERMINED SPEED.