AT6972B - Bicycle crank. - Google Patents

Bicycle crank.

Info

Publication number
AT6972B
AT6972B AT6972DA AT6972B AT 6972 B AT6972 B AT 6972B AT 6972D A AT6972D A AT 6972DA AT 6972 B AT6972 B AT 6972B
Authority
AT
Austria
Prior art keywords
lever
pedal
crank
spring
arm
Prior art date
Application number
Other languages
German (de)
Inventor
Berthold Weichmann
Original Assignee
Berthold Weichmann
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Berthold Weichmann filed Critical Berthold Weichmann
Application granted granted Critical
Publication of AT6972B publication Critical patent/AT6972B/en

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  • Steering Devices For Bicycles And Motorcycles (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Fahrradkurbel. 



   Die anliegende Zeichnung veranschaulicht den Anmeldungsgegenstand und zeigt in Fig. 1 ein mit einer beim Treten sich verlängernden Kurbel versehenes Fahrrad, in
Fig. 2 und 3 die Einrichtung der Kurbel selbst in Vorderansicht und im Grundriss. 
 EMI1.1 
 weise durch einen Schraubenstift c. befestigt. Mit dieser Kurbel b ist bei e ein doppelarmiger Trethebel d verbunden, der an seinem einen Ende das Pedal trägt, und dessen anderes, über die   Tretkurbol. achse hinausragondes Ende mit   dem freien Ende der   Kurbel 11   durch eine beim Treten sich   zusammendrückende   Feder verbunden ist. 



   Infolge der Anordnung der beiden doppelarmigen Hebel b, d und der Zwischen-   schaltung der Feder g zwischen die freinen Enden dieser beiden Hebel, beginnt die Ver-     längerung   der Kurbel sofort, sobald der   Trethebel   seine höchste Lage überschritten hat, denn in diesem Moment findet durch den Druck auf das   Pedal eine Drohung des Hebels d   um seinen Drehpunkt e und damit das Grösserwerden des Momentenarmes : x statt. 



   Die Verlängerung des Pedals nimmt ganz allmählich auf dem halben   Arbeitsgangs   
 EMI1.2 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Bicycle crank.



   The attached drawing illustrates the subject of the application and shows in FIG. 1 a bicycle provided with a crank which lengthened when pedaling, in
2 and 3 the device of the crank itself in front view and in plan.
 EMI1.1
 wise by a screw pin c. attached. With this crank b, a double-armed pedal lever d is connected at e, which carries the pedal at one end, and the other, via the pedal crank. Axis hinragondes end is connected to the free end of the crank 11 by a spring compressing when pedaling.



   As a result of the arrangement of the two double-armed levers b, d and the interposition of the spring g between the free ends of these two levers, the lengthening of the crank begins immediately as soon as the pedal lever has passed its highest position, because at this moment it takes place the pressure on the pedal a threat of the lever d around its pivot point e and thus the increase of the moment arm: x instead of.



   The extension of the pedal decreases very gradually on the halfway point
 EMI1.2
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

Fahrradkurbel mit veränderlicher Kurbellänge, bei welcher ein Trethebel an einen auf der Achse befestigten Hebel angelenkt ist und mit diesem durch eine Feder in Verbindung steht, dadurch gekennzeichnet, dass beide Hebel mit über die Drehachse de & Kurbelaruies hinaus verlängerten Armen versehen sind, zwischen welchen die Feder eingeschaltet ist, so dass der Hebelarm des Pedallhebels, auf den die Feder wirkt, so lange wird. dass das Moment ans Federkraft und Hebelarm imstande ist, dem auf das Pedal beim langsamen Fahren wirkenden Druck zu widerstehen, und eine Verlängerung des PedalhebelsbeimscharfenTretennurallmählicherfolgenkann. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. Bicycle crank with variable crank length, in which a pedal lever is articulated to a lever attached to the axle and is connected to it by a spring, characterized in that both levers are provided with arms extended beyond the axis of rotation of the crank arm, between which the Spring is switched on, so that the lever arm of the pedal lever on which the spring acts is so long. that the moment on the spring force and lever arm is able to withstand the pressure acting on the pedal when driving slowly, and lengthening of the pedal lever can only gradually take place when pedaling sharply. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT6972D 1900-07-13 1900-07-13 Bicycle crank. AT6972B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT6972T 1900-07-13

Publications (1)

Publication Number Publication Date
AT6972B true AT6972B (en) 1902-03-10

Family

ID=3497422

Family Applications (1)

Application Number Title Priority Date Filing Date
AT6972D AT6972B (en) 1900-07-13 1900-07-13 Bicycle crank.

Country Status (1)

Country Link
AT (1) AT6972B (en)

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