Measuring and testing – Speed – velocity – or acceleration – Structural installation or mounting means
Patent
1978-08-21
1979-12-25
Watkins, Donald
Measuring and testing
Speed, velocity, or acceleration
Structural installation or mounting means
73527, G01P 102
Patent
active
041799356
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a cycle provided with a speedometer.
Cycles provided with speedometers indicating an instantaneous travelling speed and/or a total number of kilometers travelled are known.
Certain of these speedometers are driven from a pulley which is fixed to one of the disks or blocks of the hub of the cycle wheel and which drives via an endless belt the pulley of the speedometer, which is itself fixed to one of the arms of the fork constituting the support of the axle of said wheel.
However, such devices have disadvantages, mainly due to the fact that prior to the assembly of the wheel or after its reassembly, it is necessary to remove or install the endless belt for driving the speedometer.
This operation is far from easy, in view of the fact that the belt is taut between said two pulleys and is virtually inextensible making it necessary to loosen the clamp for fixing the speedometer to the frame, followed by the repositioning of said speedometer in order to place the belt under tension, the two driving pulleys being located in the same plane.
Furthermore, during these wheel assembly and disassembly operations, the belt can become lost or damaged.
The object of the present invention is to obviate these disadvantages and to this end relates to a cycle provided with a counter which comprises a clamp having an opening for its fixing of the shaft of the wheel hub.
According to another feature of the invention, the opening in the clamp is provided with an internal pin which can be located in a longitudinal groove formed on the axle of the wheel hub.
The invention is illustrated in exemplified and non-limitative manner in the attached drawings, wherein show:
FIG. 1 a partial side view of the fork of the front wheel of a cycle provided with a speedometer.
FIG. 2 a view from the left of FIG. 1 which also shows in section the driving pulley fixed on the hub.
The object of the present invention is to provide a device which ensures the positioning of the speedometer and more particularly its driving pulley at a constant distance from the wheel hub axle, i.e. the driving pulley fixed to the hub of said wheel, no matter whether the wheel is fixed to the arms of the fork of the cycle or not.
Thus, this arrangement makes it possible to assemble and disassemble the wheel without losing the initial setting and then resetting the position of the speedometer, whereby during these operations the driving belt which passes over the two pulleys of the hub and the speedometer remain constantly in place and under tension.
The drawings show branch 1 of a front fork of a cycle on which is mounted in rotary manner the front wheel 2, provided with spokes 3 and a hub 4, whereof one of the blocks 5 is externally provided with a pulley 6 fixed to said block by random means and for example by means of hooks 7. Speedometer 8, which is provided with driving pulleys 9, is driven by means of an endless belt 10 from pulley 6.
According to the invention, speedometer 8 is mounted on a clamp 11, provided with an opening 12, corresponding to the diameter of axle 13 of hub 4 of the wheel.
This opening 12 also has an internal pin 14 which can be located in a correspondingly shaped groove 15 provided longitudinally on axle 13.
Clamp 11, fitted on axle 13, whilst it is locked longitudinally between on the one hand cone 16 serving to regulate the ball bearing of the hub and on the other nut 17.
Nut 17 serves as a support for clamp 1.sub.1 of branch 1 of the fork which is fixed to axle 13 by a nut 18.
In this arrangement, clamp 11 of the support is disposed on axle 13 between block 5 of hub 4 and clamp 1.sub.1 of branch 1 of the fork.
Block 11 is also provided with a slide for the mounting of speedometer 8, said slide being constituted by the parallel edges 19 located in lateral grooves formed on a rib 20 of the speedometer.
The parallel edges 19 are parallel to axle 13 of the wheel, in such a way that one of the pulleys 9 can be positioned in the plane of the groove of pulley 6.
Once the setting has been made, speedometer 8 is locked in p
REFERENCES:
patent: 508941 (1893-11-01), Hilliard
patent: 537896 (1895-04-01), Loew
patent: 567260 (1896-09-01), Boon
patent: 588726 (1897-08-01), Burdick
patent: 597272 (1898-01-01), Edwards
patent: 627589 (1899-06-01), Moon
patent: 670432 (1901-03-01), Powers
patent: 745726 (1903-12-01), Hathaway
patent: 2788763 (1957-04-01), Ries
Etablissements Huret & Ses Fils
Watkins Donald
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