Signal Device Indicating Driving Status of a Car

The present invention relates generally to a signal device indicating driving status of a car and more particularly to a signal device comprising two series of rear lights of different colors lined up alternatively with each other, lighting and extinguishing of each series responding to the up/down movement of the accelerator pedal, to reflect the car being in accelerating or decelerating condition. A gravity switch is further provided in the device to predict a sudden braking.

A lot of signal lights have now been disposed at the rear of a car each indicating turning direction, braking, etc. However, none has been able to warn a succeeding car of the driving status of the leading car such as accelerating, decelerating, ready to brake, to enable the succeeding car to take precautions to keep a safe distance from the preceeding car to avoid unnecessary accidents. Knowledge of these matters is especially desirable when visibility is poor.

Therefore the main object of the present invention is to provide a signal device which will indicate clearly the driving status of a preceeding car and the intention of the driver of the said preceeding car, by two series of signal lights of different color and responding to the movement of the accelerator pedal, to avoid a collision.

Another object of the present invention is to provide a further signal light responding to the sudden release of the accelerator pedal through a gravity switch to predict emergency braking of a preceeding car so that the succeeding car may take precaution to keep at a safe distance from the preceeding car.

Other objects and features of the present invention will become apparent from the following description to be taken in conjunction with the accompanying drawings.

FIG. 1 depicts a schematic diagram showing the layout of the signal device of the present invention in a car;

FIG. 2 showing an longitudinal sectional view of a preferred embodiment of the switch means of the signal device of the present invention;

FIG. 3 depicts a cross-sectional view of the switch means of the embodiment in FIG. 2;

FIG. 4 is a perspective view showing the alternative arrangement of the two series of signal lights with parts cut away to indicate the details;

FIG. 5 is a cross-sectional view of the said light in FIG. 4;

FIG. 6 depicts a wiring diagram of the signal device of concern; and DETAILED

FIG. 7 dipicts a further way to mount the switch means of the said device.

Now referring to FIG. 1, the switch means 4 of the signal device of the present invention is pivotally associated with the accelerator pedal and mounted near the engine 2 of the car 1, and signal lights 5 of the device are disposed at rear of the car with electric wiring L connected to the switch means 4.

The details of the switch means 4 may be seen from FIG. 2 and 3. The upper end of a male threaded rod 41 is pivotally connected to the under side of an accelerator pedal 3 through a pin joint 411 the said pedal 3 being biased with a spring 31. The male threaded portion is screwed into a female threaded cylinder 42 so that the relative position between the pedal 3 and switch means 4 may be adjusted. Into the lower end of the female threaded cylinder 42, a further section of male threaded rod 41a is screwed. A swivel eye hole 6 is provided at lower end of rod 41a for the connection of the linkage 32 ordinarily provided to actuate the throttle of carburetor, the threaded rod 41a also enabling adjustment of distance lengthwise. Along the outside wall of cylinder 42, two protruded cam means 421a and 421b are disposed at opposed positions and arranged stepwisely relative to the cylinder; in other words, cam 421a is located somewhat closer to the middle section of cylinder 42 while cam 421b closer to the upper section. Cam means 421a and 421b serve to actuate respectively separate series of switches 462a and 462b embedded in insulation blocks 461 and generally numbered as 46. Switches 462a associated with cam means 421a constitute a part of circuit led out with wire 1a for one series of signal lights R (FIG. 6) and switches 462b associated with cam means 421b constitute a part of circuit led out with wire 1b for another series of signal lights B (FIG. 6). Cylinder 42 and switch blocks 46 are all enclosed in a pair of flanged semi-cylindrical halves 45-45, which are jointed together with bolt and nut 451-451. The casing halves 45-45 have recess 452 to take switch series 46aand 46b. Also grooves 453-453 serve as guides for ribs 422-422 formed at diametrically opposed positions on the outside wall of cylinder 42 and extending all through the length of the cylinder so that the rod 41 may slide freely along inside the casing 45 synchronous with the up/down movement of the pedal 3. Lugs 47-47 are provided outside the casing halves 45-45 for mounting the casing 45 on appropriate part of the chassis of the car.

Inside lower end of rod 41, a cylindrical recess is provided for a weight 44 to be slidable freely therein along the axle direction of the rod 41. The weight piece 44 having a projected lower end 441 and being of insulation material, end 441 keeps a switch means 442 in normal open condition. When there is sudden release of the pedal 3, the weight piece 44 will be lifted with up movement of the rod 41 and let switch 442 close to light a light Y (FIG. 6) through wire 1 to give the warning of emergency braking.

In FIGS. 4 and 5, the construction of the series of signal lights 5 is illustrated. The lights are housed in a casing 51 and covered with lens 58. Insulation plate 52 is provided for mounting the lamp socket 53 into which lamp bulb 54 is inserted. Each light is provided with an individual reflector 56, and partition plates 55 are provided between lights. Between reflector 54 and lens 58, transparent color plates 57R (Red), 57B (Blue) and 57Y (Yellow) are placed as required. Red and Blue lights are alternatively arranged and a yellow light is at the end of the row.

FIG. 6 gives the wiring diagram of the present invention which is self-explanatory. Solid lined cylinder 42 showing the up position of the pedal, just the same as shown in FIG. 2, when all red lights are on. Stepping down of the pedal 3, extinguishes the red light one by one while the blue lights go on one by one, until the pedal 3 reaches the lower most position, (dotted line position), where all red lights are extinguished and all blue lights on. Upon sudden release of pedal 3 for emergency braking, the yellow light would be on for a time duration equal that of travelling of weight piece 41 being lifted up with the up movement of the cylinder 42 then falling under gravity to resume its original position in the rod 41, with end 441 of weight piece 41 again opening the switch 442. At that time, all red lights come on. The wiring diagram is a single line diagram with another line grounded. Battery 7 is provided herewith to indicate the electricity source.

In FIG. 7, the switch means 4 is shown being mounted separately from the linkage 32 provided to actuate the throttle of carburetor, but independently connected under the pedal 3, thus simplified the way of mounting.

The above embodiment is given only for illustration purposes and not by way of limitation and modifications evident to those skilled in the art will fall within the scope of attached claims.