Engine sound simulator
First Claim
1. An engine sound simulating apparatus for a vehicle having drive means powered by an electric motor to propel the vehicle in a desired path, said drive means having a rotatable member that rotates in direct proportion to the speed of the vehicle comprising:
- digital switch sensor means responsive to the speed of rotation of the rotatable member for producing an output signal having a frequency proportional to the speed of the vehicle, signal converting means for receiving said output signal and converting said signal to a signal having a frequency that changes in response to ranges of speed of the vehicle, transmitter means connected to the signal converting means to transmit signals from the signal converting means, a plurality of receiver means located adjacent the path along which the vehicle is propelled for receiving the transmitted signals, said receiver means having speaker means providing an audio output simulating the operation of an engine powering the vehicle.
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Accused Products
Abstract
A remote controlled car driven by an electric motor energized with a battery has an internal combustion engine sound simulator that transmits signals to one or more remote receivers having audio outputs that simulate an internal combustion engine driving the car. The engine sound simulating apparatus has a digital switch sensor responsive to the speed of rotation of the drive wheel of the vehicle for producing an output signal. A signal converting circuit receives the output signal from the digital switch sensor and provides a signal having a frequency that changes in response to ranges of speed of the car. A transmitter means connected to the signal converting circuit transmits the signals to the remote located receivers. The receivers have speakers for producing an audible output simulating the operation of an internal combustion engine.
123 Citations
24 Claims
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1. An engine sound simulating apparatus for a vehicle having drive means powered by an electric motor to propel the vehicle in a desired path, said drive means having a rotatable member that rotates in direct proportion to the speed of the vehicle comprising:
- digital switch sensor means responsive to the speed of rotation of the rotatable member for producing an output signal having a frequency proportional to the speed of the vehicle, signal converting means for receiving said output signal and converting said signal to a signal having a frequency that changes in response to ranges of speed of the vehicle, transmitter means connected to the signal converting means to transmit signals from the signal converting means, a plurality of receiver means located adjacent the path along which the vehicle is propelled for receiving the transmitted signals, said receiver means having speaker means providing an audio output simulating the operation of an engine powering the vehicle.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An engine sound simulating apparatus comprising:
- a vehicle having at least one drive wheel, an electric motor, a source of electric power, control means operably connecting the source of electric power to the electric motor to operate the motor, power transmitting means connecting the drive wheel and electric motor whereby on operation of the electric motor the drive wheel rotates to move the vehicle on a support surface in a desired path, said power transmitting means having a member rotatable in proportion to the speed of the vehicle, an internal combustion engine sound simulating means responsive to the speed of rotation of the member to transmit signals, receiver means located adjacent the path along which the vehicle is moved for receiving the transmitted signals, said receiver means having speaker means providing an audio output simulating the operation of an internal combustion engine powering the vehicle.
- View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
- 18. In combination, an endless track having a surface, a vehicle having wheels engageable with said surface, said vehicle having an electric motor, power means drivably connecting said motor to at least one of said wheels, a source of electric power, and control means operably connecting the source of electric power to the electric motor to operate said motor and thereby driving said one of said wheels to move the vehicle around said endless track, a remote control operated means operable to effect steering of said vehicle and operation of said control means, an internal combustion engine sound simulating means responsive to the speed of operation of said electric motor to transmit signals of varying frequencies corresponding to speed ranges of said motor, a plurality of receiver means spaced about said endless track for receiving said transmitted signals, said receiver means having speaker means providing an audio output simulating the operation of an internal combustion engine powering the vehicle.
Specification