×

Road safety installation with emission of sound messages

  • US 4,816,827 A
  • Filed: 12/07/1987
  • Issued: 03/28/1989
  • Est. Priority Date: 04/14/1986
  • Status: Expired due to Fees
First Claim
Patent Images

1. Road safety installation with emission of sound messages, comprising, for every type of signalling panel fixed along a road, a fixed emitter device (1) emitting a coded infrared radiation signal (i) corresponding to the type of signalling panel (P) to which it is associated and, on every vehicle (2) circulating along the road, a receiver device (3) receiving the coded infrared radiation signal (i) delivered by the fixed emitter device (1) and converting the signal into a clear sound message emitted for the attention of the driver of the vehicle, the emitter device (1) comprises source of power (4) feeding, via an encoder (5), an infrared radiation emitter (6), so that the device (1) delivers, in the direction of the vehicles arriving on the road, the coded infrared signal (i), and a sound level detector or sound sensor (7) which controls a normally open switch (7a), which is closed in order to start the emitter device (1) in operation, when the sound sensor (7) perceives the noise (a) emitted by the engine (8) of a vehicle (2), and the receiver device (3) comprises an infrared radiation sensor (9) which is mounted on the vehicle, at the front part thereof, inside or outside, said infrared sensor being connected by a filtering circuit (11) to a decoder (12) of which the output is connected to a selector (13) of the appropriate sound message.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×