1
Callahan Bernard E: Vehicle data recorder employing data compression. Vapor Corporation, Liss Morris, February 4, 1975: US3864731 (16 worldwide citation)

An axle pickup generates signals each time a vehicle travels a predetermined distance. Means are provided for measuring distance travelled as well as measuring changes in vehicle speed. If the speed has varied between sequential signals, or if particular events are detected during sequential signals ...


2
Vehicle data recorder employing data compression. Vapor, July 20, 1977: GB1480143-A (1 worldwide citation)

1480143 Vehicle tachograph VAPOR CORP 17 June 1974 [16 July 1973] 08638/77 Divided out of 1480141 Headings G1J and G1N A vehicle tachograph is as described in the Parent Specification. The claims relate to the advancement of the tape drive 68 in response to at least one input signal to the OR gate 5 ...


3
Vehicle data recorder employing data compression. Vapor, February 14, 1975: FR2237795-A1 (1 worldwide citation)

An axle pickup generates signals each time a vehicle travels a predetermined distance. Means are provided for measuring distance travelled as well as measuring changes in vehicle speed. If the speed has varied between sequential signals, or if particular events are detected during sequential signals ...


4
Callahan Bernard E: Enregistreurs de donnees de trafic a condensation de donnees, Vehicle data recorder employing data compression. Vapor Corporation, July 31, 1979: CA1059619

INVENTOR: BERNARD E. CALLAHAN TITLE: VEHICLE DATA RECORDER EMPLOYING DATA COMPRESSION ABSTRACT OF THE DISCLOSURE: An axle pickup generates signals each time a vehicletravels a predetermined distance. Means are provided for measur-ing distance travelled as well as measuring changes in vehiclespeed. I ...


5

6
Vehicle data recorder employing data compression. Vapor, July 20, 1977: GB1480141-A

1480141 Vehicle tachograph VAPOR CORP 11 June 1974 [16 July 1973] 26770/74 Heading G1J and G1N A vehicle data recorder includes an axle pick-up 6 producing a train of pulses representative of the speed of a wheel of the vehicle, and at least one other sensor 40 monitoring, for example, regenerative ...