Matches 1 - 24 out of 24


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5247297 Vehicle detector method for multiple vehicle counting  
An estimate of the number of vehicles crossing a loop inductor having one or more interconnected discrete loops of the type found in vehicle detector system installations. A measuring signal...
4787243 Device for detecting a dimension, in particular a tread width on a path  
The device comprises: an elongate support part (4) suitable for being embedded in the path and having a low upstanding wall (17) running along the edge thereof; a plate (30) cantilevered out from...
3836071 AIR-OPERATED TRAFFIC COUNTER  
A traffic counter is actuated by the piston rod of an air motor, wherein pulses of air from an air hose across a roadway reciprocate the piston. Piston control and anti-bounce valves are provided...
3748443 WHEEL SENSING APPARATUS  
A treadle consisting of a set of upper contacts electrically separated from a set of lower contacts and placed in staggered arrangement with the lower set. The lower set has a fixed impedance...
3707264 SPRING DRIVEN TRAFFIC COUNTER  
A register driven by a spring motor produces a half count for each pulse from a pneumatic tube by means of a pneumatically driven escapement mechanism.
3105221 Traffic counting apparatus  
3081941 Parking control system  
3079077 Multilane traffic counter  
3045909 Pulsed ultrasonic detector  
3042303 Object or vehicle detection system  
3037696 Toll highway recorder  
3024443 Traffic speed monitor  
2992776 Traffic counting device  
2917283 Traffic control apparatus for a closed area  
2907521 Toll highway recorder  
2878998 Coin controlled barrier gate mechanism for vehicles  
2866600 Sonic vehicle counter  
2847562 Car actuated circuit controller  
2829832 Vehicle counters  
2826363 Railway traffic counter  
2807418 Vehicle registering device  
2801053 Traffic counters  
2784911 Treadle controlled toll checking systems  
2782990 Motor vehicle counters  
Matches 1 - 24 out of 24