Detector systems

Claim 2

A detector system for detecting movement of groups of objects along a predetermined path, the distance between any pair of adjacent objects in a group of objects being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects in a group but shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said operator means being actuated by the movement of the objects therepast; and means responsive to the actuation of the operator means during the movement of each group of objects therepast for providing a signal each time a group of objects moves past that operator means.

Claim 3

A detector system for detecting movements of groups of objects along a predetermined path, the distance between any adjacent pair of objects in a group being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects in a group but shorter than the distance between adjacent objects of any pair of adjacent group of objects, said operator means being actuated by the movement of the objects therepast; means responsive to the actuation of said operator means during the movement of each group of objects therepast for providing a signal each time a group of objects moves past said operator means; and means responsive to each pair of successive signals produced by said last-mentioned means for producing a signal each time a pair of groups of objects moves past said operator means.

Claim 4

A detector system for detecting movements of groups of objects along a predetermined path, the distance between any adjacent pair of objects in a group being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects in a group but shorter than the distance between adjacent objects of any pair of adjacent group of objects, said operator means being actuated by the movement of the objects therepast; means responsive to the actuation of said operator means during the movement of each group of objects therepast for providing a signal each time a group of objects moves past said operator means; and means responsive to each pair of successive signals produced by said last-mentioned means for producing a signal each time a pair of groups of objects moves past said operator means.

Claim 5

A detector system for detecting movement of groups of objects in either direction along a predetermined path, the distance between any pair of adjacent objects of a group being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects of a group but shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said operator means being actuated by the movement of the objects therepast; and means responsive to the actuation of said operator means during movement of each group of objects therepast in either direction along the predetermined path for providing a signal each time a group of objects moves past said operator means.

Claim 6

A detector system for detecting movement of groups of objects in either direction along a predetermined path, the distance between any pair of adjacent objects of a group being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects of a group but shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said operator means being actuated by the movement of the objects therepast; and means responsive to the actuation of said operator means during movement of each group of objects therepast in either direction along the predetermined path for providing a signal each time a group of objects moves past said operator means.

Claim 7

A detector system for detecting movement of groups of objects in either direction along a predetermined path, the distance between any adjacent pair of objects in a group being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects in a group but shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said operator means being actuated by the movement of the objects therepast; means responsive to the actuation of said operator means during the movement of each group of objects therepast in either direction along said predetermined path for providing a signal each time a group of objects moves past said operator means; and means responsive to each pair of successive signals produced by said last-mentioned means for producing a signal each time a pair of groups of objects moves past said operator means.

Claim 8

A detector system for detecting movement of groups of objects in either direction along a predetermined path, the distance between any adjacent pair of objects in a group being shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said detector system including: a pair of operator means spaced along the path of movement of said objects a distance greater than the distance between any adjacent pair of objects in a group but shorter than the distance between adjacent objects of any pair of adjacent groups of objects, said operator means being actuated by the movement of the objects therepast; means responsive to the actuation of said operator means during the movement of each group of objects therepast in either direction along said predetermined path for providing a signal each time a group of objects moves past said operator means; and means responsive to each pair of successive signals produced by said last-mentioned means for producing a signal each time a pair of groups of objects moves past said operator means.

Claim 9

A detector system for detecting movement of raIlroad cars over a pair of railroad tracks, said detector system including: a pair of switch means spaced longitudinally along the railroad tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast; and means responsive to the sequential actuation of said switch means during the movement of the wheels on the axles of each truck therepast for providing a signal each time a truck of a railroad car moves past said switch means.

Claim 10

A detector system for detecting movement of raIlroad cars over a pair of railroad tracks, said detector system including: a pair of switch means spaced longitudinally along the railroad tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast; and means responsive to the sequential actuation of said switch means during the movement of the wheels on the axles of each truck therepast for providing a signal each time a truck of a railroad car moves past said switch means.

Claim 11

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a pair of switch means spaced longitudinally along the railroad tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said operator means being actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast; means responsive to the sequential actuation of said switch means during the movement of the wheels on the axles of each truck therepast for providing a signal each time a truck of a railroad car moves past said switch means; and means responsive to each pair of successive signals produced by said responsive means for producing a signal each time two trucks of a railroad car have moved past said switch means.

Claim 12

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a pair of switch means spaced longitudinally along the railroad tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said operator means being actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast; means responsive to the sequential actuation of said switch means during the movement of the wheels on the axles of each truck therepast for providing a signal each time a truck of a railroad car moves past said switch means; and means responsive to each pair of successive signals produced by said responsive means for producing a signal each time two trucks of a railroad car have moved past said switch means.

Claim 13

A detector system for detecting movement of railroad cars of a train of railroad cars over a pair of railroad tracks, said detector system including: a first pair and a second pair of switch means, the switch means of each of said pair of switch means being spaced longitudinally along the railroad tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car and shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, one switch means of each pair of switch means being spaced between the switch means of the other pair of switch means, said switch means each being individually momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast; and means responsive to the sequential actuation of one pair of said switch means during the movement of the wheels on the axles of each truck therepast in one direction along said railroad track and responsive to the sequential actuation of the switch means of the other pair of switch means during the movement of the wheels on the axles of each truck therepast in the opposite direction along said railroad tracks for providing a signal each time a truck of a railroad car moves past said switch means.

Claim 14

A detector system for detecting movement of railroad cars of a train of railroad cars over a pair of railroad tracks, said detector system including: a first pair and a second pair of switch means, the switch means of each of said pair of switch means being spaced longitudinally along the railroad tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car and shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, one switch means of each pair of switch means being spaced between the switch means of the other pair of switch means, said switch means each being individually momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast; and means responsive to the sequential actuation of one pair of said switch means during the movement of the wheels on the axles of each truck therepast in one direction along said railroad track and responsive to the sequential actuation of the switch means of the other pair of switch means during the movement of the wheels on the axles of each truck therepast in the opposite direction along said railroad tracks for providing a signal each time a truck of a railroad car moves past said switch means.

Claim 15

A detector system for detecting movement of railroad cars of a train of railroad cars over a pair of railroad tracks, said detector system including: a first pair and a second pair of switch means, the switch means of each of said pair of switch means being spaced longitudinally along the railroad tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car and shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, one switch means of each pair of switch means being spaced between the switch means of the other pair of switch means, said switch means each being individually momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast; and means responsive to each pair of successive signals produced by said responsive means for producing a signal each time all trucks of a railroad car move past said switch means.

Claim 16

A detector system for detecting movement of railroad cars of a train of railroad cars over a pair of railroad tracks, said detector system including: a first pair and a second pair of switch means, the switch means of each of said pair of switch means being spaced longitudinally along the railroad tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car and shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, one switch means of each pair of switch means being spaced between the switch means of the other pair of switch means, said switch means each being individually momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast; and means responsive to each pair of successive signals produced by said responsive means for producing a signal each time all trucks of a railroad car move past said switch means.

Claim 17

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including; a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of the railroad cars over the tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast to provide an electric signal each time each of said switch means is actuated; a truck counter; gate means for transmitting the signals produced by the momentary closure of said switch means; and gate control means operatively associated with said gate means and said switch means for preventing the transmission of a signal to said truck counter during the actuation of the said first switch means and of the actuation of said second switch means by wheels on axles of a truck other than the last axle of the truck and permitting the transmission of the signal produced by the actuation of said second switch means to said truck counter last by a wheel on the last axle of the truck.

Claim 18

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including; a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of the railroad cars over the tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast to provide an electric signal each time each of said switch means is actuated; a truck counter; gate means for transmitting the signals produced by the momentary closure of said switch means; and gate control means operatively associated with said gate means and said switch means for preventing the transmission of a signal to said truck counter during the actuation of the said first switch means and of the actuation of said second switch means by wheels on axles of a truck other than the last axle of the truck and permitting the transmission of the signal produced by the actuation of said second switch means to said truck counter last by a wheel on the last axle of the truck.

Claim 19

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of the railroad cars over the tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast to provide an electrical signal each time each of said switch means is actuated; a truck counter; gate means for transmitting the signals produced by the momentary closure of said switch means; and gate control means operatively associated with said gate means and said switch means for preventing the transmission of a signal to said truck counter during the actuation of the said first switch means and of the actuation of said second switch means by wheels on axles of a truck other than the last axle of the truck and permitting the transmission of the signal produced by the actuation of said second switch means to said truck counter by a wheel on the last axle of the truck; and a car counter operatively associated with said truck counter, said truck transmitting a control signal to said car counter upon transmittal of two successive signals to said truck counter through said gate means.

Claim 20

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of the railroad cars over the tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the railroad cars during the movement of the wheels therepast to provide an electrical signal each time each of said switch means is actuated; a truck counter; gate means for transmitting the signals produced by the momentary closure of said switch means; and gate control means operatively associated with said gate means and said switch means for preventing the transmission of a signal to said truck counter during the actuation of the said first switch means and of the actuation of said second switch means by wheels on axles of a truck other than the last axle of the truck and permitting the transmission of the signal produced by the actuation of said second switch means to said truck counter by a wheel on the last axle of the truck; and a car counter operatively associated with said truck counter, said truck transmitting a control signal to said car counter upon transmittal of two successive signals to said truck counter through said gate means.

Claim 21

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of railroad cars over the tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast to provide an electric signal each time each of said switch means is actuated; a truck counter; a first AND gate for transmitting signal produced by said first switch means and a first control means for controlling the condition of said first AND gate operatively associated with said first switch means, said first AND gate being initially closed; and a second AND gate for transmitting signal produced by said second switch means and second control means for controlling the condition of said second AND gate operatively associated with said second switch means, said second AND gate being initially opened, said second AND gate being operatively associated with said first control means and said truck counter and when open transmitting signal to said truck counter and to said first control means to cause said first control means to close said first AND gate; said first AND gate when open transmitting signals to said second control means to cause said second control means to close said second AND gate, said first gate control opening said first AND gate when said first switch means is momentarily actuated and said second gate control opening said second gate means when said second switch means is momentarily closed.

Claim 22

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of railroad cars over the tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast to provide an electric signal each time each of said switch means is actuated; a truck counter; a first AND gate for transmitting signal produced by said first switch means and a first control means for controlling the condition of said first AND gate operatively associated with said first switch means, said first AND gate being initially closed; and a second AND gate for transmitting signal produced by said second switch means and second control means for controlling the condition of said second AND gate operatively associated with said second switch means, said second AND gate being initially opened, said second AND gate being operatively associated with said first control means and said truck counter and when open transmitting signal to said truck counter and to said first control means to cause said first control means to close said first AND gate; said first AND gate when open transmitting signals to said second control means to cause said second control means to close said second AND gate, said first gate control opening said first AND gate when said first switch means is momentarily actuated and said second gate control opening said second gate means when said second switch means is momentarily closed.

Claim 23

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of railroad cars over the tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast to provide an electric signal each time each of said switch means is actuated; a truck counter; a first AND gate for transmitting signals produced by said first switch means and a first control means for controlling the condition of said first AND gate operatively associated with said first switch means, said first AND gate being initially closed; and a second AND gate for transmitting signal produced by said second switch means and second control means for controlling the condition of said second AND gate operatively associated with said second switch means, said second AND gate being initially opened, said second AND gate being operatively associated with said first control means and said truck counter and when open transmitting signal to said truck counter and to said first control means to cause said first control means to close said first AND gate; said first AND gate when open transmitting signals to said second control means to cause said second control means to close said second AND gate, said first gate control opening said first AND gate when said first switch means is momentarily actuated and said second gate control opening said second gate means when said second switch means is momentarily closed; and a car counter operatively associated with said truck counter, said truck counter actuating said car counter upon transmittal of two successive signals to said truck counter through said second AND gate.

Claim 24

A detector system for detecting movement of railroad cars over a pair of railroad tracks, said detector system including: a first switch means; a second switch means spaced longitudinally from said first switch means along the railroad tracks in the direction of movement of railroad cars over the tracks a distance greater than the distance between any adjacent pair of axles of a truck of a railroad car but shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, said switch means being momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast to provide an electric signal each time each of said switch means is actuated; a truck counter; a first AND gate for transmitting signals produced by said first switch means and a first control means for controlling the condition of said first AND gate operatively associated with said first switch means, said first AND gate being initially closed; and a second AND gate for transmitting signal produced by said second switch means and second control means for controlling the condition of said second AND gate operatively associated with said second switch means, said second AND gate being initially opened, said second AND gate being operatively associated with said first control means and said truck counter and when open transmitting signal to said truck counter and to said first control means to cause said first control means to close said first AND gate; said first AND gate when open transmitting signals to said second control means to cause said second control means to close said second AND gate, said first gate control opening said first AND gate when said first switch means is momentarily actuated and said second gate control opening said second gate means when said second switch means is momentarily closed; and a car counter operatively associated with said truck counter, said truck counter actuating said car counter upon transmittal of two successive signals to said truck counter through said second AND gate.

Claim 25

A detector system for detecting movement of railroad cars of a train of railroad cars over a pair of tracks, said detector system including: a first pair of switch means and a second pair of switch means, the switch means of each of said pair of switch means being spaced longitudinally along the tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car and shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, one switch means of each pair of switch means being spaced between the switch means of the other pair of switch means, said switch means each being individually momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast; a first AND gate for transmitting signals produced by the switch means of each pair of switch means which is not positioned between the switch means of the other pair of switch means; first control means for controlling the condition of said first AND gate; a second AND gate for transmitting signals produced by said switch means of each of the pairs of switch means which are positioned between the switch means of the other pair of switch means; second control means for controlling the condition of said second AND gate; third control means between said switch means and said first and second AND gates and their control means for controlling transmission of signals from said switch means to said first and second AND gates and their control means; and means for periodically resetting said third control means to a condition wherein said third control means prevents transmission of signals from said second pair of switch means to said first and second AND gates and their control means and permits transmittal of signals from said first switch means to said first and second AND gates and their control means when the railroad cars are moving in one direction on the tracks, said third control means being responsive to the closure of the switch means of said second pair of switch means which is not positioned between the switch means of said first pair of switch means when said railroad cars are moving in the opposite direction on the tracks to block the transmittal of signals from said first pair of switch means to said first and second AND gates and their control means and to permit transmittal of signals from said second pair of switch means to said first and second AND gates and their control means; and a truck counter; said first AND gate being initially in closed condition and said second AND gate being initially in open position, said second AND gate being operatively associated with said first control means and said truck counter and when open transmitting signals to said truck counter and to said first control means to cause said first control means to close said first AND gate, said first AND gate being operatively associated with said second control means and when open transmitting signals to said second control means to cause said second control means to close said second AND gate, said first gate control being operatively associated with the switch means of said first pair of switch means which is not between said second pair of switch means and opening said first AND gate when the railroad cars are moving in said one direction and the switch means of said first pair of switch means which is not between second pair of switch means is actuated, said second control means opening said second AND gate when the switch means of said first switch means which is between the said second pair of switch means is momentarily actuated when the railroad cars are moving in, said one direction, said first control means being operatively associated with the switch means of said second pair of switch means which is not between said first pair of switch means and opening said first AND gate when the railroad cars are moving in a direction opposite said one direction and the switch means of said second pair of switch means which is not disposed between the said first pair of switch means is momentarily actuated, said second control means opening said second gate means when the switch means of said second pair of switch means which is between said first pair of switch means is actuated when the railroad cars are moving in the direction opposite said one direction.

Claim 26

A detector system for detecting movement of railroad cars of a train of railroad cars over a pair of tracks, said detector system including: a first pair of switch means and a second pair of switch means, the switch means of each of said pair of switch means being spaced longitudinally along the tracks a distance greater than the distance between any pair of adjacent axles of a truck of a railroad car and shorter than the distance between adjacent axles of any pair of adjacent trucks of the railroad cars, one switch means of each pair of switch means being spaced between the switch means of the other pair of switch means, said switch means each being individually momentarily actuated by wheels on the axles of the trucks of the railroad cars during the movement of the wheels therepast; a first AND gate for transmitting signals produced by the switch means of each pair of switch means which is not positioned between the switch means of the other pair of switch means; first control means for controlling the condition of said first AND gate; a second AND gate for transmitting signals produced by said switch means of each of the pairs of switch means which are positioned between the switch means of the other pair of switch means; second control means for controlling the condition of said second AND gate; third control means between said switch means and said first and second AND gates and their control means for controlling transmission of signals from said switch means to said first and second AND gates and their control means; and means for periodically resetting said third control means to a condition wherein said third control means prevents transmission of signals from said second pair of switch means to said first and second AND gates and their control means and permits transmittal of signals from said first switch means to said first and second AND gates and their control means when the railroad cars are moving in one direction on the tracks, said third control means being responsive to the closure of the switch means of said second pair of switch means which is not positioned between the switch means of said first pair of switch means when said railroad cars are moving in the opposite direction on the tracks to block the transmittal of signals from said first pair of switch means to said first and second AND gates and their control means and to permit transmittal of signals from said second pair of switch means to said first and second AND gates and their control means; and a truck counter; said first AND gate being initially in closed condition and said second AND gate being initially in open position, said second AND gate being operatively associated with said first control means and said truck counter and when open transmitting signals to said truck counter and to said first control means to cause said first control means to close said first AND gate, said first AND gate being operatively associated with said second control means and when open transmitting signals to said second control means to cause said second control means to close said second AND gate, said first gate control being operatively associated with the switch means of said first pair of switch means which is not between said second pair of switch means and opening said first AND gate when the railroad cars are moving in said one direction and the switch means of said first pair of switch means which is not between second pair of switch means is actuated, said second control means opening said second AND gate when the switch means of said first switch means which is between the said second pair of switch means is momentarily actuated when the railroad cars are moving in, said one direction, said first control means being operatively associated with the switch means of said second pair of switch means which is not between said first pair of switch means and opening said first AND gate when the railroad cars are moving in a direction opposite said one direction and the switch means of said second pair of switch means which is not disposed between the said first pair of switch means is momentarily actuated, said second control means opening said second gate means when the switch means of said second pair of switch means which is between said first pair of switch means is actuated when the railroad cars are moving in the direction opposite said one direction.

Claim 27

The detector system of claim 13, and a car counter operatively associated with said truck counter and actuated by said truck counter each time two successive signals are transmitted to said truck counter by said second AND gate.

Claim 28

The detection system of claim 14, and controlled means operatively associated with said car counter and operable by said car counter each time said car counter is actuated.

Claim 29

The detector system of claim 14, and weighing means for weighing the load supported by the wheels on each axle, and moving over said track means for operating said weighing means each time a pair of wheels moves over said weighing means to provide a signal which varies in accordance with said load; and means operatively associated with said last-mentioned means and said truck counter for adding the loads supported by The wheels of each car after the wheels on the last axle of the last truck of each car move past said switch means.