Abstract: A system and a method for counting the number of people passing a entry point in a predetermined direction. The system includes a foot-activated, pressure sensitive platform deployed at the entry point for providing a time-dependent pressure profile vector indicative of the manner in which a person arches one of his feet prior to at least partially stepping off the platform. The pressure profile vector is processed for determining whether the person completely passed through the entry point in the predetermined direction. In the affirmative case, a counter for recording the number of people completely passing through the entry point in the predetermined direction is incremented. The system can be adapted for providing a net count of the instantaneous number of people in a given area during the entering and leaving of people through an entry point into and from the given area.

Abstract: A toy race track and lap counter comprising a track with adjacent lanes each forming a complete circuit and racing objects which are propelled around the track by pressurized air controllably discharging from separate nozzles in a propulsion tower. Separate air impulse devices are provided for each player for controlling the timing and intensity of each burst of pressurized air against that player's racing object as it passes by the propulsion tower and beneath the nozzles. A plurality of propulsion towers may also be provided which are operably interconnectable whereby simultaneous air bursts are applied at more than one location around the track by each player by manually timing the activation of that player's air impulse device.

Abstract: An exercise supervision device for recording the number of footsteps taken by a jogger while running in place on the device includes a linearly depressible jogging surface and a rotatively operable counter and structure directly connecting the jogging surface and counter for converting the linear motion of the jogging surface to a rotative traverse effective to operatively increment the counter.

Abstract: The number of steps taken while walking are counted by straining a fatigue life gauge to change its electrical resistance each time the device is stepped on by a subject. The change in resistance of the fatigue life gauge is measured to ascertain the approximate number of steps taken.

Abstract: An indoor running machine comprising a machine body having a drum accommodating section formed at the front edge; a vertically movable footboard provided on top of the body on the rear end side of the drum accommodating section and spring biased in the upward direction; a ratchet gear provided within the body and adapted to rotate pitch by pitch with the vertical movement of the footboard; and a rotary drum provided within the drum accommodating section of the body and adapted to be coupled to the rotation of the ratchet gear via a series of large and small transmitting gears. The outer periphery of the rotary drum is provided with a colored indicating surface of increasing width from one end to the other end in the direction of the axis opposite to the direction of rotation.