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. The top of the drum accommodating section positioned directly above the rotary drum is provided with a display window of a slit-like form along the axial direction of the rotary drum, the display window being provided with running distance indicating graduations permitting the rate of increase of the colored indicating surface appearing on the display window with the rotation of said rotary drum to be read out in terms of the running distance.
What is claimed as new and desired to be secured by Letters Patent of the United States is: 1. An indoor running machine comprising: a machine body having a drum accommodating section formed at its front edge; a vertically movable footboard provided on top of the body on the rear end side of said drum accommodating section and spring biased in the upward direction; a ratchet gear provided within the body and means associated with said movable footboard and body adapted to rotate said ratchet gear pitch by pitch with the vertical movement of said 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 wheel by means of a series of large and small transmitting gears, the outer periphery of said rotary drum being 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, the top of said drum accommodating section positioned directly above said rotary drum being provided with an display window of a slit-like form along the axial direction of the rotary drum, said display window being provided with running distance indicating graduations permitting the rate of increase of the colored indicating surface appearing on the display window with the rotation of said rotary drum to be read out in terms of the rnning distance.