Ratio computer

In a ratio computer for use with a measuring device having transducer means for generating a pulse for each increment of movement of a movable member associated with said measuring device, the combination comprising first counter means for counting the pulses from said transducer, a source of reference pulses, second counter means connected to said source for counting said reference pulses, time base selector means connected to said second counter means and operative to produce a coincidence signal when said second counter means has counted a preselected number of reference pulses, indicator means, control means connected to said indicator means, said first counter means and said selector means to cause said indicator means to generate a display related to the number of pulses counted by said first counter means during the interval ending with the production of said coincidence signal, means for causing said source of reference pulses to produce only a single pulse at a predetermined time whereby setting said time base selector means to a preselected number greater than unity causes said control means connected to said indicator means and said first counter means to control said indicator means to display the number of pulses counted by said first counter means while said first counter means is counting said pulses from said transducer so that the number of pulses displayed by said indicator means is proportional to the displacement of said movable member from its position at the time of said single pulse, and switch means connected with said first counter means and said second counter means for simultaneously initiating counting by said first and second counter means.

In a ratio computer for use with a measuring device having transducer means for generating a pulse for each increment of movement of a movable member associated with said measuring device, the combination comprising first counter means for counting the pulses from said transducer, a source of reference pulses, second counter means connected to said source for counting said reference pulses, time base selector means connected to said second counter means and operative to produce a coincidence signal when said second counter means has counted a preselected number of said reference pulses, indicator means, control means connected to said indicator means, said first counter means and said selector means to cause said indicator means to generate a display related to the number of pulses counted by said first counter means during the interval ending with the production of said coincidence signal, switch means, and logic means interconnecting and said switch means, said transducer, said source of reference pulses, said first counter means and second counter means, said logic means comprising a bistable device having two stable states, means for setting said bistable device into one of its stable states prior to the initiation of said interval, first gate means for interconnecting said transducer and said first counter means, second gate means for interconnecting said source of reference pulses and said second counter means, means connecting an input of said first gate means and an input of said second gate means to an output of said bistable device for disabling said first and second gate means while said bistable device is in its said one state, and means connecting an input of said bistable device with said source of reference pulses and with said switch means for setting said bistable device into its other stable state in response to the first pulse from said source of reference pulses after the actuation of said switch means.

Apparatus for measuring, indicating and selectively providing a visual display of the location of a movable tool on a processing machine relative to a known datum or the rate of relative movement comprising transducer means for generating a pulse for each increment of relative movement between the movable tool and the processing machine, first counter means for counting the pulses from said transducer, a source of reference pulses, second counter means connected to said source controlled by said reference pulses, pulse means to initiate said first counter means and disable said second counter means, indicator means controlled by said first and second counter means and said pulse means for indicating the relative location of said movable tool and said processing machine when said second counter means is disabled and to indicate the rate of tool movement when said second counter means is enabled, said transducer means generating two signals in two separate channels for each increment of movement of said movable tool, the two signals in said two channels being in a timed relationship whereby movement of said tool in a first direction produces a first relationship between said two signals and movement of said tool in the opposite direction produces a second relationship between said two signals distinguishable from said first relationship, whereby said indicator means responds in opposite senses to said first and said second relationships to indicate the position resulting from bi-directional movement when said second counter means is disabled and the rate of movement of said tool when said second counter means is enabled.