Abstract:
A combination of a movable structure (adapted to ride on or over a surface while supporting or carrying at least one person) and a velocity-measuring device which includes means responsive to air flow develop an electrical signal representative of current velocity of the movable structure. A voice synthesizing means, responsive to the electrical signal representation of current velocity, provides periodic voice synthesized audible outputs indicative of current velocity of the movable structure. The movable structure may be a snow ski, a water ski or a skateboard, as well as a number of other sport participating implements, such as a bicycle, an ice boat and the like.
Abstract:
A magnetoresistive detection head for detecting relative displacement of a magnetic recording medium relative to the detection head includes two sets of magnetoresistive elements which change their respective resistances in response to changes in the intensity of a magnetic field generated by the magnetic recording medium during the relative displacement. The magnetoresistive elements are overlapped and spaced relative to each other by a specified space lag in the direction of the relative displacement. One set of magnetoresistive elements produce a sine output and the other a cosine output. The overlapping and precise spacing of the elements aligns the phases of the signal envelopes of the sine and cosine outputs, reducing reading errors when physical warps appear on the magnetic recording medium.
Abstract:
In electronic discrimination circuitry each of a plurality of at least three analog input signals is converted to respective digital pulse output signals and to a number of multi-phase clocking signals equal in number to the plurality of input signals are also generated such that each of the plurality of at least three analog input signals is synchronized in response to a respective one of the multi-phase clocking signals, whereby at least the leading edge of each of the digital output signals is positioned into a time slot corresponding to the multi-phase clocking signals. Selected pairs of the synchronized digital output signals are sequentially compared to determine within each compared pair that digital output signal having a higher frequency and comparing that digital output signal with another digital output signal until the digital output signal having the highest frequency is selected.
Abstract:
A digital speedometer for indicating angular or linear velocity has an index counter to control update of the displayed velocity. The purpose of the index counter is to prevent undesirable fluctuation of the displayed velocity where minor variations in velocity being measured have occurred. The digital speedometer uses a pulsating input signal having a frequency proportional to the velocity to be indicated. An oscillator circuit provides a clock frequency that is utilized in generating a counting period electrical signal. During the counting period, the input pulses proportional to velocity are gated into a counter. After each counting period, a comparison is made between the count currently being displayed and the count stored in the counter. If a difference occurs, the index counter is incremented. Only after the index counter has been incremented a plurality of consecutive times is the display permitted to be updated.
Abstract:
An apparatus for locally magnetizing moving magnetic material which comprises a coil for locally magnetizing the traveling magnetic material and a coil for detecting the magnetic flux of a locally magnetized spot, both coils being linearly arranged aside the magnetic material in its traveling direction; a pulse current generator for supplying the magnetizing coil with pulse current; an extraction device for extracting a signal denoting the speed of the traveling magnetic material out of a detection signal delivered from the magnetized spot-detecting coil; and a control device for controlling by the extracted signal the time width of output pulse current from the pulse current generator so as to cause the locally magnetized spot to have a fixed length extending along the magnetic material regardless of its traveling speed.
Abstract:
A rotary head-type video tape magnetic recording and reproducing system in which, at the time of recording, pulse signals are not only recorded on a running magnetic tape but are regenerated and a tape driving system is controlled in such a manner that the regenerated signals maintain a fixed phase relation with a reference signal; and in which, at the time of reproduction, said pulse signals are regenerated and the tape driving system is so controlled that the regenerated signals and a reference signal maintain a fixed relation between each other, thus facilitating the compiling and recording operation of the magnetic tape.