04775948 is referenced by 93 patents and cites 2 patents.

A baseball with a self-contained speed-measuring module positioned within a hollowed-out portion of the solid core of the ball, with the upper portion of the module being a display unit that indicates the speed at which the baseball was thrown over a fixed distance, the read-out of the display unit being visible from the outside to allow for the reading thereof. The module is enclosed in a single, unitary housing, and includes a computer chip. The chip includes speed-determining circuitry, and is made up of a programmable counter that counts down a plurality of times for every time interval of the flight of the thrown ball, the value representative of each time interval being loaded into the programmable counter by a programmable logic array, whose inputs are coupled to the outputs of a most-significant digit display counter of an LCD unit, the instantaneous value of which is representative of the time interval determined by the countdown rate of the programmable counter. Each time interval represents a portion of a graph of speed vs. time, with ten points in each time interval being approximated by a first-order linear approximation, with each of the ten points representing one countdown of the programmable counter. A piezoelectric stop switch is provided for stopping the counter and latching the data to indicate the speed of the thrown ball.

Title
Baseball having inherent speed-measuring capabilities
Application Number
7/1787
Publication Number
4775948
Application Date
January 8, 1987
Publication Date
October 4, 1988
Inventor
Teng C Lu
Taipei
TW
Ding Li Huang
Taipei Hsien
TW
Michael Yang
Chang Hwa
TW
Hong T Lin Jr
Taipei
TW
Dwain Dial
Elk Grove Village
IL, US
Agent
Marvin N Benn
Milton S Gerstein
Assignee
Monogram Models
IL, US
IPC
A63B 69/36
G06F 15/20
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