The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 1977
Filed:
Apr. 04, 1975
John R Lowdenslager, Stamford, CT (US);
Timex Corporation, Waterbury, CT (US);
Abstract
A watch/chronometer/wrist calculator/measurement device contains a crystal or analog precision source of pulse trains which is used to update a clock register serving as an information source and a multipurpose arithmetic accumulator. A manual keyboard provides means for entering decimal numbers into a third or input register to serve as an additional information source. Data entry means are provided for incrementing or decrementing the multipurpose accumulator by the number of units contained in the input register. An additional information source for the accumulator is the chronograph control. Entry means are provided to increment the number contained in the accumulator at a rate controlled by the chronograph control and by the precision source of pulse trains. A display select control provides means to manually switch the display mode between the clock register and the calculator/chronometer function. Additional automatic means is provided to switch the display function between the input register and the accumulator when in the calculator/chronometer mode. The display device thus provides means for showing; optically, the decimal value of the digits in the clock register, or optionally, the number entered in the multipurpose accumulator. An update control provides means to reset, manually, the number contained in the clock register. An alternate configuration of the device provides an electrical connection on the case to which an external voltage can be connected, means to make a measurement of such external voltage, and serves as an additional information source to enter the measurement into the multipurpose accumulator so as to display, digitally, the value of such measurement on the face of the device. Means is also provided to make a frequency or period measurement of the said external voltage provided said external voltage is periodic in nature.