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:
Sep. 21, 1976
Filed:
Dec. 26, 1973
Thomas K Naylor, Belmont, MA (US);
American Optical Corporation, Southbridge, MA (US);
Abstract
There is disclosed a technique for compensating timing errors in low-speed tape systems, such as a system in which ECG signals are recorded on a tape moving as slow as 0.08 inches per second. Clock pulses are recorded on the tape together with the signal of interest. After the signal is derived during reading of the tape, the recorded clock pulses control the sampling of the signal. The samples are used to re-constitute the signal under the control of another set of clock pulses. This latter set of clock pulses is derived from the recorded set by a phase-locked loop which establishes equal time spacings between the re-constituting clock pulses even though the sampling clock pulses, which are read from the tape and applied to the input of the phase-locked loop, may have unequal time spacings.