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:
Jul. 10, 2012
Filed:
Jun. 27, 2008
George Andrew Davidson Briggs, Oxford, GB;
Arzhang Ardavan, Oxford, GB;
George Andrew Davidson Briggs, Oxford, GB;
Arzhang Ardavan, Oxford, GB;
Isis Innovation Limited, , GB;
Abstract
An atomic clock comprises endohedral fullerene systems which provide the standard frequency oscillations. A magnet device applies a magnetic field to the endohedral fullerenes. The applied magnetic field is adjustable. An excitation device both excites each endohedral fullerene system to cause it to undergo transitions which generate the time-keeping oscillations, and also probes the systems such that the oscillations can be measured and the device controlled. A detection device senses the response of the systems induced by the excitation device. The output of the detection device is fed to a controller. The controller produces the atomic clock output, which is the clock signal or frequency standard, and also controls the magnet device and the excitation device. The controller controls the magnetic field applied by the magnet device such that the energy difference of the time-keeping transition is insensitive to variations in magnetic field, thereby stabilizing the frequency of the oscillations and avoiding the effects of changes in external magnetic field.