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Patent

Frequency control system utilizing magnetostrictive elements

20 Oct 1961-
About: The article was published on 1961-10-20. It has received 2 citations till now. The article focuses on the topics: Automatic frequency control.
Citations
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Patent
03 May 2012
TL;DR: In this paper, a method and device for harvesting energy from a fluid flow by converting the kinetic energy of the flow into vibrational energy, which then may be converted to electrical energy by a magnetostrictive-based vibrational harvester.
Abstract: Embodiments described herein relate to a method and device for harvesting energy from a fluid flow by converting the kinetic energy of the flow into vibrational energy, which then may be converted to electrical energy by a magnetostrictive-based vibrational energy harvester. Some embodiments of this device rely on the principle of vortex-induced vibrations, where the frequency of the induced vibration is of the same order as the frequency of vortex shedding (the Strouhal number). Some embodiments of this device rely on the principle of turbulence-induced vibration, where the frequency of vibration can be significantly higher than the vortex shedding frequency, and is related to the turbulence frequency of the flow. Some embodiments also relate to converting energy from pressure pulses or differentials in the fluid. These embodiments in no way limit the vibration induction mechanism, and other principles of flow-induced vibration may be used in conjunction with the magnetostrictive-based vibrational energy harvester.

14 citations

References
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Patent
18 Jun 1942
TL;DR: In this paper, high frequency tube structures having enclosed oscillatory circuits of the general type disclosed in copending application Serial No. 168,355, filed October 11, 1937, by Russell H. Vaiian.
Abstract: This invention relates, generally, to high frequency tube structures having enclosed oscillatory circuits of the general type disclosed in copending application Serial No. 168,355, filed October 11, 1937, by Russell H. Vaiian, one of the inventors herein, now Patent No. 2,242,275, issued January...

149 citations

Patent
Winfield R Koch1
31 Jan 1940
TL;DR: In this paper, a means for frequency modulating an ultra high frequency resonant line circuit was proposed, which is a division of my copending application, Serial No. 156,054, filed July 28, 1937.
Abstract: My invention relates to ultra high frequency modulators, and particularly to means for frequency modulating an ultra high frequency resonant line circuit. This application is a division of my copending application, Serial No. 156,054, filed July 28, 1937, Patent No. 2,174,701, Oct. 3, 1939,...

19 citations