Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7839223 | Method and apparatus for advanced frequency tuning A method and apparatus for tuning the operational frequency of an electrical generator coupled to a time-varying load is described. One illustrative embodiment rapidly calculates an error (reflection coefficient magnitude) at the current operational frequency of the... | 11/23/2010 |
| 7370531 | Detection circuits, detection method and systems of measuring physical quantities A detection circuit 30 has a unit 30a for inputting a signal to be detected by synchronized wave detection, a unit 30b for inputting a standard signal for the signal to be detected and a unit 30c for inputting an offs... | 05/13/2008 |
| 7357025 | Micromachined apparatus with co-linear drive arrays A mass includes a first set of drive fingers interdigitated with a first array of fixed drive fingers and a second set of drive fingers interdigitated with a second array of fixed drive fingers. Each array of fixed drive fingers is affixed to a substrate using a plu... | 04/15/2008 |
| 7347094 | Coupling apparatus for inertial sensors A coupling apparatus allows anti-phase movements of inertial sensor element frames along parallel axes but substantially prevents in-phase movements of the frames. The coupling apparatus includes a bar coupled between first and second sensor element frames and at le... | 03/25/2008 |
| 7287428 | Inertial sensor with a linear array of sensor elements An inertial sensor includes at least one pair of sensor elements arranged in a linear array. Each sensor element has a frame and a movable mass suspended within the frame. The frames of each pair of sensor elements may be coupled so that the frames are allowed to mo... | 10/30/2007 |
| 7216539 | Micromachined apparatus with split vibratory masses Each of a number of resonator masses is split into two separate lobes or masses joined together by a short flexure. The short flexure allows the separate lobes or masses to rotate slightly as they resonate so as to substantially relieve longitudinal stresses in cert... | 05/15/2007 |
| 7204144 | Micromachined apparatus with drive/sensing fingers in coupling levers Resonator structures include a plurality of resonator masses interconnected by a plurality of levers so as to resonate in anti-phase with one another. The levers include a plurality of lever fingers interdigitated with corresponding fixed fingers affixed to an under... | 04/17/2007 |
| 7089792 | Micromachined apparatus utilizing box suspensions A micromachined gyroscope makes use of Coriolis acceleration to detect and measure rotation rate about a plane normal to the surface of a substrate. Specifically, various resonating structures are suspended within a frame. The resonating structures include phase and... | 08/15/2006 |
| 7032451 | Micromachined sensor with quadrature suppression Quadrature suppression is provided by placing a resonator mass adjacent to a quadrature suppression electrode. The resonator mass is capable of moving substantially parallel to the quadrature suppression electrode and includes a notch formed adjacent to a portion of... | 04/25/2006 |
| 6958566 | Mechanical resonator device having phenomena-dependent electrical stiffness A mechanical resonator device which has a phenomena-dependent electrical stiffness is provided. The phenomena may be temperature or acceleration, for example. The device includes a substrate and a resonator supported above the substrate by supports. The device furth... | 10/25/2005 |
| 6064169 | Motor amplitude control circuit in conductor-on-insulator tuning fork gyroscope A control system for a tuning fork gyroscope uses motor frequency to control motor amplitude. The tuning fork gyroscope has a drive signal input and an output signal from which motor frequency is determined. A phase/frequency detector generates an error s... | 05/16/2000 |
| 5966053 | Apparatus and method for controlling a mechanical oscillator An improvement to a phase controlled mechanical oscillator consists of a balancing network which generates a feedback signal from two different input signals with adjustable weights. One of these input signals is directly derived from the oscillator signa... | 10/12/1999 |
| 5783973 | Temperature insensitive silicon oscillator and precision voltage reference formed therefrom Micromachined, thermally insensitive silicon resonators are provided having accuracy equivalent or superior to that of quartz resonators, and are fabricated from a micromechanical, silicon-on-glass process. In one embodiment, such a resonator is realized ... | 07/21/1998 |
| 5374905 | Phase locked loop motor control circuit for tuning cavity resonator An arrangement in tuning resonance modules includes a cavity and resonance body, which is steered to resonance position by a motor, which is driven by a voltage as long as there is a phase difference between the input signal to the resonance module and th... | 12/20/1994 |
| 4700146 | Automatic tuning of cavity klystron using sampled RF output A processor-controlled drive motor system for tuning a cavity klystron monitors the output (amplitude-vs-frequency) of the klystron and compares that monitored performance output with an intended amplitude-vs-frequency profile. Differences between the two... | 10/13/1987 |
