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Coolidge
Aaron Coolidge, Marlborough, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20080265864 | Phase Identification Systems and Methods - A system and method for determining the relative phase between current-carrying conductors. A reference unit samples and digitizes a voltage waveform at a reference location and transmits the digitized voltage waveform. A field sampling unit is placed on or directly adjacent a field conductor at a field location and transmits a signal representative of the voltage waveform of the field conductor. A field unit receives and digitizes the waveform received from the field sampling unit, receives the digitized voltage waveform from the reference unit, and compares the digitized field waveform and the digitized reference waveform. Also provided are methods for commissioning the phase identification system and calibrating the reference unit. | 10-30-2008 |
Aaron P. Coolidge, Northborough, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20090289616 | DEAD-LINE PHASE IDENTIFICATION SYSTEM AND METHOD THEREOF - A system and method for dead-line conductor phase identification is provided. The system includes a receiver unit having a set of current sensors, such as current transformers. The receiver unit current sensors are coupled to conductors having a known phase in a multiphase power line. The current sensors are positioned adjacent a transformer connected to a section of the power line having an open circuit condition. A transmitter unit transmits a current signal on to a conductor at the open circuit section of the power line. The current sensors detect the current signal and the receiver unit transmits a signal to the transmitter unit identifying the phase on which the current signal was transmitted. | 11-26-2009 |
Thomas R. Coolidge, Falls Village, CT US
Troy M. Coolidge, Victoria, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20100100224 | ADJUSTABLE HEAD MOUNT FOR DIGITAL MANUFACTURING SYSTEM - A head mount for use in a digital manufacturing system, where the head mount comprises a first component supported by at least one gantry of the digital manufacturing system, and a second component configured to retain a deposition head of the digital manufacturing system, and to move relative to the first component in response to a load applied to the deposition head from a platform assembly of the digital manufacturing system. | 04-22-2010 |