Karraker
Daniel Karraker, Cupertino, CA US
Patent application number | Description | Published |
---|---|---|
20120011690 | REMOVABLE FIXTURE FOR MANUFACTURING DEVICE - A CNC system can include a cylinder adapted to rotate about, travel along, and deliver a force in an axial direction, an extension coupled to a distal end of and extending outward from the elongated component in a direction perpendicular to the axial direction, and a removable fixture adapted to receive the axial force and to be moved and positioned thereby along a plane (i.e., two directions) substantially perpendicular to the axial direction. The fixture has a central opening along the first direction adapted to receive the elongated component, and includes external features adapted to guide manufacturing operations for other manufacturing components. Chamfers on both the extension and removable fixture convert the downward axial force into a plurality of lateral forces that move the fixture against a receiver base. Datums located at guide holes in the fixture stop such lateral movement when the movement causes them to contact guide pins coupled to the receiver base. | 01-19-2012 |
20140078658 | DETECTION OF OLEOPHOBIC COATING - Apparatus, systems and methods for processing covers for electronic devices are disclosed. In one embodiment, oleophobic coatings can be deposited on the covers. Oleophobicity of the coatings can be monitored. In one embodiment, glass members can pertain to cover glass for housings of the electronic devices. | 03-20-2014 |
Daniel O. Karraker, Cupertino, CA US
Patent application number | Description | Published |
---|---|---|
20140055600 | IN-LINE PARTICLE DISCRIMINATION FOR COSMETIC INSPECTION - A method for in-line cosmetic inspection of at least a portion of a surface of a product includes identifying if at least one blemish exists on the portion of the surface, disturbing the portion of the surface based on the identifying, and determining if the at least one blemish is immobile based on the disturbing. | 02-27-2014 |
Daniel Owen Karraker, Dongola, IL US
Patent application number | Description | Published |
---|---|---|
20090320196 | CONNECTION DEVICE BETWEEN TOILET AND DRAINPIPE - This is a type of connection device between toilet and drainpipe, including trap with inlet connected to toilet flush port and outlet connected to drainpipe. The trap has bend part and horizontal lower pipe connected to it. Upper and lower inner pipe walls of the horizontal lower pipe have different declination angles. There is containing part in the inlet; and in the containing part there is sealing part forming sealing structure between the flush port and inlet. This simplifies the complex structure of existing toilet drainage part for on-site installation, for reliable use. Separated trap design features the structure that can generate siphon phenomenon. At the time of sales, wash-down drainage can be easily transformed to siphon wash-down drainage just by changing such parts as the trap of the toilet, thus improving the drainage effect. | 12-31-2009 |
Douglas Karraker, Muskego, WI US
Patent application number | Description | Published |
---|---|---|
20090167229 | AC Motor Bypass With Fault Annunication, Serial Communication And Fault Tolerant Coil Control - A motor bypass is controlled by a digital signal processor (DSP) with embedded control software that allows fault detection and annunciation, serial communications between both a variable frequency drive (VFD) and a bypass controller and the bypass controller and a host computer. The use of the DSP and embedded control software further allows for contactor coil control to provide fault tolerant operation as well as fault condition detection and annunciation to the user. | 07-02-2009 |
Douglas Karraker, New Berlin, WI US
Patent application number | Description | Published |
---|---|---|
20150253359 | DC BUS VOLTAGE MEASUREMENT CIRCUIT - A voltage measuring device includes an input configured to be coupled to a secondary of an inductive coupling of a DC to DC voltage converter. A switch coupled to the input forms a discharge path parallel to a sampling capacitor dependent on the voltage at the input equaling or exceeding a first voltage threshold and independent of an output voltage at the output of the device. The sampling capacitor is coupled to the output. A rectifier in series with the sampling capacitor is biased to conduct upon the input voltage, minus the output voltage, equaling or exceeding a second voltage. | 09-10-2015 |
Douglas W. Karraker, Muskego, WI US
Patent application number | Description | Published |
---|---|---|
20110298470 | DETECTION OF WELDED SWITCH CONTACTS IN A LINE CONVERTER SYSTEM - A system for the detection of welded contacts in a circuit of a line converter system has a plurality of inverter switches, a plurality of utility switches in which a pair of utility switches is connected in series through a line to a utility, a voltage detector, an electronic controller, and a DC input source. The line converter system converts incoming DC power into AC output power that is delivered to the utility grid. The voltage detector measures the voltage across a first node and a second node of the circuit and provides an output that is interpreted by an electronic controller for each step performed during a method of detection of welded contacts. The detection method has a sequence of test steps in which at least one switch is opened and/or closed, a DC bus of the inverter or the utility grid is used as a stimulus voltage, and the voltage is measured. If a voltage is not detected across the first and second nodes, the test sequence is continued until a welded contact is detected or the electronic controller determines that none of the contacts are welded. If the controller determines that none of the contacts are welded, the line converter system is permitted to connect and supply AC power to the utility. | 12-08-2011 |
20110299312 | INVERTER FOR SOLAR CELL ARRAY - A full-bridge, NPC inverter uses pulse width modulation (PWM) to convert the DC voltage from a solar panel array to an AC voltage at the output of the inverter that is acceptable for connection to a utility. The PWM control unit has a predetermined carrier frequency. The carrier unit uses for each carrier period either positive or negative values of a reference voltage to generate a predetermined number of signals to control the switching on and off of each of the eight inverter switching elements in a predetermined pattern for a predetermined period of the carrier frequency period to thereby produce the acceptable alternating current voltage at the inverter output and not produce between the inverter input and earth ground a carrier frequency component. | 12-08-2011 |