Patents by Inventor David W. Howard
David W. Howard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9539585Abstract: A dynamic baffle system for a magnetic separator includes a containment barrier secured to a frame and positioned between a rotary screen drum and a magnetic drum. The dynamic baffle system further includes a baffle configured to block an opening of the containment barrier. The baffle is movable between an open position in which media mixture is capable of flowing from the containment barrier to the magnetic drum and a closed position in which the media mixture is prohibited from flowing from the containment barrier to the magnetic drum and configured to evenly build up on the containment barrier. The dynamic baffle system further includes a sensor and a controller coupled to the sensor and the baffle to control the amount of media mixture flowing from the rotary screen drum to the magnetic drum.Type: GrantFiled: June 14, 2016Date of Patent: January 10, 2017Assignee: WHEELABRATOR GROUP, INC.Inventors: Michael Dwayne Reaves, David W. Howard
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Publication number: 20160288293Abstract: A dynamic baffle system for a magnetic separator includes a containment barrier secured to a frame and positioned between a rotary screen drum and a magnetic drum. The dynamic baffle system further includes a baffle configured to block an opening of the containment barrier. The baffle is movable between an open position in which media mixture is capable of flowing from the containment barrier to the magnetic drum and a closed position in which the media mixture is prohibited from flowing from the containment barrier to the magnetic drum and configured to evenly build up on the containment barrier. The dynamic baffle system further includes a sensor and a controller coupled to the sensor and the baffle to control the amount of media mixture flowing from the rotary screen drum to the magnetic drum.Type: ApplicationFiled: June 14, 2016Publication date: October 6, 2016Inventors: Michael Dwayne Reaves, David W. Howard
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Patent number: 9370781Abstract: A dynamic baffle system for a magnetic separator includes a containment barrier secured to a frame and positioned between a rotary screen drum and a magnetic drum. The dynamic baffle system further includes a baffle configured to block an opening of the containment barrier. The baffle is movable between an open position in which media mixture is capable of flowing from the containment barrier to the magnetic drum and a closed position in which the media mixture is prohibited from flowing from the containment barrier to the magnetic drum and configured to evenly build up on the containment barrier. The dynamic baffle system further includes a sensor and a controller coupled to the sensor and the baffle to control the amount of media mixture flowing from the rotary screen drum to the magnetic drum.Type: GrantFiled: January 26, 2016Date of Patent: June 21, 2016Assignee: WHEELABRATOR GROUP, INC.Inventors: Michael D. Reaves, David W. Howard
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Publication number: 20160136656Abstract: A dynamic baffle system for a magnetic separator includes a containment barrier secured to a frame and positioned between a rotary screen drum and a magnetic drum. The dynamic baffle system further includes a baffle configured to block an opening of the containment barrier. The baffle is movable between an open position in which media mixture is capable of flowing from the containment barrier to the magnetic drum and a closed position in which the media mixture is prohibited from flowing from the containment barrier to the magnetic drum and configured to evenly build up on the containment barrier. The dynamic baffle system further includes a sensor and a controller coupled to the sensor and the baffle to control the amount of media mixture flowing from the rotary screen drum to the magnetic drum.Type: ApplicationFiled: January 26, 2016Publication date: May 19, 2016Applicant: WHEELABRATOR GROUP, INC.Inventors: Michael D. Reaves, David W. Howard
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Patent number: 9242251Abstract: A dynamic baffle system for a magnetic separator includes a containment barrier secured to a frame and positioned between a rotary screen drum and a magnetic drum. The dynamic baffle system further includes a baffle configured to block an opening of the containment barrier. The baffle is movable between an open position in which media mixture is capable of flowing from the containment barrier to the magnetic drum and a closed position in which the media mixture is prohibited from flowing from the containment barrier to the magnetic drum and configured to evenly build up on the containment barrier. The dynamic baffle system further includes a sensor and a controller coupled to the sensor and the baffle to control the amount of media mixture flowing from the rotary screen drum to the magnetic drum.Type: GrantFiled: January 30, 2013Date of Patent: January 26, 2016Assignee: WHEELABRATOR GROUP, INC.Inventors: Michael D. Reaves, David W. Howard
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Publication number: 20140209516Abstract: A dynamic baffle system for a magnetic separator includes a containment barrier secured to a frame and positioned between a rotary screen drum and a magnetic drum. The dynamic baffle system further includes a baffle configured to block an opening of the containment barrier. The baffle is movable between an open position in which media mixture is capable of flowing from the containment barrier to the magnetic drum and a closed position in which the media mixture is prohibited from flowing from the containment barrier to the magnetic drum and configured to evenly build up on the containment barrier. The dynamic baffle system further includes a sensor and a controller coupled to the sensor and the baffle to control the amount of media mixture flowing from the rotary screen drum to the magnetic drum.Type: ApplicationFiled: January 30, 2013Publication date: July 31, 2014Inventors: Michael D. Reaves, David W. Howard
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Patent number: 8648654Abstract: An integrated circuit has a first and second voltage supply rails with first and second voltage levels and a gated voltage supply rail. Each of the circuit elements is connected either between the first and second voltage supply rails or between the gated rail and the second voltage rail. A source circuit structure comprising one or more circuit elements provides an input signal maintained at a static value during a power gated mode of operation. At least one recipient circuit structure requires receipt of the input signal at the static value during the power gated mode of operation. A distribution network comprises a first subset of circuit elements which pull their output to the first voltage level then the input signal has the static value, and a second subset of circuit elements which pull their output to the second voltage level when the input signal has the static value.Type: GrantFiled: September 25, 2012Date of Patent: February 11, 2014Assignee: ARM LimitedInventors: James E Myers, John P Biggs, David W Flynn, David W Howard
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Patent number: 6904941Abstract: A variable diameter cylinder made from a sheet having first and second edges that are opposite to each other and that slideably connect with each other to form a helical joint of a cylinder such that sliding the edges of the sheet along the joint varies a diameter and length of the cylinder. When marked with a scale, the cylinder acts as a measuring device that is both highly accurate and easy to use. A helical-based scale can be used alone, or a linear scale can be used in combination with a Vernier scale.Type: GrantFiled: September 18, 2002Date of Patent: June 14, 2005Inventor: David W. Howard
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Publication number: 20040050248Abstract: A variable diameter cylinder made from a sheet having first and second edges that are opposite to each other and that slideably connect with each other to form a helical joint of a cylinder such that sliding the edges of the sheet along the joint varies a diameter and length of the cylinder. When marked with a scale, the cylinder acts as a measuring device that is both highly accurate and easy to use. A helical-based scale can be used alone, or a linear scale can be used in combination with a Vernier scale.Type: ApplicationFiled: September 18, 2002Publication date: March 18, 2004Inventor: David W. Howard
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Patent number: 5459691Abstract: A memory circuit, in which test data are compared with stored data, comprises a plurality of memory cells each having two complementary data outputs indicative of a respective stored bit of the stored data. The two complementary outputs are selectively interchanged, in response to a respective test bit of the test data. An output signal is then generated (e.g. by a sense amplifier) in response to the relative polarities of the two complementary data outputs. The output signal is indicative of whether the stored bit is equal to the test bit. Where a multi-bit word is stored in a plurality of the memory cells, the output signals generated by a comparison of each stored bit of the multi-bit word and respective bits of the test data are combined by, for example, an AND gate. The output of the AND gate indicates whether the test data matches the stored multi-bit word.Type: GrantFiled: September 8, 1994Date of Patent: October 17, 1995Assignee: Advanced RISC Machines LimitedInventor: David W. Howard
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Patent number: 5434823Abstract: An output signal driver is described in which a functional block 10, such as a random access memory, provides a data signal to one input of a multiplexer 26 and then via a buffer stage 24 to an output signal line 6. The other input of the multiplexer 26 receives a recirculated value from the output signal line 6. In operation, the buffer stage 24 is enabled as soon as the functional block 10 is enabled. A data valid signal dv indicating when the data signal from the functional block is ready for output is used to switch the multiplexer 26 from selecting the recirculated value to selecting the new data signal value. The output signal on the output signal line 6 is made to always have a defined state derived from the existing output signal level or, when it becomes available, the new data signal. Power wastage through the driving of spurious signals on the output signal line 6 is thus avoided.Type: GrantFiled: August 23, 1994Date of Patent: July 18, 1995Assignee: Advanced Risc Machines LimitedInventor: David W. Howard
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Patent number: 4010095Abstract: A method for hydrodynamic separation of enantiomorphic crystals such as mono-clinic or tri-clinic crystals as well as other bodies, at least one of which does not possess a center of hydrodynamic resistance, wherein said bodies are caused to move in one direction through a fluid in face contact with a supporting surface whereby lateral separation between crystals or bodies are effected in response to a resultant perpendicular force acting on said crystals or bodies.Type: GrantFiled: August 1, 1974Date of Patent: March 1, 1977Assignee: Wisconsin Alumni Research FoundationInventors: Joseph O. Hirschfelder, Edwin N. Lightfoot, David W. Howard