Patents by Inventor David Doss
David Doss 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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Publication number: 20080078470Abstract: A sensing mechanism (12) for detecting user contact with an active portion (26) of the power tool (10) is provided. In addition, a safety mechanism (14) for preventing prolonged user contact with the active portion (26) of a power tool (10) is provided. The safety mechanism (14) is configured to actuate upon receipt of a signal from the sensing mechanism (12). According to a first aspect, the safety mechanism (14) is arranged to rapidly displace the active portion (26) away from a user extremity. Alternatively, according to a second aspect, the safety mechanism (14) is arranged to rapidly urge an extremity of the user away from the active portion (26) of the power tool (10).Type: ApplicationFiled: September 14, 2007Publication date: April 3, 2008Inventors: Michael O'Branion, David Carrier, Adan Ayala, Michael Baron, James Bascom, Frederick Bean, Mark Brunson, Warren Ceroll, Peter Chaikowsky, David Doss, Robert Gehret, John Horky, Daryl Meredith, Philip Miller, William Stumpf, Matthew Webster, Qiang Zhang
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Publication number: 20060090816Abstract: A power planer having a base, a carriage assembly and a height scale. The carriage assembly includes a cutterhead that may be adjustably positioned relative to a datum that is defined by the base. The height scale has a rotary scale that rotates in response to movement of the carriage assembly relative to the base. A value of a displayed portion of the rotary scale is related to a distance between the cutterhead and the base.Type: ApplicationFiled: December 14, 2005Publication date: May 4, 2006Inventors: Barry Wixey, Robert Welsh, David Wikle, David Doss
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Publication number: 20050076972Abstract: A power tool having a base assembly with a first portion, which defines an upper surface, and a second portion that defines a lower surface. The first and second portions may be castings and are coupled to one another without machining the upper surface of the first portion or the lower surface of the second portion. After assembly of the base portion, the upper surface of the second portion is machined to define a flat reference surface. Construction of the power tool in this manner provides a robust base assembly that is relatively inexpensive to manufacture. A related method is also provided.Type: ApplicationFiled: December 1, 2004Publication date: April 14, 2005Inventors: Barry Wixey, Robert Welsh, David Wikle, David Doss
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Patent number: 6181075Abstract: A power supply for high voltage, low current gas discharge tubes such as neon, argon, and mercury vapor. A free running, flyback oscillator, converts D.C. voltage energy into radio frequency energy by means of a compact, ferrite transformer and associated circuitry. The primary winding is tuned by a resonant capacitor and driven by a power transistor. A high voltage, centertapped winding of a ferrite transformer drives the gas tube load directly. A feedback winding arranged across the transistor base and emitter junction sustains oscillation and controls the drive level of the transistor by means of a regulating circuit which controls the amplitude of the current. Oscillator starting is achieved by means of an on-off switch which supplies a single starting pulse to the power transistor or by means of a time delayed starting pulse.Type: GrantFiled: October 16, 1989Date of Patent: January 30, 2001Assignee: Everbrite Electronics, Inc.Inventor: David Doss
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Patent number: 5367225Abstract: A high frequency power supply for neon and mercury luminous tubes including means for simultaneously suppressing bubbles formed in neon tubes and for minimizing migration of mercury commonly associated with the use of solid-state luminous tube power supplies.Type: GrantFiled: February 9, 1993Date of Patent: November 22, 1994Assignee: Everbrite, Inc.Inventors: David Pacholok, David Doss, deceased
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Patent number: 5352956Abstract: A power supply for high voltage, low current gas discharge tubes such as neon, argon, and mercury vapor. A free running, flyback oscillator, converts D.C. voltage energy into radio frequency energy by means of a compact, ferrite transformer and associated circuitry. The primary winding is tuned by a resonant capacitor and driven by a power transistor. A high voltage, centertapped winding of a ferrite transformer drives the gas tube load directly. A feedback winding arranged across the transistor base and emitter junction sustains oscillation and controls the drive level of the transistor by means of a regulating circuit which controls the amplitude of the current. Oscillator starting is achieved by means of an on-off switch which supplies a single starting pulse to the power transistor or by means of a time delayed starting pulse.Type: GrantFiled: October 16, 1989Date of Patent: October 4, 1994Assignee: Everbrite Electronics, Inc.Inventor: David Doss
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Patent number: 5087860Abstract: A power supply for high voltage, low current gas discharge tubes such as neon, argon, and mercury vapor. A free running, flyback oscillator, converts D.C. voltage energy into radio frequency energy by means of a compact, ferrite transformer and associated circuitry. The primary winding is tuned by a resonant capacitor and driven by a power transistor. A high voltage, centertapped winding of a ferrite transformer drives the gas tube load directly. A feedback winding arranged across the transistor base and emitter junction sustains oscillation and controls the drive level of the transistor by means of a regulating circuit which controls the amplitude of the current. Oscillator starting is achieved by means of an on-off switch which supplies a single starting pulse to the power transitor or by means of a time delayed starting pulse.Type: GrantFiled: October 16, 1989Date of Patent: February 11, 1992Assignee: Everbrite, Inc.Inventor: David Doss
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Patent number: 5075598Abstract: A power supply for high voltage, low current gas discharge tubes such as neon, argon, and mercury vapor. A free running, flyback oscillator, converts D.C. voltage energy into radio frequency energy by means of a compact, ferrite transformer and associated circuitry. The primary winding is tuned by a resonant capacitor and driven by a power transistor. A high voltage, centertapped winding of a ferrite transformer drives the gas tube load directly. A feedback winding arranged across the transistor base and emitter junction sustains oscillation and controls the drive level of the transistor by means of a regulating circuit which controls the amplitude of the current. Oscillator starting is achieved by means of an on-off switch which supplies a single starting pulse to the power transistor or by means of a time delayed starting pulse.Type: GrantFiled: October 16, 1989Date of Patent: December 24, 1991Assignee: Everbrite, Inc.Inventor: David Doss
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Patent number: 5057748Abstract: A power supply for high voltage, low current gas discharge tubes such as neon, argon, and mercury vapor. Free running, flyback oscillator, converts D.C. voltage energy into radio frequency energy by means of a compact, ferrite transformer and associated circuitry. The primary winding is tuned by a resonant capacitor and driven by a power transistor. A high voltage, centertapped winding of a ferrite transformer drives the gas tube load directly. A feedback winding arranged across the transistor base and emitter junction sustains oscillation and controls the drive level of the transistor by means of a regulating circuit which controls the amplitude of the current. Oscillator starting is achieved by means of an on-off switch which supplies a single starting pulse to the power transistor or by means of a time delayed starting pulse.Type: GrantFiled: October 16, 1989Date of Patent: October 15, 1991Assignee: Everbrite, Inc.Inventor: David Doss