Steven Wallace

US Patent:

45945012, Jun 10, 1986

Filed:

Oct 9, 1980

Appl. No.:

6/195557

Inventors:

Paul R. Culley - Houston TX
Steven J. Wallace - Houston TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H05B 102

US Classification:

219492

Abstract:

An electronic thermal printer has a thermal printhead to which is applied a train of pulses which is pulse width modulated. A power switch connects and disconnects the printhead from a DC power source. The pulse train is integrated, scaled and applied as an input to a comparator circuit. The thermal printhead has a temperature sensing diode whose output is applied, as a reference voltage, to the other input of the comparator. During a print cycle, the output of the temperature sensing diode is cut off and the reference voltage is capacitively stored and held as the reference voltage. The output of the comparator circuit clears a latch circuit whose input is provided by a system clock and whose output is connected to control the power switch. The comparator provides an output when the integrated voltage reaches the reference voltage, clearing the latch. Since the latch is supplied with signals from the system clock, a constant frequency is maintained.

US Patent:

44207174, Dec 13, 1983

Filed:

Oct 6, 1980

Appl. No.:

6/193988

Inventors:

Steven J. Wallace - Houston TX
Paul L. Culley - Houston TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H02K 2904

US Classification:

318696

Abstract:

A stepper motor for use in peripheral devices such as electronic printing terminals has its coils selected for activation by selection circuitry, with its power provided by a switch mode current regulator. The switch mode regulator utilizes the selected motor winding as the storage element of the regulator and the voltage ramp derived from the current flow through the motor coil itself for comparison with a reference voltage. The output of the comparator circuit controls the state of a latch which has a fixed frequency clock input. The frequency of the latch output is fixed, but the on time and off time of the latch varies in accordance with the output of the comparator. A comparator and latch circuit therefore form a pulse width modulator which then regulates the on and off time of the switching regulator power transistor.

US Patent:

20220299376, Sep 22, 2022

Filed:

Mar 16, 2021

Appl. No.:

17/202605

Inventors:

- Wilson NC, US
Steven Wallace - Raleigh NC, US
Albert Chad Rouse - Prior Lake MN, US

International Classification:

G01K 1/12
A62C 37/36

Abstract:

Aircraft fire and overheat detection systems are described. The systems include a support bracket configured to secure the system to a component of an aircraft. A terminal assembly is fixedly connected to the support bracket and includes a connection assembly and a connection cable. A sensing element is electrically connected to the terminal assembly and arranged to detect at least one of fire and heat associated with the component of the aircraft. A protective sleeve is arranged about the connection assembly and connection cable. The sleeve has a lug portion at a first end with a sealing protrusion extending radially inward, a first wire portion, and a second wire portion, with progressively smaller diameters for each portion.

US Patent:

20210381901, Dec 9, 2021

Filed:

Jun 5, 2020

Appl. No.:

16/894189

Inventors:

- Wilson NC, US
Steven Wallace - Raleigh NC, US
Lawrence A. Coreth - Roanoke Rapids NC, US
Eric Boros - Raleigh NC, US
Carl Pardo - Rocky Mount NC, US
John Galeazzi - Wilson NC, US

International Classification:

G01K 1/14
G01M 3/00
G01K 13/00
B64D 45/00

Abstract:

A sensing assembly comprising includes one or more sensing elements formed as a tube. The sensing assembly also includes one or more clamps to secure the one or more sensing elements. Each of the one or more clamps includes a recess in which each of the one or more sensing elements is seated.

US Patent:

20200064202, Feb 27, 2020

Filed:

Aug 23, 2018

Appl. No.:

16/110215

Inventors:

- Wilson NC, US
Venkata Satish Babu Lakshmi - Bangalore, IN
Vinod Maruti Naik - Bangalore, IN
Thambiraj Avudaiappan - Bangalore, IN
Steven Wallace - Raleigh NC, US
Kalyana Chakravarthy - Bangalore, IN
Rhushikesh Patil - Bangalore, IN

International Classification:

G01K 1/14
F16B 2/06
F16M 13/02

Abstract:

A clamp fixture includes a hub extending between a first end and a second end. A first leg extends in a first direction from the first end of the hub, and a second leg extends in the first direction from the second end of the hub. At least a portion of the first leg curves away from the second leg, and at least a portion of the second leg curves away from the first leg. The clamp fixture also includes a loop with a first half and a second half. The first half includes a first jaw extending from the hub. The second half includes a flange and a second jaw extending from the flange. A fastener connects the flange to the hub such that the first jaw and the second jaw join to close the loop.

US Patent:

20170003185, Jan 5, 2017

Filed:

Jun 30, 2015

Appl. No.:

14/755321

Inventors:

- Wilson NC, US
Steven Wallace - Raleigh NC, US

International Classification:

G01L 9/00
G01L 7/06

Abstract:

A detector that detects an alarm and/or fault condition with respect to a pressure of a medium is provided. The detector comprises a housing comprising an access tube configured to receive a medium and a bellows fixed to the housing comprising a cavity and a first contact surface. The detector also comprises an adjustment screw positioned within the cavity of the bellows, coupled to the housing via an insulation member, and comprising a second contact surface. The detector is further configured to detect a change in pressure of the medium based on whether the first contact surface and the first contact surface are in electrical communication.

US Patent:

20160110979, Apr 21, 2016

Filed:

Oct 16, 2014

Appl. No.:

14/515886

Inventors:

- Wilson NC, US
Steven Wallace - Raleigh NC, US
William Brett Standifer - Wilson NC, US

International Classification:

G08B 17/04
G08B 17/06

Abstract:

In one aspect, a pneumatic detector assembly is provided. The assembly includes a housing, a sensor tube, a contact pin, and at least one switch having a bellows operatively associated with the sensor tube and the contact pin. The bellows is configured to move into and out of contact with the contact pin based on a pressure in the sensor tube.

US Patent:

20150348386, Dec 3, 2015

Filed:

May 27, 2014

Appl. No.:

14/287969

Inventors:

- Wilson NC, US
Harlan Hagge - Knightdale NC, US
Steven Wallace - Raleigh NC, US
Dharmendr Len Seebaluck - Wake Forest NC, US

Assignee:

Kidde Technologies, Inc. - Wilson NC

International Classification:

G08B 17/04
G01L 7/00
H01H 47/00

Abstract:

A pneumatic detection system and a method of forming the pneumatic detection system are described. The system includes a sealed tube, a refrigerant disposed within the sealed tube, and a switch configured to be activated based on a specified pressure being reached within the sealed tube.