Robert L Schroeder

US Patent:

7279678, Oct 9, 2007

Filed:

Aug 15, 2005

Appl. No.:

11/203743

Inventors:

A. Ballard Andrews - Wilton CT, US
Jacques Jundt - Bethel CT, US
Robert J. Schroeder - Newtown CT, US
Bhavani Raghuraman - Wilton CT, US
Oliver C. Mullins - Ridgefield CT, US

Assignee:

Schlumber Technology Corporation - Ridgefield CT

International Classification:

G01V 8/00

US Classification:

2502691

Abstract:

Methods and apparatus for analyzing a hydrocarbon mixture are disclosed, comprising at least one light-emitting diode (LED) and at least one photodetector positioned to detect energy transmitted by the LED through a sample of the hydrocarbon mixture. In at least one embodiment an optical filter is coupled to the output of the LED to mitigate the adverse effects of the LED's sensitivity to temperature.

US Patent:

7558579, Jul 7, 2009

Filed:

Jun 20, 2005

Appl. No.:

11/155585

Inventors:

Irwin Gerszberg - Kendall Park NJ, US
Jesse E Russell - Piscataway NJ, US
Robert E Schroeder - Montville NJ, US

Assignee:

AT&T Mobility II LLC - Atlanta GA

International Classification:

H04Q 7/00

US Classification:

455445, 455413, 4554262, 455561

Abstract:

A system and a method for connecting a call through a telecommunications network. A base station, connected to a public switched telephone network, includes a call processor, a memory and a transceiver. The memory includes a database containing dialing instructions for a wireless station for a telephone connection through the public switched telephone network to a destination station. The transceiver receives a call request from the wireless station, and the call processor in response to the call request, accesses the database and dials a call for connection through the public switched telephone network to the destination station based on the dialing instructions for the wireless station.

US Patent:

7844275, Nov 30, 2010

Filed:

Jun 1, 2009

Appl. No.:

12/475683

Inventors:

Irwin Gerszberg - Kendall Park NJ, US
Jesse Eugene Russell - Piscataway NJ, US
Robert Edward Schroeder - Montville NJ, US

Assignee:

AT&T Mobility II LLC - Atlanta GA

International Classification:

H04W 40/00

US Classification:

455445, 455413, 4554262, 455561

Abstract:

A system and a method for connecting a call through a telecommunications network. A base station, connected to a public switched telephone network, includes a call processor, a memory and a transceiver. The memory includes a database containing dialing instructions for a wireless station for a telephone connection through the public switched telephone network to a destination station. The transceiver receives a call request from the wireless station, and the call processor in response to the call request, assesses the database and dials a call for connection through the public switched telephone network to the destination station based on the dialing instructions for the wireless station.

US Patent:

43365876, Jun 22, 1982

Filed:

Jun 29, 1981

Appl. No.:

6/278354

Inventors:

Charles W. Boettcher - Chester NJ
Robert E. Schroeder - Flanders NJ

International Classification:

H02M 7537

US Classification:

363134

Abstract:

A turn-off loss reduction network is applied to the power transistors of a double-ended inverter circuit to reduce power dissipation therein. A switched resonance discharge circuit is utilized to discharge the storage capacitor of the turn-off loss reduction network. Dissipation during discharge is eliminated by including an energy recovery circuit in the discharge network which is operative to return the energy to the input voltage source of the inverter. The gate discharge circuit includes a gated resonant discharge path with an inductive storage medium having a secondary winding or otherwise coupled to return the energy to the input voltage source. At the beginning of the conduction cycle of the power switching transistor, a gate is enabled which allows the capacitor to discharge into the inductive storage medium. When the discharge current reaches its peak value, the gate is disabled, and the energy stored in the inductive medium is discharged to the source by flyback action.

US Patent:

47452994, May 17, 1988

Filed:

Apr 17, 1986

Appl. No.:

6/853173

Inventors:

Wing K. Eng - Stanhope NJ
Robert E. Schroeder - Flanders NJ

Assignee:

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H02J 900

US Classification:

307 66

Abstract:

An off-line switcher includes an auxiliary winding on the secondary side of the power transformer coupled by a power switch to a secondary voltage source in order to provide uninterruptible power to the output from either a primary AC or a secondary DC source. The power switches coupling both primary and secondary source voltages to the power transformers are driven at identical duty cycles by a common regulation control. Differing transformation ratios between primary and secondary sources of power define different operational ranges and determine flow of power based on the magnitude of the primary source of power.

US Patent:

45625484, Dec 31, 1985

Filed:

May 12, 1983

Appl. No.:

6/493923

Inventors:

Brad E. Andersen - Dover NJ
Billy H. Hamilton - Summit NJ
Robert E. Schroeder - Flanders NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G01R 19165
H02H 700

US Classification:

364483

Abstract:

A microcomputer surveillance system is operative to monitor the output signal of a power supply to determine if an alarm limit has been reached and to center the alarm limits around an operating point of the power supply. Sensed output signals are converted to signal frequencies and transmitted optically to counters which accumulate counts indicative of the output signal. A microcomputer controller uses these counts to set alarm limits and determine if an alarm limit has been exceeded.

US Patent:

43575722, Nov 2, 1982

Filed:

Mar 26, 1981

Appl. No.:

6/247899

Inventors:

Brad E. Andersen - Dover NJ
Billy H. Hamilton - Summit NJ
Robert E. Schroeder - Flanders NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

G05F 146

US Classification:

323286

Abstract:

A pulse-width modulated current regulator (FIG. 4) includes a current flare out control (406,407,409,412) to limit current output at low output voltages. Current variation in an output filter inductor (408) is monitored and compared with a reference standard (407). A conduction interval is controlled in response to the comparison in order to limit current flare out.