JOSEPH R THIBODEAU
Electrician in Dedham, MA
License number
Massachusetts 2806-RE
Expiration Date
Jul 31, 1995
Type
Journeyman Electrician
Address
Address
Dedham, MA 02026
Personal information
See more information about JOSEPH R THIBODEAU at radaris.comName
Address
Phone
5 Benoit St, Fitchburg, MA 01420
6 N Street Cir, Walpole, MA 02081
3 Tennys Ct, Newburyport, MA 01951
51 Tewksbury St, Andover, MA 01810
8 Robinson St, Fitchburg, MA 01420
Professional information
Faulted Current Indicators And Inrush Restraints Therefor
US Patent:
5003426, Mar 26, 1991
Filed:
Jun 30, 1989
Appl. No.:
7/374216
Inventors:
Thomas Yeh - South Weymouth MA
Joseph R. Thibodeau - Dedham MA
Joseph R. Thibodeau - Dedham MA
Assignee:
Sigma Instruments, Inc. - Weymouth MA
International Classification:
H02H 308
US Classification:
361 59
Abstract:
A faulted circuit indicator includes an inrush restraint circuit that suppresses a trip signal when an inrush current rises from below a minimum value to a trip value within a predetermined time and then drops again to another value such as the trip value. According to various aspects the restraint ends after a fixed time or after a variable time. According to another aspect a second trip circuit overrides the inrush restraint circuit when the current rises a given amount beyond the first trip value.
Condition-Initiated Load Control Circuit
US Patent:
3995202, Nov 30, 1976
Filed:
Nov 26, 1974
Appl. No.:
5/527187
Inventors:
John J. Powers - East Weymouth MA
Joseph R. Thibodeau - Dedham MA
Joseph R. Thibodeau - Dedham MA
Assignee:
Sigma Instruments, Inc. - Braintree MA
International Classification:
H03H 900
US Classification:
317124
Abstract:
In the device disclosed, a load is energized from energy-carrying lines. A detector responsive to a cyclically recurring physical condition, such as daylight, places a switch either in an operating mode or an idling mode in response to the absence of the condition. A control shifts from an idling mode to an operating mode in response to the detector being in a given one of its modes and shifts back to the idling mode after a given time less than the period of the cyclically recurring physical condition. A circuit responds to the control being shifted to its operating mode in response to the given one of the modes of the detector and responds to the detector simultaneously being in the operating mode so as to connect the lines to the load.
Fault Indicator With Inrush Restraint
US Patent:
5045778, Sep 3, 1991
Filed:
Jan 30, 1989
Appl. No.:
7/303761
Inventors:
Joseph R. Thibodeau - Dedham MA
Matthew G. Dillon - Hingham MA
Matthew G. Dillon - Hingham MA
Assignee:
Sigma Instruments, Inc. - Weymouth MA
International Classification:
H02H 308
US Classification:
324133
Abstract:
An inrush restraint in a fault indicator disables trip in response to the current in the cable being monitored changing from reset to trip values within a predetermined period.
Fault Indicating Means
US Patent:
4980790, Dec 25, 1990
Filed:
Jan 17, 1989
Appl. No.:
7/297959
Inventors:
Joseph R. Thibodeau - Dedham MA
Assignee:
Sigma Instruments, Inc. - Weymouth MA
International Classification:
H02H 704
US Classification:
361 38
Abstract:
The reset circuit of a fault indicator is coupled to a transformer secondary winding by a cable having an elongated conductor and a resistance close to the secondary winding. The resistance is capable of withstanding a minimum transient impulse of 10 kv.