RICHARD P BERTHIAUME
Engineering in Winchester, MA
License number
Massachusetts 9241
Issued Date
Apr 17, 1959
Expiration Date
Jun 30, 2006
Type
Mechanical Engineer
Address
Address
Winchester, MA 01890
Personal information
See more information about RICHARD P BERTHIAUME at radaris.comName
Address
Phone
25 Brenda Dr, Westfield, MA 01085
3 Ridgewood Dr, Auburn, MA 01501
122 Main St, Millbury, MA 01527
15 Hastings St #17, Springfield, MA 01104
7 Starr St, Spencer, MA 01562
Professional information
See more information about RICHARD P BERTHIAUME at trustoria.com
Thermal Control System
Thermal Control System
US Patent:
4388964, Jun 21, 1983
Filed:
Oct 11, 1979
Appl. No.:
6/083972
Inventors:
David W. Almgren - Concord MA
John T. Bartoszek - Bolton MA
Robert M. Lucas - Melrose MA
Richard P. Berthiaume - Winchester MA
Richard H. Spencer - Winchester MA
William H. Saia - Danvers MA
John T. Bartoszek - Bolton MA
Robert M. Lucas - Melrose MA
Richard P. Berthiaume - Winchester MA
Richard H. Spencer - Winchester MA
William H. Saia - Danvers MA
Assignee:
Arthur D. Little, Inc. - Cambridge MA
International Classification:
G05D 2300
US Classification:
165 32
Abstract:
In a space shuttle, payloads are individually temperature controlled by means of a liquid control loop in heat exchange relationship with both the payload and a radiator or shuttle cold plate. The liquid pump is driven at a variable speed to control the heat transferred between the load and the radiator or cold plate, and the motor may be reversed to by-pass the radiator through check valves. The radiator includes heat pipes seated in elongated, high thermal conductivity extrusions and retained therein by elongated springs. The motor is a brushless DC motor isolated from the pump by a magnetic clutch and thermal isolator. The motor is driven by a digital circuit which provides a single pulse to each set of windings during each energizing time frame. The width of that pulse is modulated to provide for speed control. Pulse width modulation is by means of a one-shot, the pulse duration of which is controlled by a speed control signal.