LLOYD W MCSPARRAN
Engineers in Erie, PA
License number
Pennsylvania PE018981E
Category
Engineers
Type
Professional Engineer
Address
Address
Erie, PA 16511
Personal information
See more information about LLOYD W MCSPARRAN at radaris.comName
Address
Phone
2406 Traci Dr, Pittsburgh, PA 15237
Pittsburgh, PA
2406 Traci Dr, Pittsburgh, PA 15237
2406 Traci, Franklin Center, PA 15237
Professional information
System For Automatically Controlling An Electrically Propelled Traction Vehicle Traversing A Gap In Wayside Source Of Power
US Patent:
4301899, Nov 24, 1981
Filed:
Apr 21, 1980
Appl. No.:
6/142292
Inventors:
Lloyd W. McSparran - Erie PA
Paul T. Ryan - Erie PA
Russell M. Smith - North East PA
Paul T. Ryan - Erie PA
Russell M. Smith - North East PA
Assignee:
General Electric Company - Erie PA
International Classification:
B60L 100
US Classification:
191 3
Abstract:
A plurality of stationary markers (A, B, C, and D) are symmetrically placed at predetermined locations in the right of way of an electrically propelled traction vehicle on opposite sides of a transition point coinciding with a gap (14) between adjacent sections (13a, 13b) of a wayside conductor. Proximity sensing means (PSR, PSL) on the vehicle provide discrete output signals on a first line (43) upon passing the first and third markers (A and C) and on a second line (44) upon passing the second and fourth markers (B and D). Receiver logic means (42) includes means (108, 111-115, and 118-127), responsive to the output signals on the first and second lines, respectively, for producing a first control signal (on line 51) during the first-to-third marker interval and a second control signal (on line 50) during the second-to-third marker interval. Means (24, 25, 55, and 60-71) is provided for disconnecting the vehicle's propulsion system (27, 29, M) from a current collector (16) either in delayed response to the start of the first control signal or in immediate response to the start of the second control signal, whereby the vehicle will coast unpowered as its current collector slides across the gap in the wayside conductor. Additional means (56, 75, 82-85) is provided for reconnecting the propulsion system in response to the termination of both of the control signals.
Series Parallel Transition For Power Supply
US Patent:
4339704, Jul 13, 1982
Filed:
Jul 7, 1980
Appl. No.:
6/166680
Inventors:
Lloyd W. McSparran - Erie PA
Russell M. Smith - North East PA
Russell M. Smith - North East PA
Assignee:
General Electric Company - Erie PA
International Classification:
H02M 700, H02P 900
US Classification:
322 90
Abstract:
A multi-winding a-c electric power supply is connected to a d-c load circuit via a power rectifier assembly comprising at least two legs connected in parallel across the load circuit. Each leg has at least four serially interconnected unilaterally conducting devices. A first one of the power supply windings is connected between the two rectifier legs at points between first and second devices thereof, and a duplicate winding (voltages of both windings are in-phase and of equal amplitude) is connected between the legs at points between third and fourth devices thereof, whereby the windings are effectively connected in parallel. The respective junctures of the second and third devices in all of the rectifier legs are interconnected by switching means which, upon switching to a closed circuit state, short circuits these junctures and thereby changes the connection of the windings from parallel to series.