Abstract: A high flow calibration test point has entry, inlet, and outlet ports and a spring-biased plunger that in one position provides communication between the entry port and both the inlet and outlet ports, in another position provides communication between the entry port only with the outlet port, and in yet another position allows communication only between the inlet and outlet ports.

Abstract: A high flow calibration test point has entry, inlet, and outlet ports and a spring-biased plunger that in one position provides communication between the entry port and both the inlet and outlet ports, in another position provides communication between the entry port only with the outlet port, and in yet another position allows communication only between the inlet and outlet ports.

Abstract: A disc brake caliper assembly for moving brake pads straddling the brake disc against each side of a brake disc comprises two tongs pivotably supported. The tongs have brake heads and pads at one end and power nut support pins journaled at the other end. The power nuts are pivotally supported from the power nut support pins. A power screw extends between the tongs and has external threaded ends threaded in the power nuts such that rotation of the power screw will force the power nuts apart thus causing the brake pads to engage the brake disc.

Abstract: By calculating energy used by friction brake equipment, the amount of friction brake shoe/pad wear is monitored. As amount of energy supplied reaches a percentage of the friction brake shoe/pad energy design limit, and indication for inspection is provided. If the supplied friction energy continues to increase the brake material must be replaced. The software logic limits are tunable for custom configuration by maintainace personnel. This invention measures amount of friction effort supplied with respect to time and distance in a software controller brake system and allows the software to determine when the friction brake material must be replaced on actual data and avoids costly damage from braking with worn out shoes/pads. This invention annunciates through the software when the friction material requires inspection and replacement and provides software logic to indicate remaining material thickness.

Abstract: By calculating the energy used by the friction brake equipment, the amount of friction brake shoe/pad wear can be monitored. As the amount of energy supplied reaches a percentage of the friction brake shoe/pad energy design limit, an indication for inspection is provided. If the supplied friction energy continues to increase beyond this point, the brake material must be replaced. The software logic limits are tunable for custom configuring by the transit authority and maintenance personnel. This invention measures the amount of friction effort supplied with respect to time and distance in a software controlled brake system. Furthermore, this invention allows the software to determine when the friction brake material must be replaced based on actual data, which simplifies the maintenance personnel operation procedures, maximizes brake material wear, and avoids costly damage from braking with worn out shoes/pads.

Abstract: A brake effort monitor for railcar braking systems includes means connected to receive a brake effort request signal and a vehicle speed signal for generating an energy requested signal. Another device is connected to receive a brake effort actual signal and a vehicle speed signal for generating an actual energy signal. There is a mechanism connected to receive the energy requested signal and add it to one of a previous energy requested signal and a predetermined value for generating an energy requested sum signal. A device is connected to receive the actual energy signal and add it to one of a previous actual energy signal and a predetermined value for generating an actual energy sum signal.