1. A method of making an embedded acoustic device, comprising:
photostructuring plumbing in a ceramic volume by selective laser exposure of the ceramic volume; and
forming an acoustic device in the plumbing.
2. The method of claim 1, wherein the acoustic device comprises at least one of a phased array emitter, analog mixer or acoustic pump.
3. The method of claim 1, wherein the ceramic volume further includes at least one of a photostructurable chemical device, photostructurable electrical device, photostructurable magnetic device, photostructurable mechanical device or photostructurable optical device.
4. The method of claim 1, further comprising:
forming a port in an outer surface of the ceramic volume; and
forming a conduit interfacing the port to the acoustic device.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A brake control valve including a volume, an emergency vent valve connected to an interface of a pipe bracket, the interface including first and second brake pipe ports and a volume port, the emergency vent valve comprising:
a vent valve selectively connecting the first brake pipe port to a vent port;
a vent piston controlling the vent valve, the vent piston including a first side connected to the volume port and a second side;
an emergency piston including a first side connected to the volume port and a second side connected to the second brake pipe port;
an accelerated application valve selectively connecting the volume port and the second brake pipe port to the vent port in response to pressure from the volume port;
a discharge valve connected to the emergency piston and selectively interconnecting the second side of the vent piston, the vent port, the volume port and the accelerated application valve as a function of the displacement of the emergency piston;
the discharge valve’s connection of the vent port to the second side of the vent piston and the volume port is a variable orifice whose opening varies as a function of the displacement of the emergency piston; and
the discharge valve disconnects the volume port from the accelerated application valve for the brake release position of the emergency piston, and connects the volume port to the accelerated application valve for the brake apply position of the emergency piston.
2. A brake control valve including a volume, an emergency vent valve connected to an interface of a pipe bracket, the interface including first and second brake pipe ports and a volume port, the emergency vent valve comprising:
a vent valve selectively connecting the first brake pipe port to a vent port;
a vent piston controlling the vent valve, the vent piston including a first side connected to the volume port and a second side;
an emergency piston including a first side connected to the volume port and a second side connected to the second brake pipe port;
an accelerated application valve selectively connecting the volume port and the second brake pipe port to the vent port in response to pressure from the volume port;
a discharge valve connected to the emergency piston and selectively interconnecting the second side of the vent piston, the vent port, the volume port and the accelerated application valve as a function of the displacement of the emergency piston; and
the discharge valve disconnects the volume port from the accelerated application valve for the brake release position of the emergency piston, and connects the volume port to the accelerated application valve for the brake apply position of the emergency piston.