Abstract: A low-profile fluid manifold includes a tunable passive flow control system through intricate internal flow channels. The low-profile fluid manifold is manufactured using stereolithography (SLA) additive manufacturing to rapidly produce and tune the intricate flow channels to achieve the desired flow characteristics. Further, SLA additive manufacturing is used to build up inlet and outlet orifices in the flow direction, creating sealing surfaces for parallel oriented seals and sealing surfaces. The low-profile fluid manifold is manufactured to be air and liquid tight at the required operating pressures, temperatures, and environments, without the use of traditional fittings.

Abstract: A single-chip microcomputer device contains on-chip program storage in a read-only memory (ROM), and this program may be corrected or updated by patching. The ROM addresses are applied to an off-chip memory device containing one bit for each potential ROM address, and each bit is set to mark the beginning address of code to be patched; an interrupt is signalled when one of these set bits is accessed by an address occurring during operation of the microcomputer. The interrupt causes the processor to branch to an off-chip program memory to insert the patch code. The patch ends in a branch back to the on-chip ROM.

Abstract: An instrument for tuning the photomultiplier (PM) tubes of a scintillation camera to the gamma ray photon energy spectrum of interest. A finely collimated beam of photons from a test isotope is placed on the scintillator crystal in alignment with the photomultiplier tubes in succession. A summing amplifier develops signals that are proportional to the total energy of scintillation events. Lower and upper level discriminators define an energy window and produce output signals, respectively, depending on whether incoming total energy signals are within or above the window level. The output signals are sent to an integrating capacitor. A sensing circuit continuously senses capacitor voltage and drives visual indicators which indicate whether the energy spectrum within the acceptable window predominates or whether energies above the window predominates and the gain of the PM tube under test is adjusted accordingly.