Abstract: A portable hot tub (10) having a pair of upper member covers (14) removably connectable to each other at distal ends by a pair of sliding lock members (18). The portable hot tub (10) further has at least four vertical support members (20). A portable hot tub (10) further has a tub liner (12) is securely fastened around a top periphery to the pair of upper member covers (14) by horizontal support members (13) which are inserted within a wrap of the tub liner (12) within the upper member covers (14). The portable hot tub (10) further has a jet assembly (22) removably positioned within the tub liner (12). A hose nozzle (24BAA) is connected between the first tube elbow (24BA) and an outlet hose (32). The portable hot tub (10) further has a filter assembly (26) connected to a lower end of the first tube (24B) by a filter T-connector (26A). The portable hot tub (10) further has a motor/heater unit (36) is connected to the inlet hose (30) and the outlet hose (32).

Abstract: A laser power supply includes a dc to dc converter which feeds a multiplier-rectifier circuit to provide a high dc voltage output. The converter includes a power transistor which is subject to a control of its on time to provide constant current regulation. A smooth regulation is provided by a proper timing of the turn off signal to the power transistor by sampling the emitter signal of a transistor which is included in a synthesized thyristor, the thyristor being operable to hog base current from the power transistor. The converter is coupled to the output multiplier-rectifier by a transformer which has a feedback winding connected in series with the base of the power transistor.

Abstract: A sealing fixture in combination with a cap member provides a fluid-tight compression seal between an elastomeric septum and a tubular body. The septum is disposed transversely on a first end of the sealing fixture, which is of cylindrical configuration with an axial bore. A second end of the sealing fixture fits over the tubular body. The cap member covers the septum by being screwed down over a threaded portion of the outer wall of the sealing fixture. An aperture is provided in the cap member through which an injection device can be inserted to puncture the septum so as to deliver a quantity of fluid to, or to remove a quantity of fluid from, the tubular body via the bore in the sealing fixture. An outer wall portion of the sealing fixture adjacent the first end thereof is tapered inwardly to form a sharp junction with an inner wall portion of the sealing fixture. This inner wall portion adjacent the first end of the sealing fixture is parallel to the axis of the bore.