Abstract: A rectractable hydrofoil for watercraft wherein a linking mechanism connects all hydrofoils to a retaining assembly. The application of an external force to a hydrofoil above a threshold causes the release of the retaining means without requiring the reaction of the operator. A control assembly within the hull is utilized by the operator to complete the movement of the hydrofoil to an aft retracted position. The retaining assembly includes a releasable securing means for maintaining the hydrofoils in the retracted position.

Abstract: Automatic treatment of a drain system is provided by the controlled injection of a bio-active liquid at established intervals into the drain system. A container of the treatment liquid is provided with a pump coupled between the container and the drain. Fluid level sensing means is located in the container and fluid temperature sensing means is located in the drain system. When the temperature is within range and the fluid level is sensed, the pump is periodically operated to inject a quantity of fluid directly into the drain system without operator control.

Abstract: An athletic brace to be worn with conventional shoulder pads for reducing the chance of subluxation of the shoulder which includes a wide elastic member that is internally wrapped about the upper arm and brought across the chest for attachment to the front of the shoulder pads. The elastic member tends to limit both abduction and external rotation of the upper arm of the user thereby reducing the chance of the athlete reaching the point that tends to stress the glenohumeral joint to the point of subluxation or dislocation.

Abstract: Novel attractant composition for use with synanthropic flies which includes indole and skatole, a pheromone, trimethylamine hydrochloride, and a suitable carrier.

Abstract: A self-propelled irrigation ditch cleaner for use by a single operator which includes a side-oriented conveyor to transport debris up and out of the ditch for the later collection.

Abstract: Portable testing apparatus for low current circuit breakers which enables short circuit and constant current tests to be conducted at the breaker panel. A first container includes a parallel array of resistive loads each under control of a corresponding relay. Low voltage control circuitry is provided in a second container and permits variation of the load appearing in series with the circuit breaker under test. The short circuit test can be performed at the first container which operates at the line voltage.

Abstract: A safety device for screen and storm secondary doors in which a movable rod is horizontally mounted on the door jamb proximate to the latch receiving mechanism. The closure of the inner or primary door urges the rod into position so as to disable the latching mechanism of the screen door. The opening of the primary door enables the rod to be withdrawn thereby permitting the secondary door to be opened.

Abstract: Demonstration apparatus for showing the process of vapor phase deposition and extractive metallurgy is disclosed wherein a vacuum vessel is provided with an inner vessel containing a resistive heater and source material. A condenser is utilized to promote deposition of material on the inner vessel in a controlled manner. A furnace containing a resistive heater and the source material is supported in the inner vessel.

Abstract: An animal identification tag of improved flexibility wherein the connection between shaft and tab is characterized by concentric ridges and depressions in a circumferential region having reduced thickness.

Abstract: Apparatus for the production and collection of bee venom by the use of electrical conductors disposed in the colony with a fibrous pad therebelow. A square wave voltage is applied to adjacent conductors to excite bees and cause them to deposit venom in the underlying pad.

Abstract: A method of making a multiplicity of microwave integrated circuits is disclosed wherein a thin glass substrate is etched to contain both via holes and large area holes which receive discrete active devices therein. An electrically and thermally conductive carrier is adhered to one surface of the glass substrate with the electrical interconnections and circuit components formed on the opposing surface of the glass substrate. The method enables a multiplicity of microwave circuits to be made and tested by batch processing techniques prior to division into individual circuits.

Abstract: Apparatus for monitoring the status of and controlling faults at remotely-located components in a single line communications system wherein return data signals from the components are transmitted in the 50 kHz to 200 kHz range, and coupled to the low pass filters commonly used to bypass the active components, thereby permitting the return of signals to the system head-end.

Abstract: A system and method for monitoring body-function parameters including bloodflow, intracranial pressure and blood pressure during cranial observation of an individual wherein different pharmacological agents are added to an intravenous fluid to compensate for changes in the parameters.

Abstract: A locating system for sport objects where the user carries an r.f. transmitter, and the sport object has a conductive stripe thereon which increases the load on the transmitter as it moves closer to the sport object. The conductive stripe has an effective length of one-quarter wavelengths at the signal frequency to act as a tuned antenna.

Abstract: A dispenser for tablets from a number of containers each mounted in an inverted position on a rotating support member. Each container is provided with a receiving cap having two angularly disposed passages therein. Each cap is rotatably mounted in a corresponding recess in the support member. The base of the recess is provided with an angularly disposed channel which when aligned with one passage of the receiving means permits a tablet to pass through to the user. The location and angular orientation of passage and channel when in registration results in the dispensing of a single tablet from a container through the support member.

Abstract: A processing system for microwave signals including a conductive housing having a waveguide probe for the input, a coaxial output connection and a section for receiving a microwave integrated circuit therein. The section contains two high impedance recesses therein, each of which is spaced a quarter-wavelength at microwave frequencies from the input and output portions of the integrated circuit. The high impedance recesses, reflected to the input and output sections, provide low impedance coupling therebetween for microwave signals. A dielectric member is interposed between the ground plane of the integrated circuit and the conductive housing to provide dc isolation therebetween and enable a single polarity voltage supply to establish the bias and operating voltages for the microwave integrated circuit.

Abstract: A support structure for flexible containers, such as plastic shopping bags, which is both collapsible for storage and readily assembled to support the flexible container in an open position for the placement of items therein, especially during reuse of the container.

Abstract: A sport article for tossing about by the hand of the user which includes light emitting diodes and a power source configured therein to provide uniform surface contours and not alter the flight characteristics thereof.