Abstract: A physical exercising device having a handle to be grasped by an exercising person; an elongate frame having a plurality of attachment points disposed along the frame; an elastic resistance member having one end attached to the frame and another end; a fixed pulley fixedly attached to the frame and a detachable pulley detachably connectable to any one of said attachment points; a flexible wire threaded through the fixed pulley and the detachable pulley, having a first part in operative engagement with the other end of the elastic resistance member, and another part of the wire attachable to the handle for manually applying a stretching force to the elastic resistance member by the exercising person. The physical exercising device wherein the frame is composed of a vertical stem having an upper part and a top member extending away from the top part, and wherein the attachment points are disposed along the vertical stem and the top member.

Abstract: A key and lock system for enabling access to at least one protected domain in response to an enabling signal. The system includes a key arrangement capable of generating a digital key code composed of least one and zero bits; an electronic device arranged for receiving the digital key code, a code-containing device for containing at least one further digital code, and a code-comparing arrangement connected to the electronic device and the code-containing device for generating the enabling signal when the digital key code is equal to the further digital code. The system further includes at least one keylock having a keyslot arranged to receive the key, and a digital code reader connected to the keylock for reading the digital key code, and an electronic gating arrangement for deriving from the key code a steering signal for steering the key code into the electronic device. The electronic device may be a digital computer which can have outputs for controlling an engine.

Abstract: In accordance with the invention there is provided a central vehicle resource management system including vehicle status sensing apparatus for generating a plurality of vehicle status signals, central electronic logic interpretation apparatus coupled to the status signals for interpreting the status signals, and central annunciating apparatus coupled to an output of the interpretation apparatus for annunciating to a vehicle's driver interpreted status indications.

Abstract: Oil spill collecting device for collecting an oil layer spilled on a water surface. It has at least a first floating oil collecting arm, a vortex generator disposed at one end of the collecting arm, at least one elongate water inlet with two facing side edges in the vortex generator in fluid communication with a leading side of the collecting arm facing the oil layer. It further has a bottom water outlet, a moving arrangement for creating relative movement between the water surface and the collecting arm for forming a vortex in the vortex generator, and an oil drawing arrangement for drawing oil collected in a pocket forming in the vortex.

Abstract: Echo locating apparatus for a vision-impaired person which includes: a sound emitter for emitting a stream of sound bursts of ultrahigh frequency; at least one receive channel having a microphone for receiving echoes of the sound bursts and generating echo signals; an echo profile detector for generating an echo profile signal of each echo signal; a delay circuit for adding a variable delay to the echo profile signal, wherein the variable delay increases with the distance to the reflecting at a diminishing rate of increase. The sound burst emitter is preferably arranged to emit a beam of sound bursts having a given beam angle that can be pointed in any direction.

Abstract: Echo locating apparatus for a vision-impaired person which includes: a sound emitter for emitting a stream of sound bursts of ultrahigh frequency; at least on receive channel having a microphone for receiving echoes of the sound bursts and generating echo signals; an echo profile detector for generating an echo profile signal of each echo signal; a delay circuit for adding a delay to the echo profile signal, consisting of the sum of a fixed delay and a variable delay that increases with the distance to the object reflecting the echo. The sound burst emitter is preferably arranged to emit a beam of sound bursts having a given beam angle that can be pointed in any direction.

Abstract: An internal combustion engine, which has a combustion chamber with a coordinated piston where the combustion chamber is divided into a first and second section, and where the piston has an extension which slides into the second chamber section during the later part of the piston's upward movement, and compresses the fuel-air mixture contained in that chamber section to a pressure somewhat higher than the pressure in the first section. The second chamber wall and the piston extension has two air passages, which are coordinated in such a way that during the last part of the compression cycle, the air passages overlap and provide an escape passage for the fuel-air mixture in the second section which is released suddenly into the first combustion chamber section and sets the fuel-air mixture in that section in a swirling motion, which helps to better mix the fuel and the air, and facilitates the ignition process of a lean mixture when used with a suitably adapted, extended electric spark ignition.

Abstract: An ignition system for internal combustion engines employing two coordinated power sources which, together, provide a spark of much increased intensity and with extended duration. The first of the coordinated power sources is generally similar to the conventional ignition system employing an ignition coil with a primary and secondary winding, the secondary winding generating a high voltage impulse of very high voltage and low current value and of short duration. The second power source is a storage capacitor which is connected to a direct current power supply which, through a limiting resistor, charges the capacitor to a voltage which is too low to initiate a spark, but high enough to sustain an arc of a controlled high current value for increased duration, once a preliminary spark has been generated across the spark gap at the moment an energizing current in the primary winding of the ignition coil is interrupted.

Abstract: A digital circuit for converting a delta modulated signal to a binary coded signal without producing an interim analog signal. The principal portions of the circuit are an up-down counter, a read-only memory the instantaneous output of which is controlled by the up-down counter, logic for driving the up-down counter in response to an incoming delta modulated signal, and a scanner for producing time-spaced pulses in response to the instantaneous outputs of the memory. A comparator is also included for driving the up-down counter relatively slowly to compensate for drift by ensuring that, over relatively long periods such as a few seconds, the output of the up-down counter oscillates around its mid-value.

Abstract: A printed circuit card adapter for mounting on an elongated stud comprises a bar-like member having at least one surface area having a contour substantially conforming to the surface of the elongated stud upon which it is mounted. Guide means are disposed on the member for receiving an edge of a printed circuit board. The longitudinal axis of the guide means is disposed substantially parallel to the longitudinal axis of the member. An embodiment of the adapter employs a web to join together pairs of members to produce a strip comprising a plurality of adapters. Means are provided in the web for enabling one to readily divide the strip into one or more adapters as required.

Abstract: An asynchronous, regenerative, digital repeater for use in bipolar digital signalling systems includes an amplifier for receiving and amplifying incoming signals, a first monostable multivibrator for producing regenerated pulses responsively to the output of the amplifier, an output circuit for producing a bipolar pulse train responsively to the output of the multivibrator, and a second multivibrator for inhibiting the first multivibrator for a predetermined interval following the trailing edge of each output pulse to prevent the first multivibrator from responding to the electrical overshoot at the trailing edges of the incoming pulses.