Abstract: A stoplamp modulator module electronic device for use in a currently produced vehicle to provide an improved rear signal light to reduce rear-end collisions. The electronic device is adapted for attachment to a standard center high-mount stoplamp installed in the rear of the vehicle. The device is designed specifically to visually alert, using light signals, a trailing vehicle that the vehicle with electronic device is traveling below a predetermined threshold velocity or has stopped. The device receives power from the vehicle's battery voltage and is connected to a chassis ground. Also, the device receives inputs from the brake-light switch and the vehicle speed pulser. The electronic device includes appropriate interfaces for receiving pulse inputs giving an indication of the vehicle's velocity.

Abstract: A set of three input, three output bubble logic gates forms all of the possible distinct output functions for conservative three variable gates. The magnetic interaction between single wall domains propagating through separate channels defined by closely spaced circuit element paths causes the domains to switch to or remain on alternate paths via between-path transfer means in a predetermined fashion. In addition to vertically graded element transfer means, several new circuit arrangements are introduced including non-graded elements, strong and weak S-curves, elements having uneven gradation, and other circuit techniques. A group of primitive realizations are described which can be combined to produce other gates having output functions in each of 31 equivalence classes. A methodology for using the gates in logic design is suggested, and several new building block gates producing functions of two variables are presented.

Abstract: Closed loop propagation channels for magnetic bubbles are mutually exclusively accessed by means of two different sets of repeating sequences of discrete, pulsed magnetic drive field orientations. A closed loop bubble propagation circuit is driven by a repeating sequence of pulsed orientations in which a plurality of interlaced subsets of the sequence operate corresponding sections of the circuit. A closed loop zigzag circuit traversing sections of the loop parallel to the sides of an equilateral triangle is driven by a sequence of pulsed field orientations aligned respectively with the sides of the equilateral triangle. Continuous overlay circuits are introduced driven by sequences of discrete nonorthogonal, pulsed drive field orientations repetitively realigning with consecutive segments of the overlay circuit.

Abstract: Magnetic bubble logic circuits performing the functions of various forms of flip-flops and decoders are presented. Set-reset and trigger flip-flops are constructed from specialized 3--3 conservative bubble logic circuits. Two forms of tree-type decoders employing crossovers of bubble tracks are illustrated for generating all possible product permutations of a plurality of input variables. Planar decoders and cross point circuits without crossovers are combined in matrix form to provide a multi-variable decoder without internal crossovers.

Abstract: Overlay patterns of discrete circuit elements for field-accessed, magnetic bubble propagation are driven by repetitive sequences of pulsed magnetic fields directed along axes which are parallel to consecutive overlay elements or segments with different orientations. A chevron circuit is driven by a series of reversing pairs of pulsed fields aligned alternately with the legs of the chevron elements. Two opposite parallel chevron circuits are driven in the same direction by the same sequence of pulsed fields. A broken element circuit, resembling a chevron circuit with the vertices removed, is driven in a similar manner.