Abstract: A reduced-area, read-only memory, including a programmable read-only memory, accomplished with a first step of removing one word address line from the word decoder input and one bit address line from the bit decoder input. The number of decoder output lines is thus cut in half. Adjacent line-driving transistors are driven by the same decoder output line. The removed word decoder input, and its complement, drive auxiliary bit lines; the removed bit decoder input and its complement drive auxiliary word lines. Circuitry connected at crossovers of word lines with auxiliary bit lines and bit lines with auxiliary word lines selectively suppress the selection of one line of each pair of lines that is driven by a single decoder output. The invention is particularly effective when utilized with Schottky diodes insulated from the semiconductor substrate. In the memory cells the Schottky diodes can be connected in series with voltage-programmable resistors to provide a reduced-area, programmable, read-only memory.

Abstract: A shielded transformer of the type particularly used as an isolation transformer, has a greatly reduced interwinding capacitance. Metallic overlap is provided, completely across a juncture of the metallic shield with faces of the windows in the core, and completely across a juncture of the metallic shield with the metallic case. This metallic overlap is tolerant to misalignments and variations in fit, completely eliminating gaps that cannot be economically made small with the butt joint of present art. The overlap comprises grooves in faces of the window or in the case. In a second embodiment, the overlap comprises grooves in channels on faces of the window and on the case. The shield fits into the grooves.

Abstract: An improved heat sink device for transferring heat from a heat generator to lower-temperature surroundings comprising a device-embedded compound that absorbs heat, delaying temperature rise in the heat generator, at a specific temperature by melting or entering into an endothermic chemical change or reaction and which is absorbed and retained within the device by a mesh or fabric of a multiplicity of fibers.

Abstract: An electric indicator that includes an indicating light mounted in a small case containing electronic circuitry, a numerical keyboard, and a battery, the case being attached to a door or door frame, to show the returning user of the indicator whether or not the door has been opened since the indicator was last enabled by the user, typically by entering a secret sequence of numbers into the keyboard. An auxiliary input jack, for electrical connection to other doors and windows, is provided so that the indicator can indicate whether any of several doors and windows has been opened. An auxiliary output jack is provided for a remote indicating light, usually inserted into the peephole existing in many front doors so that the indicator light may be seen from the outside before opening the door. The same output jack may be used for triggering separate audible alarm devices. The indicator is easily adapted for use with drawers, bins, or windows if so desired.

Abstract: A trailer tongue extender that is attached to the tongue of a boat trailer as a first step in launching the boat, allowing the vehicle that is backing the trailer into the water to keep back from the uncertain ground near the water's edge. The extender latches into a receptacle that is permanently installed on the trailer tongue allowing the attachment or removal of the extender in three steps without the use of tools, bolts, or pins.

Abstract: A method for changing each of and/or arranging the sequential order of audio effects circuit modules constructed to be received in any electronic system so predisposed, noiselessly, without the generation of spurious noise signals into the main signal path of the system, during performance and all stages of operation, maintaining, all the while, the uninterrupted flow of the main signal path through the system. The effects box described herein includes a main housing containing a main circuit apparatus, and having module-receiving recesses. Modules each have multiple module contact elements positioned to contact corresponding recess contact elements when the module is installed.

Abstract: An improved frame, and manufacturing method, for sport rackets used in games such as racquet ball, tennis, court tennis, squash, squash tennis, badminton, and lacrosse. A single laminated piece forms the major portion of both the head and the handle. The laminated piece consists of laminae of fibrous tape and laminae of thermoplastic.

Abstract: A collapsible-helix antenna, continuously variable in length and self-resonant with a uniform resistance over an exceedingly wide frequency range, for example 2-32 mHz. The collapsible-helix is continuous in two sections: a fixed-length, shorted-out section wherein the turns of the helix are collapsed upon each other; and a variable-length section wherein the helix has an approximately constant pitch, and is a radiating element. Means are provided to drive turns of the helix from either section to the other, providing a helix with continuously variable physical and electrical length.