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| Patent # | Description |
|---|---|
| US-3,979,575 |
Portable electric oven A portable and/or stationary electric oven in which the heating element takes the form of a silicone rubber sheet wrapped around the walls of the oven, and which... |
| US-3,979,574 |
Tank type engine heater An electric tank heater for heating the engine coolant system of an automotive vehicle comprises a tubular tank shell having an open end in which is secured an... |
| US-3,979,573 |
Microwave oven door hinge A microwave oven has an up-opening oven door which is hinged to be movable in an arcuate path. The door moves between a closed lower position covering an... |
| US-3,979,572 |
Induction heating apparatus An induction heating apparatus which comprises a ferromagnetic member; a non-magnetic highly conductive member connected to the ferromagnetic member on one side... |
| US-3,979,571 |
Buckled spring switch mechanism with latching pushbutton A switching mechanism has at least two terminals partly positioned within a housing and a reciprocal actuator movable within the housing. A coil spring, under... |
| US-3,979,570 |
Switching apparatus An on-off switch comprising a contact element of conductive elastomeric material for establishing a current path between a pair of terminals, a movable member... |
| US-3,979,569 |
Water level sensing device having rupturable hygroscopic-type switch
actuator A water level sensing device includes a housing having a bottom opening and a micro-switch mounted in the housing above its bottom and provided with a spring... |
| US-3,979,568 |
Keyboard switch assembly having raised contacts supported by helicline
legs on a common conductive sheet A switching device having a movable contact that is an integral part of a metallic support substrate and is supported above the support substrate by a plurality... |
| US-3,979,567 |
Microphone coupler for hearing aid having inverted conical end
configuration A microphone coupler or artificial ear for coupling a microphone and a hearing aid to test the operational characteristics of a hearing aid includes a cavity... |
| US-3,979,566 |
Electromagnetic transducer An electromagnetic transducer wherein magnetic forces are transmitted via an armature that has an elongated regular, or serpentine, tubular shape, and that is... |
| US-3,979,565 |
Metal enclosed transducer assembly A thick layer of epoxy resin is used to bond together the piezoelectric member and a stainless steel cap to form an acoustic transducer having a broad frequency... |
| US-3,979,564 |
4-Channel stereo recording and reproducing method A method for recording and reproducing a 4-channel stereo signal wherein the reproduced signal can be used with conventional discrete signal or matrix... |
| US-3,979,563 |
Communication systems of key telephone systems In a communication system of a key telephone system wherein a key telephone selected by electric power supplied from a key service unit is started through a... |
| US-3,979,562 |
Decoder An improved decoder is settable to recognize the digits of a preselected code and utilizes two complementary semi-conductor digital counters. Such counters draw... |
| US-3,979,561 |
Level-code encoded multiplexer Apparatus for multiplexing a large number of digital signals onto a few aog channels using a level code encoded multiplexer. Each digital signal to be... |
| US-3,979,560 |
Telephone answering system with ring detector A telephone answering system is provided which includes an automatic ring delay circuit which sets the system so that the first call received after the system... |
| US-3,979,559 |
Data modem having line verification and automatic disconnect features Modems having line verification circuitry for automatically advising that a direct distance dialed network has been connected between the communicating modems... |
| US-3,979,558 |
Signaling system 1. In a speech privacy transmission system, means for analyzing speech currents into component frequency band currents in a plurality of separate circuits, a... |
| US-3,979,557 |
Speech processor system for pitch period extraction using prediction
filters A computational algorithm and an implementation thereof is described herein for determining the pitch period of voiced speech in real time. All processing is... |
| US-3,979,556 |
Scanning control arrangement for a telecine system using a flying spot
tube In a telecine system using a flying spot tube, the latter is used for scanning, at the same time as the film, marker zones delivering, upon being scanned, marker... |
| US-3,979,555 |
Histogram equalization system for display improvement A histogram equalization system that adaptively redistributes the intensity coding of the video in order to provide an equal number of elements at all display... |
| US-3,979,554 |
Suspension insulator The proposed suspension insulator is intended to ensure insulated suspension of power line wires to cross-arms of power line supports. The insulator comprises two... |
| US-3,979,553 |
Spacer-dampers for power transmission lines A spacer-damper for overhead transmission lines of at least three subconductors comprising arms, one for each subconductor, mounted by resilient damping means to... |
| US-3,979,552 |
Coolant displacement material A coolant displacement material for a liquid cooled transformer consisting of a plurality of glass spheres having one or more closed voids to provide a specific... |
| US-3,979,551 |
Arc furnace fumes control system For use with an electric arc melting furnace having a crucible and an upwardly directed mouth covered by a roof, and a device coupled to the roof for projecting... |
| US-3,979,550 |
Pre-printed latent image spirit duplicating masters A pre-printed spirit duplicating master containing visible imaged material and latent imaged material for use in preparing copies for self-instructional... |
| US-3,979,549 |
Composite of metal and thermoset plastic An integrally bonded composite structure of a substrate part or layer of metal or the like, an elastic interface layer, and a thermoset plastic wall or layer... |
| US-3,979,548 |
Polyurethane coated safety glass A scratch-resistant polyurethane coating for safety windows is made by curing a sheet of a liquid composition comprising (1) a polyglycol ether resulting from... |
| US-3,979,547 |
Paint for use on rubbers When polyurethane paint compositions are applied to natural or synthetic rubbers, as the paint composition dries and cures, the paint may "orange-peel," i.e. it... |
| US-3,979,546 |
Alkoxysiloxanol modified surfaces Surfaces of inorganic materials are rendered hydrophobic by treating the inorganic materials with alpha-alkoxy-omega-siloxanols which are obtained from the... |
| US-3,979,545 |
Synthetic fiber impregnated with flame retardant compositions containing
halogen containing amides The flame resistance of synthetic fibers and solid polymers are improved by treatment with a halogen containing amide having the formula ##EQU1## wherein R... |
| US-3,979,544 |
Flock of synthetic fibers for electrostatic flocking Flock of synthetic fibers, especially of polyamide fibers, suitable for electrostatic flocking, and containing a certain amount of mineral tanning agents. |
| US-3,979,543 |
Article having a poly(arylene sulfide) coating and method of producing Addition of a siliceous material having a particle size of less than 10 microns to a poly(arylene sulfide) coating formulation yields a coating with improved... |
| US-3,979,542 |
Decorative procelain enamel surface and method for making A decorative porcelain enamel surface, preferably having the appearance of marble, is produced by first preparing the surface of an article, which may be... |
| US-3,979,541 |
Thin base self-tracking recording tape A self-tracking recording tape is disclosed. The invention is primarily directed to thin base magnetic recording tape. However, the concepts of this invention... |
| US-3,979,540 |
Ionomer resin substrates coated with an epoxy primer and finished with
an acrylic coating A coated flexible substrate of A. a layer of a foamed ionomer resin or a foamed polyolefin resin, B. a top layer of an ionomer resin that is firmly adhered to the foamed ... |
| US-3,979,539 |
Sheet molding compound A method and apparatus for making a sheet molding compound. A thickened uncured thermosetting resin mix is supplied as a thin coating to a sheet of plastic film... |
| US-3,979,538 |
Flocked web and method of producing same A flocked fabric is produced by coating a knitted or woven fabric with an acrylic resin emulsion foam which is then partially dried and collapsed by squeezing. A... |
| US-3,979,537 |
Insulating material and methods of manufacture An insulating material primarily for use on the interior of buildings and formed of a blanket of felted fibers (such as glass fibers) of relatively high density... |
| US-3,979,536 |
Zero degree belted tires, and high "soft stretch" belt-forming tapes
therefor The single-stage building of 0.degree. belted pneumatic tires completely in flat band form on standard building drums, is disclosed. The feasibility of the... |
| US-3,979,535 |
Process for the spray application of aqueous paints by controlling the
temperature of the air in the paint... The process is directed towards an improvement in the application of an aqueous paint to a substrate by air spraying the paint with a spray gun utilizing... |
| US-3,979,534 |
Protective coatings for dispersion strengthened nickel-chromium/alloys A method of forming a high temperature oxidation resistant coating on a thoria dispersion strengthened nickel-chromium alloy body is provided. The method... |
| US-3,979,533 |
.alpha.,.alpha.'-Bis-(phosphono)dicarboxylic acid derivatives Derivatives of dicarboxylic acids containing a phosphono group in the alpha and alpha prime position have been made. These have a wide variety of uses as... |
| US-3,979,532 |
Process for the manufacture of artificial leather and product made
thereby A process for the manufacture of artificial leather which has a napped, suede or nubuck surface finish by contacting a natural, synthetic of semi-synthetic... |
| US-3,979,531 |
Fluidized bed top surface stabilization mechanism A screen or plate is positioned above and adjacent the normal fluidized pulverulent material top surface level in a typical fluidized bed construction. The... |
| US-3,979,530 |
Polyester fiber-vacuum impregnated epoxy resin insulation system for
high voltage transformers A new insulation system, useful for the fabrication of high voltage transformers, capacitors and power supply encapsulation and insulation for high voltage... |
| US-3,979,529 |
Electrostatic application of thermoplastic adhesive Apparatus is provided for applying a well-defined strip of thermoplastic adhesive in powder form to a substrate. Powdered adhesive material is received from a... |
| US-3,979,528 |
Pressure fixation of coffee grinder gas The concentration of volatile organics that can be incorporated into a glyceride carrier is increased by the use of pressure in excess of 100 psia. Specifically... |
| US-3,979,527 |
Preparation of hop oil An improved method of making hop oil is described involving steam distilling the hop oil under vacuum at a temperature not exceeding 50.degree.C. The distillate... |
| US-3,979,526 |
Method of manufacturing whipping cream A method of preparing whipping cream comprising the steps of partially removing low molecular weight material from animal milk with a semipermeable membrane or a... |
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