Abstract: A lightweight aggregate for use in concrete mixes with Portland cement consists essentially of bottom ash produced as a by-product of burning pulverized coal in a dry-bottom furnace. The ash is sized to remove particles substantially exceeding 3/8 inch in diameter. It is substantially free of iron pyrites and sulfur trioxide to provide a lightweight aggregate which is inert, non-reactive, and meets the requirements for such aggregate as defined in ASTM specifications C-330, C-331 and C-332. Methods of producing this aggregate material are disclosed, including a method for recovering the same from the waste product ash in a power plant sluicing pond. Concrete mixes and products are disclosed in which such ash consists of the lightweight aggregate.
Abstract: A method for promoting the photooxidative destruction of organic waste pollutants by use of gelled metal alginate particles which have been stained with a dye sensitizer. The stained particles are both recoverable and biodegradable. They are effective in promoting the photooxidation of organic wastes including toxic phenol compounds in the presence of visible light and atmospheric oxygen.
Abstract: A self-latching relay is connected in series with the ignition circuit of a power boat to interrupt power to the starter and ignition circuits until the relay is actuated. A thermal delay timer is connected to one of the control switches for the bilge blower system to time a predetermined interval after the bilge blower has been turned on. After the interval has been timed the ignition circuit is completed through the self-latching relay. An emergency override circuit is provided to bypass the timer, but includes warning means which continue in operation until the engine is stopped and restarted without the aid of the emergency override switch.
Abstract: Composite coatings are formed of a ceramic-type material such as chromium carbide over an intermediate layer of a ductile metal such as nickel on stainless steel turbine compressor blades. Such coatings were found to reduce the erosion by entrained particles to less than 10 percent that experienced by uncoated blades.
November 12, 1974
Date of Patent:
April 20, 1976
Aerospace Materials Inc.
John E. Gates, Neil D. Veigel, Melvin F. Browning
Abstract: A modular buzzer device which includes a striker arm, a diaphragm, and electromagnetic means for oscillating the striker arm. The device is housed in a container with a shape and size corresponding to a common electronic component configuration. The diaphragm is molded onto the housing and forms the top wall thereof. The striker arm is welded to one leg of an iron core used in oscillating the striker arm.
Abstract: A bicycle with a disc brake includes a brake mounting bracket attached to the bicycle frame and restrained against movement about the axle of the wheel with which the brake is associated during braking action. The brake pads are mounted on an actuator and the actuator is supported by a carrier. The carrier and the mounting bracket are interconnected by a loose connection that permits floating movement of the carrier, actuator and brake pads with respect to the mounting bracket and brake disc to accomodate distortion of the brake disc, assembly tolerances and mispositioning of the brake pads with respect to the disc.
Abstract: A paper fiber treatment system utilizes a screw revolving in a perforated cylinder as a tailings screen in place of conventional vibratory or other screens to separate undefibered fibrous materials or other undesirable solids from the free fibers. The tailings screen may be used, for example, in an otherwise conventional fiber treatment system to screen paper stock, downstream from a pulper for pulping waste paper or refuse containing a high percentage of paper fibers, or downstream of a digester for separating knots or other undefibered wood particles from the cooked fibers ejected from the digester.
April 29, 1974
Date of Patent:
March 30, 1976
The Black Clawson Company
David E. Chupka, Donald F. Lehman, Gilbert E. Kohr
Abstract: Mixed solid waste, such particularly as municipal waste, is subjected to a pulping action which results in fragmenting the glass and metal constitutes into particles of similar size, with the cast and foil aluminum being converted into the form of chunks and pellets respectively while the aluminum which is present as alloy, such as is used in cans and other food containers, is cut into flake-like particles, after which the mixed particles are dried and then subjected to agitation causing the flakes of aluminum to be concentrated at the top of the mix for separate removal by skimming or scalping. The remaining mixture of glass, aluminum and other materials is then subjected to high tension electrostatic treatment effecting separation of the glass from the other materials.
Abstract: An electronic buzzer has a tuned oscillating striker and an electronic oscillator circuit matched to the striker tuned frequency and driving the striker by close coupling of a driving coil to a core member which forms part of an electromagnetic circuit with the striker. The oscillator circuit also includes a control coil in the transistor base circuit and mounted within the driving coil for close coupling to the driving coil and the electromagnetic circuit. The control coil is optimized to have the maximum number of turns while still matching the effective input impedance of the transistor. A diode may be connected in shunt with the driving coil for improved feedback coupling and frequency tuning.
Abstract: The split bolt comprises plural bolt segments having threaded outer surfaces which are brought radially together to render the bolt insertable into a complementary threaded recess, and spaced radially apart to cause the bolt threads to become engaged when an elongated, generally cylindrically shaped wedge member is inserted between the segments to space them into the threaded engagement. The wedge member has plural camming surfaces along the length thereof which engage corresponding camming surfaces on the inside surfaces of the bolt segments. Further, the bolt segments are interconnected by an elastic means which surrounds the segments and keeps them in surface contact with the wedge member inserted therebetween.
Abstract: A combined telephone and binary clock is disclosed in which light emitting diodes are formed in the telephone push buttons and are provided with a binary coded decimal display so that telephone push buttons provide an indication of time. The clock may be periodically preset by a signal transmitted over the telephone line. An alarm circuit is included to cause the telephone to ring at a predetermined or preselected time.
Abstract: A mouthwash solution and method for treating both the lower and upper throat. The aqueous solution contains dioctyl sodium sulfosuccinate as the active ingredient. The treatment of the lower throat involves holding a small amount of the solution in the mouth for a short period of time. The treatment for the upper throat area is to hold a small amount of the solution in the mouth, lie down with the head back, swallow several times, and hold the head in position for a short period of time.
Abstract: A web of bag blanks, a method of making the web, and apparatus and method for filling and sealing the bags in the web. The web is formed as a continuous tube having spaced, transverse seal lines extending from a lower edge of the web to a point short of the upper edge. The bags are filled and sealed on a machine having an elongated filling pipe which is threaded into the tube between its upper edge and the upper ends of the transverse seal lines. After the bags are filled, a continuous, longitudinal, seal line is formed, intersecting the upper ends of the spaced seal lines to seal the filled bags. The tube is then severed intermediate its upper edge and the continuous longitudinal seal line to separate the filled, sealed bags from the filling pipe.
Abstract: A fork lift with a retractable overhead guard has limit switches built into the mast and one rail of the retractable guard which prevent the fork lift from being raised above a predetermined height when the guard is lowered, and when the fork lift has been raised above the predetermined height with the guard raised, prevents the guard from being lowered.
Abstract: Disclosed is an improved switch particularly adapted to be used as a coaxial cable switch for cable television systems because of its superior isolation of the signal inputs. The switch comprises an electrically insulating body, first, second and third terminals located on the body in spaced relationship, a movably mounted contact, which is movable along a predetermined path to form alternative conductive paths between the first terminal and either of the second or third terminals, and a partition means between said terminals and located adjacent the path of the contact to form a barrier to radiated signals from whichever of the second and third terminals that is not in contact with the movable contact. Additionally, terminating means for the unused terminal and/or shielding means to further isolate the unused terminal from the used terminal can be provided.
Abstract: A tie rack designed to support both untied and pretied neckties which includes a base plate, posts received in sockets formed in the base plate and projecting from a front face thereof, wire loops disposed between the posts with the ends of the loops received in the sockets, and adjustable attaching brackets telescopically receiving opposite ends of the base plate. The spacing of the posts and the loops is such that untied neckties can be draped over all of the posts while all of the wire loops are occupied simultaneously by pretied neckties with the hooks thereof engaging the loops.
Abstract: A trash compactor is provided with manual controls for causing a compacting cycle and additional clock timer operated controls which can operate the compactor ram through a cycle with an extended delay period after a compacting stroke at some time of day when the compactor is unlikely to be in use for a substantial length of time.
Abstract: The unwind controller drum for metering web material into a web processing machine is positively driven by a positive, fixed-ratio drive train. Several drive ratios are selectively available, each differing only slightly from another to provide minute changes in the drive ratio from the drive to the unwind drum. The changes in drive speed are generally less than .05% to provide positively determined, finite adjustment of the rate that the web material is metered into the web processing equipment.
Abstract: In a trash compactor which includes a ram for compacting waste materials deposited in the compactor, a two-piece, reusable liner is positioned within the compactor to receive the waste material and facilitate removal of the waste material after compaction thereof. Each of the sections is formed of a fairly rigid material, such as polyethylene, and each is provided on its outer surfaces with ribs which serve to both strengthen the liner sections and prevent the liner from sticking to the interior surfaces of the drawer. Each of these sections is constructed of intergrally formed, upstanding sidewalls and a bottom wall with one side wall of each of the sections being just high enough to retain liquids within the liner while permitting their ready assembly and disassembly.
Abstract: Jumper cables or battery charging cables for automotive use and the like are disclosed in which at least one of the cable's gripper jaws or clamps is provided with a length of coiled heater-resistance wire. The length of wire is clamped to the portion of the jaw handle opposite that to which the jumper cable wire itself is connected, and extends a short distance outwardly of the handle. The coiled heater-resistance wire is chosen as to have a preferred resistance in the order of 0.5 to 2 ohms and has an exposed free end which may be contacted to the battery terminal prior to connecting the gripper jaws to the terminal to indicate whether the charger cables have been correctly or incorrectly connected. If the connection is incorrect, the resistance wire will sparkle visibly and safely at the point of contact with the terminal, thus indicating the the connection is wrong. If no visible sparkle is seen then the charger cables may be clamped with the knowledge that the connection is correct and safe.