Abstract: The disclosed dual mode direct current power supply comprises an AC transformer, a pair of DC output terminals, and first and second rectifier-filter circuits connected in parallel between the transformer and such terminals; the first circuit comprising first rectifiers for producing first rectified pulses, a first capacitor adapted to be charged to the peak voltage of such pulses, and an electronic voltage regulator including a series transistor; the second rectifier-filter circuit including second rectifiers for producing second rectified pulses, a choke input filter including an inductance and a second capacitor adapted to be charged through the inductance to the average voltage of the second pulses, and a series diode; the regulator causing the transistor to be nonconductive at high DC output voltage and then conductive increasingly in response to decreasing output voltage whereby the first rectifier-filter circuit supplies an increasing share of the load current.

Abstract: A framework for a building or other hollow object utilizing a plurality of basic building elements which are interconnected together in which each of the elements is constructed of a sheet of bendable resilient material which has a substantially flat permanent set, and each sheet is provided with three pairs of equally spaced apertures for interconnecting the building elements, each pair of connection apertures defining an axis which extends between the connection apertures, and the axes between the three pairs of connecting apertures intersecting at angles of 60.degree. to form an equilateral triangle centrally of the sheet, the sheets being interconnected by pins extending through apertures to form a hollow body. Four embodiments are disclosed, one in which legs extend from the central triangle portion, and two embodiments in which a six-sided sheet forms the basic building element.

Abstract: A composition blending carbon with powdered chromium oxide in an alumina or aluminum silicate matrix, including silicon metal powder to inhibit carbon oxidation, is more advantageous in resisting molten iron and slags than refractories based on carbon or chrome additions not combined. The resultant refractory mixes are suitable for all conventional application methods.

Abstract: A composition blending carbon or graphite with powdered chromium oxide in a high alumina matrix, including silicon metal powder to inhibit carbon oxidation, is more advantageous in resisting molten iron and slags than refractories based on carbon or chrome additions not combined. The resultant refractory mixes are suitable for all conventional application methods.

Abstract: A stand is adapted to support a musical instrument, such as a guitar, in an upright manner and is adapted to be assembled or disassembled in a rapid and convenient manner. The stand includes a pair of spaced-apart upright L-shaped members inclined toward one another. The members include forwardly projecting spaced-apart foot portions for supporting the bottom portion of the musical instrument. Strut members extend between the L-shaped members to help rigidify them. A support device releasably attached to the upper portion of at least one of the L-shaped members supports the upper portion of the musical instrument. The support device is also adapted to support sheet music, and a foot rest is provided and swings between a horizontal use position for receiving and supporting the foot of the user during the playing of the musical instrument and a generally vertical position behind and out of the way of the musical instrument when it is resting on the stand.

Abstract: The invention relates to an improvement in an electrostatic coating apparatus comprising a booth, air flow means, conveyor means and a powder spray gun, wherein the improvement comprises an endless conveyor belt and gaseous projection means for redirecting particles of coating material falling toward the floor to the articles to be coated and electrostatic means for recharging the particles.

Abstract: The compounds 2-N-[1,1-hydrogen or C.sub.1 -C.sub.4 -alkyl-2(3,4-methylenedioxyphenyl)ethyl]amino-1-(3-alkoxy-carbonyl or hydroxymethyl-4-benzyloxyphenyl) ethanol compounds, and the process of making these compounds. There is also disclosed a process of making the compounds 2-N-[1,1-hydrogen or C.sub.1 -C.sub.4 -alkyl-2(3,4-methylenedioxyphenyl)ethyl]amino-1-(3-hydroxy-4-hydroxy)ethan ol.

Abstract: The furnace for burning wood or coal has a cabinet with a front wall and interconnected spaces between the inner and outer walls at the sides, top, bottom and rear. One of two outer walls have an inlet and outlet for flow of air to be heated. There are aligned flue openings in the upper portion of one of the sets of spaced walls. A grate and an ash pan below are mounted within a lower portion of the cabinet. The front wall has at least one opening closed in an airtight manner by one or two doors. A damper, having a pipe and plate pivotally mounted on the top of the pipe at its front end, is connected to a bimetallic thermostat above it. Both are mounted on the front of the furnace. The thermostat is mounted for movement to open the damper. The front wall of the cabinet or the door, when there is one door, separates the thermostat from the fire chamber within the cabinet above the grate.

Abstract: A magnetic information card encoding apparatus wherein the train of clock pulses used to synchronize the release of binary data from a storage register to a recorder head is generated by the motion of the card itself. Structural means forms a card receiving slot into which the card is manually inserted and removed. A rotatable carriage assembly consists of a drive shaft, photoelectric means responsive to rotation of the drive shaft for generating the clock pulse train, an idler wheel, and spring biasing means for urging the idler wheel against the drive shaft in a friction drive relationship. A second spring biasing means urges the carriage assembly to rotate such that the idler wheel frictionally engages the card so as to be driven thereby. A switch is actuated by the leading edge of the card to provide a signal defining the position of the card in the slot. The arrangement is such that the information card is erased on insertion and encoded on withdrawal.

Abstract: Refractory compositions containing alumina or aluminum silicate and a phosphate bonding agent can be improved by the addition of from 0.2 to 1.5 percent tetrasodium pyrophosphate (TSPP) in combination with bentonite. The TSPP minimizes the amount of bentonite required for good workability in aqueous formulations for ramming or hand applications, thereby miximizing density and minimizing water required for tempering, also extending the storage life of these refractories and maintaining a high percentage of initial workability over a period of several months.

Abstract: A seismonastic control apparatus has a ball mounted in a concavity for unobstructed movement into contact with a displaceable disc which actuates a two-mode control device on predetermined tilting or shock loading of the apparatus.To increase the kinetic energy of the ball and thus facilitate displacement of the disc, the seat is formed with a circular region at which the inclination of the seat to the central axis of the apparatus increases. As the ball crosses this region it is accelerated more rapidly because its path becomes more closely aligned with the resultant force acting on the ball.

Abstract: An assembly kit comprising primary, secondary and intermediate sub-frames of tubular material which are all telescopically connectable to each other for erecting demountable frame structures.Each primary sub-frame has two side members and two cross members connected to the side members at positions spaced from the ends of the side members by a fixed distance. Two pairs of legs, having a length equal to the fixed distance, project respectively from the junctions of the side members and the cross members to one side of the side members.Each secondary sub-frame has two "L"-shaped side members and two cross members connected, respectively to the junctions of the arms of the "L"-shaped side members and at positions spaced by said fixed distance from the free ends the long arms of the "L"-shaped side members. The "L"-shaped side members are of tubular material which is a sliding fit on the tubular material of each primary sub-frame and have short arms equal in length to the fixed distance.

Abstract: A process for preparing a compound of the formula ##STR1## wherein R and R.sup.1 independently are selected from hydrogen and C.sub.1 -C.sub.4 alkyl groups, which comprises catalytically hydrogenating a compound of formula ##STR2## wherein R and R.sup.1 are as defined above and X is halogen using platinum oxide as catalyst.

Abstract: A shock-responsive control apparatus has a seismic ball mounted in a seat formed in a cup-shaped member and surrounding the plunger of a switch.As the ball crosses a circular region, at which the inclination of the seat to the central axis of the apparatus increases, its path becomes more closely aligned with the resultant force acting on the apparatus and the ball is accelerated more rapidly out of obstructing engagement with the plunger.Sensitivity is controlled by moving the seat relative to the plunger by means of a screw-threaded mounted cover for the cup-shaped member.

Abstract: A plastic refractory lining composition which can be applied by hand or trowel to refractory or bare metal surfaces and is particularly resistant to slag and hot metal erosion and to metal skulling is comprised of a blend of high alumina or aluminum silicate coarse aggregates with a fine matrix of calcined alumina, carbon, and bentonite employing a phosphate binder and tetrasodium pyrophosphate for modification and stabilization of plasticity characteristics. Finely divided silicon metal can be included to impart oxidation resistance to the carbon. This refractory is sufficiently "sticky" for ease of building a lining.

Abstract: It has been found that a sulphur containing resin which is the condensation product of (i) one or more mercaptoaldehydes and (ii) one or more meta-substituted phenols has good antioxidant properties. Mixtures of m/p-alkylphenols are used to particular advantage in the production of this resin. A small amount of the resin retards the oxidation of rubbers or polyolefins and the resin is particularly useful as a melt stabilizer during the extrusion of a polymer.

Abstract: A flexible resilient magnetic particle type information card capable of correctly reading information thereon after such card has been bent double on itself and creased, said card comprising a flexible base, a layer of uniformly distributed magnetic particles thereon, and a flexible overlayer of nonmagnetic material, said over layer having a thickness of at least 2 mils, said layer of magnetic particles being magnetically encoded, the magnetic flux transitions of such encoding being at least 0.02 inch apart and said magnetic particle layer being enclosed between the base layer and over layer and spaced from the edges of the card.A method of storing information in binary data form comprising magnetically recording information on a magnetic strip that has an over layer of at least 2 mils by inducing transitions in the magnetization of the strip at a minimum spacing of 0.02 - 0.1 inch.