Abstract: An article vendor, particularly for food products such as sandwiches, salads, lunch platters and dessert items, wherein the articles are stocked on endless belt conveyors extending in rear-to-front direction in a cabinet having a front window for merchandising display of the articles. The conveyors are arranged in tiers one above another and side by side in each tier, and the vendor includes an elevator movable up and down at the front of the conveyors for receiving an article from any one (or more) of the conveyors and transporting it to a delivery station. Upon selection by a purchaser of an article on a particular conveyor, the elevator is raised to the level of the tier which includes the selected conveyor, and that conveyor is indexed forward one step to dispense the forward article therefrom on to the elevator, after which the elevator is lowered to the delivery station.

Abstract: Certain 1-(3,5-disubstituted-2,4,6-triiodophenyl)-3-(polyhydroxy-alkyl)urea compounds are useful as x-ray contrast agents. Representative of this class of compounds is the compound 3-[3-(N,N-dimethylcarbamyl)-2,4,6-triiodo-5-(N-methylcarbamyl)phenyl]-1-me thyl-1-(D-gluco-2,3,4,5,6-pentahydroxyhexyl)urea.

Abstract: Apparatus for washing contaminated laboratory containers such as test tubes, flasks and the like. A tube, one end of which is connected to a source of negative pressure and the other end of which is inserted into a contaminated container, has a length sufficient to reach the bottom of the container to remove by aspiration material therein. A pump is connected to a source of washing material and, when actuated, delivers washing material into the container. Actuation of the pump interrupts aspiration during delivery of washing material. The washing material thus delivered to the container and contaminants are withdrawn by aspiration from the container after the pump is deactuated.

Abstract: Methods of manufacturing pants from heat-settable textile material, with molding of the material for a good fit, in which two flat tubes of such material are assembled, seamed to form a crotch seam, applied to a mold shaped to impart appropriate form to the tubes for a better fit, and heated to set the tubes in the form of the mold; and the molds used in carrying out said methods. According to a first embodiment, the material in the crotch section of the tubes is left intact until after molding, being then cut out. According to a second embodiment, the material in the crotch section of the tubes is cut out before molding.

Abstract: A process of recovery of lead from a lead sulfide concentrate. In this process, a furnace charge is prepared comprising the lead concentrate, a source of elemental iron and a source of available oxygen capable of reacting with the sulfur of the concentrate to form an oxysulfide matte. The relative proportions of the concentrate, source of elemental iron and source of oxygen are such that the sum of the elemental iron content and sulfur-reducible iron content of the charge is at least about 1.1 pound atoms per pound atom of sulfur based on the total sulfur content of the charge, and the oxygen source provides between about 0.25 and about 0.5 pound atoms available oxygen per pound atom of sulfur based on the total sulfur content of the charge. The charge is heated to a temperature of at least about 1,050.degree. C. and maintained at such temperature to effect reduction of lead sulfide with elemental iron, while limiting access of air to the charge to substantially prevent formation of sulfur dioxide therein.

Abstract: A method of positioning and supporting a large industrial machine or other object on its foundation comprising placing hydraulic jacking units between the machine and the foundation, pressurizing the jacking units to move the object relative to the foundation to a selected position, maintaining the liquid in the jacking units under pressure so as to support the machine in its selected position, and pouring a hardenable grouting mixture around the jacking units to fix them in their selected positions.

Abstract: A container having a high mechanical service strength and shatter resistance comprises a glass container body and an overlying containment coating constituted by a plastic film. The mechanical properties of the film are such that, when subjected to tensile testing at a film extension rate of 10 in./min., the film exhibits a tensile strength of at least about 300 lbs./sq. in., an elongation of at least about 80%, and a modulus of elasticity in tension of not more than about 1,000 lbs./sq. in. throughout the course of the extension of the film.

Abstract: A rotary cutting tool having a shank and a head at one end of the shank, the head having a flat bed portion. A clamp for carrying a bit is mounted for rotation on the bed portion for angular adjustment of the bit relative to the bed portion. This clamp has a groove in one of its faces, the bit being axially slidable therein to different extended positions, and the groove has a depth less than the thickness of the bit such that the bit projects laterally from the groove for engagement with the bed portion. As the clamp is drawn toward the bed portion, the bit is clamped in the groove against the bed portion in any predetermined adjusted angular and extended position.

Abstract: A solar collector comprising a trough, a solar radiation transmitting cover overlying the trough with one end of the trough constituting an inlet end, with the other end of the trough constituting an outlet end, and with air flowing through the trough from the inlet to the outlet end thereof generally along the longitudinal axis of the trough, and a plurality of solar radiation absorption panels disposed within the trough for absorbing solar radiation transmitted through the cover and for heating the air flowing through the trough. The solar radiation absorption panels extend transversely across the trough and are inclined relative to the longitudinal axis of the trough.

Abstract: An air chuck molded of synthetic resin material having a body with bores therein for the flow of air through the body. A check valve is provided in one of the bores and an end cap is threaded into this one bore to maintain the check valve in its desired position within the bore. This one bore has internal threads therein recessed from the outer end of the air chuck body so that, with the cap threaded into the bore, the cap is flush with or somewhat recessed into the bore whereby the internal threads in the air chuck body are protected from damage.

Abstract: An air-meltable castable alloy, resistant to corrosion by sulfuric acid over a wide range of acid strengths and degrees of contamination. As essential constituents, the alloy contains between about 34.10 and about 39.33% by weight nickel, between about 12.50 and about 14.29% by weight chromium, between about 5.90 and about 17.89% by weight molybdenum, between about 2.90 and about 5.67% by weight copper, between about 0.10 and about 1.25% by weight silicon, between about 0.003 and about 0.15% by weight carbon, and between about 22 and about 29% by weight iron. It may also contain up to about 3.0% by weight manganese, up to about 9.80% by weight tungsten, up to about 4.68% by weight tantalum, and up to about 3.00% by weight niobium.

Abstract: Apparatus for protecting a fluid pressure system from over-pressure, comprising a dome-shaped, reverse acting rupture disk adapted to be installed in an outlet of the fluid pressure system with its convex face resisting the system pressure, the reverse acting rupture disk being adapted to abruptly snap over center when subjected to a pre-determined pressure level, and a knife blade assembly disposed adjacent the back or concave face of the reverse acting rupture disk for cutting it as it snaps over center. The apparatus further includes a dome-shaped, prebulged rupture disk separated from the reverse acting rupture disk by a spacer ring, the prebulged disk having its concave face toward the reverse acting rupture disk whereby the prebulged disk entraps any fluid that may leak past the reverse acting rupture disk and will reliably burst when its concave face is subjected to the system fluid pressure upon the rupture of the reverse acting rupture disk.

Abstract: Apparatus for dispensing fabric from a bolt in which the bolt is cradled in a loop of an endless belt and unwound by driving the belt. The length of fabric unwound is accurately measured by measuring the distance of belt travel, and provision is made for presetting the length of fabric to be unwound, manually starting the belt to unwind the fabric, automatically starting measurement of the length unwound when the leading end of the fabric passes a predetermined point, and automatically stopping the belt when the preset length has been measured. The fabric unwound from the belt is automatically folded, and presented for being cut.

Abstract: Apparatus for fabricating flat floor trusses or other wood structures, the apparatus including a number of wood member support frames securable together in end-to-end abutting relation with each of the frames having a tongue at one end thereof and a groove at the other end thereof whereby the groove of one of the frames receives the tongue of another of the frames to facilitate rapid set-up of the frames with the frames in proper alignment with one another. Lumber stops are provided on support frames for accurately positioning the chord members of the truss and for preventing outward movement thereof, but yet permitting a completed truss to be readily lifted from the support frames without unclamping or releasing the stops and without undue friction from the stops. The support frames further include a plurality of wood member support platforms adjustably movable along the length of the support or readily removable therefrom so as to support the wood members at the joints of the truss being formed.

Abstract: Apparatus for extruding tubular plastic netting including concentric, counterrotatable inner and outer dies mounted in a housing with a space therein for the downward flow of molten plastic to a circular series of holes in each of the dies leading to their respective extrusion orifices, the apparatus having means for splitting the downward flow of plastic into two separate streams, one for the extrusion orifices of the inner die and the other for the extrusion orifices of the outer die, this means being formed substantially to equalize the rate of flow of the plastic to the extrusion orifices. The apparatus is also shown as including a seal arrangement in which a first and a second set of wedge seals protect bearings journalling one of the dies in the housing from the plastic, with the provision of a vent between the sets of seals so as to prevent application of pressure to the second set of seals in the vent the first set leaks.

Abstract: A door for a doorway in a mine stopping having latch means adapted to yield to maintain the door latched on heaving of the sill of the doorway.

Abstract: A four-section rise-over sofa bed fixture having a head section, a body section, an intermediate section and a foot section all pivotally connected together in end-to-end relationship and adapted to be folded from an extended coplanar position to a retracted position within a sofa. The fixture has at each side thereof a support to be mounted on the base of the sofa at the respective side thereof, a locking mechanism for locking the foot section in its retracted position, linkage interconnecting the support and the locking mechanism, and folding legs for supporting the body, intermediate and foot sections.

Abstract: A dough frame comprising in combination a discoid bottom plate; a first member removable thin sheet of plastic material sufficient in size to be mounted smoothly over and folded under said discoid plate; an annular rim element, having a rim height greater than the thickness of said discoid plate, the latter covered by said first member plastic sheet, and said rim element having a diameter adjusting means and supporting means cooperates with the said discoid plate covered with said first member plastic sheet to form a cavity or mold for accepting a pie dough mixture; a second member thin sheet of plastic material sufficient in size to enclose said dough within said cavity and to provide an interface between the said dough and a rolling pin and between the upper edges of the said rim element surrounding the said dough and a rolling pin.

Abstract: A system of and appurtenances for erecting formwork for pouring a slab in place on steel joists, wherein form supports are removably mounted extending transversely of the joists through the webs of the joists underneath the top chords of the joists, and forms are removably mounted on the supports.

Abstract: A vehicular propulsion system comprising an electric drive motor and a source of electric power for energizing the motor drive. The power source comprises at least one fuel cell and at least one primary air cell. The air cell has a consumable replaceable anode and produces hydrogen as a product of the discharge reaction thereof. The fuel cell produces electrical energy when supplied with hydrogen. The hydrogen so produced by the primary cell is transmitted to the fuel cell. A switching arrangement is provided to alternately and selectively interconnect the fuel cell and primary air cell to the motor drive. The switching arrangement is responsive to the power output of the fuel cell whereby upon the power drain of the motor drive exceeding that available from the fuel cell, power will be supplied from the primary air cell.