Abstract: In a connector, as used to interconnect structural members in a trusswork, an elbow and a pipe, which may be another elbow, are provided with suitable slots receiving a plate, and the elbow, pipe, and plate are welded together.

Abstract: In known processes and known apparatus for mechanical separation of a combination of meat and bone into useful fractions, the combination is conveyed as by a screw through a screen, which constitutes a portion of an elongated cylindrical conduit, and softer components are expressed through the screen, while harder components are contained by the screen.

Abstract: An adjusting and tuning arrangement is provided in a microwave oven to adjust the energy distribution to various areas of the oven cavity such as defined areas or the area of a sensor assembly on a tray inserted in the oven and also to balance the distribution of energy between the load articles on the tray and the sensor assembly or between various load articles. Two electrically conductive planar elements are positioned inside and project into the cavity to accomplish the tuning. The planar elements are arranged one above the other at predetermined angular orientations and are also each independently rotatable about one edge.

Abstract: A colloidal dispersion of hydrous antimony pentoxide particles is made by a process which comprises introducing particles of an oxidizable antimony oxide into a polar organic solvent selected from the group consisting of formamide, methylformamide, dimethyl formamide, acetamide, methylacetamide, dimethylacetamide, dimethyl sulfoxide, formic acid, tetramethyl urea, methanol and ethanol, and contacting said particles with aqueous hydrogen peroxide in the presence of an aliphatic alpha-hydroxy carboxylic acid and a halogen acid selected from the group consisting of hydrogen chloride and hydrogen bromide, at a temperature of from about 0.degree. C to about the decomposition temperature of the reaction mixture for a length of time sufficient to convert at least a portion of said particles to colloidal particles of hydrous antimony pentoxide.

Abstract: A manually operated blow gun for cleaning work pieces by use of compressed air which includes a back pressure sensitive control that is effective when the gun is dead ended with the trigger depressed. The gun has a trigger operated valve which causes actuation of a main output valve, wherein when back pressure is increased, the pressure is directed via a by-pass conduit to close the main output valve against the action of the trigger operated valve.

Abstract: A colloidal dispersion of hydrous antimony pentoxide particles is made by a process which comprises introducing particles of an oxidizable antimony oxide into an aliphatic polyhydroxy alcohol having vicinal hydroxyl groups and contacting said particles with aqueous hydrogen peroxide at a temperature of from about 0.degree. C to about the decomposition temperature of the reaction mixture for a length of time sufficient to convert at least a portion of said particles to colloidal particles of hydrous antimony pentoxide.

Abstract: A double-sigmoid connector is used to interconnect structural members in a trusswork and comprises a pair of arcuate elbows joined to each other at their outer peripheral midsections. Coaxial outlets are formed in the elbows at their inner peripheral midsections.

Abstract: In a double-sigmoid connector, as used to interconnect structural members in a trusswork and comprises a pair of arcuate elbows joined to each other at their outer peripheral midsections, coaxial outlets are formed in the elbows at their inner peripheral midsections. Accordingly, lateral interconnections may be made.

Abstract: In a double-sigmoid connector, as used to interconnect structural members in a trusswork and comprises a pair of arcuate elbows joined to each other at their outer peripheral midsections, a pipe extends through an opening in the outer peripheral midsection of each elbow and is joined to each elbow so as to join the elbow to each other.

Abstract: A tray for use in an electromagnetic oven supplying differing quantities of electromagnetic energy to a variety of load items which are located within the oven cavity. A food or material bearing tray inserted into the oven positions a conductive energy shield to interfit with elements on the tray to isolate selected items from the electromagnetic energy. The conductive shield cooperates with a shaped interior wall of the oven to provide a desired non-uniform distribution of electromagnetic energy over those regions of the tray which are not shielded. An improved sensor assembly located on the tray controls an assembly in the oven to inhibit and terminate the heat cycle as desired. The tray further includes conductive base strips with upstanding flange members defining the shielded region with the base strips recessed into the surface of the tray to prevent energy from entering into this shielded area.

Abstract: A railway bolster is provided wherein the bolster bowl and king bolt openings have liners of low alloy or carbon steel backed by a weld metal deposit with a hardness of from about 25 to 40 Rockwell C the weld metal forming the wear element.

Abstract: A method and apparatus for inspecting the location and orientation of a sensor assembly in a tray-sensor arrangement adapted to be placed in a microwave oven. The sensor assembly which includes a ferromagnetic element that absorbs energy when placed in the oven and changes its characteristics when a predetermined amount of energy has been absorbed, is tested in the completely assembled tray by accurately positioning the tray in predetermined relation to an oscillating circuit whose operating frequency is responsive to the presence of the ferromagnetic sensing element. The output frequency of the oscillating circuit indicates whether or not the sensor assembly has been properly assembled and positioned on the tray. The oscillator circuit includes a frequency determining element which produces a distinctly different frequency when the sensor is not properly positioned in the assembly or is omitted from the assembly.

Abstract: An apparatus for mixing or blending, and discharging ground meat or the like. The apparatus includes a tub having a pair of spaced, agitator mounted, shafts which shafts are mounted therein for counter-rotation, with the agitators over-lapping, to mix and continuously circulate the meat and also to rapidly discharge same through a movable door when desired. Agitators are fixedly and specifically positioned on the shafts to achieve the desired objectives depending only upon the position of the discharge door for each function.

Abstract: A novel method in accordance with the present invention comprises the formation of compacted pellets of solid phase carbon dioxide from liquid phase carbon dioxide to form snow, compressing said snow to force the same through an extrusion passageway forming elongated, rod-like extrusions of compacted solid phase carbon dioxide and exerting back pressure against the rod-like extrusion as they leave the passageways thereby stabilizing the extrusions permitting the escape of gas without fracturing the same.

Abstract: A colloidal dispersion of hydrous antimony pentoxide particles is made by a process which comprises introducing particles of antimony trioxide into a polar organic solvent selected from the group consisting of formamide, methylformamide, dimethyl formamide, acetamide, methylacetamide, dimethylacetamide, dimethyl sulfoxide, formic acid, tetramethyl urea, methanol and ethanol, and contacting said particles with aqueous hydrogen peroxide in the presence of an aliphatic alpha-hydroxy carboxylic acid and a halogen acid selected from the group consisting of hydrogen chloride, hydrogen bromide, and hydrogen iodide at a temperature of from about 0.degree. C to about the decomposition temperature of the reaction mixture for a length of time sufficient to convert at least a portion of the antimony particles to colloidal particles of hydrous antimony pentoxide.

Abstract: A seal is disclosed for a shaft journalled to rotate within a sleeve. The seal comprises annular members mounted between the shaft and the sleeve for relative movement along an axis common to the shaft and the sleeve. The members are biased into sealing engagement with each other and are separable by fluid pressure for relative rotation of the shaft and the sleeve with no surface-to-surface wear of the seal.

Abstract: A valve having separate closures for its inlet and its outlet respectively comprises a housing having the inlet in an elongated tubular wall and the outlet at an annular valve seat. A piston constituting one closure is movable coaxially within said wall so as to open and close the outlet. A sleeve constituting another closure is movable coaxially over the piston and within said wall so as to open and close the inlet. The piston and the sleeve are associated for interdependent movement.

Abstract: A method and apparatus is disclosed for controlling the temperature rise of a material placed in a microwave oven in which use is made of a correlation between the power delivered to the load and the residual field within the oven at a position spaced away from the load. By sensing the strength of the electromagnetic field, electronic circuitry is provided for evaluating the time required to achieve a given temperature rise of the material being heated.

Abstract: A control circuit is provided for a microwave oven in which a crystal rectifier is responsive to variations in the level of the electromagnetic field within the oven cavity when items of different energy absorption or reflection characteristics are placed in the oven. The electric current developed by the crystal is employed to generate a ramp type electrical signal which is compared with a fixed reference voltage to control the termination of microwave power to the oven. Compensation for the nonlinear relationship between crystal current and the level of the electromagnetic field within the oven is provided. In addition, compensation for the initial temperature of the food item which is placed in the oven is provided.

Abstract: The tendencies of ultraviolet light absorbers to exude from polyolefins are minimized by the use of amorphous, micro-sized silica.