Abstract: A heat exchange unit for delivery of moulding sand in foundries. The sand is heated or cooled, as desired, by contact in its fluidized state with a heat exchange surface. The delivery temperature may be thermostatically controlled. The unit is capable of intermittent delivery, fluidization ceasing when delivery ceases so that the sand in direct contact with the heat exchange surface insulates the bulk of the sand therefrom. Delivery temperature on recommencement is therefore substantially the same as before cessation. By-pass means may be provided to ensure delivery of sand in the event of malfunction of the unit or during maintenance.

Abstract: A heat conserver for bell-type ovens, which latter comprehends a housing which is closed at its sides and top and open at its bottom with heating elements as of the infrared emitter-type located adjacent the lower end. One form of the conserver consists of a frame having heat reflective surfaces for confronting relationship to the heating elements when the oven is in raised or inoperative position for directing the radiated heat returningly thereon. Another form of the conserver is a flat plate for disposition closingly across the normally open lower end of the housing when the latter is in inoperative position. Both forms of the invention are adapted for vertical reciprocal movement.

Abstract: A separator for immiscible, emotionless-forming liquids having different specific gravities which comprises a container and a valve arrangement provided in the lower end of the vessel for movement between open and closed conditions whereby through disposition in the container, the heavier liquid may be discharged from the separator, the lighter liquid being retained therein. The valve configuration is such as to greatly facilitate its disassembly in cleaning as well as economic manufacture.

Abstract: A device for controlling and regulating the amount of product to be poured into the moulds of forming machines for chocolate and similar products, in which the conveyor belt carrying the filled moulds is fitted with a balance for weighing each single filled mould and for comparing the effective weight of the filled mould with a preset rated weight, the said balance being connected with a regulation mechanism for increasing or decreasing the quantity of chocolate or similar to be poured.

Abstract: A carburetor which comprises a casing, an air inlet at the upper end thereof and an air-fuel mixture discharge at the lower end thereof, with a venturi throat located downwardly of said inlet, a sonic throat below said venturi throat, and a diffuser section interconnecting the sonic throat and the discharge. Portions of the wall of the sonic throat are provided with a plurality of indentations, projections, or surface irregularities for stabilizing the flow therethrough and conducing to the uniformity of the air-fuel mixture. At least one portion of said sonic throat is movable with respect to the fixed portions of said throat for altering the cross-section thereof responsive to fuel requirements for combustion. One form of the invention embodies a plug vertically shiftable by a control shaft, having a fuel chamber with emission ports to the interior of the casing whereby said plug acts as an accelerator pump.

Abstract: A score keeping method for the game of bowling including a score keeping sheet for use by one of the players, an open switch for control of the pin setting machine by the other player, and a counter mounted on the ball return chute to count each time a bowling ball is returned to the players.

Abstract: In combination with a conveyor having spaced apart chain sections, at least one transversely aligned pair of support elements projecting toward each other from the respective chain section, a clamping member slideably engaged on each support element for reciprocal movement axially thereof and with the chain-remote portions of said clamping members being spaced from each other, resilient elements urging said clamping members toward each other, and a pouring die for removable disposition between said clamping members substantially intermediate said chain sections; the pouring die having integral cooperating components for detachable coupling engagement with said clamping members.

Abstract: An apparatus for the collecting and transferring confectionery products onto a receiving conveyor feeding a wrapping machine, in which above a feeding conveyor belt carrying the dies provided with the products there is arranged a transfer conveyor equipped with prehensile elements for removing the products from the dies, this conveyor cooperating with a further transfer conveyor also fitted with prehensile elements for taking up the confectionery products from the first transfer conveyor and depositing them as required on the receiving conveyor.

Abstract: A solar heating unit for disposition exteriorly of a building window for heating the air within the space interiorly of the window embodying a casing with a transverse divider for creating a rear passage and a front passage which are in communication in their lower portions. The upper end of the rear passage connects with the forward end of a rearwardly extending lower duct having a cool air inlet at the rearward end thereof. The upper end of the front passage connects with the forward end of an upper duct progressing rearwardly above the lower duct and with there being a warm air outlet at the rearward extremity thereof. A heat exchanger is disposed within the front passage for impingement thereon of solar radiation passing through a transparent panel defining the front of said casing. A thermal responsive closure is provided at the upper end of said front passage for closing same when the temperature within the front passage has descended to a predetermined level.

Abstract: This invention relates to a bending unit for a bending-glueing machine for bending the rear edge of a dinked workpiece advancing in rectangular direction.

Abstract: A shoe adapted for facile interchangeability into a multiplicity of styles comprising an outsole having a heel portion, with there being an intervening zone of flexure therebetween. Forward and rearward inner soles are provided on said outsole and with their adjacent end portions in overlapping relationship for relative slidability during foot movement. A retaining strap extending lengthwise of the shoe serves to optionally maintain a rear upper in operative position as well as to promote integration of the shoe components in selected mode of wear. A readily widthwise adjustable front upper or vamp is detachably mounted upon the forward portion of said outsole and replaceable by a thong detachable to the forward portion of the sole.

Abstract: A method for embedding a reinforcing element within a molded thermoplastic body and a device for accomplishing said method which comprises a single extrusion head, having a duct for feeding thermoplastic material to a sizing run. The axis of the duct is at an acute angle to the axis of the sizing run and the said sizing run communicates in its portion opening into said duct with a co-axial chamber through which a reinforcing element is fed to said sizing run. The cross-section of the sizing run is greater than that of the chamber whereby the reinforcing element will be located intermediate the opposed sides of said sizing run.

Abstract: A solar energy collector having lower and top plates in spaced-apart parallel relationship and being laterally joined to develop a chamber, fluid inlet means provided at the normally upper end of said chamber, fluid outlet means provided at the normally lower end of said chamber, said lower plate having high heat absorptivity, said upper plate having heat transmissivity for short wave energy, a multiplicity of insulators provided within said chamber developing a multiplicity of tortuous flow paths from one end of said collector to the other, and means interengaging the upper and lower plates and the intervening insulators along lines of demarcation coextensive with said collector for developing discrete flow channels.