Abstract: Methods of preparing Hybrid Silicate Binders are shown by admixing the following materials:1. a basic or acidic colloidal silica sol suspended in water or glycol ether;2. an organic silicate, such as ethyl silicate, hydrolyzed with water;3. a mineral acid of sufficient quantity to produce a final binder having a pH of 1 to 4; and4. the hybrid binder contains silica sol and organic silicates such that the ratio of weight contribution of SiO.sub.2 from organic compounds to weight contribution of SiO.sub.2 from colloidal silica sol is in the range between 0.09 to .9, in the final binder.That is, ##EQU1## The final binder preferably contains about 18%-21% SiO.sub.2. If basic silica sol is used it must be added to a mixture of the other ingredients.The preferred binder has a shelf-life exceeding nine months, it can be chemically polymerized or air-set and provides high binder strength and refractoriness.

Abstract: Automatic molding apparatus to make flaskless molds from match plate patterns using sand and binder pre-mix and an activator or catalyst includes form boxes having open faces and double wall construction with a continuous chamber between the walls. The inner wall is vented to the chamber to provide a gas flow passage. The apparatus also includes manifolds which clamp over openings in the top and bottom walls for innoculation and pneumatic withdrawal of activating or catalytic-reacting gases such as hot air or carbon dioxide which are innoculated at an innoculation station into the mold box to decrease the hardening time of the sand. The open faces of the mold box are closed by hinge plates or cover plates each rotated by a rack and pinion. The plates are further secured during sand filling by spring-loaded arms bearing against tapered ribs on the hinge plates.

Abstract: A tachometer pulse generator is coupled to the shaft of an electric motor. The output of the pulse generator is gated into a pulse counter circuit during a first fixed time interval. During a second fixed time interval which follows the first fixed time interval, the motor is speeded up if the count attained by the counter in the preceeding first time interval is less than a preset number or is slowed down if the count is equal to or greater than the preset number. The first and second time intervals follow each other periodically, thereby alternately measuring the speed of the motor and correcting the same to approach a preset speed which is proportional to the preset number of the counter circuit. Two preset numbers can be employed, one corresponding to a lower speed correction threshold and the other corresponding to an upper speed correction threshold.

Abstract: The crank arm of a hinge lock mechanism acts as an over-center latch for a folding leg when the leg is in its extended position perpendicular to the table top and also in its retracted position parallel to the table top. The crank arm is pivotally connected at one end to a support plate on the bottom of the table and is pivotally linked to a support arm on the folding leg. When the crank arm is rotated downwardly, it moves the folding leg far enough away from an apron or abutment so that the leg can be manually swung from its extended position to its retracted position and vice versa. The crank arm is subsequently rotated back to its upper limit in either case to latch the leg in position. The hinge lock mechanism is entirely hidden from view by aprons when the table is upright.

Abstract: Two stiff discs are rotatably attached together in face-to-face contact, one of the discs having a ring of openings therein, and the other disc having a nipple positioned to engage and latch in the openings. An implement holder is attached to one of the discs and a strap is attached to the other disc for strapping the two discs and implement holder to a person's hand. By rotating the disc carrying the implement holder with respect to the other disc, and clamping it in the desired position, the implement holder can be oriented in the proper rotary position for use of a predetermined implement by the person. The implement can be a knife, fork, comb, tooth brush, or any other suitable implement. The discs can be strapped to the palm of the person's hand, to the back of the hand, or to the wrist.

Abstract: A fishing device for supporting a bait fish in a generally horizontal disposition includes a rigid wire shank connected to two bait spears, and a braided wire cable which is wrapped around and frictionally engaged with the shank portion and provided with a loop at one end of said shank portion for connection to a fishline and a hook at the other end which is embedded in the bait. When a fish is hooked, the cable is displaced from a first position parallel with the spears to a second position generally parallel with said shank portion to provide a taut line during fish retrieval.

Abstract: Apparatus for shaping sheet material such as metal foil includes co-operating rollers with teeth, between which the sheet material is fed. The teeth shape the sheet to form corrugations, and projections on the flanks of the teeth form patterns on the corrugations. In order to free the shaped sheet from the teeth, resilient material projects from the flanks of the teeth and urges the sheet away from the flanks after a shaping operation.The invention is intended for use in forming the secondary heat exchange surfaces in aluminium radiators.

Abstract: A conveying system for conveying cans from a can-making machine to a can-filling machine includes a first conveyor to supply cans from the can-making machine to the filling machine and a second conveyor or supplemental feed conveyor at right angles with a first conveyor to convey excess cans made by the can-making machine to a palletizing apparatus which includes pattern-forming means and a pallet elevator. When the flow of cans exceeds the requirements of the can-filling machine, the cans are diverted from the can-filling machine, patterned, and palletized in layers in the pallet elevator. When the can-making machine is not supplying the requirements of the can-filling machine, or the can-making machine is shut down, stored cans are depalletized and conveyed onto the first conveyor. If the making machine is operating slower than the requirements of the filling machine, the second conveyor provides a supplemental feed of cans to the first conveyor.