Abstract: A vertical tube boiler having a plurality of vertical tubes which extend through a water tank and communicate with a combustion chamber and a chamber provided with a flue outlet, the tank being provided with a transverse plate located above the bottom or firing plate of the tank and provided with holes 20 through which the tubes extend with a clearance gap being provided between the periphery of each hole 20 and the outside of the associated tube, through which gaps water flows upwardly to create upward currents in the water within the tank to hold any scale removed from the outside of the tubes in suspension and if such scale drops to the bottom of the tank, then it accumulates on the plate and not on the firing plate thus preventing burning out of the firing plate.

Abstract: A horse shoe pad is formed of a shock absorbing layer and a stabilizing fabric layer. The shock absorbing layer may be made of a dense non-cellular polyurethane of essentially linear structure containing unsatisfied hydroxyl groups, having a compression set of less than 15%, and preferably less than 5%, an elongation at break of at least 500%, a recovery after compression which is delayed by about 0.7 seconds, and a hardness on the Shore 00 scale of approximately 70. The fabric reinforcing layer may be a woven nylon fabric. In addition to these two layers, some embodiments include an additional layer of stabilizing fabric on the opposite side of the shock absorbing layer and/or layers of polyester urethane forming base and/or top layers.

Abstract: An electro-mechanical direct drive valve servo system for an aircraft including a drive mechanism that couples the rotary output motion of a rotary force motor to linear motion at a sliding-type valve. The drive mechanism includes a pair of axially spaced rotary members connected to the force motor and a wobble member journaled between and canted by the rotary members with axial thrust bearings interposed between axially aligned opposed planar faces of the rotary and wobble members. A radial output arm on the wobble member is connected to the valve and is constrained for arcuate nutating movement whereby controlled rotation of the rotary member effects nutating movement of the wobble member and output arm which movement effects controlled linear movement of the valve. Additional control inputs such as braking and recentering function inputs are accommodated by the drive mechanism at its input end to take advantage of the mechanism's inherent gearing force ratio.

Abstract: The invention provides an apparatus and process to cast continuously high quality hollow round steel billets or tubes. The hollow round steel billets are produced by a compact, high production casting machine incorporating a rotating hypocycloidal mandrel for inside cooling and deformation of the solidified steel. The outside cooling is by traditional mold and spray cooling. The adjustable rolling movement of the mandrel controls the uniform heat extraction from the inner annulus as well as the deformation and deformation rate of the as-cast steel to increase the ductility. The inside of the hollow round billet so formed is substantially round and the inside surface is smooth to facilitate high quality and further processing to finished pipes in conventional high production machinery.

Abstract: A method of making a planar fork contact initially having plural tines with respective coplanar surfaces and gold inlay material integral with such coplanar surfaces, to bring them into substantially confronting relation with each other within the plane of the contact. Other steps include setting the twist to maintain such inlay containing areas in such confronting relation, controlling such twisting and the location of the respective twists for contact uniformity, and using cut-away tabs on the tines to facilitate twisting. The invention also relates to an apparatus for making such planar fork contacts, especially by utilizing the method of the invention.

Abstract: An apparatus for wiping lenses or the like to clean them includes a wiping means for wiping a lens and a support means for supporting the wiping means in operative relation. Adhesive means may be used to attach the wiping means to the support means. Respective support means may be connected by a force fit frictional engagement of a protruding member in a receptacle associated with respective support means. A pair of support means may have respective heads for holding respective wiping means in operative relation; one of the heads may be concave and the other convex with respect to a plane therebetween. Moreover, means to facilitate manual grasping of the apparatus for convenient use also may be provided as part of the support means. A cleaning material or the like may be provided in the wiping material.

Abstract: The present invention is an electrical clip-like connector that has a low profile and is capable of connecting the conductors of an electrical cable, for example, with the leads of an integrated circuit package or the like. Due to the low profile configuration of the invention, it may be used in situ in confined environments, and it also may be used for coupling relatively high speed signals without or with minimum antenna effect. Other features of the invention include a locating mechanism that facilitates applying the clip connector to an integrated circuit assuring proper alignment of the contacts and leads and a preferred contact/support arrangement to help assure good electrical connection with the integrated circuit leads and tolerance for size and location errors while avoiding overstress damage to the contacts.

Abstract: A zone control apparatus for central heating and/or cooling systems having a central fluid heating and/or cooling plant and conduits for directing the heated or cooled fluid to the rooms in a house or other building being serviced by the system. The zone control apparatus comprises one or more flow control devices operatively associated with respective fluid conduits in the central heating and/or cooling system, and a cycle controller for cycling the flow control device or devices between high and low (or no) flow conditions at times strategically selected to correspond to periods of high and low use of the room or rooms with which the flow control devices are respectively associated. Accordingly, the apparatus operates automatically to eliminate unnecessary heating or cooling of individual rooms or zones during cyclical periods of low or no use whereby substantial energy savings and other benefits may be obtained with minimal compromise in comfort.

Abstract: Tool includes a plurality of circumferentially spaced radially extending guideways in an end face thereof for receipt of a corresponding number of cutting tool holders. The radial inner ends of the holders have cam followers thereon which are urged radially inwardly by spring members into engagement with one or more correspondingly tapered cam surfaces on a central pusher element. The pusher element is supported for axial movement within a longitudinal bore in the cutting tool and is precisely axially movable in opposite directions to cause precise radial inward and outward movement of the tool holders within such guideways.

Abstract: Insulated cabinets with interchangeable heat transfer units disposed on the top thereof are disclosed and means for improving the air circulation both in the heat transfer units and within the enclosed cabinet. The heat transfer units may be refrigeration type units, freezer type units, heating type units, warming type units or proofing units. Each of the heat transfer units includes a rectangular opening in the bottom thereof to which is attached a duct through which heated or cooled air is forced. The duct has parallel front and rear walls and inclined side walls which taper to reduce the cross section of the air flow. The duct is a sliding fit inside a tunnel which extends vertically along the back wall of the cabinet. The tunnel is provided with two columns of louvers along its entire length through which the air from the duct flows. Air exiting the louvers is deflected by a baffle plate which extends the full width of the rear of the cabinet. The edge portions of the baffle plate are perforated.

Abstract: A power line filter comprises a filter circuit in the form of an impedor assembly (30) that filters a network supply voltage to be applied to a load. A voltage sensor means (34) monitors a characteristic of the supply that is representative of the interference content of the supply voltage. A microprocessor (36) compares the monitored characteristic with data that is stored in a memory (38) and is representative of a desired supply characteristic. By way of control means (32), the microprocessor (36) cause variation of a filtration characteristic of the impedor assembly (30) in a sense to minimize any divergence between the two above-mentioned characteristics, thereby to better suppress the interference.

Abstract: Apparatus for recovery and reuse of parts cleaning fluid or similar fluid such as oil upon separation and removal from water, including a tank for receiving and collecting the water and fluid which floats atop the water. A removable shelf may be slidably mounted in the upper part of the tank for directing the fluid flow to the rear of the tank for channeled passage to a sludge collector. A box-like housing having a water discharge chamber partitioned by a plate-like baffle into water entry and outlet compartments which open to the upper part of the chamber that is vented to atmospheric pressure may be mounted in the lower part of the tank by associated fluid drain fittings. The outlet compartment has a drain whereas the water entry compartment has a relatively small inlet closely adjacent the bottom of the tank so that only water will flow into the water discharge chamber for automatic discharge from the tank upon the level thereof exceeding the height of the baffle.

Abstract: An extruder system includes a barrel surrounded by a jacket defining a plurality of zones. Other zones may be in the feed screw and downstream processes. A temperature control unit has a hot water circuit and a cold water circuit each with supply and return manifolds and valves which allow connection of each of the zones to receive either hot or cold water. Each circuit has a single heat exchanger which is used to heat or cool all the water circulating in the respective circuit. The two circuits may be interconnected by a heat pump so that waste heat from the cooling circuit is used by the heating circuit. In this case the heat exchangers become auxiliary. The system permits optimum energy reuse from heated areas to cooled areas, or vice versa, and minimizes additional energy requirements.

Abstract: An insole includes an abrasion-resistant fabric top covering adhered to a layer of molded modified dense polyurethane contoured to provide maximum shock absorption under those areas of the foot most subject to impact loading and a minimum thickness of polyurethane under the remaining portions of the foot. In addition, a series of grooves extending primarily parallel to the axis of the foot are formed in the lowermost surface of the shock absorbing polyurethane. These grooves provide volume into which the polyurethane may deform during impact, thereby enhancing the shock absorbing qualities of the material.

Abstract: A method for the gunning of refractories characterized in that a refractory mixture consisting of a refractory aggregate and a binder is mixed in a nozzle with water, and thereafter the admixture is injected toward the working surface, while said nozzle is slidable and rotatable in the range from the vertical to 45.degree. at the angle to the working surface and further it is turnable by 360.degree. to the axis passing its fulcrum.

Abstract: Anti-rotation device consists of a thin washer having a pair of circumferentially and radially spaced tabs protruding axially from one side thereof which are adapted to be received in the gaps in the inner and outer rings, respectively, of a circumferential ring seal to prevent the gaps from aligning themselves. The tabs are desirably located approximately 180.degree. apart to keep the ring gaps on diametrically opposite sides of the seal.

Abstract: Method and apparatus for creating in a water pool a wave for surfing, the pool having a reservoir at one end open to the pool beneath the undisturbed water level of the pool, a fan connected to the reservoir for expelling air from it and drawing water from the pool into the reservoir to store water above the undisturbed water level of the pool, and a valve for selectively sealing the reservoir against the intrusion of air and rapidly ventilating the reservoir so that the stored water flows into the pool by gravity at a velocity near its theoretical limit.