Abstract: A constructional cement is produced by adding a solution of orthophosphoric acid to a particulate composition comprising at least one of a selection of combinations of oxides, which may be artificially prepared or natural.

Abstract: In a fluid face seal assembly comprising an elastomeric annular seal for engaging in a recess of a stationary housing or the like component, an axially directed extension on a radially inner limb of the annular seal, an annular face seal carried by said extension and spring means acting between said face seal and said annular seal to maintain a resilient relationship between the two, the invention provides a step constituting a carrier member at the free end of the extension and a thickened free end on the step which retains the face seal in abutment against the shoulder between the step and the remainder of the extension, and a retainer acting to compress the thickened end of the step between itself and a radially adjacent part of the face seal thereby mechanically to lock said face seal onto said carrier member.

Abstract: A connector structure comprising a first connector element for securement to the end of a post-like structure, and a second connector element for securement to a further structure. One of the connector elements has a flange with a groove about an inner connecting side wall thereof. The other connector has a projection portion with a groove about an outer connecting side wall thereof. The projection portion is dimensioned for close fit within an inner recess area formed within the area defined by the flange. With the projection portion positioned within the said area, the grooves are juxtaposed to define an endless locking channel. At least one access passage extends through the flange to join the locking channel tangentially to permit passage and insertion of a locking rod at least in a substantial portion of the locking channel. The rod has a cross-section for close fit into the locking channel whereby it can be fitted in the channel through the access passage to lock the connectors from separation.

Abstract: This disclosure relates to an apparatus for erecting structures from flowable and settable material and includes a lifting unit having an open ended shell supported by a carrier pivotally attached to a medial portion of an arm disposed generally radially to the structure which is to be formed, a first pair of relatively telescopically movable inner and outer members connected to an outboard end of the arm in generally tangential relationship to the structure, first means for moving the inner and outer members telescopically relative to each other, and second means for moving the inner and outer members along the arm in a synchronous manner to that of the relative telescopic motion.

Abstract: The control system is provided with a detector that detects whether the ripper is operated in a piercing operating mode or a digging operating mode. In the piercing operating mode the angle of the shank is adjusted to a preset piercing angle, while in the digging operating mode the shank angle is adjusted to a preset digging angle thereby effecting optimum piercing and digging operations. Limit switches for detecting upper and lower limit positions of the shank are provided for raising and lowering the shank between these limit positions while adjusting the shank angle. Further an overload detector is provided for raising the shank when its load exceeds a predetermined load and lowering the shank when the load decreases below it. A manual preference control device also provided for enabling manual control during automatic control.

Abstract: An olefin resin-metal bonded structure having a desirable combination of high corrosion resistance and peel strength, which comprises a metal substrate and an olefin resin layer bonded together through a primer layer, said primer layer containing (A) an oxidized polyethylene having an oxygen content of 0.1 to 10% by weight, a saponification value of 2 to 200, a density of 0.90 to 1.2 and an average molecular weight of 1000 to 50000 and (B) a coating-forming base resin having a density higher by at least 0.1 than the oxidized polyethylene and containing a functional group selected from hydroxyl and carbonyl groups at a concentration of at least 1 meq/g, the mixing weight ratio of the oxidized polyethylene (A) and the base resin (B) being within the following range:(A) : (B) = from 0.2 : 99.

Abstract: A phased array radar having a plurality of antennae, each connected with a respective receiving channel, is provided with apparatus to suppress variations in phase and gain in the receiving channels. The apparatus injects a reference signal into a normally provided head amplifier in each channel, which then passes through the same amplification and frequency changing circuits as the signal induced in each antennae. Thus the differential phase shifts of the reference signal and the radar carrier frequency are substantially constant. The gains of the head amplifiers are controlled by the action of an AGC loop.

Abstract: A retractable cover mechanism for covering an open area, such as a swimming pool. The mechanism comprises a pair of parallel channels secured on a respective opposed side of an open area to be covered. A plurality of displaceable intermediate cylinders are provided in each of the channels between displaceable end cylinders. The intermediate cylinders are water-conducting and the end cylinder at a first common end of both channels is water-conducting. The end cylinders at a second common end of both channels have solid end walls which are non-water conducting. A first extensible conduit means is secured between facing ends of adjacent ones of the intermediate and end cylinders. Attachment means are secured to at least some of the cylinders and to a cover sheet to displaceably support the cover sheet between the pair of parallel channels. First and second conduit means are connectable to a source of water pressure.

Abstract: An assembling set comprising a central rod member consisting of a hub and a number of flanges projecting substantially radially from the hub and being at their ends remote from the hub terminated by arc-shaped heads, adjacent heads having between them a longitudinal groove and a longitudinal cavity connected only with this groove, a structural part, i.e., a peg or a plate being engaged in one of the grooves in the rod member.

Abstract: A scaffolding assembly is made up of independent units each of which is fitted with inside and outside shuttering panels. The assembly is particularly suitable for in situ casting of walls in reinforced concrete, in successive layers which may vary in their inclination to the vertical. Each unit includes a support frame which is attached to one surface of the wall in progress and is fitted with one shuttering panel and a first assembly of catwalks. At its upper end it has a cantilever which overhangs the top of the wall, from which is suspended a movable frame substantially parallel to the support frame. The position of the movable frame on the cantilever is adjustable, to vary its distance from the support frame. The movable frame is fitted with the other shuttering panel and with a second catwalk assembly. A lifting system on the support frame co-operates with attachments on the wall to raise the unit.

Abstract: A device particularly for use in the home or by customers in restaurants, which facilitates the opening of clams or oysters. Known machines for opening oysters are of much too complicated construction to be of any practical value for use in the home or by customers in restaurants. This drawback is overcome by providing an oyster board which facilitates the opening of clams or oysters. The board is of simple construction in order to permit its use by adults and children alike. The improved oyster board comprises a base with a rear wall extending upwardly from the base. The base includes a receiving depression in the upper surface thereof, the depression being situated in the base adjacent at least one longitudinal groove in the rear wall. The at least one groove is situated adjacent the upper surface of the base, and is thereby adapted to receive an edge portion of an oyster or clam therein.

Abstract: An electron-emissive semiconductor device such as a photocathode or an electron multiplier, consists of separate regions of semiconductor material spaced apart by a barrier which reduces current flow between the regions. The barriers improve the performance of the device by preventing excess electron emission currents and reduce image spreading.

Abstract: The invention relates to a continuous flow meat pump which is in the form of a hollow cylindrical chamber enclosed by a top wall, a bottom wall and a side wall. There is an inlet opening in the top wall and an outlet opening in the side wall, and a movable blocking means is disposed over the inlet opening and can be moved to block, alternately, a first portion or a second portion of the inlet opening. A V-shaped wall is included in the chamber to define a V-shaped chamber portion, and the V-shaped chamber portion is disposed underneath the inlet opening. Openings extend through each of the legs of the V-shaped wall, and flap means, freely movable from one leg to another, are included between the legs in the V-shaped chamber portion. The flap means will cover the opening in one leg at any one time. A vane is disposed in the chamber outside of the V-shaped chamber portion and is movable from the outside surface of one leg to the outside surface of the other leg and back again.

Abstract: Method and apparatus are disclosed herein in which particulate material, e.g., seeds, is transferred from a main hopper to an auxiliary storage bin (which may be combined with a dispensing unit) through a hermetic conduit having a rising portion. An air stream produced by a source of compressed air entrains the particulate materiel. A partial vacuum is created in the conduit and dissipates as the auxiliary storage bin fills, reaching or surpassing zero when the auxiliary storage bin is full. The particulate material is introduced into the conduit at the same location as the partial vacuum therein. In a preferred embodiment the particulate material may be drawn out of the main hopper through an outlet chute connected proximate to the construction of a venturi which is connected between the source of compressed air and the conduit.

Abstract: A pulsed powder application system for electrostatically powder-coating a substrate comprises an applicator bed means, a fluidizing means, and a pulsing means. The pulsing means is actuable during a coating time to effect ionization of electrostatic powder particles so as to cause the establishment of an electric field attracting the particles to the substrate, and actuable during non-coating times to cause the establishment of a reverse electric field attracting the ionized particles away from the substrate. A feeder bed means and an associated fluidizing means are provided for holding the electrostatic powder prior to usage for coating by the applicator bed means.

Abstract: In a method of forming a neck and flange at the open end of a thin cylindrical metal can body, the can body is held endwise under compression while an axial shortening force and a radial deforming force are applied to the can body sidewalls, by relative axial movement between the can body on the one hand and, on the other hand, an external forming tool and an internal tool edge which are kept at constant axial spacing from each other, so that the neck and flange are formed in free space without any need for internal or external tools shaped to the required profile; any desired shape can be obtained by varying the characteristics of the relative axial and radial motions.

Abstract: This disclosure relates to a machine for receiving can bodies and automatically outwardly expanding the same to a decorative predetermined contour. The machine includes special transfer means for positioning can bodies on and removing can bodies from supports moving in a convex arcuate path, the transfer device including a turret member mounted for rotation about a fixed axis, a plurality of article carriers pivotally carried by the turret member for movement therewith in a generally circular path, and control means for controlling the contour of a portion of the generally circular path to be coincident with a portion of the arcuate path.

Abstract: The invention relates to a board game to test the deductive reasoning and logical thinking of two or three players. Each player is chosen in turn as code-maker and for each game selects, for example, five key playing pieces each displaying two characteristics, one of, say, shape and the other of, say, color. The other player(s) attempt to break the code by identifying the selected pieces by a process of logical deduction, involving the presentation of test playing pieces of both characteristics for checking by the code-maker.

Abstract: A modular heating section for removing or preventing the formation of ice on the walls of navigation locks, loading docks, ferry slips, or the like. Ice formation on the walls of navigation locks is compressed by successive vessels to the extent that larger vessels are unable to enter the locks. To avoid this happening, ice is chipped from the walls of the locks, which is time-consuming. As well, chipping of the ice results in damage to the concrete walls which must then be repaired. To overcome this problem, the present invention proposes the use of a modular heating section comprising a rigid panel having means for securing the section to a navigation lock wall, loading dock, or the like at a location where ice formation occurs, the panel being made from a heat conducting material. The panel includes heater means situated therein, the heater means adapted to distribute heat throughout the modular heating sections.

Abstract: The invention provides a board game designed to test the logical thinking of two players. The game comprises a board having twenty six rows of playing areas arranged in columns, into which playing pieces may be placed in an attempt to break a hidden code. The rows are numbered A - Z and the attempts are scores according to the nearness to an accurate guess by the player. The code has five such letters forming a word, one letter per column.