Abstract: This invention relates to umbrellas in general. In particular it relates to umbrellas which automatically open and close. This automatic opening and closing of the umbrella in the presented embodiments is accomplished by means of the rotation of a threaded rod.The improvements disclosed herein relate to improved means for more economically controlling the source of motive power used to open and close the umbrella.A key improvement disclosed herein includes a means for conserving the power of the batteries used to power the motor which causes the threaded rod to open and close the umbrella embodiments utilizing this means of opening and closing.An additional improvement disclosed is the use of a multiple-lead threaded rod which avoids the binding and "cross-threading" of previous designs.Also disclosed is a means for conveniently converting the umbrella to the ordinary manually opened and closed umbrella should the necessity occur.

Abstract: This invention relates to umbrellas in general. In particular it relates to umbrellas which automatically open and close. This automatic opening and closing of the umbrella is accomplished by means of the rotation of a threaded rod or with force exerted by compressed gas.The improvements disclosed herein relate to improved means for more economically controlling the source of motive power used to open and close the umbrella.A key improvement disclosed herein include a means for conserving the power of the batteries used to power the motor which causes the threaded rod to open and close the umbrella embodiment utilizing this means of opening and closing.An additional improvement disclosed is the use of a multiple lead threaded rod which avoids the binding and "cross-threading" of previous designs.

Abstract: Modular units are assembled in an array to form a column or beam. The units are provided with apertures and are connected together by bolts or connecting rods. The units are formed of concrete or other cementitious material and points of contact between abutting units include loadbearing plates.

Abstract: A device is disclosed whereby both the opening and the closing of a device commonly known as an umbrella is accomplished automatically.

Abstract: A device is disclosed whereby both the opening and the closing of a device commonly known as an umbrella is accomplished automatically.

Abstract: Apparatus for molding concrete wherein a mold has vertical side members which are mounted for rotation about internal axes substantially parallel to sides of said members.

Abstract: A method has previously been disclosed in the application with Ser. No. 828,312, now U.S. Pat. No. 4,324,037, filed on Aug. 29, 1977 for the construction and assembly of concrete modular units.The present application presents improvements over the methods and embodiments of application Ser. No. 828,312 and the other existing art in its gretaer ease of assembly and reduced cost by virtue of its improved design.

Abstract: A building structural unit and its method of construction is disclosed. Additionally provided is a method for the building of structural arrays with a plurality of the structural units. The structural unit of the present invention provides an inner structural core portion having provided attached to the outer surface thereof load-distributing surfaces. Suitable attachment means can be provided in order to facilitate connection of a plurality of the individual units together forming a structural array such as a wall, slab, ceiling, column, or the like. The structural units can be fastened together by means of tension members such as for example threaded rods, with each individual unit being provided with bores therethrough through which the tension members or rods can pass. Bolted or like connections at the tension member ends bear upon the provided load distributing surface to complete the desired mating of the individual units.

Abstract: A building structural unit and its method of construction is disclosed. Additionally provided is a method for the building of structural arrays with a plurality of the structural units. The structural unit of the present invention provides an inner structural core portion having provided attached to the outer surface thereof load-distributing surfaces. Suitable attachment means can be provided in order to facilitate connection of a plurality of the individual units together forming a structural array such as a wall, slab, ceiling, column, or the like. The structural units can be fastened together by means of tension members such as for example threaded rods, with each individual unit being provided with bores therethrough through which the tension members or rods can pass. Bolted or like connections at the tension member ends bear upon the provided load distributing surface to complete the desired mating of the individual units.

Abstract: A molding machine is disclosed which can be used in the manufacture of concrete building elements. A method for the molding of concrete modular units using the disclosed concrete molding machine is also provided. The molding machine is constructed of vertical walls joined to form a single outer frame which is moveable up and down by means of expandable joints such as pneumatic or hydraulic cylinders which allow positioning and vibration of the outer frame. To said outer frame are attached horizontally expandable joints which support at least two mold sides which can be placed in abutment by the action of the expandable joints so as to form the continuous sides of a mold. The bottom side of the sequentially assembled mold is provided by a metal plate to which the aforesaid sides are lowered or attached.