Abstract: A heat separator for generating a warmer gas and a cooler gas from a gas in equilibrium, comprising two filtering meshes separated by a channel.

Abstract: Provided according to the invention is a fastening tool (10) for tightening/untightening screw threaded fasteners such as bolts or nuts (18). The bolts (18) comprise a head formed with a series of at least three cavities (18a) deployed therearound. The fastening tool (10) comprises at least three peanut-shaped displaceable locking bodies (16) having spherical portions (16a; 16b), and a restricted neck portion (16c) therebetween. The cavities (18a) of the bolt (18) are configured to receive the spherical portions (16b). A seat member (12) is provided, formed with a series of at least three cavities (22) configured to receive the spherical portions (16a). Further provided is a manipulator (14) for rocking the locking bodies (16) about their neck portions (16c) from a non-operative position wherein the spherical portions (16a) are seated in the cavities (22), into an operative position wherein the spherical portions (16b) are seated in the bolt cavities (18a), and vice versa.

Abstract: Provided according to the invention is a fastening tool (10) for tightening/untightening screw threaded fasteners such as bolts or nuts (18). The bolts (18) comprise a head formed with a series of at least three cavities (18a) deployed therearound. The fastening tool (10) comprises at least three peanut-shaped displaceable locking bodies (16) having spherical portions (16a; 16b), and a restricted neck portion (16c) therebetween. The cavities (18a) of the bolt (18) are configured to receive the spherical portions (16b). A seat member (12) is provided, formed with a series of at least three cavities (22) configured to receive the spherical portions (16a). Further provided is a manipulator (14) for rocking the locking bodies (16) about their neck portions (16c) from a non-operative position wherein the spherical portions (16a) are seated in the cavities (22), into an operative position wherein the spherical portions (16b) are seated in the bolt cavities (18a), and vice versa.

Abstract: A rotary machine in which plural, non-cylindrical rotors are provided for rotation within partially overlapping cylindrical bores, formed within a machine housing. Each rotor each said rotor has a curved outer surface formed of a plurality of contiguous mutually tangential curved portions.* The rotors are eccentrically mounted for synchronized, same directional rotation, within their respective bores, and each is arranged to alternately provide intake and exhaustion of working gaseous fluids, such that each rotor is continually either admitting or exhausting a working gas. The machine is constructed such that the rotors are cylindrical, each being of internally balanced form. The rotors do not touch each other or any portion of the machine casing at any time, while being positioned so as to define minimal gaps therebetween. A high rotational speed may be developed, thereby obviating the need for seals entirely, and thus further increasing the available speed, and thus the work efficiency of the machine.

Abstract: A rotary machine in which plural, non-cylindrical rotors are provided for rotation within partially overlapping cylindrical bores, formed within a machine housing. Each rotor each said rotor has a curved outer surface formed of a plurality of contiguous mutually tangential curved portions.* The rotors are eccentrically mounted for synchronized, same directional rotation, within their respective bores, and each is arranged to alternately provide intake and exhaustion of working gaseous fluids, such that each rotor is continually either admitting or exhausting a working gas. The machine is constructed such that the rotors are cylindrical, each being of internally balanced form. The rotors do not touch each other or any portion of the machine casing at any time, while being positioned so as to define minimal gaps therebetween. A high rotational speed may be developed, thereby obviating the need for seals entirely, and thus further increasing the available speed, and thus the work efficiency of the machine.

Abstract: A rotary machine in which plural, cylindrical rotors are provided for rotation within partially overlapping cylindrical bores, formed within a machine housing. The rotors are eccentrically mounted for synchronized, same directional rotation, within their respective bores, and each is arranged to alternately provide intake and exhaustion of working gaseous fluids, such that each rotor is continually either admitting or exhausting a working gas. The machine is constructed such that the rotors are cylindrical, each being of internally balanced form. The rotors do not touch each other or any portion of the machine casing at any time, while being positioned so as to define minimal gaps therebetween. A high rotational speed may be developed, thereby obviating the need for seals entirely, and thus further increasing the available speed, and thus the work efficiency of the machine.

Abstract: A method of growing tissue culture callus on a nutrient substrate comprises the steps of preparing a semi-solid slab of the nutrient substrate and placing it on top of a honeycomb-like forming plate, which defines a plurality of hollow passages surrounded by thin walls. A series of the callus is deployed on the slab, so that each callus is located in alignment with one of the passages. The callus are allowed to grow to a desired extent under conventional conditions. A pneumatic pressure is then applied to the slab so that it becomes pushed through and sliced by the walls of the forming plate into a respective number of blocks, each carrying a single plant, and ejected out of the bottom side of the forming plate for further plantation thereof.

Abstract: A method of growing tissue culture callus on a nutrient substrate comprises the steps of preparing a semi-solid slab of the nutrient substrate and placing it on top of a honeycomb-like forming plate, which defines a plurality of hollow passages surrounded by thin walls. A series of the callus is deployed on the slab, so that each callus is located in alignment with one of the passages. The callus are allowed to grow to a desired extent under conventional conditions. A pneumatic pressure is then applied to the slab so that it becomes pushed through and sliced by the walls of the forming plate into a respective number of blocks, each carrying a single plant, and ejected out of the bottom side of the forming plate for further plantation thereof.

Abstract: A pull-through for cleaning fire-arm barrels. The pull-through is generally comprised of multifilament synthetic fiber line, and has a cleaning cloth loop at one end and a weight at the other end. The loop is formed by twisting the free end of the line about an intermediate portion thereof to form a convoluted section. The convoluted section is embedded within a solid body of a moldable, usually plastic, material. A method for producing the pull-through is also disclosed.

Abstract: A theft-resistant fastener system includes a rotatable wrench adapted to engage a head portion of a fastener and to rotate that fastener and head portion about a fastener axis. The wrench and fastener jointly have at least three ball-and-socket joints distributed about the fastener axis. Each of these ball-and-socket joints has a ball in the wrench and a socket in the head portion of the fastener, with each socket being provided with a circular cross-section about a socket axis extending at an acute angle to the fastener axis. The wrench has a releasable actuator for pressing the balls into the sockets preparatory to and during rotation of the wrench about the fastener axis. The head portion of the fastener is prevented from clearing the balls, when the actuator presses these balls into the sockets, by providing that head portion at each socket with an overhang extending over part of the ball in that socket.

Abstract: A sheet having apertures registering with said locations of the receptacle in the first orientation is used to distribute seeds or tissue culture elements. The receptacle may be placed in a growth medium reservoir and the plant precursors delivered through conduits from the apertured sheet to the receptacle by means of pressurized gas. After some growth the receptacle is reoriented to the second orientation. Apparatus is disclosed to perform the reorientation.

Abstract: A single hand held and operated tool comprising a housing; a hydraulic fluid reservoir located in the housing; a hydraulic pressure cylinder located in the housing; a hydraulic piston moving with respect to the pressure cylinder in response to hydraulic pressure produced therein; a hydraulic pump operable by a single hand while grasping the housing and coupled to the fluid reservoir and to the pressure cylinder for forcing hydraulic fluid received from the reservoir into the cylinder; and valve apparatus governing fluid communication between the hydraulic pump and the pressure cylinder and operative in response to hydraulic pressure in the cylinder for lowering the quantity of hydraulic fluid supplied to the cylinder by each pump stroke when the pressure in the cylinder exceeds a predetermined pressure, thus providing two-speed tool operation.

Abstract: A single-hand operated tool comprising: first and second relatively movable elements adapted to be associated with a head assembly for application of pressure to a workpiece; a housing; a hydraulic pump disposed within the housing; hydraulic fluid communication means associated with the pump for exerting hydraulic force on the relatively movable elements; articulated lever means associated with the pump and arranged such that reciprocal motion of the lever means provided by the action of a single hand, unassisted, operates the pump and produces a desired force on the workpiece; release valve means for releasing the force exerted by the hydraulic fluid in response to a manual actuation produced by the single hand and including a valve stem and seat wherein the force urging seating of the valve stem against the valve seat is smaller than the desired force.