Abstract: A security bar for securely holding in a closed position a horizontally sliding door, such as a so-called patio door, for example, or a horizontally or vertically sliding window. The security bar of the invention consists of a massive metallic or plastic bar member, preferably square or rectangular in cross-section, pivotally supported at one end by means of a bracket from an inoperative position to an operative position wherein the free end of the bar member is supported by a clip with the longitudinal axis of the bar member substantially orthogonal to the rear edge of the frame of the sliding door or window and to a fixed structural surface such as the door or window jamb.

Abstract: An electric motor having an output shaft that rotatably oscillates automatically, the motor comprising a pair of reversing terminals, a reversing switching mechanism for connecting the first reversing terminal to a plus terminal connected to a source of electric power while disconnecting the second reversing terminal from the plus terminal and for connecting the second reversing terminal to the plus terminal while disconnecting the first reversing terminal from the plus terminal, a cam on the output shaft for actuating the reversing switch, and for co-operating with a pair of abutments on the switch limiting the rotation of the output shaft in one direction and in the other, and a spring bias detent for maintaining one of the reversing terminals in connection with the plus terminal until disengaged by the cam.

Abstract: A method and apparatus for cutting a workpiece by electrical discharges by means of a travelling wire electrode according to a path determined by a numerical control program without reducing the machining speed or the current flowing into the wire electrode. At least one of the support and guiding members of the wire electrode is displaced relative to the workpiece along a path resulting from shifting each point of the desired cutting path a predetermined distance in the direction of machining along a tangent to each point of such path. The angle between the tangent at each point of the path relative to the coordinate axes is determined, and each point of the path is shifted relative to the programmed path along coordinates having values proportional respectively to the sine and cosine of the angle.

Abstract: A fluid flow assembly for solar heat absorbers, radiators and the like formed of a pair of tubular headers, defining respectively an inlet header and an outlet header, and placed in fluid flow communication by a plurality of tubular members disposed substantially coplanar and parallel, and connected at each end to one of the headers. The end portions of the tubular members project into the headers through a collective slot disposed in the sidewall of each header. The lengths of the tubular member projecting end portions progressively increase in the direction of fluid flow through the inlet header, the shortest projecting end portion being disposed upstream, and the lengths of the tubular member projecting end portions progressively decrease in the direction of fluid flow through the outlet header, the shortest projecting end portion being disposed downstream.

Abstract: Process and apparatus for cutting by electrical discharge machining cavities and slots in an electrode workpiece by means of an electrode tool, the electrodes being displaced one relative to the other in translation along a predetermined path. The translation motion is controlled such as to maintain predetermined machining conditions in the machining zone between the electrodes, and for additionally displacing the electrodes relative to each other in a direction different from the direction of the cutting path. The additional relative displacement of the electrode may be linear, non-linear, slanted or curvilinear.

Abstract: A heat responsive by-pass flow circuit for a fluid flow system passive element, such as the filter element normally connected in series from an inlet to an outlet. The filter element is provided with a head block or housing having a by-pass passageway between the filter element inlet and outlet, such by-pass passageway being normally closed by a spring loaded valve. A solenoid actuates the valve to open the by-pass passageway under the control of a heat controlled switch having a temperature sensitive element disposed in the flow of fluid at the inlet to the filter element. The heat temperature controlled switch is adjusted to open the by-pass at a pre-set temperature of the fluid flowing into the inlet to the filter element, such as to cause increased direct flow of fluid from a cooler to a working element of the system and back to the cooler, thus reducing overheating of the fluid due to slow fluid flow through the system caused by excessive pressure drop across the passive element.

Abstract: An automatic winding or retracting device for the flexible hose of a gasoline or other petroleum product supply unit. The device comprises a drum for the flexible hose, the drum being connected to a pulley on which is wound a cable connected to a tensioning mechanism.

Abstract: A process and apparatus for increasing the frequency of the effective machining electrical discharges between the electrode workpiece and the electrode tool of an EDM apparatus. The process of the invention consists in monitoring the electrical parameters in the machining zone between the electrodes such as to detect short circuits, and, when a short circuit is detected, in continuing monitoring the electrical parameters until monitoring indicates the disappearance of the short circuit, in cutting off the ongoing electrical discharge after a predetermined time interval following the moment at which said short circuit disappears and in re-establishing normal electrical voltage pulses after another time interval following the end of the discharge. The invention also provides appropriate apparatus for practicing the process.

Abstract: A removable light-weight, apparatus for the aeration of a body of water or other liquid in a tank or a pool having a submerged liquid source or inlet port supplying a continuous or a sporadic stream of liquid into said tank, said aeration apparatus comprising an air induction tube extending between and communicating at its upper and lower ends respectively with the ambient atmosphere and the liquid stream, and support means for said tube, the reduced pressure along the stream of liquid drawing air from the atmosphere into the liquid in the tank. A conduit may be provided coupled to the outlet of the liquid inlet port, the lower end of said air induction tube being inserted through the tubular wall of said conduit so as to permit the air in the lower end of the air induction tube to communicate with the liquid moving through the conduit, said conduit preferably terminating in a filter or a diffuser.

Abstract: Paper provided on one surface with a mesh-like pattern, for example a diamond-shaped pattern, or reinforcing extruded plastic material. The extruded plastic material is applied to the paper surface in the form of a plurality of narrow thin stripes or strands adhering to the surface and penetrating through the mass of the paper due to the porosity of the paper and drawing of the plastic material through the paper during application of the plastic stripes or strands by applying vacuum to the opposite surface of the paper. The reinforced paper of the invention is particularly useful for making good-carrying bags commonly used for carrying groceries and other purchased articles from a store.

Abstract: A method for compacting powder material into an article comprising pouring the powder material in a die cavity formed above a lower punch disposed in the die cavity, retracting the lower punch to a small distance, introducing an upper punch into the die cavity, advancing the lower punch towards the upper punch and advancing the upper punch towards the lower punch at a rate greater than the advance of the lower punch, and extracting the compacted article from the die cavity by holding it between the upper and lower punch.

Abstract: Central guide means for the piston rod of apparatus provided with a piston reciprocating in a cylinder and comprising a piston rod centrally journaled proximate its free end between two journaling points of a guide lever, the guide lever being essentially oriented in the axial direction of the cylinder and being journaled at two journaling points on a pair of connecting rods of equal length. Fixed pivoting shafts are disposed parallel to each other and spaced equidistantly on opposite sides of a longitudinal axis of the cylinder, the pivoting shafts being coupled to the connecting rods and separated relative to the longitudinal axis of the cylinder by a distance corresponding to the distance between the journaling points of the guide lever.

Abstract: An EDM method and apparatus for cutting a workpiece by a wire electrode in the form of a metallic tape or wire, in which the traction exerted on the wire electrode by the mechanism feeding the wire electrode in the machining zone between the wire electrode and the workpiece is modified momentarily, and the variation of machining rate caused by the momentary modification of the force of traction exerted on the wire electrode is detected. The direction in which the machining rate is changed provides an indication of the effect, on the wire electrode, of the transverse forces which deflect the wire in the machining zone, relative to its longitudinal axis. The direction in which the machining rate varies is used to select the direction in which a predetermined machining parameter affecting the transverse forces applied on the wire electrode is changed, such as to maintain the wire electrode properly aligned along its longitudinal axis.

Abstract: An apparatus and method for compacting powder material into a prismatic or pyramidal article in a molding cavity formed by the end face of a lower punch reciprocable in a die bore, a portion of the die bore and the end faces of a pair of telescopic concentric punches being disposed above the die bore. The lower punch end face forms an end surface of the prismatic or pyramidal article, the die bore wall forms the peripheral surface of the article, and the upper telescopic punches form the other end surface of the article, one of the telescopic punches being disposed peripherally to the other punch and forming a sharp edge between the peripheral surface of the article and its other end surface.

Abstract: A constant torque power transmission consisting of a rotating mass, or gyroscope, rotating around a first axis and supported by a frame or enclosure in turn pivotally supported about a second axis at right angle to the first axis by a gimbal, the gimbal being pivotably supported around a third axis disposed at right angle to the second axis. The reciprocating member of a crankless reciprocating engine, of the free piston or free-cylinder type, oscillates the gimbal and the rotating mass about the third axis, causing the rotating mass frame or enclosure to develop a precessional force oscillating about the second axis. The oscillating precessional force is applied to an output shaft through a one-way clutch assembly.

Abstract: A resilient mounting for a reclining seat, the mounting including a first member to be secured to a supporting base for the seat, a second member to be secured to the seat and which is pivotally connected to the first member, and a torsion bar which forms the pivot for the two members and which provides a return bias when one of the members is tilted relative to the other.

Abstract: A combined shutter and awning protective device for an opening in a wall such as a window, comprising a plurality of slats of uniform cross-section slidably received within one another and having a rotary member by means of which the shutter can be rolled upon the rotary member to provide for raising and lowering thereof. The device includes frame members which are pivotable whereby the device can be pivoted outwardly from a wall or the like to act as an awning. The device also includes frame sections secured to the wall which allows the device, in its non-pivoted position with the shutter fully lowered, to secure itself in position over the window or the like to act as a protective and security covering.

Abstract: A solar heat absorber for solar heat collector panels, formed of a pair of tubular headers, defining respectively an inlet and outlet header, and a plurality of flat tubular members disposed substantially coplanar, parallel and mutually adjoining, and connected at each end to one of the headers. In use, the absorbers of the invention are disposed as heat collector units in appropriate areas exposed to sun rays, and a fluid to be heated is circulated from one header to the other, the heat being soaked by the tubular members exposed to the sun rays being transmitted to the circulating fluid which is progressively heated as it flows from one header to the other.

Abstract: A dual-chamber pneumatic tire having two separate concentric annular air chambers. The outermost air chamber, disposed behind the tire tread normally in contact with the ground, is toroidal and substantially elliptical in cross-section, and is inflated at a higher pressure than the innermost chamber disposed in the remaining volume of the tire. The two chambers are separated by a wall or diaphragm which is integrally attached to the tire casing interior walls or which is, alternatively, made removable. The low pressure innermost chamber is inflated by means of a conventional air valve, while the outermost chamber is inflated by means of an additional air valve connected to the wall or diaphragm by means of a flexible hose. The structure of the invention is particularly adapted to tubeless tires.