Abstract: An intercommunication and alarm telephone system has a common control in the form of a clock driven central unit connected to an alarm control unit and one telephone line shared by a plurality of station units. The central control unit provides means for answering and placing outside telephone calls to a central telephone office, holding and transferring such calls, giving paging and intercom services, excluding and locking out other stations from outside calls, giving suitable alarms, and such other services as may be necessary or desirable.

Abstract: The inventive cable tie gun uses simple slides and lever arms and does not require common linkages, toggles, or other complex mechanical actions that are subject to malfunction. Near the end of the tensioning slide travel, there is a mechanical interference between two moving parts (i.e. between a cable tensioning slide and a cable severing lever arm having a blade attached thereto.) However, if the cable tie tension exceeds the pulling capability of the tensioning slide, one of the moving parts is immobilized and the interference does not occur. Thereafter, the cable severing lever arm may take a full stroke and cut off the strap end while the tensioning slide is being held at midstroke position by the tension in the cable tie strap. The performance of the cable tie gun is greatly improved by a correct choice of cam surfaces, whereby the parts help and do not oppose each other.

Abstract: A pliers-like device is primarily designed to cut and remove clamps from flexible hoses, such as radiator hoses, for example. A tooth is formed at the end of each jaw of the pliers to reach under the hose clamp and start the cutting process. The opposed pliers jaws have interleaving blades, at least one of which has a knife edge. A pair of opposed cavities are formed on opposite jaws to hold the tab ends of a wire spring hose clamp while it is being expanded. The gripping jaws of a conventional pair of pliers are also provided.

Abstract: A locking device for adjustably locking two mutually movable parts with respect to each other, particularly for preventing an automobile seat from sliding longitudinally along the floor of an automobile. A stationary member is secured to the floor and is provided with teeth for cooperating with a toothed member which is secured to the automobile seat. The two sets of teeth are normally urged into engagement with each other by means of a spring member. For adjustment, the second part can be displaced at right angles to the floor in such manner that the two sets of teeth are disengaged, thereby permitting the seat to slide longitudinally with respect to the floor.

Abstract: A crank bearing device for pedal vehicles comprises a cylindrical crank bearing shell, which is connected to the vehicle frame. A crank passes through this shell with a ball bearing bushing at each end of the crank arm. Between each of such a bushing and a cone, threaded onto the crank, are placed a number of ball bearings. The invention provides that these bushings have a cylindrical outer surface cooperating with a cylindrical inner surface of the shell and are provided with a number of low, protruding ribs. Through driving the bushing into the shell the ribs are forced into the material of the shell, thereby interconnecting the bushing and the shell with each other.

Abstract: A solution for chemically polishing surfaces of copper and its alloys contains acid oxalates at a pH value of 3.0 - 5.0 in combination with hydrogen peroxide and one or more stabilizers and brighteners.

Abstract: A traffic usage recorder is used with a telephone switching network to verify the grade of service being given by observing simultaneous traffic on groups of equipments. The recorder has a plurality of input terminals, each of which may be connected with a corresponding input device, such as a sleeve lead which may be marked with a distinctive busy potential. The busy potential indicates circuit usage. The individual sleeve leads are repeatedly scanned in sequence to detect a presence or absence of the busy potential and therefore the circuit usage prevailing at the time of scan. The data derived therefrom is processed to indicate CCS units, peg count, maximum switch usage, and a cumulative time during which the maximum usage occurs. (The term C.C.S. means one hundred seconds of call time). Periodically (such as once every hour), the processed data may be read out in any suitable manner. The traffic usage recorder verifies the statistical tables which are used to make traffic studies.

Abstract: A frangible top can has a top containing a laminated, two layer insert which comprises an upper plate containing a scored area and a lower plate having an opening. A depression, formed in the upper plate, fits snugly into the opening, which is formed in the lower plate. Thus, the depression may act as a stopper for the opening, when the can is resealed.

Abstract: The inventive process produces a Li(NbTa)O.sub.3 single-domain, single-crystalline film on a lithium tantalate single-crystal. The film is grown on the lithium tantalate, single-crystal by hydrothermal synthesis wherein the alkaline solution is heated to a temperature which is lower than the Curie point temperature of lithium tantalate. The mother material is a mixture of tantalum and lithium salts.The resulting film may guide several modes of light, and possibly modulate them.