Abstract: A fire hydrant diffuser comprising a flared housing rectangular in cross section having disposed therein a pair of water diffusing members in opposed relation angled to form a V-configuration and having a stepped mesh structure positioned relative to the direction of flow of water to present narrow obstructing slits for the passage of the water.

Abstract: A coded key operated solid state entry system for a controlled access to a multiplicity of electronic circuits by the use of corresponding coded keys embodying a detection and monitoring system, the detection and monitor system being activated by the insertion into the keyway of a coded key particularly adapted to successively engage a plurality of switches which engage a timer for a timed interval of key insertion and which energizes a circuit to unlatch normally latched tumblers and which upon rotation by the key to the extent of the code of the key, an optic coupling circuit is energized and the code of the tumblers is read, the optic coupler interfaces with a comparator which functions to match the code read with a corresponding coded electronic circuit. If the code is not matched with a corresponding circuit, the timed interval of the timer will expire and the circuit unlatching the tumblers will be caused to become de-energized locking up the tumblers and the key.

Abstract: The invention herein relates to the screen latching apparatus of a hammermill structure in which the improvement consists of a releasing and latching arrangement for the removal and replacement of a screen member by a tension linkage whereby the screen is released for removal from its operating position and the replacement screen is latched into position by the forward and reverse action of an operating handle.

Abstract: A surface mount for removably adhesively attaching an object to a supporting surface, the mount being separable for the ready removal of the object held with a readily separable outward portion of the mount and the remainder of the mount being subsequently carefully removed from the supporting surface free of the held object.

Abstract: A reusable plug assembly to seal the end of a sewer pipe against gas and water leakage used when the sewer pipe has no useable threads or is not threaded at an open end and in which the plug assembly consists of an overlying end seal bearing against the end of the sewer pipe and having a sleeve extending into the sewer pipe, the sleeve having a flared end portion and a wedge member to expand the flared end portion into a line sealing engagement with the adjacent internal wall of the sewer pipe and an external member simultaneously compressing the end seal against the end of the pipe and drawing the wedge member into the flared end portion of the sleeve to expand it into sealing engagement with the pipe, and the plug assembly being sealed against any leakage between its parts.

Abstract: A well screen formed of an extruded wedge shaped plastic strip wound about cylindrically disposed supporting rods in which the flexible strip is extruded of dual durometer dissimilar materials in the form of a unitary strip having complementary characteristics in which one body portion is formed of a suitable substantially rigid plastic material and another body portion is formed of a plastic material which has relatively greater strength characteristics whereby in the event of cracking of one of the portions, the strip is held together in a useable condition by the other body portion and a coating of abrasive resistant material is extruded unitarily with the strip to form an outer surface portion having substantial resistance to wear.

Abstract: A lifting structure for use in connection with relatively small vehicles such as turf or sod cutting tractors or garden tractors to elevate the same into a raised position for the purpose of servicing the vehicles, the structure consisting of a base frame having pivoted thereto by elevating leg members a supporting frame having thereon a pair of adjustably spaced vehicle supporting cross members, an upstanding frame member at one end of the base member carrying a winch being removably connected by a cable to the vehicle supporting frame to raise the elevating leg members into a locked vertical position and the elevating leg members are adapted to position the vehicle supporting frame at a plurality of heights.

Abstract: An electromagnetic pickup is provided for musical instruments, particularly of the type having vibrating magnetizable strings, which pickup device includes a permanent rectangular bar magnet having a configured surface adjacent to the magnetizable strings to provide a varying magnetic field effecting respective ones of the strings in accordance with their magnetizability, and a coil surrounding the permanent magnet which may be either of a low or high impedance. Thin metal plates or shims are arranged in the pickup intermediate the configured surface of the bar magnet and the magnetizable strings. Various configurations of the magnet surface are included, each of which in combination with the metal plates achieves the natural tone of the respective strings and enhances the balance therebetween of the pickup output.

Abstract: A readily assembled self-locking photographic print display frame which consists of a substantially U-shaped base member in which the web has a pair of spaced aligned vertical slots and respectively spaced therebehind are a pair of vertical T-slots, upstanding from and removably secured in the pair of T-slots is a backing frame member and upstanding from the first pair of slots is a transparent face plate member having a pair of depending angled leg members such that when disposed into the first pair of slots causes the face plate member to be angled relative to the backing plate member and have a pressure engagement therewith to secure therebetween a photographic print.

Abstract: A therapeutic educational tracing device consisting of a transparent panel having an eraseable surface, a transparency bearing indicia removably disposed to underlie the panel, a rearwardly disposed mirror angled to reflect the indicia and thus enable a child tracing the indicia to perceive his hand and the indicia in the mirror and perceptually guide his hand in tracing the indicia by a mental process.

Abstract: The respiratory valve face mask herein relates to a structure for use in restoring respiration by providing for a subject of respiratory failure or cardiac arrest a supply of pressurized oxygen enriched air and which permits in the alternative the free passage of ambient air to the subject under atmospheric pressure.

Abstract: This invention relates to the modification of a moving magnet type of a direct current reading meter wherein by the addition of an electro-magnetic coil, the permanent magnet of the meter is influenced by the magnetic field of the coil with respect to the current flow to provide a reading to indicate full scale values of a much lower current value than that of the basic movement of the meter.

Abstract: This invention relates to a wire spring forming machine which consists of structure comprising endless wire feeding rollers which move continuously in a wire feeding direction and feed wire without interruption except for the cutting of each spring as it is formed and this is a substantial improvement over the prior art or general use made of segmental or rack gears which require a reversal of movement to a start position of the gears used for each increment of wire fed for each spring formed and which represents a loss of time during which the structure herein would be forming another spring.

Abstract: This invention relates to a trolling propeller in connection with an inboard-outboard type of boat in which the improvement consists of mounting the trolling propeller onto the main propeller assembly without requiring any adjustment of the relative positions of the main and trolling propellers with respect to the boat and in utilizing the main power source to drive a main propeller or to drive the trolling propeller.

Abstract: This invention relates to an apparatus for printing labels in spaced relation on a continuous moving web which apparatus includes a printing roller, a wick supplying ink to the roller and a spring plate member underlying the wick pressing the same against the roller, the improvement herein consisting of the plate member having a multiplicity of spring like fingers at its free end, the individual fingers engage and apply pressure against the underside of the wick for a uniform inking engagement of the wick with the non-uniform printing surface of the printing roller to print uniformly inked labels on the web.

Abstract: A jar lid loosening device for screw type jar lids consisting of a jar lid receiving member arranged to accommodate a range of different sized lids, a vertically moveable table to support and raise a jar to have the lid thereof come into a holding engagement with said lid receiving member, a motor driven endless screw raising said table, a motor driven sprocket chain rotating said lid receiving member to loosen said jar lid and a switch member causing a reverse rotation of said endless screw to lower said table and the jar therein, removing said lid from said lid receiving member.

Abstract: This invention relates to a readily portable device to disrupt the bomb circuitry as of a home made bomb from a closely positioned point such as on the order of six to twelve inches and operated from a remote point. The device is a light weight tubular member having a barrel loaded with a liquid as a missile and the liquid is expelled by the expansion of gas from a fired cartridge, the gas follows the liquid directly. The liquid upon rupturing and entering the bomb housing disrupts the bomb circuitry and liquid coats the interior of the bomb housing to prevent a fire outbreak and the gas expanding with considerable force upon entering the bomb housing further disrupts the circuitry and other structure therein. The liquid attains a velocity on the order of 500 ft./sec. requiring about 500 microseconds to rupture and to enter the bomb housing and together with the accompanying expanding gas, disrupts the same.

Abstract: This invention is in connection with a sliding shunt type of welder wherein the improvement consists of a shunt being released positioned and secured relative to the core of the welder by a single hand action of the operator, the shunts being carried by a pair of channel members connected by a frame member, the channel members being slideable in a track moveable into and out of operative relationship with said core and with one of the channel members having movement relative to the other channel member and being spring pressed into a normal locked position and with this channel member being released by the squeezing of a handle carried by the frame which retracts the spring bearing against the one channel member and frees both channel members for movement in the track relative to the core by a simple squeezing hand action of the operator.

Abstract: This invention relates to an improvement in an apparatus attached to an air cleaner such as of an internal combustion engine as in connection with a farm tractor wherein the contaminants drawn into the air cleaner are evacuated to the atmosphere therefrom by said apparatus wherein the improvement consists in having the apparatus continuously operative, providing a positive evacuation of contaminants and comprising a relatively small sized motor driving an impeller which receives contaminants from the air cleaner and evacuates or expells the same and embodies the use of a plurality of vanes whereby the engine associated with the air cleaner is prevented from drawing a reverse flow of air through the exhaust passage of the apparatus and the vanes serve as closure means whereby there is no open passage through the apparatus to the cleaner and thus only a low powered impeller is required to expel the contaminants received.