Abstract: A unit for converting a bottle or similar receptacle having a neck into a lamp, said unit mounted around the outside of the bottle neck. The basic portion of the unit consists of an inverted cup whose inside diameter exceeds the outside diameter of the bottle neck. The cup carries at least three threaded engaging screws at its lower end. The lower end of a conventional lamp pipe carrying a lamp socket at its upper end, is threaded into the upper central portion of the inverted cup. A self-locking press-plate is threaded at the bottom end of the lamp pipe inside the cup so that the plate rests on top of the bottle neck. At the lower end of the cup, screws engage the bottom end of a shoulder on the bottle neck such that as the lamp pipe is threaded into the cup, the cup and the engaging screws are pulled upwardly thus a compressive force is developed between the shoulder and the top of bottle neck which force holds the unit firmly onto the bottle to complete a lamp.
Abstract: An acoustical muffler for a turbofan engine is disclosed. The muffler is utilized on the tail cone plug and comprises a plurality of circumferentially spaced slots oriented in parallel relationship to the grazing flow (the exhaust stream of core engine and fan discharge air). The slots have depending walls extending into the hollow central portion of the plug. Barriers at the upstream and downstream ends serve to define the volume of the plug. The relationship between the slots and volume is selected to tune the muffler to the desired frequency of peak attenuation. Radial extending barriers discretely mounted within the plug help to prevent airflow into and out of the slots.
Abstract: The sound absorbing and diffusing unit is provided for assembling an acoustic screen which can be placed or hung in front of a wall inside an acoustic room for improving a sound-effect therein. These units are detachably joined together with each other so that they may be easily separated and assembled again to form an acoustic screen having another shape or construction to adjust or modulate a sound-effect. A sound absorbing porous panel having a desired picture or pattern can be easily hung against a wall. The decorative panel can be reversely hung on the wall to provide another interior ornamentation. Accordingly, an acoustically correct room and a desired ornamentation on a wall inside the acoustic room can be easily obtained and changed without providing a rigid reverberating surface of the room.
Abstract: A calculator is described which greatly simplifies the calculation of the required feeder head parameters, e.g. size, amount of antipiping compound, in casting metals. Only the size of the casting section being fed and the normalized inscribed circle relating thereto need to be measured.
Abstract: A fluidic square root extractor is disclosed having an amplifier for generating an output in response to an input signal the square root of which is to be extracted, and a squaring means for squaring the output signal and applying it as said feedback signal to the amplifier.
Abstract: This invention relates to a stethoscope having improved acoustical properties. The improvement comprises twin, smooth-walled sound pathways extending from the chestpiece to the ear tips which are free of sound leakage and each pathway has a constant diameter along its entire length.
October 16, 1978
Date of Patent:
April 29, 1980
Minnesota Mining and Manufacturing Company
Robert D. MacDonald, III, Frederick W. Nelson
Abstract: A speaker assembly comprising a first cabinet or housing of a pyramidal configuration having a speaker element mounted therein in such a manner that the sound emitting from the speaker is concentrated in a direction outwardly of the pyramid, and a second housing of pyramidal configuration disposed in spaced relation to the speaker element whereby the sound emitting therefrom is directed against the walls of the second pyramid to provide a complete sound emission from the assembly through three hundred and sixty degrees.
Abstract: The fabrication of ultrasonic-wave lenses and prisms using low-surface tension (poor adhesion) polyalkene sheet (such as polyethylene) as an impedance-matching quarter-wave anti-reflective layer is made possible by the use of certain very low surface-tension cements.
April 6, 1978
Date of Patent:
April 15, 1980
Gerard A. Alphonse, William C. Saunders, Jr.
Abstract: An acoustic transducer for reproduction of sound over a wide frequency band. The transducer consists of an elongated partially enclosed chamber having a sound source at one end and wherein the cross-sectional area of the chamber is decreased with distance along the length of the chamber away from the sound source. A curved wall is included in the chamber to serve as an expanding horn, the lower end of which is provided with an elongated slot aperture which widens exponentially as a function of the length of the chamber through which sound energy is delivered to the aperture of the horn.
Abstract: The speaker grill is a part of a molded plastic member which may form a wall of housing for a device which includes an audio transducer. The plastic member includes provisions for supporting the audio transducer adjacent the grill, which has openings for the transmission of sound. The grill has stress regions in which there are no openings, which are in tension when the grill is flexed to thereby increase the strength of the grill. The stress regions may extend across the grill in an "X" pattern, or in any other pattern wherein one of a plurality of such regions extends transversely with respect to another region. The openings for sound transmission may be slots extending from the sides of grooves, which form labyrinth openings so that there is no direct passage through the grill, thereby tending to prevent entry of undesired objects.
Abstract: In a counter reset to zero by a push button and adapted to be mounted on a tape recorder or the like, there are provided a U shaped frame including a bottom plate, a pair of side plates, a spacer parallel with the side plates, a plurality of pinion aligning resilient members secured to the bottom plate, a digit wheel shaft supported by the side plates, a plurality of digit wheels rotatably mounted on the digit wheel shaft, and a driving gear rotatably mounted on the digit wheel shaft for driving a digit wheel of the lower most order. Each digit wheel comprises a heart shaped cam and a gear on one side and a carry pin gear on the other side. A zero resetting bracket is pivotally mounted on the frame and is provided with actuating members for actuating the heart shaped cams. The digit wheels are rotated by the source of drive of the tape recorder through the driving gear and each time a digit wheel of the lower order completes one revolution, a digit wheel of the higher order is rotated by one digit.
Abstract: A method of and a device for attenuating the noise radiated by a free-expion gas jet throughout the audible-frequency range as well as in the ultrasonic and infrasonic frequency ranges. Concomitantly with the complete and shock-free expansion of the gas into the atmosphere, the acoustic field of the jet is organized by the substantial diminution of the low-frequency tones by causing them to pass from the annular section of the jet to the narrow annular section of the nozzle slot. This is followed by sound-wave diffraction on emergence from the slot in the presence of a baffle, and by a wave reflection towards the sound-absorption lining of the device housing. The final noise results from an intensive ejection of ambient air by the primary gas which, leaving the nozzle slot, entrains the air by means of turbulence, the air entering through the annular channels of the case, reaching the outer orifices of the nozzle, and dividing into two flows, namely inside and outside the nozzle.
June 30, 1978
Date of Patent:
April 8, 1980
Institutul National Pentru Creatie Stiintifica si Tehnica - Increst
Abstract: A device for communicating in which a hollow frustum extending outwardly from a flat base has tabs at the ends thereof for holding a relatively rigid diaphragm having spaced apart apertures therein. A pair of these devices are interconnected by a cord or string, whereby conversation or sound projected into one of the devices is reproduced at the other device. Two devices are molded as a single integral unit and merchandised as an in-pack item with children's breakfast cereals.
Abstract: A peg board scoring device for scoring the game of euchre is disclosed. A first plurality of spaced apart apertures are disposed in a base along a first pair of converging lines intersecting to form a "V". A second plurality of spaced apart apertures in the base are disposed along a second pair of lines converging to form a mirror image of the first pair of converging lines. The intersection of the first pair of lines and the intersection of the second pair of lines are spaced apart a distance. The first and second pairs of spaced apart apertures are used by opposing players to score a game euchre. A third plurality of evenly spaced apart apertures extends inward from a left edge of the base perpendicular to the edge to provide a device for one of the players to score the games he has won. A fourth plurality of evenly spaced apertures extending inward from the right edge of the base is used by the second player to score the games won by him.
Abstract: An internal pinion revolution counter includes a bearing member rotatably supporting an input shaft. At least first and second number wheels are provided each having a radially outwardly extending web portion joined to an annular flange portion, the first and second number wheel flange portions respectively extending toward each other. Each web portion has an annular bearing surface which defines a central opening. The flange portion of the first number wheel has an internal gear segment and cooperating internal locking cam formed thereon, and the flange portion of the second number wheel has an internal full tooth gear formed thereon. The first number wheel is connected to the input shaft for rotation therewith. A pinion carrier is arranged within the center opening in the web portion of the second number wheel, surrounds the input shaft, and is secured against rotation with respect to the input shaft.
Abstract: A loudspeaker horn, which is divided into three segments, is provided with a valve for projecting sound either through the central segment or through all of the segments, said valve being adjustable from the front of the loudspeaker by a knob which has markings thereon to indicate the position of the valve and which is provided with means for retaining it in the position set by the knob.
Abstract: There is disclosed a marine navigational calculator device of the slide rule type whereby tidal depths over bottom structures may be determined as a function of the time of the tide or time of calendar day and whereby the entire time span available to a mariner to successfully negotiate such charted bottom structures for a given tidal flow is visually presented.
Abstract: The present invention relates to refractive stigmatic systems designed to deflect or focus elastic surface waves which can propagate at the surface of a substrate. The object of the invention is a lens or prism comprising an array of elementary refractive zones formed by deposition or ion implantation and intended to produce uniform attenuation of refracted vibrational radiation.
Abstract: A presetting counter device comprising a ratchet wheel coupled to a cycle number setting dial and being stepwise rotatable for reducing the setting of the dial, an indexer engageable with the ratchet wheel in operative relation to the movement of a cyclically movable device to rotate the ratchet wheel stepwise by one pitch thereof at a time, a cycle repeating signal generator, a member movable with the ratchet wheel for actuating the signal generator and having a signal generator actuating portion with the same pitch angle as the ratchet wheel, and the ratchet wheel being adapted to be temporarily halted in the course of its stepwise rotation at a position where the signal generator is held actuated by the actuating member.
Abstract: A panel of acoustically reflective material is removably supported on the bell of a wind instrument by a bracket which is jointed so that selectively the panel can be, (1) angularly positioned to reflect the sound back to the player or in other directions, (2) moved toward and away from the bell to adjust reflection of the sound, (3) moved to a muting position, and (4) moved to a non-reflecting location.