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| Number | Title | Issue Date |
| 4248117 | Die stamping and scoring device, and process for the manufacture thereof A die stamping device for cutting, scoring or creasing a pattern of shapes onto laminar material, comprises a die cylinder having a solid cylindrical core with a coating of setting material such as plastics in which are fitted cutting or scoring blades th... | 02/03/1981 |
| 4248118 | Harmony recognition technique application Techniques for translating the harmony expressed by the keyboard playing of a performer into a chord type and root. Playing key pattern representations are stored in a digital memory at locations having addresses defining the corresponding chord type. A p... | 02/03/1981 |
| 4248119 | Electronic musical instrument providing chord tones in just intonation An electronic musical instrument of a digital processing type comprises a first ROM storing frequency information corresponding to respective notes for producing tones with pitches of the equally tempered scale, a second ROM storing correction data for th... | 02/03/1981 |
| 4248120 | Stringed musical instrument with electrical feedback A stringed instrument with feedback is formed from a string of 30 to 100 feet in length stretched taught and having pickup and driving transducers located at respective opposite ends of the string. An electronic processing system receives a signal from th... | 02/03/1981 |
| 4248121 | Pulse generator for producing the harmonic equivalent of a sawtooth wave An electronic organ tone generating technique produces a harmonic equivalent of a sawtooth wave. In one embodiment square waves generated by a conventional tone generator are applied to a one shot multivibrator, the output of which is a series of narrow r... | 02/03/1981 |
| 4248122 | Music synthesizer There is disclosed herein a music synthesizer which responds to a music note played by a music instrument. The synthesizer has an envelope generator which generates a control signal in relation to the output signal to control the loudness of the synthesiz... | 02/03/1981 |
| 4248123 | Electronic piano An electronic musical instrument using continuous tone generators capable of simulating the sounds of a conventional acoustical piano. The instrument includes a gating circuit featuring a timed switch travel circuit having a double-time constant for impro... | 02/03/1981 |
| 4248124 | Piano soundboard A soundboard for pianos is provided which is of laminated construction, comprising three plies. The top and bottom plies are of equal thickness and lie in planes parallel to one another. The grains of these plies are also parallel to one another. The cent... | 02/03/1981 |
| 4248125 | Support for violin or similar string instrument A shoulder support for a violin or similar string instrument secures to the periphery of the instrument by clamping on an axis generally aligned with the peripheral vertical edge, i.e., the rib, of the instrument. The support comprises a mounting device w... | 02/03/1981 |
| 4248126 | Adjustable bridge A panel having a rear wall is movably secured to the lower portion of a guitar body by a pair of screws allowing it to be moved toward and away from the guitar body. A sliding member is disposed in the panel under each guitar string, with a string contact... | 02/03/1981 |
| 4248127 | String nut A rod secured across the width of the guitar peghead by a plurality of spaced apart fasteners, the rod having a roller disposed thereon for each guitar string, with each roller receiving a string between the roller and the peghead, and means for securing ... | 02/03/1981 |
| 4248128 | Guitar pick array A guitar pick array comprises a plurality of guitar picks mounted in a handle so that the guitar picks are parallel to each other and spaced apart. The array is tapered, the tips of the guitar picks lying along either a single line or two lines making an ... | 02/03/1981 |
| 4248129 | Hi Hat cymbal On a Hi Hat cymbal stand the upper cymbal is one of conventional design and the lower cymbal is a cupless cymbal with four small air release holes through its central portion, each hole being about 1/2 inch in diameter.... | 02/03/1981 |
| 4248130 | Keyboard assembly A keyboard assembly incorporates a plurality of key members molded of thermoplastic material, each of the keys having an integrally formed pivot wall supported on a pair of pivot points disposed on a pair of pivot members integral with a pivot bracket. A ... | 02/03/1981 |
| 4248131 | Fastening device An improved device for interconnecting a pair of different parts together, such as the fastening of a pitot tube to the side wall of an air flow duct of an air conditioning system. The device includes a barrel having a number of resilient legs mounted the... | 02/03/1981 |
| 4248132 | Bullet seating depth gauge A depth gauge for measurement of effective loaded cartridge length in relation to the dimensions along the chamber of the rifle or other firearm. The gauge comprises a caliber cap having an aperture corresponding in transverse dimension to the land diamet... | 02/03/1981 |
| 4248133 | Impact mechanism An impact mechanism operated with gaseous fluid under pressure fed from a source of fluid having a casing with an inner cylindrical space. A piston is accommodated for reciprocation within the cylindrical space of the casing to divide the space into a wor... | 02/03/1981 |
| 4248134 | Reset means for fluid control circuit A control circuit comprises pressurized fluid source (11), a two-position directional control valve (14) and an actuator (13), such as the pump of a hydrostatic transmission, connected to the fluid source and the control valve to be selectively actuated t... | 02/03/1981 |
| 4248135 | Hydraulic ratio changing booster A hydraulic power booster system in which a hydraulic power brake booster has hydraulic ratio changing mechanisms. The ratio is established by trapping hydraulic fluid in a chamber with an input piston having a larger effective area than an output piston ... | 02/03/1981 |
| 4248136 | Thrust device using hydraulic jacks The invention relates to a thrust device using a plurality of hydraulic jacks, and to the automatic control of a plurality of thrust jacks. Two differential jacks have resetting chambers which are permanently under hydraulic pressure. Associated with each jack... | 02/03/1981 |
| 4248137 | Feedback mechanism for variable displacement hydraulic device having an electrohydraulic controller Mechanical feedback through an articulated mechanism is provided between the swashplate of a variable displacement hydraulic device and the output stage of an electrohydraulic servovalve for controlling such swashplate.... | 02/03/1981 |
| 4248138 | Fail safe locking mechanism for fluid operated valve actuator A fail safe mechanism is provided for locking an actuating piston rod of a fluid operated actuator in a selected axial position in the event of a failure, or significant decrease in, the fluid pressure applied to the actuator. Preferably, a secondary cyli... | 02/03/1981 |
| 4248139 | Manufacture of filters for cigarettes A machine for making cigarette filters from filter tow includes a tow fluffing unit for blowing air into the tow before it is compressed; a suction wheel which compresses the tow while extracting air therefrom; and a tongue which further compresses and sh... | 02/03/1981 |
| 4248140 | Duct outlet A tubular section of a duct outlet unit normally is received in an opening in a room wall panel. A grille is rotatably mounted in the outlet end of the unit, and has an axial extension received in a bearing supported by a diametral beam extending across t... | 02/03/1981 |
| 4248141 | Method and apparatus for debittering soybeans A method and apparatus for debittering soybeans and the like to destroy and extract the bitter taste therefrom caused by enzymes lying next to the bean surface directly beneath the skin. Soybeans are loaded into open baskets with foraminous bottoms suspen... | 02/03/1981 |
| 4248142 | Apparatus for extracting citrus peel oil from whole fruit The method and apparatus for extracting oil from the peel of whole citrus fruit accumulates a plurality of rows of citrus fruit articles and then causes mass movement of said accumulation to displace a similar group of whole fruit articles being processed... | 02/03/1981 |
| 4248143 | Interlacing twine wrapping mechanism for rotary balers During the twine wrapping cycle after complete formation of the bale, the bale continues to sping in the baling chamber, and twine from a pair of separate dispensing tubes is wrapped around the bale in helical fashion as the tubes swing back and forth alo... | 02/03/1981 |
| 4248144 | Can crusher having two movable jaws An improved can crusher has two movable jaws, a first jaw and a second jaw, both movably mounted in a support housing. The jaws are initially spaced apart one from the other a distance sufficient to allow a can to be inserted between them. A member capabl... | 02/03/1981 |
| 4248145 | High speed marking apparatus The apparatus is positioned at the exit end of a high speed printing machine having a cylindrical printing plate on a driven shaft. A framework of the apparatus is mounted to the exit end. A first shaft is journalled to the framework and indicia marking m... | 02/03/1981 |
| 4248146 | Impact printing apparatus having pivotable frame structures An impact printing apparatus of the back-impact or front impact type having a frame construction composed of first and second frame structures positioned in a fore-and-aft direction of the apparatus and having impact hammers mounted on one of the frame st... | 02/03/1981 |
| 4248147 | Control system for dot matrix line printer using one print element per character A control system for a dot matrix line printer having one print element for each character position on the line; a single-line memory stores the data words for a line of characters and those data words are supplied to a character signal generator sequenti... | 02/03/1981 |
| 4248148 | Time shared shifting print hammer assembly A plurality of print hammers are mounted on a horizontally movable carriage and adapted to scan a plurality of column positions of an impact printer. Each print hammer is provided with an energizible electrical coil which moves horizontally with the print... | 02/03/1981 |
| 4248149 | Silk screen printing machine A silk screen printing machine wherein a screen is supported on a frame for engagement with an object to be printed. A squeegee is mounted for engagement with the screen during printing, and drive means operate to displace the screen and squeegee from the... | 02/03/1981 |
| 4248150 | Combined squeegee and flood bar for automatic presses A flood bar actuator for initiating the flood cycle in a universal screen printing machine is described. The squeegee assembly is mounted for vertical movement relative to the screen. The flood bar assembly is mounted adjacent the squeegee assembly, with ... | 02/03/1981 |
| 4248151 | Tape guide particularly useful as a print stock guide for impact printers A guide which maintains an edge surface of a tape, such as an elongated strip of print stock, in contact with a reference surface formed on a base of the guide as the tape is moved in a predetermined direction and along a predetermined path. Preferably, t... | 02/03/1981 |
| 4248152 | Field-connected explosive booster for propagating a detonation in connected detonating cord assemblies containing low-energy detonating cord An explosive booster capable of being connected to donor and receiver detonating cords in the field via a cord-connector to propagate a detonation from the donor cord to the receiver cord, at least one of which cords is a low-energy detonating cord, has a... | 02/03/1981 |
| 4248153 | Combination fuze for missiles In a combination fuze for missiles comprising a current generator which is driven by a ram air operated means having ram air supplied through an inlet in the nose portion of the missile and supplying electric energy to an electric firing circuit which com... | 02/03/1981 |
| 4248154 | Mobile track tamping machine with lifting and lining equipment A mobile track tamping machine carries equipment for lifting and lining track in switches and crossings. This equipment comprises a power-driven support frame for lifting and lining, the support frame running on each track rail with a pair of flanged whee... | 02/03/1981 |
| 4248155 | Method for obtaining a controlled degree of ballast compaction in the tamping and leveling of a track A controlled degree of ballast compaction is obtained with a mobile track tamping and leveling machine which comprises a track holding device holding the tract at a leveled position under the control of an error signal from a reference system. The track i... | 02/03/1981 |
| 4248156 | Aerial trackway type tansportation system with improved speed controller A power or current collector of an aerial trackway vehicle has an arm which is movable in accordance with the change of displacement of the current carrying cable with respect to a trackway by which the vehicle is suspended. A speed controller which is se... | 02/03/1981 |
