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| Number | Title | Issue Date |
| 4396928 | Printer controller for laser beam printer A control system for controlling a laser beam printer in which a light-sensitive drum surface is scanned on a line base with a laser beam modulated in accordance with data to be printed. The width of scanning lines is broadened so that the adjacent scanni... | 08/02/1983 |
| 4396089 | Sound muffling cup The invention is directed to providing a sound muffling cup into which an enraged person can shout to release tension while avoiding disturbing other persons. The cup comprises an elongated body portion having a substantially closed end wall at one end, a... | 08/02/1983 |
| 4395625 | Container counter A container counter for counting elongated objects such as empty beverage cans including a hopper for receiving objects to be counted, a plurality of chutes located below and communicating with the hopper for conveying objects out of the hopper, and an os... | 07/26/1983 |
| 4395721 | Laser beam printer A laser beam printer in which latent images are produced on a light-sensitive drum through line scanning with a laser beam modulated with print information to be printed. The laser beam is modulated with the information to be printed in such a manner that... | 07/26/1983 |
| 4394671 | Electrographic recording In an electrographic recording system wherein a dynamic bridge of toner particles, the particles having electrical and magnetic properties, corresponding to a concentrated magnetic field formed between a toner carrier and the recording medium, an improved... | 07/19/1983 |
| 4392547 | Hearing aid earmolds A resonant earmold for amplifying selected frequencies of the sound signal introduced into the earmold. The path for sound through the earmold includes transversely disposed, off-axis elongated chamber sections (24,25), the various sections functioning as... | 07/12/1983 |
| 4392194 | Circuit arrangement for controlling a large number of printing electrodes for non-mechanical printing A large number of printing electrodes are combined to form groups which each time have a common switching point, each printing electrode of the same ordinal number of each group being connected to a common voltage amplifier. A capacitor (C) is connected b... | 07/05/1983 |
| 4390079 | Muffler and exhaust extractor A muffler and exhaust extractor especially adapted for internal combustion engine powered vehicles such as over the road diesel tractors. The muffler and exhaust extractor generally stated comprises a pair of spaced curved airfoils for directing the airst... | 06/28/1983 |
| 4390887 | Electrographic recording stylus A stylus array for electrographic recording which includes a laminated stack of stylus elements, each separated from the next adjacent stylus element by a non-conductive layer. The stack array of stylus elements is contoured to have a forward end shaped t... | 06/28/1983 |
| 4389659 | Electro-optic line printer In an electro-optic line printer having a light valve comprising an electro-optic element with a plurality of individually addressable electrodes, sample and hold circuits maintain the data samples for each line of an image on the electrodes for essential... | 06/21/1983 |
| 4387787 | Loudspeaker having acoustic impedance frontal loading element An improved acoustic impedance for a direct radiating dynamic loudspeaker having a natural Q greater than about 1.2, is substantially planar and is positioned in front of and covers the projected frontal radiation area of the diaphragm or cone of the loud... | 06/14/1983 |
| 4386265 | Electronic cash register The electronic cash register includes a slip printer unit in addition to a two-station printer housed in a main cabinet, wherein the slip printer unit includes a slip printer and a slip feeder both housed in a casing mounted on the long, narrow top surfac... | 05/31/1983 |
| 4385306 | Dot writing head for high definition printers, and a method of manufacturing the same The head is composed of a series of electrically conductive elements in one or more rows, which elements are selectively subjected to a high potential relative to the coacting electrode. The elements have a thickness of less than to 50μ and a pitch less than ... | 05/24/1983 |
| 4382264 | Magnetic imaging transfer process Magnetic imaging method wherein a latent magnetic image is created on a magnetizable imaging member comprising a base or web containing a magnetizable component. After development of the latent image with a magnetic toner composition, the developed image ... | 05/03/1983 |
| 4380768 | Magnetic printer and printhead A magnetic print module for use as a printhead of a magnetic printing system. The print module comprises a base having a matrix of integral protrusions extending upward from the base and a plurality of coils wrapped around the base between the rows and co... | 04/19/1983 |
| 4378859 | Silencer for intake/exhaust gas duct The disclosed silencer has noise-absorbing partitions disposed in a gas duct in parallel with but with a spacing from outer walls of the duct, so as to define gas passage means and noise-absorbing space means in the duct. The noise-absorbing space means i... | 04/05/1983 |
| 4377219 | Loudspeaker having apertured acoustic impedance frontal loading element A direct radiating dynamic loudspeaker has an apertured impedance frontal loading element for improving its acoustic impedance. A planar sheet of nonrigid, fibrous air-permeable material has an apertured area and is positioned in front of the diaphragm of... | 03/22/1983 |
| 4377102 | Piano construction In a piano a panel, which takes the place of the usual cast iron string plate or frame, is provided for supporting the strings. The panel is a sandwich construction making it exceptionally strong and capable of withstanding the string loads without bendin... | 03/22/1983 |
| 4375841 | Fluid flow apparatus for accommodating a pressure drop An apparatus is disclosed for receiving a high pressure fluid flow to accommodate a drop to a lower pressure fluid flow with attenuated noise, incorporating an initial diffuser stage followed by balance in-line stages so that each stage is subcritical to ... | 03/08/1983 |
| 4375030 | Extended range variator conversion mechanism Conversion of an extended range mechanical fuel pump computer price variator for selectively substituting an optional $3, $4 or $5 unit volume price adder for an optional $1 or $2 unit volume price adder.... | 02/22/1983 |
| 4373417 | Electric guitar The economy of manufacture of electric guitars and electric bass guitars is improved, with no loss of quality, by providing an anchor flange in integral relationship with a metal pickguard of the guitar or bass guitar. Extended through the anchor flange a... | 02/15/1983 |
| 4373608 | Tuned sound barriers A tuned sound barrier for machines which radiate sound primarily at a few constant, discrete frequencies includes an array of mechanical resonators distributed over the surface of a sound barrier. Each resonator of the array is tuned to present a high mec... | 02/15/1983 |
| 4373607 | Loudspeaker cone stiffeners An improved loudspeaker cone construction and method of improving performance comprises the use of one or more stiffener columns positioned across and attached to a loudspeaker cone at points intermediate small and large ends of the cone. A plurality of s... | 02/15/1983 |
| 4373418 | Tuning fork mounting assembly in electromechanical pianos An electromechanical piano of the type incorporating asymmetrical tuning forks. To increase vastly the dwell of the forks in the high-pitched range of the piano, a fork-mounting construction is employed wherein only a single screw is associated with each ... | 02/15/1983 |
| 4369357 | Race computer This computer device provides a system for selecting the winners of both horse and dog races, and it consists primarily of a stationary card, having a circular area, in which is imprinted the weights of the horses and dogs, as indicated on track programs.... | 01/18/1983 |
| 4369457 | Reverse polarity differential encoding for fringe field responsive electro-optic line printers The input data samples for a fringe field responsive electro-optic line printer are differentially encoded and the polarity of the differentially encoded data is periodically reversed, thereby reducing the number of electrodes such a printer requires to a... | 01/18/1983 |
| 4368799 | Straight-through flow muffler A straight-through flow muffler (10) is shown. A cylindrical housing (11) has an inlet (13a), an outlet (14a), and a pair of axially aligned, longitudinally spaced tubes (15, 16) extending from the inlet and outlet into the center of the muffler housing. ... | 01/18/1983 |
| 4367808 | Silencer A silencer for exhaust gases from combustion engines comprises a perforated pipe (1) provided with an inlet (2) and an outlet (3). Arranged in the interior of the pipe (1) are intermediate walls (12,13,14) provided with through-flow openings (15,16). Exte... | 01/11/1983 |
| 4366882 | Sound room A sound room having sound wave reflective front and side walls, and ceiling and a sound absorbent floor and rear wall arranged to form a wedge shaped room. Sound generating speakers are positioned at the upper front wall forming the small end of the wedge... | 01/04/1983 |
| 4365881 | Photographic camera with timepiece A photographic camera having an integral timepiece includes a case adjustable between an open condition for use as a camera capable of recording data and a collapsed condition in which the camera elements are concealed from view and only an external time ... | 12/28/1982 |
| 4364648 | Safety device of auto-focusing point adjusting camera In an automatic focusing device for a camera lens, a safety device is provided for insuring that the camera lens will be focused when a coincident auto-focusing point signal is not produced. A movable focus adjustment member for focusing the lens has a fi... | 12/21/1982 |
| 4364071 | Electrographic recording In an electrographic recorder of the type wherein a dynamic toner bridge is formed between a rotating shell and a permeable strip positioned a predetermined small distance from the periphery of the shell, to define a recording station, means are provided ... | 12/14/1982 |
| 4362222 | Arrangement for damping and absorption of sound in rooms An acoustical system for damping and absorption of sound in rooms to provide a sound damping even at very low frequencies, e.g. 50 Hz, and simultaneously improve speech comprehension in the entire room by reduction of the resonance time. The acoustic abso... | 12/07/1982 |
| 4362223 | Sound absorbing device Apparatus for damping a sound field propagating in a fluid propagation medium within a channel (1) having a closed cross-section periphery, including at least one but preferably a plurality of lattice members (2) spaced within the channel (1), each of the... | 12/07/1982 |
| 4362925 | Voting machine An improved voting machine particularly suitable for use in harsh environments is disclosed which features a control box which is operated by an election official individually activating the machine before each vote is cast. The control box may be dispose... | 12/07/1982 |
| 4361752 | Calculator and apparatus for macrophotography An apparatus for macrophotograph comprising a camera, an electronic flash unit having a variable power output, a bracket for connecting the electronic flash unit to the camera in such manner that an angle formed between an axis passing through a lens of t... | 11/30/1982 |
| 4361206 | Exhaust muffler including venturi tube A muffler comprising a housing having inlet and outlet ends and having a venturi tube of smaller diameter than the housing disposed therewithin in communication with its outlet end is disclosed. The venturi comprises a first bell reducer, which reduces th... | 11/30/1982 |
| 4360075 | Low back pressure exhaust silencer for diesel locomotives An exhaust silencer especially for turbo-charged diesel locomotives with a single exhaust outlet combines a straight through exhaust duct preferably diverging to recover velocity pressure and minimize back pressure with dual silencing means including a la... | 11/23/1982 |
| 4359134 | Sound suppressor for fluid flow lines A compact low-resistance muffler for reducing sound levels generated by the pulsatile flow of fluids as, for example, at the intake of a compressor or the exhaust port of an internal combustion piston engine. The muffler or suppressor comprises a pair of ... | 11/16/1982 |
| 4359136 | Muffler construction A muffler construction comprising an outer body, and a pair of end walls extend transversely across the body to define an internal chamber. An inlet conduit is located in one of the end walls, while an outlet conduit is in the other end wall. In one embod... | 11/16/1982 |
