Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4133416 | Electric cord winder An electrical cord winder comprises a mechanical section and an electrical section. The mechanical section includes a rotatable cord drum rotatably journalled on a hollow journal secured at one end to a frame, the drum being axially retained between the f... | 01/09/1979 |
| 4131524 | Manufacture of semiconductor devices A method of manufacturing a semiconductor device comprising the steps of providing a plate-shaped semiconductor body, removing by spark erosion a first portion of the semiconductor body, and then using a selective etching process to remove only a second p... | 12/26/1978 |
| 4129042 | Semiconductor transducer packaged assembly A semiconductor transducer chip is flip-chip bonded to a semiconductor interface chip, which is mounted on the ceramic package. Thermal coupling between the package and the transducer chip is minimized by the small contact area between the transducer chip... | 12/12/1978 |
| 4127864 | Semiconductor device A semiconductor device having a bipolar transistor of the lateral type, preferably a pnp-transistor which is provided in a homogeneously doped semiconductor layer and which may be provided both in an n-type and in a p-type semiconductor layer and of which... | 11/28/1978 |
| 4124934 | Manufacture of semiconductor devices in which a doping impurity is diffused from a polycrystalline semiconductor layer into an underlying monocrystalline semiconductor material, and semiconductor devices thus manufactured A method of manufacturing a semiconductor device in which a layer of polycrystalline material having a high impurity concentration is used prior to the diffusion of a thin region having strong surface concentration and prior to providing a contact to the ... | 11/14/1978 |
| 4125418 | Utilization of a substrate alignment marker in epitaxial deposition processes An alignment marker on a substrate surface is covered with polycrystalline semiconductor material during the growth of an epitaxial layer on the monocrystalline substrate. This polycrystalline material is then removed with a selective etchant to re-expose... | 11/14/1978 |
| 4124933 | Methods of manufacturing semiconductor devices A method of manufacturing a semiconductor device in which a masking layer is formed on part of the surface of a deposited layer of relatively high resistivity polycrystalline semiconductor material present on an insulating layer provided at a surface of a... | 11/14/1978 |
| 4124417 | Method of diffusing impurities in semiconductor bodies A method of diffusing doping impurities in semiconductor bodies by the transfer in the vapor phase from a source in a condensed form. The diffusion space is of the "half-open type" and a cold point is maintained in it at the end opposite to the location of the... | 11/07/1978 |
| 4123772 | Multisegment Hall element for offset voltage compensation A semiconductor device having a Hall element in which, in order to reduce the offset, the Hall element consists of an even number of sub-Hall elements provided in one semiconductor body and the anode and cathode contacts of which are connected together, w... | 10/31/1978 |
| 4122540 | Massive monolithic integrated circuit In an integrated circuit, a semiconductor body having a surface, spaced semiconductor circuits formed in the body, intercoupling means formed in the body adjacent each of said circuits, and connected to said circuits. A plurality of conductive paths are f... | 10/24/1978 |
| 4121135 | Apparatus for interfacing with plasma type display panels In a plasma type display panel of the type having a plurality of parallel row and parallel column electrical conductors forming an array of matrix cross points for providing discrete discharge and light emitting sites upon selection and addressing one or ... | 10/17/1978 |
| 4119744 | Method of manufacturing semiconductor devices in which a layer of semiconductor material is provided on a substrate A method of manufacturing semiconductor devices comprising a layer of semiconductor material, comprising the steps of providing a strip-shaped solid substrate having a main surface and providing a solid support having a substantially horizontal surface an... | 10/10/1978 |
| 4119483 | Method of structuring thin layers A method of structuring oxide layers, nitride layers or magnetic layers in such manner that a photolacquer mask is manufactured on a substrate and the layer to be structured is provided by means of cathode sputtering both on the photolacquer mask and on t... | 10/10/1978 |
| 4116795 | Sensor device Sensor for measuring the oxygen concentration in the exhaust gases of combustion engines, in which zirconium oxide is used as active material. The improvement relates to a composite filter so that the response is great and the contamination at the same ti... | 09/26/1978 |
| 4112563 | Color display tube and method of manufacturing same A method of making a color selection electrode for a color television display tube in which apertured electrodes are placed in contact with metallic coatings on opposite sides of an insulating foil and diffusion bonded thereto by heat and pressure, and th... | 09/12/1978 |
| 4112511 | Four transistor static bipolar memory cell using merged transistors A bipolar memory cell of reduced size requires only four I2 L operated transistors and three access lines. Two current injection transistors supply operating current to two inversely operated flip-flop transistors and also function as load devi... | 09/05/1978 |
| 4109630 | Breakerless electronic ignition system An electronic ignition system for an internal combustion engine having a timing signal source comprising an oscillator for providing a carrier signal; an electronic network connected to the oscillator and including a sensor means for providing a reactance... | 08/29/1978 |
| 4104085 | Method of manufacturing a semiconductor device by implanting ions through bevelled oxide layer in single masking step Method of manufacturing a semiconductor device, in particular a capacitance diode, a zener diode or an avalanche diode, by using only one masking step. According to the invention, a first masking layer, for example a silicon oxide layer, is provided on a ... | 08/01/1978 |
| 4101779 | Apparatus for mechanically supporting a medical device in a plane Apparatus comprising a parallelogram which is movable in one plane and which is formed by a first and a second coupling rod and a part of a first and a second supporting rod for a medical device and a counterweight therefor, respectively. The coupling rod... | 07/18/1978 |
| 4101883 | Keyboard A keyboard for a physiological measuring system, comprising a group of location indication buttons which are arranged on an image of, for example, the heart at locations which correspond to feasible measuring positions. Furthermore, there are preferably p... | 07/18/1978 |
| 4101344 | Method of manufacturing a semiconductor device In Locos N-channel MOST-IC's underpasses can be obtained below the locos pattern by performing, at the area where the underpasses are to be formed, an As or Sb implantation prior to providing the locos. By using the nitride mask as an implantation mask, t... | 07/18/1978 |
| 4099646 | Housing and cover retaining means Retaining means that are integrally formed as a part of a housing and its associated cover. Two U-shaped extensions are formed as part of the housing while two oppositely facing tabs are formed on extensions of the cover. The oppositely faced tabs slide i... | 07/11/1978 |
| 4100409 | Device for analyzing a surface layer by means of ion scattering A device for analysing a surface layer by means of ion scattering. The device comprises an energy selector having two coaxial cylindrical electrodes. A primary mono-energetic ion beam impinges upon the surface layer and its axis coincides with the axis of... | 07/11/1978 |
| 4100436 | Current stabilizing arrangement A current stabilizing arrangement includes a first and a second current circuit or path in which currents with a mutually fixed ratio are maintained. These currents respectively flow through the series connection of a first semiconductor junction in serie... | 07/11/1978 |
| 4100427 | Device for converting solar energy A device is described for converting solar energy into electric power for a load, which device is provided with photocells and electric accumulators. Switching means are provided which at least during starting of the load connect this load to the output t... | 07/11/1978 |
| 4097747 | Device for measuring absorption of radiation in a slice of a body In third-generation computer tomography apparatus measuring values must be intermediately stored partly for the total scanning time in order to enable processing of all measuring values with a given projection angle. This involves high expenditures for st... | 06/27/1978 |
| 4095104 | Electron microscope In an electron microscope having a comparatively high resolution, a tilting motion about a point in an object to be imaged is imparted to the illuminating electron beam in order to adjust the coherence of the exposure of an object. For the exposure apertu... | 06/13/1978 |
| 4090389 | Method of drawing a shadow mask A method of drape drawing a shadow mask from a foraminous, or apertured, metal sheet that has a greater tensile in one direction than another and has edges extending in the one direction. During the drape procedure, the edges of the sheet that extend subs... | 05/23/1978 |
| 4090195 | Anti-burglar mini-radar An anti-interference Doppler effect mini-radar includes a generator of pure microwaves, and a receiver for receiving reflected microwaves and coupled to the generator for detecting and demodulating the transmitted and reflected microwave signals. The demo... | 05/16/1978 |
| 4087367 | Preferential etchant for aluminium oxide A method of etching aluminium oxide and/or cleaning aluminium surfaces with an etchant consisting of a solution of a fluoride in an organic solvent, which solution is substantially free from hydrofluoric acid and unbound water.... | 05/02/1978 |
| 4085235 | Method of manufacturing a cathode-ray tube A suspension comprising electrically conductive material, a binder, and from 3% to 30% by weight of sodium carbonate or potassium carbonate is applied to a wall portion of a cathode-ray tube and then dried and fired. This provides a layer in which hardly ... | 04/18/1978 |
| 4083098 | Method of manufacturing electronic devices A method of manufacturing an electronic device, comprising a plurality of closely spaced conductive layers on a substrate, said method comprising the steps of depositing said substrate a layer of polycrystalline semiconductor material, providing at least ... | 04/11/1978 |
| 4082985 | Gas discharge flash lamp with piezoelectric trigger generator An electronic flash unit for igniting a gas discharge flash lamp by means of a piezoelectric element. The unit input terminals are interconnected by a series circuit comprising a rectifier and an undercritically damped parallel LC circuit. The lamp starti... | 04/04/1978 |
| 4081793 | Device for reading out the charge condition of a phototransistor A device for reading out the charge condition of a phototransistor by means of sampling pulses, for example read out of a transistor to be selected from a matrix of phototransistors, a voltage which is a measure of said charge condition being taken from t... | 03/28/1978 |
| 4080719 | Method of manufacturing a semiconductor device and device manufactured according to the method A method of manufacturing a metal silicide pattern with respect to which two electrode zones are to be provided in a self-registering manner. According to the invention the pattern is provided in the form of a layer of polycrystalline silicon and, by sele... | 03/28/1978 |
| 4081707 | X-ray rotating-anode tube with a magnetic bearing X-ray tubes with a magnetic bearing either have the disadvantage that the anode must be at earth potential, so that an asymmetric high-voltage supply is required or that -- in the case of a symmetric high voltage -- a relatively wide air gap is necessary ... | 03/28/1978 |
| 4080632 | System and method for facsimile framing A facsimile system incorporating an up-down counter to achieve framing between a facsimile transmitter and a facsimile receiver. The facsimile receiver initially has a sweep rate different from a standard sweep rate. The up-down counter counts the facsimi... | 03/21/1978 |
| 4078177 | Layer-wise reproduction of three-dimensional objects by simultaneous super-position of encoded images A method of layer-wise reproduction of three-dimensional images by way of a number of simultaneously recorded, encoded superposition images of different image planes. The object is irradiated from different directions. Simultaneous-superposition images of... | 03/07/1978 |
| 4077899 | Gettering device of manufacturing a color television display tube while using said gettering device, and color television display tube thus manufactured The chemical resistance of a gettering device comprising a mixture of barium-aluminium powder and nickel powder compressed in a metal holder is considerably increased by using nickel powder having a specific surface smaller than 0.15 m2 per gra... | 03/07/1978 |
| 4078244 | Semiconductor device A semiconductor device having two transistors which have a common collector. The device is characterized in that the distance between the two base zones is such that during operation of the device the depletion zones of the base-collector junctions merge ... | 03/07/1978 |
