Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 4804395 | Electrode arrangement for lensing method A system is provided for positioning a pair of electrodes on either side of the end portion of an optical fiber extending through a contact, to establish an arc through a cross-aperture in the contact and across the fiber to melt the fiber into a lens, wh... | 02/14/1989 |
| 4798431 | Optic fiber contact An optic fiber connection system is provided which enables the forming of a lens or bead at the end of an optic fiber by an electric arc established between a pair of electrodes, which avoids degradation of the electrodes with use. The contact has a forwa... | 01/17/1989 |
| 4799212 | Circuit for controlling two signals approximately 90 degree apart in phase This control circuit adjusts two signal waveforms to a phase difference of exactly 90° and to exactly equal amplitudes of the respective frequency components. It is a digital circuit containing a phase control stage (pr) and an amplitude control stage (a... | 01/17/1989 |
| 4798441 | Fiber optic device coupling A coupling for connecting an optical fiber cable to an electro-optical device which is suitable for both single and multi-channel applications. The coupling utilizes a standard connector contact which is releasably mounted in the coupling by means of a co... | 01/17/1989 |
| 4796299 | Video encoder apparatus A line rotation encoder for use with cable or pay television systems includes a storage unit having a storage capacity large enough to store only a single digitized video horizontal line of information, an address counter coupled to the storage unit and s... | 01/03/1989 |
| 4793474 | Controlled delivery agricultural capsule and method of making A capsule for the controlled release of an active material, e.g. into soil, is described. The capsule comprises an insoluble tubular housing (11) containing a number of water soluble or biodegradable partition walls (13) defining one or more hermetically ... | 12/27/1988 |
| 4791406 | Monolithic integrated digital-to-analog converter A monolithic integrated digital-to-analog converter makes use of rotating current-source control (dynamic element matching). After the conversion of a digital input signal into a code containing a sequence of first binary conditions corresponding to the n... | 12/13/1988 |
| 4789897 | Frequency converting apparatus for converting an RF television signal to a video signal employing low IF techniques A frequency converter circuit for television signals is disclosed which contains a tuner and a low-IF converter which converts the television signal to a low IF signal to obtain adjacent-channel selectivity with low-pass filters. The low-IF converter furt... | 12/06/1988 |
| 4783732 | Two-wire/three-port RAM for cellular array processor A multiport memory includes first and second signal lines. Each signal line can simultaneously and independently access a particular address during a read memory portion of a clock pulse whereas both signal lines are used to write data to one address duri... | 11/08/1988 |
| 4783633 | Pulse-edge coincidence detector and use of same for selecting a sampling signal An integrable circuit arrangement for deriving a coincidence pulse on coincidences of the falling edges of pulses of a digital data signal with the falling edges of pulses of sampling signals obtained by frequency division and gating and intended for use ... | 11/08/1988 |
| 4782385 | Frequency conversion of an RF signal transmitted for color-television receivers The frequency conversion of an RF signal is performed by the "third method" using a suitable frequency reversal which makes the frequencies of the picture carrier, the chrominance subcarrier, and at least one sound carrier appear transformed into the base... | 11/01/1988 |
| 4778774 | Process for manufacturing a monolithic integrated circuit comprising at least one bipolar planar transistor The invention includes a method of manufacture of monolithic integrated VLSI circuits comprising bipolar transistors whose base regions are contacted in a self-aligned manner in proximity to the respective emitter regions by the use of silicide layers. Th... | 10/18/1988 |
| 4778406 | Electrical connector A connector is disclosed for making electrical connection between a wire and a cable in which the conductor of the cable is offfset from the center axis of the cable. The connector comprises a contact having a pointed spike on its front face which is offs... | 10/18/1988 |
| 4775829 | On-chip voltage stabilizing circuit In order to substantially suppress the noise of an integrated constant-voltage source, an integrated circuit includes an RC low-pass filter having its capacitor connected between an external chip terminal and an external ground, while the remainder of the... | 10/04/1988 |
| 4763297 | Monolithic integrated digital circuit including an internal clock generator and circuitry for processing multi-digit signals A monolithic integrated digital circuit including at least one circuit for the serial data processing of multi-digit data signals synchronized to a clock system, the serial data processing circuits using a clock signal coming from a clock oscillator which... | 08/09/1988 |
| 4760542 | Delay circuit for digital signals A digital delay arrangement generates a delay time which is a noninteger multiple of the period of a system clock frequency. The arrangement includes a digital delay circuit having a delay time equal to the period, a multiplier for the part of the noninte... | 07/26/1988 |
| 4758386 | Wave-shaped AC arc for lensing system A system is provided for forming an end of an optical fiber into a lens, using a high frequency AC electric arc of predetermined frequency, which avoids the creation of harmonic frequencies that could degrade the finished lens. An arc is established betwe... | 07/19/1988 |
| 4757390 | Video recorder with a magnetic recording medium in the form of a tape To raise the integration level of a video recorder, and to provide a uniform circuit concept suitable for all three color-television standard (PAL, NTSC, SECAM) which, in particular, requires only slight modifications for adaptation to the respective stan... | 07/12/1988 |
| 4755203 | Optic fiber positioning for lensing method A system is described for forming a lens at the end of an optical fiber which extends through a hole in a contact, so the tip of the lens lies at a desired lens position located a predetermined distance rearward of the tip of the contact. The fiber is fix... | 07/05/1988 |
| 4751355 | Pushbutton switch with combined restoring-tactile feel spring A pushbutton switch having a contact actuating member movable in the direction of actuation, and a restoring spring which is loaded when the actuating member is depressed. A laterally resiliently deflectable detent element engages an inclined cam surface ... | 06/14/1988 |
| 4751576 | Digital circuit for classifying the frequency of a signal in frequency ranges The frequency of a signal is classified in at least two nonoverlapping frequency ranges using the variable frequency of a clock signal as a reference. The clock signal is applied to the count input of a first up counter, and the signal to the reset input ... | 06/14/1988 |
| 4750158 | Integrated matrix of nonvolatile, reprogrammable storage cells In an integrated matrix of nonvolatile, reprogrammable storage cells, additional memory is provided to replace defective rows of storage cells. The addresses of the defective rows are stored in a region of the matrix. A correction register can be loaded w... | 06/07/1988 |
| 4748503 | Data reduction circuit with a differential pulse code modulator for video signals A data reduction circuit employs a differential pulse code modulator for input video signals where the time-critical loop includes a loop subtractor (s2), a quantizer (q), and a loop delay element (v3), so that differential pulse code modulation can be pe... | 05/31/1988 |
| 4743283 | Alternating current arc for lensing system and method of using same A system is provided for forming an end of an optical fiber into a lens, which produces a lensed fiber having an especially smooth lens surface and high strength near the intersection of the lens and the rest of the fiber. A lens is formed by establishing... | 05/10/1988 |
| 4742253 | Integrated insulated-gate field-effect transistor circuit for evaluating the voltage of a node to be sampled against a fixed reference voltage The circuit merely comprises three transistors, namely one transfer transistor (t) arranged between the input (e) and the output (a), a load transistor (l) connected as a resistor, and a clamping transistor (k), with both of the latter connecting the outp... | 05/03/1988 |
| 4735580 | Test adapter for integrated circuit carrier A test adapter is provided for connection to a PLCC (Plastic Leaded Clip Carrier), hereinafter referred to as a carrier, which assures accurate alignment with the carrier, which can be locked to the carrier during a test, which has a width only slightly g... | 04/05/1988 |
| 4736334 | Circuit for calculating the value of a complex digital variable The circuit arrangement includes a basic circuit for calculating the zeroth approximation and expandable by at least one correction circuit for calculating a first or further approximations. The basic circuit contains a first adder, a second adder, a firs... | 04/05/1988 |
| 4734597 | CMOS inverter chain A CMOS inverter chain includes the alternating series connection of N- and P-inverters. An N-inverter is a conventional type of CMOS inverter employing an N-intermediate transistor between both the P- and the N-transistor; a P-inverter, however, is a CMOS... | 03/29/1988 |
| 4733393 | Test method and apparatus for cellular array processor chip A cellular array processor chip includes a common bus communicating with the individual cells thereof. The common bus can be monitored during chip testing to detect the presence, or absence, of a defective cell. Each cell can be inactivated with respect t... | 03/22/1988 |
| 4733394 | Electrically programmable semiconductor memory showing redundance An integrated memory system includes a microcomputer which, at defined intervals and by employing a classifying circuit integrated in an EEPROM, checks the memory cells of the EEPROM with respect to variations of the threshold values. Upon detection of a ... | 03/22/1988 |
| 4729014 | Digital circuit for steepening color-signal transitions This circuit arrangement is designed for use in digital color-television receivers or the like and contains for each of the two digital color-difference signals a slope detector to which both a digital signal defining an amplitude threshold value and a di... | 03/01/1988 |
| 4729028 | Television receiver with multipicture display The output signal of one tuner or of other TV signal sources in the base band are digitized and stored in a part of a memory. After automatic switching over to another TV-channel, this new signal is stored in another part of the memory and so on. The whol... | 03/01/1988 |
| 4724511 | Dielectric compositions A dielectric composition comprising a base of non-stoichiometric lead magnesium niobate, non-stoichiometric lead zinc niobate, lead zirconate, titanium dioxide and bismuth titanate, together with a further oxide additive, in particular nickel oxide, manga... | 02/09/1988 |
| 4721905 | Digital phase meter circuit To determine the phase difference between the edge of a pulse of a first clock signal and the edge of a pulse of a second clock signal with an integrable phase meter circuit, the second clock signal is fed through a frequency-divider circuit to the input ... | 01/26/1988 |
| 4721228 | Apparatus for dispensing elongated small mechanical parts A system for dispensing components one-at-a-time upon demand for utilization comprises a component handling assembly and a buffer assembly. The component handling assembly receives bulk quantities of the components and when activated, properly orients eac... | 01/26/1988 |
| 4722084 | Array reconfiguration apparatus and methods particularly adapted for use with very large scale integrated circuits An array reconfiguration apparatus is employed in large integrated circuits and large systems. The apparatus makes use of spare wires and/or computation elements which are incorporated in the array. The apparatus uses spare wires in place of defective wir... | 01/26/1988 |
| 4718928 | Quick access contact mounting fixture A fixture is provided which enables the rapid mounting of an optical fiber contact with its forward end at a predetermined position and orientation with respect to arc-creating electrodes. The fixture includes a frame with a vertical slot having a width g... | 01/12/1988 |
| 4712860 | Retrofittable optic fiber contact assembly An optic fiber contact assembly is described, which can be installed in a contact hole of a connector housing that was designed for holding front release electrical contacts. The assembly includes a central tube which holds the end of an optical fiber, an... | 12/15/1987 |
| 4713828 | Data reduction circuit In this circuit, the subcircuits substantially contributing to the computation time of the time-critical loop are only a subtracter, a quantizer and a delay element. The digital video signals whose number of bits is to be reduced can thus have clock rates... | 12/15/1987 |
| 4712021 | Cmos inverter An inverter has two transistors driven via two capacitors. The dc operating point of the transistors are set by means of currents derived from the output currents of a reference current source. This gives identical delays for the positive and negative pul... | 12/08/1987 |
