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    • 6. 发明专利
      IT1047519B  未知
    • IT1047519B
    • 1980-10-20
    • IT5141475
    • 1975-09-19
    • BALDWIN CO D H
    • C03C17/34 , H01L21/00 , H01L31/0336 , H01G
    • A method of making low cost photovoltaic cells on a large scale basis by means of a continuous process of coating sheet glass while the sheet glass moves in and has its under surface immersed in a tank of molten material, comprising forming the film of CdS microcrystals on the glass sheet, which has previously been coated with transparent SnOx to a thickness of about 0.3 to 0.6 microns. A water solution of a cadmium salt, a sulphur compound, and an aluminum containing soluble compound is intermittenty sprayed on said glass while its exposed surface is maintained at a constant temperature in the range 500 DEG F to 1100 DEG F and while irradiating the surface with intense ultraviolet light so as to form a film of CdS microcrystals. This CdS film has Al impregnated within the stratum of the film adjacent to the SnOx, but only optionally has Al impregnated in the stratum of the CdS film adjacent to the exposed surface of the CdS film. After the spray process is completed, the temperature of the sheet of glass is brought to the range 450 DEG C to 550 DEG C, 525 DEG being optium. After heating, the glass is cooled to approximately room temperature and the exposed surface of the CdS is converted to CuxS, the x of CuxS being as close to 2 as possible, by dipping the coated glass in a solution comprising: a solvent, which may be water; a weak acid, such as tartaric acid, citric acid, or lactic acid; a copper containing compound; and, optionally, a quantity of H2Ce(SO4)4 and NaCl, or some other chloride; or by electroplating to form a film of CuxS; or, by a combination of dipping and electroplating. The CuxS forming process proceeds by ion exchange, i.e., S from CdS combines with Cu to form CuxS. Cu is then applied over the CuxS, and the cell is cured at a temperature in the range 400 DEG F to 500 DEG F.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 7. 发明专利
      CA1066930A TONE SIGNAL MODULATION SYSTEM 未知
    • TONE SIGNAL MODULATION SYSTEM
    • CA1066930A
    • 1979-11-27
    • CA254386
    • 1976-06-09
    • BALDWIN CO D H
    • BUNGER DAVID A
    • G10H1/00 , G10H1/043 , G10H1/02
    • Modulation systems for electrical signals representing music in which synchronous vibrato and tremolo modulations are applied to a flute signal in one channel, the vibrato being produced by a bucket brigade modulator and the tremolo by a balanced modulator in cascade with the bucket brigade modulator, and in which in a second channel tones other than flute tones, and pedal tones, are separately treated to have independent vibratos, and in which balanced modulators for modifying the amplitude of the tone signals are concurrently controlled by a common expression voltage. In one modification flute signals are vibrato modulated in opposed phases, and passed via diverse filters to a common tremolo modulator. Provision is made for combining the inputs of the channels, the outputs of which are electroacoustically transduced by separated loudspeakers. Provision is made for slowly varying the frequency of a sub-sonic modulating oscillator, which is either turned off, or operates at about 1 Hz. or about 6. Hz., in proceeding from any one of these three values to any other, the rate of variation being such as to simulate the rate which occurs when the modulations are produced by rotation of a mechanical device such as a rotating loudspeaker.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 8. 发明专利
      CA998545A ELECTRONIC MUSIC SYSTEM 未知
    • ELECTRONIC MUSIC SYSTEM
    • CA998545A
    • 1976-10-19
    • CA173071
    • 1973-06-04
    • BALDWIN CO D H
    • BUNGER DAVID A
    • G10H1/043 , G10H1/053 , G10H1/06 , G10H1/22 , G10H5/00 , G10H5/04
    • 1439957 Electronic musical instrument D H BALDWIN CO 15 June 1973 [16 June 1972] 28671/73 Heading G5J An electronic musical instrument comprises keys 2, voltage control oscillator 9, means 7 for deriving a control voltage which is a function of the tone of the key of highest pitch of a group of keys actuated concurrently, means 8 for applying said voltage after a predetermined time interval to allow for failure of simultaneity of actuation of the keys, and means for acoustically transducing the tone signals derived from said oscillator. Actuation of a key of higher pitch than is already activated on keyboard 2 causes said control voltage to be passed by voltage divider 3 to storage means (not shown) in sample and hold circuit 8, the voltage being connected to V.C.O. 9 after a 20 ms. delayed gating pulse is generated by note played detector 7. Releasing the key of highest pitch similarly provides a 40 ms. delay followed by a further 20 ms. second delay during which time the control voltage is sampled again. Circuit 8 allows for a smooth variation of the stored voltage for legatissimo playing, or a stepwise variation for staccatissimo playing. Square wave oscillations corresponding to the control voltage are output from V.C.O. 9 to the frequency dividers 10. The tones from the lower octaves of frequency dividers 10 are filtered by voice filters 11 which simulate one or more brass instruments; including voltage controlled flatting and subsequent brightening of the tones within a modulating envelope. The tones from the higher octaves are filtered by flute filters 12, one per octave, and passed to gates 14 (providing controllable sustain) and 15 (providing fixed, short sustain). Tones are also passed to wave shaper 22 which receives signals from noise generator 21 and gating signals from note played detector 7 as well, to generate various, selectable waveforms, e.g. shortened pulses, sawtooth waves. Output from wave shaper 22 passes to voltage controlled filter 13 providing low pass, band pass and high pass characteristics selectively. Vibrato effects are supplied to V.C.O. 9 and gating voltages are supplied to mode selector 19 by the low frequency modulation oscillator 20 which can be set in both a random and non-random mode, the latter mode using signals from noise generator 21. The mode selector 19 provides trigger pulses to various circuits along the control signal lines of Fig. 1. Tone signals from conventional tone generators 1 are switched via keys 2 to voicing circuit 4 which colours the tones before they are amplified by preamplifier 17 and amplifier 5 and transduced by loudspeaker 6 along with the tones from filters 11, 13 and gates 14, 15. Expression shoe 18 is used to control the effect of filters 11, 13 on the harmonic content of the tones and to vary the gain of preamplifier 17. The various modes selectable by selector 19 are reiteration, percussion, normal (continuous), fast attack, slow attack and sustain. Details of the various circuits indicated by the function boxes of Fig. 1 are described.
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