公开(公告)号：DE60336282D1

公开(公告)日：2011-04-21

申请号：DE60336282

申请日：2003-01-10

Applicant: HEWLETT PACKARD CO

Inventor： FASEN DONALD J ,  HOEN STORRS T

IPC: G01B7/00 ,  G01D5/241 ,  H01J21/08

公开(公告)号：SG106111A1

公开(公告)日：2004-09-30

申请号：SG200206768

申请日：2002-11-08

Applicant: HEWLETT PACKARD CO

Inventor： DONALD J FASEN

IPC: B81B5/00 ,  B81B7/02 ,  G11B9/10 ,  H01J21/08 ,  H02N1/00 ,  H02B1/00

Abstract: An electrostatic drive 150 having a plurality of mover electrodes 152 operatively secured to a mover 154, and a plurality of stator electrodes 156 operatively secured to a stator 158. The mover 154 and stator 158 are configured to move relative to each other via electrostatic force generated between the mover electrodes 152 and the stator electrodes 156. The electrostatic drive 160 includes a driver configured to place the stator electrodes 158 in any of a number of sequential voltage states, each being defined by a combination of LO and HI voltage levels at the individual stator electrodes 156. Transition from one voltage state to a sequentially adjacent voltage state produces a step size of relative movement between the mover 154 and stator 158. For each of the sequential voltage states, the driver 160 is further configured to selectively vary voltage applied at one of the stator electrodes 156 to an amount between the LO and the HI voltage levels, in order to produce a proportionally smaller step size.

公开(公告)号：FR1226908A

公开(公告)日：1960-08-18

申请号：FR69039499

申请日：1959-06-09

Applicant: PATELHOLD PATENTVERWERTUNG

IPC: H01J21/08

公开(公告)号：DE1011531B

公开(公告)日：1957-07-04

申请号：DEL0020464

申请日：1954-11-23

Applicant: LORENZ C AG

Inventor： LIEB DIPL-ING ALBERT

IPC: H01J21/08

公开(公告)号：FR1062611A

公开(公告)日：1954-04-26

申请号：FR1062611D

申请日：1952-06-23

Applicant: CHROMATIC TELEVISION LAB

IPC: H01J21/08 ,  H04N9/24

Abstract: 718,652. Colour television. CHROMATIC TELEVISION LABORATORIES, Inc. June 24, 1952 [June 29, 1951], No. 15833/52. [Also in Group XXXV] In a colour television receiver wherein a scanning cathode-ray beam is arranged to impinge a phosphor target so as successively to develop light in the component colours, a first signal is generated indicative of the rate of repetition of a single selected component colour and compared in phase with a second signal indication of an optimum rate of colour repetition in the selected colour to develop a control signal representation of any difference therebetween, the control signal being applied substantially to eliminate the difference. In one arrangement the control signal is applied to modify the beam scanning velocity. In other arrangements the control signal is applied to modify both the beam scanning velocity and the rate at which the colour signals are applied to modulate the beam. In a first detailed embodiment, Fig. 6, the target of cathoderay tube 11 comprises phosphor strips in the sequence red, green, blue, green &c. which are scanned in a raster with the line direction transverse the strips. Located behind each blue strip is an electrode 33 which intercepts a small portion of the scanning beam and provides a pulse signal on a common connection 36. As the beam scans the target, a pulse series appears on connection 36 indicating the actual rate of scanning. Incoming red, blue and green colour signals appear in separate channels 43, 44, and 45 and are applied to the cathode-ray tube grid 18 through gate stages 75, 75', 75" which are opened in the sequence of scanning the colour phosphors by an oscillator 80 operating at a frequency determined by the optimum rate at which the colours are to be reproduced. Diodes 93 and 93' comprise a phase discriminator circuit to one input of which is applied the oscillator output and to the other input of which is applied the output of an amplifier 98 receiving the pulse series from connection 36. Any difference in phase between the two inputs results in a change of potential at point 100, the potential controlling a reactance tube stage 107 connected across the tuned circuit 85, 86 of the oscillator. Any difference between the actual and optimum rates of colour reproduction therefrom resu'ts in a change in the rate in which the colour signals are gated through to the cathoderay. tube in order to eliminate the difference and a velocity correction is also applied to the line scanning circuit (not shown), a potential to effect this correction being derived from across resistor 90 in the anode circuit of the oscillator. In another detailed embodiment, Fig. 7 (not shown), the oscillator tuned circuit is formed with a saturable reactor and the output of the phase discriminator is applied to control the frequency by means of an additional winding on this reactor. In a third embodiment, Fig. 5 (not shown), the reactance stage controls the line scanning circuit directly. In a fourth embodiment, Fig. 4 (not shown), the output of the phase discriminator circuit controls only the line scanning circuit. As an alternative to using a cathode-ray tube having internal electrodes to detect the passage of the beam over the blue phosphor strips, an external photo-electric cell may be employed in conjunction with an appropriately coloured filter, Fig. 8 (not shown). The electrodes 33 may be more widely spaced than shown in Fig. 6. In Fig. 6 the sequence of colour reproductoin is such that green repeats at twice the rate of either of the other colours and in order to gate the colour signals through in the same sequence it is necessary to open gate 75 11 attwice the rate of the others. This is effected by applying the output of oscil'ator circuit 80 to gate 75 and 75' directly and to gate 75" through a frequency doubling stage 125. To avoid colour contamination when the scanning beam momentarily impinges two phosphors whilst traversing from one to the other, the beam may be keyed at a high frequqency so as to be effective only when the beam impinges the centre of each strip. By this means, it is also possible to maintain a low intensity beam in the absence of signals in order to preserve a pulse output signal in electrodes 33 or the photo-tube in the arrangement of Fig. 8.

公开(公告)号：CH265966A

公开(公告)日：1949-12-31

申请号：CH265966D

申请日：1947-07-22

Applicant: CSF

Inventor： FIL COMPAGNIE GENERALE DE TELE

IPC: H01J1/20 ,  H01J21/08

公开(公告)号：FR953224A

公开(公告)日：1949-12-02

申请号：FR953224D

申请日：1947-09-19

IPC: H01J21/08

公开(公告)号：GB618973A

公开(公告)日：1949-03-02

申请号：GB2679546

申请日：1946-09-06

Applicant: BENDIX AVIAT CORP

IPC: H01J21/08 ,  H04R23/00

Abstract: 618,973. Gramophone pick-ups. BENDIX AVIATION CORPORATION. Sept. 6, 1946, No. 26795. Convention date, Sept. 10, 1945. [Class 40 (ii)] [Also in Groups XXXIX and XL (a)] An electromechanical transducer of the thermionic valve type is characterised by a flexible wall supporting a movable electrode, the compliance of the wall in one plane being greater than in any other plane. As shown, a gramophone pick-up comprises a thermionic valve in which the stylus moves the grid to vary the current through the valve. The valve has four pins, two for supplying alternating current to the heating filament, one for connecting earth to the cathode and one for connecting a positive potential to the anode. The screen grid 30 is carried by a post rigidly connected to a thin diaphragm 28 and connected to the stylus 37 engaging the record. The diaphragm may be corrugated to increase the compliance laterally. To reduce vibration pick-up, the vertical compliance may be increased by mounting the stylus on a horizontal leaf spring 58, Fig. 7, or (Fig. 8, not shown) on a U-shaped leaf spring.

公开(公告)号：FR934647A

公开(公告)日：1948-05-27

申请号：FR934647D

申请日：1946-10-04

Applicant: CSF

IPC: H01J21/08

公开(公告)号：GB595615A

公开(公告)日：1947-12-10

申请号：GB495045

申请日：1945-02-27

Applicant: ALBERT HORACE ATHERTON

IPC: H01J21/08 ,  H01J25/24

Abstract: 595,615. Temperature-responsive actuating- elements. ATHERTON, A. H. Feb. 27, 1945, No. 4950. [Class 64 (ii)] [Also in Groups XXXVI and XL] A thermally - responsive device for moving an element within an evacuated or gastight vessel comprises two bowed strips 14, 15 arranged to move the element in opposite directions when heated, the strips being heated by electron bombardment from cathode 27. The emission to each strip is controlled separately by control grids 28, 29. The strips are connected to fixed rod 22 and movable rod 24, and are interconnected by a frame 18. When strip 14 is heated, a downward movement is communicated to rod 24 through frame 18 and strip 15; when strip 15 is heated an upward movement of rod 24 occurs without waiting for the cooling of the other strip. In another form, differential electronic heating of two short rods, Fig. 2 (not shown), causes angular movement of a lever arm supported across their tops and carrying the actuating rod 24. According to the Provisional Specification, heating may be accomplished by means other than electron bombardment, for example by resistance heating coils.