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    • 3. 发明专利
    • LIQUID LEVEL DETECTING DEVICE
    • JPH10185659A
    • 1998-07-14
    • JP34149996
    • 1996-12-20
    • SONY CORP
    • KONDO SATORUSUGIKI HIROSHI
    • G01F23/30G01F23/36G01F23/56H01H35/18
    • PROBLEM TO BE SOLVED: To provide a liquid level detecting device for detecting the liquid level of a highly viscous liquid. SOLUTION: A float ball 5 is held by a base 3 through a spring 5, and a plate 6 formed of an elastic body and a rigid plate 7 opposed thereto with a prescribed space are provided above the float ball 4. A switch 8 is fixed to the top end of the plate 7. Such a constituted body is sealed by a cover 9a formed of a flexible membrane member, and a detecting circuit 10a is provided on the outside of the cover 9a. When a liquid 2 in a liquid tank 1 is increased, it pushes up the float ball 4 from the outside of the flexible cover 9a, the float ball 4 consequently pushes up the plate 6 to close the switch 8, and a signal corresponding to this state is outputted from the detecting circuit 10a, whereby the liquid level is detected is in a position where the float ball 4 is set. Since the detecting part is covered with the cover 9a, it never makes contact with the liquid, and the operating performance of the constituting member can be regularly kept constant.
    • 7. 发明专利
    • TAPE LOADING MECHANISM
    • JPS62231449A
    • 1987-10-12
    • JP7376586
    • 1986-03-31
    • SONY CORP
    • KONDO MASAYUKISUGIKI HIROSHI
    • G11B15/665
    • PURPOSE:To move two loading members in opposite directions by providing a drive section to every loading member and arranging is projection so that one of a 1st or a 2nd absorbing part is arranged in-phase and the other with a phase shift by a half pitch. CONSTITUTION:In supplying a current to exciting coils 42, 43 so as to converge a magnetic flux to projections 33 shifted by 1/4 pitch in the mobile direction among four projections from two drive sections, the projections of loading members 9, 10 are moved to a position in complete opposition to the projections 33, the loading members 9, 10 are moved by 1/4 pitch in the mobile direction and in this state, any of the three projections other than the projection converged by the magnetic flux among the four projections of the drive sections 14, 15 is opposed in a phase deviated by 1/4 pitch in the mobile direction. Thus, the current is supplied to the exciting coils in the changeover timing where the magnetic flux is converged on one projection deviated by 1/4 pitch in the mobile direction at that point of time.
    • 8. 发明专利
    • TAPE LOADING MECHANISM
    • JPS62226462A
    • 1987-10-05
    • JP6908686
    • 1986-03-27
    • SONY CORP
    • KONDO MASAYUKISUGIKI HIROSHI
    • G11B15/665
    • PURPOSE:To make a complicated drive part unnecessary and to facilitate the moving and positioning of a loading member by providing a projection delayed by a half pitch and a drive part having a coil so that they confront with plural projections installed on the outer periphery of the loading member. CONSTITUTION:Plural supporting rollers 11 support the circular band-like loading member 9 by tilting with respect to a chassis 2. Suction yokes 22 and 23, magnets 34 and 35 and exciting coils 36 and 37 comprise a drive part 21, and projections 30-33 on the suction surface and the plural projections on the member 9 are located so that they can be confronted and driven reversely. According to a loading command fluxes are concentrated on the projection 10 and the confronted suction surfaces among four suction surfaces, ad move counterclockwise by quater the pitch. Accordingly a drive means such as a speed reducing machine is made unnecessary, whereby a simple structure can move the loading mechanism and its positioning can be facilitated.
    • 9. 发明专利
    • TRACKING CONTROLLER
    • JPS6292155A
    • 1987-04-27
    • JP23201985
    • 1985-10-17
    • SONY CORP
    • SUGIKI HIROSHIYAMADA MAKOTO
    • G11B15/467
    • PURPOSE:To apply tracking control accurately over the entire range of tracking servo by changing the speed of a rotating body for a prescribed quantity for a prescribed time from the operation start. CONSTITUTION:A speed control means 54 is provided in parallel with a switch 55 and a DC power supply provided between a sample-and-hold circuit 32 and an adder 50 and consists of a DC power supply 56 whose potential is set within the tracking servo locking range, a switch 57 changing over DC power supplies 56, 57, a flip-flop circuit 58 generating a signal changing over the switches 55, 57, and a counter 59 reset by a signal S2, generating a signal '1' when the 2nd sampling pulse SP2 is detected for a specified number of times, e.g., twice or 4 times during one revolution of a drum and setting the flip-flop circuit 58. The switches 55 and 57 are thrown to the position of a contact (a) at the leading of the tracking servo and thrown to the position of a contact (b) when the 2nd sampling pulse SP2 is detected twice or 4 times during one revolution of the drum and the flip-flop circuit 58 is set.
    • 10. 发明专利
    • Digital signal recorder and reproducing device
    • 数字信号记录器和复制设备
    • JPS6173224A
    • 1986-04-15
    • JP19451484
    • 1984-09-17
    • Sony Corp
    • ODAKA KENTAROSATAKE TOMOJISUGIKI HIROSHIYAMADA MAKOTOMIYAMORI SHINJIOMORI TAKASHI
    • G11B5/588G11B15/467
    • PURPOSE: To always stably feed a prescribed quantity of offset, by constituting a digital signal recorder and reproducing device in such a way that, at the time of a special reproducing mode, the tracking control can be performed by offsetting a prescribed quantity from the normal reproducing time by the detecting output of pilot signals from both adjacent tracks and one track being scanned at one side during the 1st rotating period and the other side during the 2nd rotating period.
      CONSTITUTION: When an area AT
      1 is scanned by means of a head in a special reproducing mode, closstalks of pilot signals PB
      3 and PB
      1 and a pilot signal PA
      1 are detected. If the sum of the signals PA
      1 and PB
      1 is divided into two equal parts and the one part is subtracted from the signal PB
      3 , the S-curve characteristic shown by the solid line (a) in the figure is obtained. When the head scans a track 5B
      1 , tracking control along the S-curve characteristic shown by the solid line (a) is performed. Namely, the head scans the track 5B
      1 by offsetting by 45° from the normal reproducing mode.
      COPYRIGHT: (C)1986,JPO&Japio
    • 目的:通过构成数字信号记录器和再现装置来始终稳定地馈送规定量的偏移量,使得在特殊再现模式时,可以通过将规定量与正常值相抵消来执行跟踪控制 通过检测来自两个相邻轨道的导频信号的检测输出和在第一旋转周期期间在一侧扫描的一个轨道和在第二旋转周期期间的另一侧来再现时间。 构成:当以特殊的再现模式通过头扫描区域AT1时,检测导频信号PB3和PB1和导频信号PA1的闭锁。 如果信号PA1和PB1的和被分成两个相等的部分,并且从信号PB3中减去一个部分,则获得图中实线(a)所示的S曲线特性。 当头扫描轨道5B1时,执行沿着实线(a)所示的S曲线特性的跟踪控制。 即,头部通过偏移45度来扫描轨道5B1。 从正常再现模式。