摘要:
A tracking device is disclosed. When a target track is indicated by indicating means, the head is shifted toward the target track. During this time, prior to the detecting the signal for a position of the target track, the signals for the adjacent positions to the position of the target track on either side are detected, and, after that, the signal for the position of the target track is detected. Based on the outputs of these positions, discriminating means determines the position to which the head is tracked relative to the recording medium.
摘要:
In a colorimetric sensor having a plurality of color sensors each of which is composed of a photo-electric conversion element for converting light into an electrical signal and a color filter added to the photo-electric conversion element for transmitting light of a specific wave length region, each of the color sensors is composed of a plurality of polygonally split pieces radially extending and spreading from a central part of the colorimetric sensor. A color sensor of a relatively low sensitivity has a greater number of split pieces than others. Among these color sensors, a color sensor having the lowest sensitivity has its split pieces either partially or totally disposed in a position covering two sides of an angular corner part of the colorimetric sensor.
摘要:
A recording and/or reproducing apparatus in which a head is driven along a disk while the disc is rotated. A rotation speed control and a rotation phase control are provided to control the disc rotation. The apparatus is operated in a phase control mode until the phase of the disc rotation deviates from a reference phase by a predetermined amount. Then the apparatus switches to speed control. A memory is used to store data concerning start up information to reduce the required amount of start up time required in future operations.
摘要:
A vibration-damping material with excellent workability consisting of two metal plates and a vibration-damping layer of a thermoplastic resin interposed between the two metal plates, in which the vibration-damping layer of a thermoplastic resin consists of a film as a middle layer and a polyolefin type resin (B) provided on both sides of the film as an upper and lower layer, the film as the middle layer being composed of (1) at least one resin (A) selected from the group consisting of polyolefin type resins and ionomer resins each having a modulus of elasticity in shear at 20.degree. C. of 3.times.10.sup.9 to 1.times.10.sup.7 dyne/cm.sup.2, a percentage of elongation at 20.degree. C. of 50% or above and a peak temperature of dissipation factor (tan .delta.) of -120.degree. C. to 80.degree. C. or (2) a resin mixture of the resin (A) and a synthetic rubber having a percentage of elongation at 20.degree. C. of 100% or above and a peak temperature of dissipation factor (tan .delta.) of -120.degree. to 50.degree. C., and the polyolefin type resin (B) having a modulus of elasticity in shear at 20.degree. C. larger than that of the resin (A), a percentage of elongation at 20.degree. C. of 10% or above, a peak temperature of dissipation factor (tan .delta.) of -40.degree. to 180.degree. C. and a bonding strength toward the metal plates at 20.degree. C. and 180.degree. -peeling of 3 kg/cm or above.
摘要翻译:一种具有优异的可加工性的减振材料,由两块金属板和一块热塑性树脂构成的隔热层之间夹在两块金属板之间的隔热层组成,其中热塑性树脂的减震层由一层作为中间层的薄膜和 设置在作为上下层的膜的两面上的聚烯烃类树脂(B),作为中间层的膜由(1)至少一种选自聚烯烃类树脂和 各自具有在20℃剪切下的弹性模量为3×10 9至1×10 7达因/ cm 2的离聚物树脂,20℃下的伸长百分比为50%或更高,并且散热因子(tanδ)的峰值温度为 120℃〜80℃或(2)树脂(A)和20℃下的伸长率为100%以上的合成橡胶的树脂混合物和峰值温度(tanδ delta)为-120〜50℃,聚烯烃类树脂 (B)在20℃下的剪切弹性模量大于树脂(A)的弹性模量,20℃下的伸长率为10%以上,耗散因子峰值温度(tanδ) -40℃至180℃,并且在20℃下对金属板的粘结强度和3kg / cm 3以上的180°剥离。
摘要:
A recording apparatus having a recording head for recording video signals on a magnetic disc as the disc rotates, comprises a servo motor, a circuit for generating a feedback signal representing the rotating state of the servo motor, a head moving member for changing over the recording position of the recording head relative to the magnetic disc, and a control circuit for performing a first sequence of controlling the rotating state of the servo motor in response to the feedback signal and a second sequence of controlling the moving state of the head moving member time-dividedly in response to generation of the feedback signal, so that the apparatus is constructed without the necessity of using a standard timing generating source solely used for controlling the movement of the head.
摘要:
A still picture transmission apparatus in which still picture data is transmitted in packet form from a central terminal having a picture data bank selectively to a plurality of local terminals through a common transmission line at which a plurality of distinct logic channels are established, wherein a packet transmission is conducted in such a manner that a command designating a channel number is transmitted to a desired local terminal to which channel the local terminal is to be connected, and still picture data is transmitted with the use of the packet having said channel number.
摘要:
An infrared radiation absorbing film suitable for agricultural purposes comprising a first layer of olefin resin containing an amorphous hydrated aluminosilicate gel and optionally, additional layers of an olefin resin encompassing said first layer.
摘要:
A display device in which display elements 21 are arranged in matrix form to provide a screen, and pictures, characters and animations can be displayed while being edited as desired. The display device comprises: a video data memory 8; a graphic data memory 9; a blanking data memory 10 for blocking the output of the video data memory for every display element; and a video mode memory (11), a graphic mode memory (12) and a blanking mode memory (13) which block the outputs of the video data memory (8), the graphic data memory (9) and the blanking data memory (10), respectively, for each of a plurality of areas which collectively form the entire area of the display screen.
摘要:
An agricultural plastic film improved in retention of infrared radiation which comprises an olefin resin film produced by forming a composition comprising 100 parts by weight of an olefin resin (A) and 2 to 25 parts by weight of a compound oxide (B) comprising SiO.sub.2 and at least one member of the oxides of metals selected from Groups II, III and IV of the periodic table, the ratio of the refractive index (n.sub.A) of said olefin resin to that (n.sub.B) of said compound oxide, n.sub.A /n.sub.B, being within a range of 0.99 to 1.02, into film.
摘要:
Disclosed is a method for continuous extrusion coating of a hollow core material with a highly expanded polyolefin resin, which is characterized by subjecting an extruded molten mass of an expandable polyolefin resin to external cooling at the point at which said molten mass begins to foam and supplying said hollow core material with the surface temperature thereof kept below the softening point of said polyolefin resin for thereby enhancing the fastness of adhesion of the highly expanded polyolefin foam with the hollow core material and at the same time facilitating the release of the two materials thus joined.