摘要:
In an optical reproducing apparatus including an optical pickup device directing a light beam at a record medium surface and having at least one photodetector which produces a focus error signal in accordance with the state of focus of the light beam in respect to the record medium surface, and a focus control device responsive to a drive signal for controlling the focus of the light beam in respect to the record medium surface; there are provided a signal generator for producing a preliminary focusing signal which initially varies rapidly toward a first predetermined level of one polarity and then varies relatively slowly toward a second predetermined level of opposite polarity; a detecting device for detecting a zero crossover point of the focus error signal and producing an output signal which varies from a first level to a second level when the zero crossover point is detected; and switching circuitry for supplying the preliminary focusing signal to the focus control device as the drive signal for the latter when the output signal of the detecting device is at its first level and supplying the focus error signal to the focus control device as the drive signal for the latter when the output signal of the detecting device is at its second level.
摘要:
An optical disc player comprising a preliminary focus control circuit for repeatedly effecting preliminary focus control to bring a focusing control circuit arrangement for a beam of light falling on a disc into a mode of focus control operation, and detecting means for detecting an abnormal operation in the preliminary focus control, wherein an instance in which the disc is improperly loaded with the beam of light falling on a non-information-recorded surface thereof can be detected on the basis of an output signal from the detecting means.
摘要:
A disc player for reproducing an information signal from a rotating disc having record tracks defined by successive turns of a spiral signal path in which the information signal is recorded, which is adapted to perform a small scale track jump operation for rapidly moving the reading position determined by a pick-up device in the direction transverse to the spiral signal path on the disc to a relatively short distance repeatedly in the fast forwarding or fast reversing mode and is so arranged that the number of times of the small scale track jump operation performed repeatedly for a certain period in the fast reversing mode is larger than the number of times of the small scale track jump operation performed repeatedly for the same certain period in the fast forwarding mode, whereby the substantial moving distance measured along the spiral signal path in respect of the reading position by the pick-up device moved for the certain period in the fast forwarding mode coincides with or closes to the substantial moving distance measured in the same manner in the fast reversing mode.
摘要:
A device for rapidly moving an optical pick-up device in an optical reproducing apparatus to a desired position on a record disc having a plurality of record tracks with an information signal recorded therein, includes a tracking error signal generating circuit for producing a tracking error signal corresponding to deviation of the pick-up device from the center of each record track; a drive device for moving the pick-up device in a direction transverse to the record tracks; and a track jump signal forming circuit for producing a track jump signal comprised of a drive signal followed by a brake signal, in response to the tracking error signal, the drive signal having a duration corresponding to the number of tracks traversed by the pick-up device and the brake signal having a duration corresponding to the speed of movement of the optical pick-up device in traversing the tracks, and for supplying the track jump signal to the drive device to control the latter to rapidly move the optical pick-up device in a direction transverse to the record tracks to the desired position.
摘要:
A coater (1) includes: a droplet jet part (4) which ejects droplets of a first solution toward an object to be coated (2) to apply the droplets to the object to be coated (2); and a remoisturizing-drying part (6) which gives a residue of the first solution applied on the object to be coated (2) a solvent capable of dissolving the residue to form an applied body with a second solution containing the residue as a solute, and which dries the formed applied body with the second solution.
摘要:
The present invention aims at making it possible to easily fill liquid into a droplet spraying and applying head module, while saving work. The droplet spraying and applying head module includes a droplet spraying and applying head and a tank. The droplet spraying and applying head includes a liquid chamber for containing liquid and a plurality of nozzles communicating with the liquid chamber, and sprays droplets through the nozzles The tank contains liquid to be supplied to the liquid chamber, and communicates with the liquid chamber. The droplet spraying and applying head and the tank are coupled to each other with a coupling member. A revolute joint is interposed between the coupling member and the droplet spraying and applying head.
摘要:
A flame retardant is provided which has excellent dispersibility in resin ingredients and can give flame-retardant resin moldings excellent in flame retardancy and mechanical properties. The flame retardant comprises magnesium hydroxide particles, a higher fatty acid, preferably stearic acid, bonded to part of the surface of the magnesium hydroxide particles, and a silicone oil having reactivity bonded to that surface part of the magnesium hydroxide particles which does not have the higher fatty acid bonded thereto.
摘要:
A resectoscope apparatus includes a high-frequency generating device which generates high-frequency current, a hollow sheath which can be inserted in the celom, a scope which is arranged in the sheath and which can observe the celom, an active electrode which transmits the high-frequency current to the body organ, and a solution supply device which supplies a solution to the hollow sheath. At least one of the sheath and the scope has conductivity. The sheath or the scope having the conductivity is connected to high frequency generating device via a connecting member so as to collect return current.
摘要:
A surgical instrument for fastening together opposing portions of a body organ. The instrument comprises a first support for supporting the first opposing portion of the body organ, a second support opposing the first support, for supporting the second opposing portion of the body organ, and a displacement-preventing member connected to the first or second support for preventing the supports from displacing relative to each other. The member comprises a pin protruding from one of the supports and a hole formed in the other of the supports. The pin is made of thermoplastic resin. When heated, the pin is softened and deformed, whereby the first and second supports are secured to each other, fastening together the opposing portions of the body organ.
摘要:
A reel leg fixing device is made up of a tubular main body 3 provided with a first reel leg receive portion 2 and fittable loosely onto a rod 1, a support portion 4 disposed on one side portion of the tubular main body 3 and extended in the longitudinal direction of the rod 1, a partially cylindrical engaging receive portion 6' fitted loosely onto the rod 1, and a fastening tubular member 8' fitted loosely onto the rod 1, provided with a second reel leg receive portion 7 and fittable with the engaging receive portion 6'. The fastening tubular member 8' is designed to fasten the engaging receive portion 6' onto the rod 1 to adjust the fixing position of the reel leg and to fix the reel leg to the rod positively.