摘要:
In a drive apparatus for a tape recorder which has a pair of spaced apart selectively driven wheels, for example, of supply and take-up reel bases, respectively, a drive wheel located between the driven wheels and adapted to be selectively rotated in forward and reverse directions by means of an electric motor for effecting rotation of an idler wheel which continuously engages the drive wheel, and a pivotally mounted support arm rotatably carrying the idler wheel and being swingable between a first position where the idler wheel bears against one of the driven wheels for driving the latter from the drive wheel and a second position where the idler wheel bears against the other of the driven wheels for driving such other driven wheel from the drive wheel; a magnetic non-contacting coupling is provided between the idler wheel and the support arm so as to yieldably resist relative rotation thereof and thereby cause reliable swinging of the support arm to its first and second positions in response to rotation of the drive wheel in its forward and reverse directions, respectively.
摘要:
In a tape cassette with a housing including top and bottom walls having respective pairs of spaced apart openings aligned with each other, a pair of hubs disposed rotatably within the housing between the walls and being accessible through the respective aligned openings for selectively driving the hubs of the cassette, and a magnetic tape wound on a cylindrical circumferential surface of an outer peripheral portion of each of the hubs; each of the hubs includes an annular rib radially inward from the outer peripheral portion and projecting axially beyond opposite flanks of the outer peripheral portion of the hub so as to extend rotatably around annular flanges directed axially inward from the respective aligned openings of the housing walls, and a pair of lubricating sheets are disposed against the inner surfaces of the housing walls and each have a pair of ridges or beads projecting therefrom and a pair of holes located between the ridges and through which the annular flanges on the adjacent wall extend with the annular rib of each hub engaging flat surface portions located between the holes and ridges of the sheets while the ridges of the lubricating sheets are engageable with the flanks of the outer peripheral portions of the hubs for accurately guiding the wound tape in the axial direction of the hubs.
摘要:
A tape cassette comprises a tape guide having a cylindrical surface formed by hard chromium plating or nickel plating. The tape guide is a cylindrical plate having a slit parallel to the axis. The cylindrical tape guide has a groove at one end of the guide and is fitted to a post having a projection mounted on a half-case under connecting the groove of the guide to the projection of the post to contact the tape with the surface formed by the hard chromium plating or nickel plating.
摘要:
The spools of a tape recorder are rotated to wind the tape in one direction or the other using a single motor. A reversible lever carries two friction wheels, one on either side of its pivot, and a band runs round these wheels and a driving pulley on the axis of the motor. The friction wheels are each mounted close to one of the spools. The lever is mounted so that it can pivot on its axis with less friction than there is in the bearings of the friction wheels, so that when the band reverses its direction of movement, the lever pivots to bring a different one of the friction wheels to bear against its respective spool, whereupon that spool is driven by friction between it and the friction wheel.
摘要:
A mechanism by which more than one torsion spring can be serially coupled to a member to impart a torque thereto equivalent to that from a single spring having the same number of turns as the total turns of the coupled springs. The springs to be coupled are connected at one end to respective storage shafts which are mounted to a free floating coupling arm. The coupling arm rotates about a shaft coaxial with the member to which the other ends of the springs are attached. In a capstan driven web system having a take-up reel and a supply reel, two sets of serially coupled negator springs are utilized to maintain proper web tension during driving of the web system.
摘要:
The present invention relates to a cine-projector so designed as to carry out the motion picture projection, the still picture projection, the quick film feeding as well as winding up by simultaneously controling the first clutch mechanism for selectively interrupting the engagement of the driving ower transmission mechanism with the feeding shaft rotated by means of the driving power of a motor rotating along a single direction through the driving power transmission mechanism by means of the translation mechanism to be translated at least into three positions in functional engagement with the operation mode change over mechanism for changing over the operation mode of the cine-projector, the second clutch mechanism for selectively interrupting the engagement of the driving power transmission mechanism with the winding up shaft rotated along the inversed direction as that of the above mentioned feeding shaft by means of the driving power of the above mentioned motor through the driving power transmission mechanism, the first control mechanism for controling the efficiency of the mechanism for intermittently feeding the film at the projection part and the second control mechanism for controling the binding mechanism for semi-compulsorily binding the film at the projecton part.
摘要:
A drive device for a tape recorder by which the recording tape is drawn off one spool by means of a capstan, and is wound-up on another spool, which is driven over a friction coupling by a motor with a speed not substantially above the highest required winding speed, with a drive device driven by the same motor, the drive device for the purpose of fast rewinding being selectively coupleable on one of the two spools. The two drive gears are arranged on a swingable carrier arm driven continuously in oppsite working directions by a stationarily arranged motor via a belt. By swinging the carrier arm in opposite operating directions out of a neutral center position, the drive gears are coupleable from time to time with one of the spool-carrying winding spindles for fast rewinding. One of the drive gears, which is coaxially seated over a friction clutch, is connected with another drive gear of smaller diameter, the latter in a neutral center position of the carrier arm being able to be brought into engagement with still another drive gear by means of an axial movement of one of these other drive gears, said still another drive gear being coaxially seated on the winding spindle which carries the spool which in the play-operation serves as the winding-up spool.
摘要:
A supply spindle for a cassette recorder which includes means for reducing the abrupt start-up forces to which the recording tape within the cassette is subjected by incrementally coupling the inertial mass of the supply spindle to the tape upon start-up. The supply spindle includes a shaft carrying a supply head for engaging a cassette spool. The supply head is axially as well as rotationally movable upon the shaft. A coil spring, fixed to the shaft and supply head, urges the head to the end of the shaft. Additionally, the spring rotatably biases the supply head against a stop carried on the shaft. Initially upon start-up, only a portion of the mass of the supply spindle is coupled to the magnetic tape with the full mass being subsequently coupled thereto.
摘要:
A magnetic recording tape cartridge of a Phillips type which comprises a slip sheet for assuring uniformity of the winding of a tape pack on a hub, said slip sheet being provided with at least three embossed convex ribs of special material radially extended with respect to a pair of drive shaft inserting holes, each of said ribs having closed ends said ribs being disposed on the slip sheet in the positions and the directions specially defined so as to prevent fluctuation of the hub and the tape pack during winding the magnetic recording tape in said cartridge.
摘要:
An endoscope has within the forward end section of a sheath a cassette loaded with a roll of film on which a body cavity of a human being is photographed. One end of a film take-up shaft on the cassette outwardly extends from a housing of the cassette and a pulley is fixed on the outer periphery of the extending end portion of the film take-up shaft. A string is wound around the pulley. The string is inserted through a single passage in the sheath and when the string is pulled by an operator at a control section the film is wound.