Abstract: A main circuit portions are arranged in the order of a breaking section fixed-side conductor, a breaking section movable-side conductor, a disconnecting section movable-side conductor, and a disconnecting section fixed-side conductor, and first and second grounding conductors are respectively provided for grounding the breaking section fixed-side conductor and the disconnecting section fixed-side conductor at both end portions of the apparatus. The arrangement of operating devices is set in the order of a first grounding-section operating device, a breaking-section operating device, a disconnecting-section operating device, and a second grounding-section operating device. In addition, a breaking section is supported by a single supporting insulator to reduce the number of creepage insulation portions.

Abstract: A disk cartridge storage and retrieval apparatus includes a stocker vertically disposed in a housing for storing a multitude of disk cartridges. An information recording and reproducing device is disposed in the housing in a vertically aligned relation with the stocker for recording and reproducing information onto or from a disk received in a disk cartridge. A guide shaft is vertically disposed in the housing and has an upper end thereof fixedly secured to an upper portion of the housing and a lower end thereof held free to move. A carrier mechanism is supported on the guide shaft for vertical movement therealong for transporting a disk cartridge between the stocker and the information recording and reproducing device. A vertical drive mechanism including a motor and an endless belt drives the carrier mechanism in a vertical direction along the guide shaft.

Abstract: A disk cartridge loading/unloading system which loads or unloads disk cartridges into or from a container in which the disk cartridges are housed. The disk cartridge includes a cartridge holder, an open/close cover, and a drawing member. The cartridge holder is capable of rotating between a store position of the disk cartridge in the container and an unloading position for unloading the disk cartridge, and is also capable of retaining the disk cartridge. The open/close cover, rotatably attached to the front end of the cartridge holder, closes an opening for a disk entrance when the disk cartridge is in the store position. The drawing member is provided in such a manner that one end of the drawing member is pivotally connected to the open/close cover, and the other end of the drawing member has a stop click for drawing the cartridge. As the open/close cover is rotated, the drawing member is caused to shift toward the front end of the cartridge holder.

Abstract: A disc file apparatus which holds a cartridge at both surfaces thereof through a slit formed from an open end to a closed end of a bill-like-shaped cartridge holder, clamps by clampers the cartridge at both lateral sides thereof, and renders the axis of rotation of a pick-up and discharge mechanism shifted from the center of gravity thereof so as to regulate rotation of the cartridge holder by a stopper in a range of an angle of 180.degree., whereby when the catridge is turned over or even when the same is subjected to an impact from the exterior, the cartridge is reliably held so that there is no fear that the rotational position thereof is shifted.

Abstract: An inserting and retrieving mechanism of a "Juke Box" type disc memory device includes a movable body which has pushing members adapted to push a cartridge into a stocker or a recording and reproducing device of the disc memory device and a pair of clampers adapted to pull out the cartridge from the stocker or recording and reproducing device in association with engaging recesses formed on the cartridge, a driving means for opening and closing the clampers through a toggle means arranged symmetrically about the driving means, a first position sensor provided on the inserting and retrieving mechanism for detecting a position of a rear end of the cartridge when it reaches a position in which the clampers are ready to clamp the cartridge and a second position sensor provided in the stocker and/or the recording and reproducing device for detecting a position of a front end of the cartridge when it reaches a position in which the cartridge is ready to be released.