A stack of cartridges carried by springs in a housing has its bottom cartridge playable by a tape player through a slot in a housing wall. Two parallel racks movable in opposite directions have end projections to push cartridges. One projection removes the top cartridge of the stack for subsequent play and simultaneously the other projection inserts a new bottom cartridge between the springs and the stack for play.

Improvements are provided in an apparatus for transporting a vertically oriented record card carrying a magnetic stripe across a transducer head for recording and playback functions. The improvement is in the form of a chassis system for mounting mechanical and electrical components of the card transport apparatus which can be readily molded in a single operation. The chassis is a unitary structure which includes a deck joined to a battery compartment. An integral upstanding flange on the deck f...

A modular servo track writer machine with linear positioning for recording information on computer disk packs; the machine including a self-contained modular positioner with a screw-detent type mechanism which positioner is adapted for ready removability and replacement in the machine baseplate assembly and which modular positioner is self-aligning relative to the access mechanism; the access mechanism being a self-supporting unit with a carriage overhanging the head supporting tower on the side...

A tape recorder utilizing a tape cassette is disclosed which eliminates the tape slack between supply reel and take-up reel. When the tape cassette is placed in the play position, the supply reel is first rotated in the backward direction to remove the tape slack. Then the take-up reel is started to rotate by the stretched tape. A detecting device is provided to detect the rotation of the take-up reel in the backward direction. The detecting device triggers a control device which in turn switche...

High speed contact duplicating of a magnetic copy tape from a magnetic master tape is effected by a pair of pinch rollers for pressing the tapes together and into adhesion contact such that the air is squeezed from between the tapes and they adhere together until forcibly separated, and transfer excitation means immediately downstream from the pinch rollers to cause printing of the copy tape with minimum opportunity for shearing motion of the tapes relative to one another. The path of the tape d...

A recording tape cassette storage unit comprising a container and a slide cover, the slide cover being substantially biplanar to enclose the top and front of the cassette storage container, one edge of the cover being wrapped around the back wall of the container and the other edge being wrapped around the floor of the container to limit displacement of the cover relative to the container to a lateral sliding displacement.

Apparatus for controlling the tension in a web transported between first and second reels, first and second drive motors being mechanically coupled to the first and second reels, respectively, to effect a direct reel-to-reel drive whereby the web is transported therebetween. The current drawn by the armature of the first motor, proportional to the torque generated thereby, is monitored and applied to the armature of the second motor as a biasing current, the polarity of which is determined by th...

A multiple magnetic tape duplicating apparatus is provided for simultaneously recording information from a master tape on a plurality of slave tapes, which comprises a playback assembly for alternately transporting a master tape, preferably having at least two tracks in a forward and reverse direction, including a pair of transducer heads adapted to pick-up recorded information from one track of said master during forward operation and from the other track during reverse operation; and a pair of...

Electrical apparatus for use in combination with record transducing apparatus of the type which moves a record medium past a fixed position for operative contact with a record or reproducing transducer, which electrical apparatus is comprised of audio reproducing circuitry as well as predetermined control tone reproducing circuits in coaction with tape drive logic and control circuitry; such tape drive control circuitry particularly including circuits for sensing tape drive condition to derive a...

Information signals are redundantly processed by an apparatus which utilizes two channels, each channel having at least one shift register. A first block of information signals is loaded into one shift register at one clock rate. It is then read out and re-loaded into the same shift register at a second higher clock rate. It is then read out a second time at the higher clock rate. A second block of information signals is similarly processed in the corresponding shift register in the other channe...