Device for recovering video information from magnetic tape

Claim 1

A device for recovering video information from magnetic tape comprising: an assembly including magnetic heads and having a current-carrying casing formed with a bottom, walls and a cover, said magnetic heads being arranged within said casing in a manner allowing rotation and coupling thereof to said magnetic tape through a slot in one of said walls; a hollow shaft secured to said current-carrying casing and mounting said magnetic heads; a slip ring enclosed within said casing and having a rotor and stator each of which includes a closed core and a winding wound on said core, said winding of said rotor being electrically coupled to said magnetic heads; a current-carrying element arranged within said shaft and connected to said bottom and said cover so that the current-carrying element, said cover, said walls and said bottom form a closed three-dimensional turn coupling said windings of said rotor and said stator; a step-up transformer electrically coupled to said winding of said stator; a first reproduction signal correcting circuit electrically coupled to said step-up transformer; a reproduction amplifier having an input and an output, said input being connected to the first reproduction signal correcting circuit; a second reproduction signal correcting circuit connected to said output of said reproduction amplifier; a short-circuited turn consisting of a first and a second portion, the first portion of said turn being arranged within said current-carrying casing and the second portion thereof arranged beyond said current-carrying casing, said short-circuited turn being inductively coupled to the second reproduction signal correcting circuit and having a lower inductance as compared to the closed three-dimensional coupling turn; a subsequent reproduction signal shaping channel having an input connected to the output of said reproduction amplifier.

Claim 2

A device for recovering video information from magnetic tape comprising: an assembly including magnetic heads and having a current-carrying casing formed with a bottom, walls and a cover, said magnetic heads being arranged within said casing in a manner allowing rotation and coupling thereof to said magnetic tape through a slot in one of said walls; a hollow shaft secured to said current-carrying casing and mounting said magnetic heads; a slip ring enclosed within said casing and having a rotor and stator each of which includes a closed core and a winding wound on said core, said winding of said rotor being electrically coupled to said magnetic heads; a current-carrying element arranged within said shaft and connected to said bottom and said cover so that the current-carrying element, said cover, said walls and said bottom form a closed three-dimensional turn coupling said windings of said rotor and said stator; a step-up transformer electrically coupled to said winding of said stator; a first reproduction signal correcting circuit electrically coupled to said step-up transformer; a reproduction amplifier having an input and an output, said input being connected to the first reproduction signal correcting circuit; a second reproduction signal correcting circuit connected to said output of said reproduction amplifier; a short-circuited turn consisting of a first and a second portion, the first portion of said turn being arranged within said current-carrying casing and the second portion thereof arranged beyond said current-carrying casing, said short-circuited turn being inductively coupled to the second reproduction signal correcting circuit and having a lower inductance as compared to the closed three-dimensional coupling turn; a subsequent reproduction signal shaping channel having an input connected to the output of said reproduction amplifier.