Video head driving unit with nonlinear leaf spring force

Details Video head driving unit with nonlinear leaf spring force Video head driving unit with nonlinear leaf spring force

1981-09-08

1984-05-01

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 77, G11B 2118, G11B 552

Patent

active

044464975

ABSTRACT:
In a video head driving unit having a rotary drum and a stationary drum, a horizontal yoke is secured to a leaf spring having a non-linear spring which is in turn connected to the rotary drum for rotation therewith. Video transducer heads are respectively mounted on the opposite ends of the yoke. The yoke is resiliently pivotally tiltable about an axis transverse thereto by an electromagnetic arrangement in response to a control signal so that the video heads are displaced in vertical position as they rotate with the rotary drum during "trick play mode". The leaf spring and yoke are so arranged that they are disengaged from each other at one of the diametrically opposite positions when the yoke is pivotally moved beyond a predetermined range of tilt angles, whereby the leaf spring exerts a non-linear spring force against the yoke to provide a higher tension to the yoke when same is pivotally moved within the range than when same is pivotally moved beyond the range.

REFERENCES:
patent: 3995317 (1976-11-01), Schmidt
patent: 4151569 (1979-04-01), Hathaway
patent: 4236185 (1980-11-01), Obremski
patent: 4314284 (1982-02-01), Sato et al.
patent: 4365279 (1982-12-01), Kinjo

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