Camera apparatus for recording data in a film magnetic recording layer
AssigneeEastman Kodak Company
InventorGilbert E. Kammerer
Life of this patent
Estimating the term…
Abstract
In a camera, data is recorded onto a film magnetic layer by anhysteretic recording with a device comprised of a planar master medium attached to a ring core, the core a magnetic field gap formed therein at the point at which it is attached to the master medium. A slightly underdamped L/C resonant circuit is formed with excitation windings on the core to provide an alternating bias field to the master medium to effect the anhysteretic recording of the master data onto the film magnetic layer. Provision is made to ensure intimate contact between the master medium and the film magnetic layer while the film is stationary during the recording process.
Claims8
Camera apparatus for recording data on a film magnetic recording layer comprising:
- a magnetic recording device located in the camera including a first element comprising a master medium bearing data magnetically pre-recorded thereon and a magnetic second element adapted to provide a bias field to the first element in response to an applied electrical stimulus;
- and
- circuit means coupled to said second element for providing an electrical stimulus to said second element to generate a gradually decaying alternating bias field to effect anhysteretic recording of said pre-recorded data from said master medium onto said film magnetic recording layer.
Apparatus for recording data on a film magnetic recording layer in a camera comprising:
- an anhysteretic recording device bearing magnetically pre-recorded data and positioned adjacent a film exposure gate in the camera;
- and
- means for activating said device at a time when film is stationary in the camera to effect anhysteretic recording of said pre-recorded data onto said film magnetic recording layer.
Camera apparatus for providing magnetically recorded data on film of the type having a magnetic recording layer thereon, the apparatus comprising:
- an anhysteretic magnetic recording device located in the camera including a first element bearing pre-recorded magnetic data and a second element in magnetic contact with the first element for providing a bias field to the first element in response to an applied electrical stimulus;
- means for maintaining intimate contact between said film magnetic recording layer and said first element while said film is stationary in the camera;
- and
- means including an underdamped resonant circuit for providing an electrical stimulus to said second element to effect anhysteretic recording of said pre-recorded data onto said film while said first element is in intimate contact with said film magnetic recording layer.
Dependencies are inferred from the claim text.