Magnetic deflection system for depressed-center sector scan display

Claim 2

In a diSplay system employing an azimuthal scan generator, a range sweep generator and a cathode ray tube having a longitudinal axis and a deflection control yoke, means for providing a plan position indicator sector scan having a center radially offset from the display face center of said tube and comprising an auxiliary coil externally of said indicator and axially spaced intermediate said control yoke and said display face and oriented relative to the longitudinal axis of said tube to provide a resultant magnetic vector which is mutually angled relative to said longitudinal axis, said auxiliary coil being driven by said azimuthal scan generator, and only a preselected one of the two mutually orthogonal deflection controls of said control yoke being driven by said range sweep generator.

Claim 3

The device of claim 1 in which there is further included a pair of windings interconnected in series magnetic-aiding circuit with and disposed mutually concentric with and coaxial of said auxiliary coil, the component magnetic vector provided by excitation of said pair being radial of said longitudinal axis.

Claim 4

The device of claim 1 in which said auxiliary coil is oriented to provide a resultant magnetic vector mutually angled relative to said longitudinal axis in a plane parallel to the electron beam deflection direction provided by excitation of only a preselected one of the two control inputs of said deflection yoke, a second control input of said yoke being connected in circuit with said auxiliary coil.

Claim 5

In an azimuthally scanning radar system, a depressed center sector scan display device, comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, only a first input of said control yoke being responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction.

Claim 6

In an azimuthally scanning radar system, a depressed center sector scan display device, comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, only a first input of said control yoke being responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction.

Claim 7

A depressed center sector scan display device for use in an azimuthally scanning radar system and comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, a first input of said control yoke being adapted to be responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and adapted to be responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction, said auxiliary coil being connected in series circuit with a second input of said deflection yoke.

Claim 8

A depressed center sector scan display device for use in an azimuthally scanning radar system and comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, a first input of said control yoke being adapted to be responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and adapted to be responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction, said auxiliary coil being connected in series circuit with a second input of said deflection yoke.

Claim 9

The device of claim 4 in which there is provided means for selectively exciting a second input of said control yoke relative to and in synchronism with excitation of said auxiliary winding. 7. The device of claim 4 in which there is included an auxiliary yoke mutually concentric with and coaxial of said auxiliary winding and in series circuit therewith for providing a component magnetic vector substantially parallel to said first deflection control direction and perpendicular to that provided by said first input to said first mentioned control yoke.

Claim 10

The device of claim 5 in which there is provided a shunting impedance across one of said auxiliary coil and said second input of said first mentioned control yoke.

Claim 11

In a display system employing a cathode ray tube of the electromagnetic deflection control yoke type, means for providing an improved plan position indicator sector scan, comprising an auxiliary deflection coil externally wound about said tube and axially spaced intermediate a control yoke and a display face of said tube and oriented with a magnetic vector provided by said coil in the vicinity of the longitudinal axis of said tube being preselectively angled relative to said longitudinal axis, said auxiliary deflection coil being responsive to an azimuthal scan signal generator of said system and only a preselected one of the two deflection control inputs of said yoke being responsive to a radial range sweep generator.

Claim 12

In a display system employing a cathode ray tube of the electromagnetic deflection control yoke type, means for providing an improved plan position indicator sector scan, comprising an auxiliary deflection coil externally wound about said tube and axially spaced intermediate a control yoke and a display face of said tube and oriented with a magnetic vector provided by said coil in the vicinity of the longitudinal axis of said tube being preselectively angled relative to said longitudinal axis, said auxiliary deflection coil being responsive to an azimuthal scan signal generator of said system and only a preselected one of the two deflection control inputs of said yoke being responsive to a radial range sweep generator.

Claim 13

The device of claim 9 in which said magnetic vector is displaced from said longitudinal axis of said indicator in one of said two deflection control directions.

Claim 14

The device of claim 9 in which said magnetic vector is preselectively angled relative to said longitudinal axis in one of said control directions.

Claim 15

The device of claim 9 in which said magnetic vector is displaced from said longitudinal axis of said display indicator in one of said two deflection control directions and in which said magnetic central axis is preselectively angled relative to said longitudinal axis of said indicator in one of said two deflection control directions.

Claim 16

The device of claim 12 in which there is provided means for coupling at least a portion of the excitation through said auxiliary deflection coil into that control winding pair of said control yoke associated with a preselected one of said control directions.

Claim 17

A depressed center sector scan display device for use in an azimuthally scanning radar system and comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, a first input of said control yoke being adapted to be responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and adapted to be responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction in which there is provided means for coupling at least a portion of the excitation through said auxiliary coil into said second input of said control yoke.

Claim 18

A depressed center sector scan display device for use in an azimuthally scanning radar system and comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, a first input of said control yoke being adapted to be responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and adapted to be responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction in which there is provided means for coupling at least a portion of the excitation through said auxiliary coil into said second input of said control yoke.

Claim 19

A depressed center sector scan display device for use in an azimuthally scanning radar system and comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, a first input of said control yoke being adapted to be responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and adapted to be responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction; an auxiliary yoke mutually concentric with and coaxial of said auxiliary winding and in series circuit therewith for providing a component magnetic vector substantially parallel to said first deflection control direction and perpendicular to that provided by said first input to said first mentioned control yoke, said auxiliary yoke being comprised of two windings diametrically disposed about the longitudinal axis of said tube, the magnetic axes of said windings being substantially mutually aligned, said windings being intErconnected in series aiding circuit.

Claim 20

A depressed center sector scan display device for use in an azimuthally scanning radar system and comprising a cathode ray tube having a deflection control yoke for providing deflection control of an electron beam in a first and second mutually orthogonal direction, a first input of said control yoke being adapted to be responsive to a range sweep generator of said radar system for effecting deflection control in said first direction; and an auxiliary coil wound about said tube and axially spaced intermediate said control yoke and a display face of said tube and adapted to be responsive to an azimuthal scan signal generator of said radar system and oriented to provide a magnetic vector mutually angled relative to a longitudinal axis of said tube in a plane substantially parallel to said first deflection control direction; an auxiliary yoke mutually concentric with and coaxial of said auxiliary winding and in series circuit therewith for providing a component magnetic vector substantially parallel to said first deflection control direction and perpendicular to that provided by said first input to said first mentioned control yoke, said auxiliary yoke being comprised of two windings diametrically disposed about the longitudinal axis of said tube, the magnetic axes of said windings being substantially mutually aligned, said windings being intErconnected in series aiding circuit.