US3743794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translational motion apparatus for the magnetic transducers of a disc memory
Assignee: HP Inc
•
Filing: 1972-03-02
•
Granted: 1973-07-03
•
Expires: 1992-03-02
Abstract
Abstract An improved linear motor includes a motion transducer disposed within the core section of the magnetic circuit for the shuttle of the linear motor to provide a velocity output signal substantially unaffected by magnetic fields and eddy currents associated with current in the linear motor coil. The positional adjustment of the magnetic transducers carried by the shuttle of the linear motor is facilitated by the cam action of an adjustment tool which fits within a recess in the shuttle and engages a transverse slot within the support for the magnetic transducer.
Inventors
- 👤 J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:00
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/035; H02K41/0352; H02K41/0354; H02K41/0356; G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
212 words
Linear positioning apparAtus for a magnetic transducer of a magnetic disc storage device which has a substantially planar recording surface thereon, the apparatus comprising: shuttle means mounted for lineal movement along a path which is substantially normal to and radially aligned with the rotational axis of a magnetic disc storage device; a mounting surface carried by said shuttle means which is substantially plane-parallel to the recording surface of the magnetic disc storage device; a mounting member slidably supported with respect to said mounting surface for lineal movement of the mounting member in a direction aligned with said path of movement of the shuttle means, the mounting member having a first cam surface at a location along an edge thereof in the region of the mounting surface and being disposed to support a magnetic transducer with respect to the recording surface of a magnetic disc storage device; a second cam surface carried by said shuttle means adjacent the mounting surface in the region of the first cam surface for providing with the first cam surface a set of leverage points by which a lever may exert force on the mounting member in a direction aligned with said path of movement for altering the position of said mounting member relative to said shuttle means.
Claim 2
Dependent Claim
212 words
Linear positioning apparAtus for a magnetic transducer of a magnetic disc storage device which has a substantially planar recording surface thereon, the apparatus comprising: shuttle means mounted for lineal movement along a path which is substantially normal to and radially aligned with the rotational axis of a magnetic disc storage device; a mounting surface carried by said shuttle means which is substantially plane-parallel to the recording surface of the magnetic disc storage device; a mounting member slidably supported with respect to said mounting surface for lineal movement of the mounting member in a direction aligned with said path of movement of the shuttle means, the mounting member having a first cam surface at a location along an edge thereof in the region of the mounting surface and being disposed to support a magnetic transducer with respect to the recording surface of a magnetic disc storage device; a second cam surface carried by said shuttle means adjacent the mounting surface in the region of the first cam surface for providing with the first cam surface a set of leverage points by which a lever may exert force on the mounting member in a direction aligned with said path of movement for altering the position of said mounting member relative to said shuttle means.
Claim 3
Dependent Claim
149 words
Linear positioning apparatus as in claim 1 wherein said first cam surface is a recessed slot in an edge of the mounting member that is adjacent the second cam surface and that is oriented substantially normal to said direction; said second cam surface includes a recess in said shuttle means adjacent the first cam surface for receiving a protrusion in rotatable engagement therewithin; and adjustment means including an elongated element having a protrusion thereon located near an end thereof for selectively engaging the second cam surface for rotation therewithin, said adjustmemt means including an element which is located eccentric the axis of rotation of said protrusion in said second cam surface and which is disposed selectively to engage said first cam surface for urging said mounting member relative to said shuttle means in a direction aligned with said path of movement in response to rotation of said adjustment means.
Claim 4
Dependent Claim
34 words
Linear positioning apparatus as in claim 1 comprising clamping means disposed with respect to said shuttle means and said mounting member for selectively retaining said mounting member in adjusted position on said mounting surface.
References Cited (Backward Citations)
US3544980A
Cited
US3646536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |