US3696351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording head mounting and actuator combination
Assignee: Unisys Corp
•
Filing: 1970-11-23
•
Granted: 1972-10-03
•
Expires: 1990-11-23
Abstract
Abstract A recording head mounting arrangement is provided for precisely positioning a plurality of recording heads in a housing adjacent a face of a magnetic memory disk. Each recording head is mounted on an individual assembly for individual removal if desired. Holes for mounting the head assemblies are provided in the housing in precise positions and means are provided for keying the assemblies to the housing for maintaining head orientation. Each individual assembly comprises a circular body extending through the housing with the head mounted on a conventional gimbal spring inside the housing. A pneumatic actuator is concentric with the circular body for advancing and retracting the head. Means are provided for passing electrical leads from the recording head to the outside of the housing.
Inventors
- 👤 Robert G Groom
- 👤 Collen K Brimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:28
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4826; G11B5/10; G11B5/105; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
221 words
A magnetic memory system comprising: a rotatable magnetic memory disk; a substantially enclosed housing surrounding the disk; a plurality of cylindrical apertures through the housing adjacent each face of the disk and spaced radially and circumferentially from each other; a plurality of individual recording head assemblies, each in its respective aperture, each recording head assembly comprising: a head support body having one face inside the housing and the other face outside the housing and a cylindrical portion therebetween complementary to the cylindrical portion of the aperture; a single recording head mounted adjacent the inside face of the body in a predetermined position; means for advancing and retracting the head; sealed means for passing electrical leads from the recording head to the outside face of the body; and means for sealing each recording head assembly to the housing; an outwardly facing alignment hole in the housing adjacent each aperture; an alignment hole in each head support body facing the inside of the housing; a pin positioned between the respective holes for orienting each recording head assembly in a predetermined position; and at least a pair of holes in the head support body for aligning the recording head, each of the three alignment holes in the head support body being precisely positioned relative to each other and the cylindrical portion of the body.
Claim 2
Dependent Claim
221 words
A magnetic memory system comprising: a rotatable magnetic memory disk; a substantially enclosed housing surrounding the disk; a plurality of cylindrical apertures through the housing adjacent each face of the disk and spaced radially and circumferentially from each other; a plurality of individual recording head assemblies, each in its respective aperture, each recording head assembly comprising: a head support body having one face inside the housing and the other face outside the housing and a cylindrical portion therebetween complementary to the cylindrical portion of the aperture; a single recording head mounted adjacent the inside face of the body in a predetermined position; means for advancing and retracting the head; sealed means for passing electrical leads from the recording head to the outside face of the body; and means for sealing each recording head assembly to the housing; an outwardly facing alignment hole in the housing adjacent each aperture; an alignment hole in each head support body facing the inside of the housing; a pin positioned between the respective holes for orienting each recording head assembly in a predetermined position; and at least a pair of holes in the head support body for aligning the recording head, each of the three alignment holes in the head support body being precisely positioned relative to each other and the cylindrical portion of the body.
Claim 3
Dependent Claim
54 words
A combination as defined in claim 1 wherein the means for advancing and retracting the head comprises: a piston concentric with the cylindrical portion of the body and in operative engagement with the recording head; a pressure responsive diaphragm in operative engagement with the piston; and means for applying pneumatic pressure to the diaphragm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |