US3582920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support device for magnetic head
Assignee: Unisys Corp
•
Filing: 1969-08-04
•
Granted: 1971-06-01
•
Expires: 1989-08-04
Abstract
Abstract A support device for floating a magnetic head assembly on a fluid atmosphere is asymmetrically dimensioned so it assumes a positive angle of approach on application of a normal force at its center point by an actuating mechanism. The support device is a substantially flat, thin body structure of elastic material having perforations therein positioned and shaped to form a platform, an inner frame surrounding the platform, an outer frame surrounding the inner frame, a first pair of connecting members between opposite sides of the platform and the inner frame, and a second pair of connecting members between opposite sides of the inner frame and the outer frame disposed transverse to the first pair of connecting members. In one embodiment, the platform that supports the head assembly is permanently deformed to lie in a plane forward of and disposed at an acute angle to the remainder of the support device. In other embodiments, the length and/or width of opposite legs of the frames are unequal, thereby normally causing unbalanced deflection of the support device responsive to the actuating mechanism.
Inventors
- 👤 Shahbuddin A Billawala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:28
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
224 words
In combination, a magnetic recording means including a recording surface moving in a fluid atmosphere, a magnetic head assembly adapted for floating on the fluid atmosphere, a support device having a platform coupled to said head assembly, means for supporting the support device with the head assembly oriented adjacent the recording surface, and an actuating member having an end for engaging the support device at a pivot point and forcing the head assembly into a floating position on the fluid atmosphere adjacent the moving recording surface, the support device including in a one-piece construction an approximately flat, thin, unsymmetrical body structure comprising an elastic material perforated to form the platform and a supporting network therefor that inhibits rotation of the head structure about an axis perpendicular to the recording surface, allows restrained rotation of the head assembly in other directions about first and second axes that intersect at the pivot point, and to allow movement of the head assembly toward and away from the recording surface with a positive angle of approach responsive to the force of the actuating member exerted at the pivot point, a portion of the platform being permanently deformed to lie forward of the remainder of the body structure, the head assembly being fixed to the permanently deformed portion so it is spaced from the remainder of the body structure.
Claim 2
Dependent Claim
224 words
In combination, a magnetic recording means including a recording surface moving in a fluid atmosphere, a magnetic head assembly adapted for floating on the fluid atmosphere, a support device having a platform coupled to said head assembly, means for supporting the support device with the head assembly oriented adjacent the recording surface, and an actuating member having an end for engaging the support device at a pivot point and forcing the head assembly into a floating position on the fluid atmosphere adjacent the moving recording surface, the support device including in a one-piece construction an approximately flat, thin, unsymmetrical body structure comprising an elastic material perforated to form the platform and a supporting network therefor that inhibits rotation of the head structure about an axis perpendicular to the recording surface, allows restrained rotation of the head assembly in other directions about first and second axes that intersect at the pivot point, and to allow movement of the head assembly toward and away from the recording surface with a positive angle of approach responsive to the force of the actuating member exerted at the pivot point, a portion of the platform being permanently deformed to lie forward of the remainder of the body structure, the head assembly being fixed to the permanently deformed portion so it is spaced from the remainder of the body structure.
Claim 3
Dependent Claim
30 words
The combination of claim 1, in which the permanently deformed portion of the platform lies in a plane disposed at an acute angle to the remainder of the body structure.
Claim 4
Dependent Claim
105 words
The combination of claim 1, in which the body structure is perforated to form a first frame surrounding the platform, a first pair of connecting members along the first axis of rotation between opposite sides of the first frame and the platform, a second frame surrounding the first frame, a second pair of connecting members along the second axis of rotation between opposite sides of the second frame and the first frame, the dimensions of the frames being unsymmetrical in such a way as to produce a positive angle of approach for the head assembly responsive to the force applied thereto by the actuating member.
Claim 5
Dependent Claim
72 words
The combination of claim 3, in which one frame is rectangular, one axis of rotation is perpendicular to the direction of movement of the recording surface and perpendicular to two legs of the one frame, and the portions of the two legs of the one frame lying on one side of the one axis are longer than the portions of the two legs lying on the other side of the one axis.
Claim 6
Dependent Claim
68 words
The combination of claim 3, in which one frame is rectangular, one axis of rotation is perpendicular to the direction of movement of the recording surface and perpendicular to two legs of the one frame, and the portions of the two legs lying on one side of the one axis are wider than the portions of the two legs lying on the other side of the one axis.
Claim 7
Dependent Claim
46 words
The combination of claim 3, in which one frame is rectangular, one axis of rotation is perpendicular to the direction of movement of the recording surface and parallel to two legs of the one frame, and one of the two legs is wider than the other.
Claim 8
Dependent Claim
204 words
In combination, a magnetic recording means including a recording surface moving in a fluid atmosphere, a magnetic head assembly adapted for floating on the fluid atmosphere, a support device having a platform coupled to said head assembly, means for holding the head assembly in spaced relationship from and disposed at an acute angle to the support device, means for supporting the support device with the head assembly oriented adjacent the recording surface, and an actuating member having an end for engaging the support device at a pivot point and forcing the head assembly into a floating position on the fluid atmosphere adjacent the moving recording surface, the support device including in a one-piece construction an approximately flat, thin body structure comprising an elastic material perforated to form the platform and a supporting network therefor that inhibits rotation of the head structure about an axis perpendicular to the recording surface, allows restrained rotation of the head assembly in other directions about first and second axes that intersect at the pivot point, and to allow movement of the head assembly toward and away from the recording surface with a positive angle of approach responsive to the force of the actuating member exerted at the pivot point.
Claim 9
Dependent Claim
204 words
In combination, a magnetic recording means including a recording surface moving in a fluid atmosphere, a magnetic head assembly adapted for floating on the fluid atmosphere, a support device having a platform coupled to said head assembly, means for holding the head assembly in spaced relationship from and disposed at an acute angle to the support device, means for supporting the support device with the head assembly oriented adjacent the recording surface, and an actuating member having an end for engaging the support device at a pivot point and forcing the head assembly into a floating position on the fluid atmosphere adjacent the moving recording surface, the support device including in a one-piece construction an approximately flat, thin body structure comprising an elastic material perforated to form the platform and a supporting network therefor that inhibits rotation of the head structure about an axis perpendicular to the recording surface, allows restrained rotation of the head assembly in other directions about first and second axes that intersect at the pivot point, and to allow movement of the head assembly toward and away from the recording surface with a positive angle of approach responsive to the force of the actuating member exerted at the pivot point.
Claim 10
Dependent Claim
36 words
The combination of claim 7, in which the holding means is a permanently deformed portion of the platform having a surface at an acute angle to the support device to which the head assembly is bonded.
Claim 11
Independent Claim
242 words
A device arranged for guiding and supporting a magnetic recording head with respect to a fluid atmosphere adjacent a moving magnetic recording surface comprising a thin, approximately flat elastic body having in a one-piece construction a head support platform a portion of which is permanently deformed to lie in a plane spaced from the remainder of the elastic body, an inner support member disposed around the inner support member, a first pair of connecting members between opposite sides of the platform and the inner support member along a first axis of rotation, a second pair of connecting members between opposite sides of the inner support member and the outer support member along a second axis of rotation, and means disposed along one oF the axes for securing the outer frame to a superstructure, the connecting members and support members inhibiting rotation of the head support member relative to the plane of the flat body but causing the elasticity of the body to permit restrained rotational movement of the head support member about the first and second axes, the flat elastic body being unsymmetrically constructed so that upon application of a force at the intersection of the first and second axes of the flat elastic body in a normal direction the portions of the body on one side of one axis are deformed more than the portions of the body on the other side of the one axis to produce a forward tilt.
Claim 12
Independent Claim
242 words
A device arranged for guiding and supporting a magnetic recording head with respect to a fluid atmosphere adjacent a moving magnetic recording surface comprising a thin, approximately flat elastic body having in a one-piece construction a head support platform a portion of which is permanently deformed to lie in a plane spaced from the remainder of the elastic body, an inner support member disposed around the inner support member, a first pair of connecting members between opposite sides of the platform and the inner support member along a first axis of rotation, a second pair of connecting members between opposite sides of the inner support member and the outer support member along a second axis of rotation, and means disposed along one oF the axes for securing the outer frame to a superstructure, the connecting members and support members inhibiting rotation of the head support member relative to the plane of the flat body but causing the elasticity of the body to permit restrained rotational movement of the head support member about the first and second axes, the flat elastic body being unsymmetrically constructed so that upon application of a force at the intersection of the first and second axes of the flat elastic body in a normal direction the portions of the body on one side of one axis are deformed more than the portions of the body on the other side of the one axis to produce a forward tilt.
Claim 13
Dependent Claim
30 words
The device of claim 9, in which the plane in which the permanently deformed portion of the platform lies forms an acute angle with the remainder of the flat body.
Claim 14
Dependent Claim
19 words
The device of claim 9, in which at least one support member is unsymmetrically dimensioned about the one axis.
Claim 15
Dependent Claim
68 words
The device of claim 11, in which the first and second support members and the platform are substantially rectangular, two legs of each support member are perpendicular to the one axis, and the portions of the legs of the support members on one side of the one axis are longer than the portions of the legs of the support members on the other side of the one axis.
Claim 16
Dependent Claim
59 words
The device of claim 11, in which the first and second support members and the platform are rectangular, two legs of each support member are perpendicular to the one axis, and the portions of the legs on one side of the one axis are wider than the portions of the legs on the other side of the one axis.
Claim 17
Dependent Claim
61 words
The device of claim 11, in which the first and second support members and the platform are rectangular, two legs of each support member are parallel to the one axis, and the legs of the support members on one side of the one axis are wider than the legs of the support members on the other side of the one axis.
Claim 18
Dependent Claim
146 words
A support device comprising in a one-piece construction a load support member, a portion of the load support member being permanently deformed so it lies in a plane displaced from the remainder of the load support member, and an elastic interconnecting network surrounding and coupled to the load support member such that the elasticity thereof allows restrained rotational movement of the load support member about first and second axes that intersect at a pivot point and the elastic members inhibit movement of the load support member parallel with the plane defined by the axes, the one piece construction being unsymmetrical about one axis such that upon application of a force in a normal direction to the load support member at the pivot point the load support member moves away from the network of elastic members with a tilt relative to the plane defined by the axes.
Claim 19
Dependent Claim
146 words
A support device comprising in a one-piece construction a load support member, a portion of the load support member being permanently deformed so it lies in a plane displaced from the remainder of the load support member, and an elastic interconnecting network surrounding and coupled to the load support member such that the elasticity thereof allows restrained rotational movement of the load support member about first and second axes that intersect at a pivot point and the elastic members inhibit movement of the load support member parallel with the plane defined by the axes, the one piece construction being unsymmetrical about one axis such that upon application of a force in a normal direction to the load support member at the pivot point the load support member moves away from the network of elastic members with a tilt relative to the plane defined by the axes.
Claim 20
Dependent Claim
192 words
In combination, a magnetic recording means including a recording surface moving in a fluid atmosphere, a magnetic head assembly adapted for floating on the fluid atmosphere, a support device having a platform coupled to said head assembly, means for supporting the support device with the head assembly oriented adjacent the recording surface, and an actuating member having an end for engaging the support device at a pivot point and forcing the head assembly into a floating position on the fluid atmosphere adjacent the moving recording surface, the support device including in a one-piece construction a thin body structure comprising an elastic material perforated to form the platform and a supporting network therefor that inhibits rotation of the head structure relative to the recording surface and allows restrained rotation of the head assembly in other directions about first and second axes that intersect at the pivot point, the supporting network having unsymmetrical deflection characteristics on opposite sides of one axis to allow movement of the head assembly toward and away from the recording surface with a positive angle of approach responsive to the force of the actuatiNg member exerted at the pivot point.
Claim 21
Dependent Claim
192 words
In combination, a magnetic recording means including a recording surface moving in a fluid atmosphere, a magnetic head assembly adapted for floating on the fluid atmosphere, a support device having a platform coupled to said head assembly, means for supporting the support device with the head assembly oriented adjacent the recording surface, and an actuating member having an end for engaging the support device at a pivot point and forcing the head assembly into a floating position on the fluid atmosphere adjacent the moving recording surface, the support device including in a one-piece construction a thin body structure comprising an elastic material perforated to form the platform and a supporting network therefor that inhibits rotation of the head structure relative to the recording surface and allows restrained rotation of the head assembly in other directions about first and second axes that intersect at the pivot point, the supporting network having unsymmetrical deflection characteristics on opposite sides of one axis to allow movement of the head assembly toward and away from the recording surface with a positive angle of approach responsive to the force of the actuatiNg member exerted at the pivot point.
Claim 22
Independent Claim
239 words
A device arranged for guiding and supporting a magnetic recording head with respect to a fluid atmosphere adjacent a moving magnetic recording surface comprising a thin elastic body having in a one-piece construction a head support platform, an inner support member disposed around the platform, an outer support member disposed around the inner support member, a first pair of connecting members between opposite sides of the platform and the inner support member along a first axis of rotation, second pair of connecting members between opposite sides of the inner support member and the outer support member along a second axis of rotation, and means disposed along one of the axes for securing the outer frame to a superstructure, the connecting members and support members inhibiting rotation of the head support member relative to the plane of the flat body but causing the elasticity of the body to permit restrained rotational movement of the head support member about the first and second axes, the support members being constructed with unsymmetrical deflection characteristics on opposite sides of one axis so that upon application of a force at the intersection of the first and second axes of the elastic body in a normal direction the portions of the body on one side of the one axis are deformed more than the portions of the body on the other side of the one axis to produce a forward tilt about the one axis.
Claim 23
Independent Claim
239 words
A device arranged for guiding and supporting a magnetic recording head with respect to a fluid atmosphere adjacent a moving magnetic recording surface comprising a thin elastic body having in a one-piece construction a head support platform, an inner support member disposed around the platform, an outer support member disposed around the inner support member, a first pair of connecting members between opposite sides of the platform and the inner support member along a first axis of rotation, second pair of connecting members between opposite sides of the inner support member and the outer support member along a second axis of rotation, and means disposed along one of the axes for securing the outer frame to a superstructure, the connecting members and support members inhibiting rotation of the head support member relative to the plane of the flat body but causing the elasticity of the body to permit restrained rotational movement of the head support member about the first and second axes, the support members being constructed with unsymmetrical deflection characteristics on opposite sides of one axis so that upon application of a force at the intersection of the first and second axes of the elastic body in a normal direction the portions of the body on one side of the one axis are deformed more than the portions of the body on the other side of the one axis to produce a forward tilt about the one axis.
Claim 24
Dependent Claim
118 words
A support device comprising in a one-piece construction a load support member, and an elastic interconnecting network surrounding and coupled to the load support member such that the elasticity thereof allows restrained rotational movement of the load support member about first and second axes that intersect at a pivot point and inhibits movement of the load support member parallel with the plane defined by the axes, the interconnecting network having unsymmetrical deflection characteristics on opposite sides of one axis such that upon application of a force in a normal direction to the load support member at the pivot point the load support member moves away from the network of elastic members with a tilt about the one axis.
Claim 25
Dependent Claim
118 words
A support device comprising in a one-piece construction a load support member, and an elastic interconnecting network surrounding and coupled to the load support member such that the elasticity thereof allows restrained rotational movement of the load support member about first and second axes that intersect at a pivot point and inhibits movement of the load support member parallel with the plane defined by the axes, the interconnecting network having unsymmetrical deflection characteristics on opposite sides of one axis such that upon application of a force in a normal direction to the load support member at the pivot point the load support member moves away from the network of elastic members with a tilt about the one axis.
References Cited (Backward Citations)
US3310792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |