US3745543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension and mounting of transducer heads using resilient spacers to position head
Assignee: PACIFIC MICRONETICS Inc
•
Filing: 1970-06-15
•
Granted: 1973-07-10
•
Expires: 1990-06-15
Abstract
Abstract A ''''flying'''' transducer head is mounted in relation to a hard surface (disc or drum) through a retractable gimbal with pitch and roll positions of the head established through resilient spacers free from stress and strain when the head rests on the surface.
Inventors
- 👤 W King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:31
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
233 words
In a transducing system, of the flying head type, wherein a transducer head cooperates with a hard surface storage carrier moving at a speed resulting in aerodynamic lift of the head by a boundary layer above the surface of the storage carrier, the combination comprising: first means establishing a gimbal suspension for the head above the surface of the storage carrier, thereby establishing pitch and roll axes of the head as to its relative motion on the boundary layer of the storage carrier; second means for mounting the gimbal suspension of the first means in relation to the surface of the carrier and inCluding means (a) to obtain protraction and retraction of the head and of the gimbal system relative to the surface of the carrier further including means (b) to cause the means (a) to place the head on the surface in protracted position without force interaction between head and surface when the carrier is at rest, and establishing resilient reaction against aerodynamic lift of the head upon relative motion between the head and the carrier; and third means cooperating with the first and second means to obtain particular pitch and/or roll positions of the head relative to the actual surface of the carrier and including cured thixotropic liquid retaining the head in said positions and tending to restore the positions in case of angular deviation therefrom about pitch adn/or roll axes.
Claim 2
Dependent Claim
233 words
In a transducing system, of the flying head type, wherein a transducer head cooperates with a hard surface storage carrier moving at a speed resulting in aerodynamic lift of the head by a boundary layer above the surface of the storage carrier, the combination comprising: first means establishing a gimbal suspension for the head above the surface of the storage carrier, thereby establishing pitch and roll axes of the head as to its relative motion on the boundary layer of the storage carrier; second means for mounting the gimbal suspension of the first means in relation to the surface of the carrier and inCluding means (a) to obtain protraction and retraction of the head and of the gimbal system relative to the surface of the carrier further including means (b) to cause the means (a) to place the head on the surface in protracted position without force interaction between head and surface when the carrier is at rest, and establishing resilient reaction against aerodynamic lift of the head upon relative motion between the head and the carrier; and third means cooperating with the first and second means to obtain particular pitch and/or roll positions of the head relative to the actual surface of the carrier and including cured thixotropic liquid retaining the head in said positions and tending to restore the positions in case of angular deviation therefrom about pitch adn/or roll axes.
Claim 3
Dependent Claim
146 words
In a system as in claim 1, the first means including a gimbal frame, and first pivot means for pivotally supporting the head on a first axis, further including second pivot means for pivotally supporting the frame a support bar for pivoting on a second axis, the support bar suspended by the second means; the third means including cured thixotropic liquid as a first resilient means maintaining the angular head position relative to the first axis in force-free relation in the particular position of the head relative to the carrier, the third means including cured thixotropic liquid as a second resilient means maintaining the angular head and frame position relative to the second axis in force-free relation in the particular position of head relative to the carrier, the first and second resilient means providing position restoring forces when the head is deflected from said angular positions.
Claim 4
Dependent Claim
52 words
In a system as in claim 1, the means (a) included in the second means comprising a pressure operated plunger to control protraction and retraction of the head, the second means including additionally cantilever spring means, deflected for setting up a reaction force when the plunger has position to protract the head.
Claim 5
Dependent Claim
156 words
The equipment for establishing a particular mounting position of a transducer head in relation to a hard surface storage carrier using a gimbal structure establishing pitch and roll axes, comprising: first means for placing the transducer head in a particular position normal to the carrier, the head having a surface that obtains a particular position and orientation to the carrier when the head is placed in the particular position; second means including cured thixotropic liquid for providing an interaction-force-free connection between the head and the gimbal structure in that position of the head, as to pitch and roll of the head surface in relation to the gimbal structure; and third means for removing the head from the particular normal position while retaining the connection as provided, the connection having characteristics of setting up restoration forces when there is an angular deflection of the head about the pitch and roll axes as established by the gimbal structure.
Claim 6
Dependent Claim
156 words
The equipment for establishing a particular mounting position of a transducer head in relation to a hard surface storage carrier using a gimbal structure establishing pitch and roll axes, comprising: first means for placing the transducer head in a particular position normal to the carrier, the head having a surface that obtains a particular position and orientation to the carrier when the head is placed in the particular position; second means including cured thixotropic liquid for providing an interaction-force-free connection between the head and the gimbal structure in that position of the head, as to pitch and roll of the head surface in relation to the gimbal structure; and third means for removing the head from the particular normal position while retaining the connection as provided, the connection having characteristics of setting up restoration forces when there is an angular deflection of the head about the pitch and roll axes as established by the gimbal structure.
Claim 7
Dependent Claim
28 words
The equipment as in claim 4, the first means provided for causing the head to rest on the carrier without interacting forces normal to the engaging surfaces thereof.
Claim 8
Independent Claim
144 words
The method of establishing a particular mounting position of a transducer head in relation to a hard surface storage carrier, using a gimbal structure establishing pitch and roll axes, comprising: placing the transducer head in a particular position normal to the carrier, the head having a surface that obtains a particular position and orientation to the carrier surface, when the head is placed in the particular position; providing an interaction-force-free connection between the head and the gimbal structure in that position of the head as to pitch and roll of the head surface in relation to the gimbal structure; and removing the head from the particular normal position while retaining the connection as provided, the connection having characteristics of setting up restoration forces when there is an anGular deflection of the head about the pitch and roll axes as established by the gimbal structure.
Claim 9
Independent Claim
144 words
The method of establishing a particular mounting position of a transducer head in relation to a hard surface storage carrier, using a gimbal structure establishing pitch and roll axes, comprising: placing the transducer head in a particular position normal to the carrier, the head having a surface that obtains a particular position and orientation to the carrier surface, when the head is placed in the particular position; providing an interaction-force-free connection between the head and the gimbal structure in that position of the head as to pitch and roll of the head surface in relation to the gimbal structure; and removing the head from the particular normal position while retaining the connection as provided, the connection having characteristics of setting up restoration forces when there is an anGular deflection of the head about the pitch and roll axes as established by the gimbal structure.
Claim 10
Dependent Claim
57 words
The method as in claim 6, the providing step including the providing of quantities of a thixotropic liquid as spacer between head and gimbal structure and in the gimbal structure in the particular pitch and roll positions of the head when placed and having the liquid, the liquid selected to convert into a resilient solid after curing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |