US3678480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for a pneumatic actuated magnetic head
Assignee: Unisys Corp
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Filing: 1970-02-02
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Granted: 1972-07-18
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Expires: 1990-02-02
Abstract
Abstract A pneumatic actuating device for a magnetic recording head for a disk memory file or the like is described. Pneumatic pressure is brought to the actuator by an air supply tube which is held in place and also sealed by an O-ring surrounding the tube and compressed between a flat surface and a conical surface so as to squeeze inwardly on the outside wall of the tube. Pneumatic pressure within the assembly acts on a diaphragm to which a rigid disk is attached, and the disk acts on one end of a pin, the other end of which actuates the recording head.
Inventors
- 👤 Alpheus F Stansell
- 👤 Eugene E Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:00
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
An improved magnetic head assembly actuating device comprising: a head support sealable to a housing and adapted to support a magnetic head assembly; a piston mounted in the head support having an end in engagement with a magnetic head assembly; a flexible diaphragm adjacent the end of the piston opposite from the magnetic recording head; means for forming a chamber adjacent the diaphragm including an aperture for receiving an air supply tube; an air supply tube in the aperture; a tube retainer having a conical countersink coaxial with the air tube; an O-ring compressed between the conical countersink and the means for forming a chamber for retaining and sealing the exterior of the air tube; and a substantially rigid insert within the end of the air tube in the region surrounded by the O-ring for preventing collapse of the tube.
Claim 2
Dependent Claim
140 words
An improved magnetic head assembly actuating device comprising: a head support sealable to a housing and adapted to support a magnetic head assembly; a piston mounted in the head support having an end in engagement with a magnetic head assembly; a flexible diaphragm adjacent the end of the piston opposite from the magnetic recording head; means for forming a chamber adjacent the diaphragm including an aperture for receiving an air supply tube; an air supply tube in the aperture; a tube retainer having a conical countersink coaxial with the air tube; an O-ring compressed between the conical countersink and the means for forming a chamber for retaining and sealing the exterior of the air tube; and a substantially rigid insert within the end of the air tube in the region surrounded by the O-ring for preventing collapse of the tube.
Claim 3
Dependent Claim
32 words
An actuating device as defined in claim 1 wherein the aperture in the means for forming a chamber includes a shoulder for engaging an end of the tube and preventing over-insertion thereof.
Claim 4
Dependent Claim
144 words
An improved magnetic head assembly actuating device comprising: a head support sealable to a housing and adapted to support a magnetic head assembly; an axially slidable pin having a first rounded end in engagement with a magnetic head assembly; a rigid flat disk having a face engaging a rounded end of the pin opposite from the end engaging the magnetic head assembly; a flexible diaPhragm connected to the face of the disk opposite from the magnetic recording head assembly; means for forming a chamber adjacent the diaphragm including an aperture for receiving an air supply tube; an air supply tube in the aperture; a tube retainer having a conical countersink coaxial with the air tube; and an O-ring compressed between the conical countersink and a flat surface on the means for forming a chamber for retaining and sealing the exterior of the air tube.
Claim 5
Dependent Claim
144 words
An improved magnetic head assembly actuating device comprising: a head support sealable to a housing and adapted to support a magnetic head assembly; an axially slidable pin having a first rounded end in engagement with a magnetic head assembly; a rigid flat disk having a face engaging a rounded end of the pin opposite from the end engaging the magnetic head assembly; a flexible diaPhragm connected to the face of the disk opposite from the magnetic recording head assembly; means for forming a chamber adjacent the diaphragm including an aperture for receiving an air supply tube; an air supply tube in the aperture; a tube retainer having a conical countersink coaxial with the air tube; and an O-ring compressed between the conical countersink and a flat surface on the means for forming a chamber for retaining and sealing the exterior of the air tube.
Claim 6
Dependent Claim
105 words
An improved magnetic head assembly actuating device comprising: a head support sealable to a housing and adapted to support a magnetic head assembly; a piston pin having rounded ends, one of the ends being in engagement with the magnetic head assembly; means for guiding the pin for axial motion; a rigid flat disk having one face in engagement with the other rounded end of the pin; a flexible rolling diaphragm in engagement with the opposite face of the disk and isolating the disk from engagement with the walls of the head support; and means for applying pneumatic pressure to the other side of the diaphragm.
Claim 7
Dependent Claim
105 words
An improved magnetic head assembly actuating device comprising: a head support sealable to a housing and adapted to support a magnetic head assembly; a piston pin having rounded ends, one of the ends being in engagement with the magnetic head assembly; means for guiding the pin for axial motion; a rigid flat disk having one face in engagement with the other rounded end of the pin; a flexible rolling diaphragm in engagement with the opposite face of the disk and isolating the disk from engagement with the walls of the head support; and means for applying pneumatic pressure to the other side of the diaphragm.
Claim 8
Dependent Claim
93 words
In a magnetic head assembly actuating device comprising a head support, a flexible rolling diaphragm mounted in the head support, and means for applying pneumatic pressure to the diaphragm; an improved piston comprising: a cylindrical pin having rounded ends with one end engaging a magnetic head assembly; means for guiding the pin for axial motion; and a substantially rigid flat disk having one face engaging the other rounded end of the pin and the opposite face engaging the diaphragm, the edges of the disk being isolated from the walls of the head support.
Claim 9
Dependent Claim
93 words
In a magnetic head assembly actuating device comprising a head support, a flexible rolling diaphragm mounted in the head support, and means for applying pneumatic pressure to the diaphragm; an improved piston comprising: a cylindrical pin having rounded ends with one end engaging a magnetic head assembly; means for guiding the pin for axial motion; and a substantially rigid flat disk having one face engaging the other rounded end of the pin and the opposite face engaging the diaphragm, the edges of the disk being isolated from the walls of the head support.
Claim 10
Dependent Claim
107 words
In an improved magnetic head assembly actuating device as defined in claim 5, an improved means for applying pneumatic pressure to the diaphragm comprising chamber means for applying uniform pneumatic pressure to the diaphragm; an air supply tube in fluid communication with the chamber means; a retainer bracket having an aperture for accommodating the end of the air tube; a conical countersink in the retainer bracket; a flat face opposite the conical countersink for forming a conical recess circumscribing the air tube; and an O-ring in the conical recess for compression by the countersink against the outside of the air tube for retaining and sealing the tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |