US3656014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damping apparatus for a linear step motor having two translational degrees of freedom
Assignee: Gerber Systems Corp
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Filing: 1971-04-08
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Granted: 1972-04-11
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Expires: 1991-04-08
Abstract
Abstract A viscoelastic damping apparatus is mounted to a structure which is moved by at least two linear step motor armatures in a stepby-step manner simultaneously or sequentially in each of two coordinate directions. The step motor armatures each include electromagnetic motor poles which are excited in a phased sequence to produce movements of the structure in the two coordinate directions. The damping apparatus is composed of inertial mass and a viscoelastic member which connects the mass to the structure to resiliently damp the stepping movements of the structure.
Inventors
- 👤 Leonard G Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:55
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; H02K41/031; H02K41/033; H02K2201/00; H02K2201/18; H02K2207/00; H02K7/00; H02K7/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
In a linear step motor system in which a structure including at least two linear step motor armatures and having two degrees of translational freedom respectively along two coordinate directions is moved in a step-by-step manner in each of the two coordinate directions by exciting the electromagnetic motor poles of the armatures in phased sequences, the improvement comprising: an inertial mass; resilient means interposed between said inertial mass and the structure for resiliently restraining movements of the inertial mass relative to the structure in each of the coordinate directions; and viscous damping means interposed between the inertial mass and the structure for viscously damping the movements of the inertial mass relative to the structure in each of the coordinate directions.
Claim 2
Dependent Claim
120 words
In a linear step motor system in which a structure including at least two linear step motor armatures and having two degrees of translational freedom respectively along two coordinate directions is moved in a step-by-step manner in each of the two coordinate directions by exciting the electromagnetic motor poles of the armatures in phased sequences, the improvement comprising: an inertial mass; resilient means interposed between said inertial mass and the structure for resiliently restraining movements of the inertial mass relative to the structure in each of the coordinate directions; and viscous damping means interposed between the inertial mass and the structure for viscously damping the movements of the inertial mass relative to the structure in each of the coordinate directions.
Claim 3
Dependent Claim
28 words
An improvement as defined in claim 1 wherein said resilient means and said viscous damping means include a viscoelastic member coupled between said inertial mass and the structure.
Claim 4
Dependent Claim
40 words
An improvement as defined in claim 2 wherein said inertial mass and said viscoelastic member are positioned serially along an axis extending perpendicular to each of the two coordinate directions in which the structure is moved in a step-by-step manner.
Claim 5
Dependent Claim
22 words
An improvement as defined in claim 2 wherein said viscoelastic member is bonded to the structure including the linear step motor armatures.
Claim 6
Dependent Claim
17 words
An improvement as defined in claim 2 wherein said viscoelastic member is bonded to said inertial mass.
Claim 7
Dependent Claim
36 words
An improvement as defined in claim 2 wherein said resilient means also includes spring restraining means connected between the structure and said inertial mass for resiliently restraining movements of the inertial mass relative to the structure.
References Cited (Backward Citations)
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |