US3845929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing mechanism
Assignee: Bell and Howell Co
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Filing: 1971-11-04
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Granted: 1974-11-05
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Expires: 1991-11-04
Abstract
Abstract A mass is supported in a frame free from gravitational influence by spring means so that translatory frame movement of low frequency will be transmitted to said mass while translatory frame movement at or above a predetermined high frequency will be isolated from said mass. The spring means defines a pair of intersecting axes about which the mass is adapted to vibrate when the spring tensions because of high frequency translatory frame movements. Magnetic means, however, resist return of the mass to a balanced condition from an unbalanced condition which the mass assumes when the spring is tensioned, thereby to lower the inherent vibratory frequency of the mass to a value below the predetermined high frequency.
Inventors
- 👤 J Reekie
- 👤 M Royston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:20
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
164 words
A stabilized mass system comprising: a frame member; a mass; elastic means mounting said mass to said frame member for vibration about an axis at an inherent vibratory frequency; said mounted mass having a rest position relative to said frame member and said elastic means applying a return torque to said mounted mass to return said mounted mass to said rest position when said mounted mass is displaced from said rest position, said return torque being substantially zero when saId mounted mass is at said rest position and increasing in magnitude as said mounted mass is displaced from said rest position; and means for applying a torque to said mounted mass in opposition to said return torque, said opposing torque being substantially zero when said mounted mass is at said rest position and increasing in magnitude as said mounted mass moves away from said rest position during said vibratory motion about said rest position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 2
Dependent Claim
164 words
A stabilized mass system comprising: a frame member; a mass; elastic means mounting said mass to said frame member for vibration about an axis at an inherent vibratory frequency; said mounted mass having a rest position relative to said frame member and said elastic means applying a return torque to said mounted mass to return said mounted mass to said rest position when said mounted mass is displaced from said rest position, said return torque being substantially zero when saId mounted mass is at said rest position and increasing in magnitude as said mounted mass is displaced from said rest position; and means for applying a torque to said mounted mass in opposition to said return torque, said opposing torque being substantially zero when said mounted mass is at said rest position and increasing in magnitude as said mounted mass moves away from said rest position during said vibratory motion about said rest position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 3
Dependent Claim
140 words
A mass system stabilized with respect to a frame during vibration of said frame that comprises: a frame capable of being vibrated; a band spring mounting a mass system to said frame for rotation about an axis; a first magnet mounted on said mass system; and a second magnet mounted on said frame; said first and second magnets being disposed such that when the mass system is at rest like magnetic poles are in facing relationship and such that they apply a torque to said mounted mass in opposition to said spring and, said opposing torque being substantially zero when said mounted mass is at said rest position and increasing in magnitude as said mounted mass moves away from said rest position during said vibratory motion about said rest position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 4
Dependent Claim
140 words
A mass system stabilized with respect to a frame during vibration of said frame that comprises: a frame capable of being vibrated; a band spring mounting a mass system to said frame for rotation about an axis; a first magnet mounted on said mass system; and a second magnet mounted on said frame; said first and second magnets being disposed such that when the mass system is at rest like magnetic poles are in facing relationship and such that they apply a torque to said mounted mass in opposition to said spring and, said opposing torque being substantially zero when said mounted mass is at said rest position and increasing in magnitude as said mounted mass moves away from said rest position during said vibratory motion about said rest position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 5
Independent Claim
122 words
A system for stabilizing a mass connected to a frame during vibration of said frame at or above a high frequency comprising: a frame member capable of being vibrated at or above a predetermined high frequency; a mass; elastic means mounting said mass to said frame for vibration about an axis, said mounted mass having a high vibratory frequency; and means for applying a torque to said mounted mass in opposition to said elastic means, said opposing torque being substantially zero when said mounted mass is at said rest position and increasing in magnitude as said mounted mass moves away from said rest position during said vibratory motion about said rest position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 6
Independent Claim
122 words
A system for stabilizing a mass connected to a frame during vibration of said frame at or above a high frequency comprising: a frame member capable of being vibrated at or above a predetermined high frequency; a mass; elastic means mounting said mass to said frame for vibration about an axis, said mounted mass having a high vibratory frequency; and means for applying a torque to said mounted mass in opposition to said elastic means, said opposing torque being substantially zero when said mounted mass is at said rest position and increasing in magnitude as said mounted mass moves away from said rest position during said vibratory motion about said rest position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 7
Independent Claim
187 words
A system for stabilizing a mass mounted to a member during vibration of the member at or above a predetermined high frequency about a pair of substantially intersecting axes comprising: a member capable of being vibrated at or above said high frequency; a mass system; elastic means mounting said mass system for vibratory movement about said pair of substantially intersecting axes; said mounted mass system having an inherent harmonic vibratory frequency about each of said axes at least as high as said predetermined high frequency; said mounted mass system being so disposed that the center of gravity thereof is substantially coincident with the point of intersection of said axes when said mounted mass system is in equilibrium position with respect to said member; and modifying means for applying a torque to said mounted mass in opposition to said elastic means, said opposing torque being substantially zero when said mounted mass is at said equilibrium position and increasing in magnitude as said mounted mass moves away from said equilibrium position during said vibratory motion about said equilibrium position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 8
Independent Claim
187 words
A system for stabilizing a mass mounted to a member during vibration of the member at or above a predetermined high frequency about a pair of substantially intersecting axes comprising: a member capable of being vibrated at or above said high frequency; a mass system; elastic means mounting said mass system for vibratory movement about said pair of substantially intersecting axes; said mounted mass system having an inherent harmonic vibratory frequency about each of said axes at least as high as said predetermined high frequency; said mounted mass system being so disposed that the center of gravity thereof is substantially coincident with the point of intersection of said axes when said mounted mass system is in equilibrium position with respect to said member; and modifying means for applying a torque to said mounted mass in opposition to said elastic means, said opposing torque being substantially zero when said mounted mass is at said equilibrium position and increasing in magnitude as said mounted mass moves away from said equilibrium position during said vibratory motion about said equilibrium position, thereby reducing said inherent vibratory frequency of said mounted mass.
Claim 9
Dependent Claim
46 words
The system set forth in claim 4, wherein said modifying means comprises a first magnet mounted on said mass system and a second magnet mounted on said frame, said magnets being disposed such that when said mass system is at rest like poles face one another.
Claim 10
Dependent Claim
58 words
The system set forth in claim 4 wherein said elastic means is a band spring having one end fixed to said frame and the other end fixed to said mass system, said spring being capable of flexure about both the longitudinal axis of said spring and a second axis that is perpendicular to and intersects said longitudinal axis.
Claim 11
Dependent Claim
46 words
The system set forth in claim 6 wherein said modifyinG means comprises a first magnet mounted on said mass system and a second magnet mounted on said frame, said magnets being disposed such that when said mass system is at rest like poles face one another.
Claim 12
Dependent Claim
71 words
The system set forth in claim 4 wherein said elastic means comprises a first pair of band springs mounted at one end to said frame and at the other end to a ring for flexure about a first axis; and a second pair of band springs mounted at one end to said ring and at the other end to the remainder of said mass system for flexure about a second axis.
Claim 13
Dependent Claim
46 words
The system set forth in claim 8 wherein said modifying means comprises a first magnet mounted on said mass system and a second magnet mounted on said member, said magnets being disposed such that when said mass system is at rest like poles face one another.
Claim 14
Dependent Claim
46 words
The system set forth in claim 4 wherein said elastic means comprises two pair of diametrically opposed springs that are mounted at one end to said frame and at the other end to said mass system for flexure about said pair of mutually perpendicular intersecting axes.
Claim 15
Dependent Claim
46 words
The system set forth in claim 10 wherein said modifying means comprises a first magnet mounted on said mass system and a second magnet mounted on said member, said magnets being disposed such that when said mass system is at rest like poles face one another.
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |