Patent US3768468A successfully refreshed from Google Patents.
US3603159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preload adjustment means for a transducer
Assignee: United Control Corp
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Filing: 1969-09-08
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Granted: 1971-09-07
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Expires: 1989-09-08
Abstract
Abstract A preload adjustment means for the seismic element of a pendulous accelerometer in which the seismic element is rotatably mounted on the free end of a cantilevered leaf spring. An adjustment screw is mounted through a bore in the support structure for movement in a direction parallel to the leaf spring. An L-shaped spring link between the screw and the leaf spring transmits movement of the screw to the spring link and the leaf spring to adjust the pressure exerted on the seismic element. The coefficients of expansion of the springs and the screw are matched to temperature compensate the preload adjustment means.
Inventors
- 👤 Jack A Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:07
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/125; G01P1/00; G01P1/006
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
197 words
In a transducer having a leaf spring with an end fixed to a support structure and a cantilevered free end, bearing means mounting an element to said free end for rotatable motion relative to said leaf spring, and an adjustment member movable along an axis to ultimately adjust the pressure exerted on said element by said leaf spring, the improvement comprising: link spring means having a first portion and a second portion spaced therefrom, said link spring flexing when pressure is applied to said second portion to exert pressure which produces movement of said first portion; means mounting said first portion of said link spring to said leaf spring at a point between said fixed end and said free end for flexing said leaf spring in response to movement of said first portion caused by pressure applied to said second portion of said link spring; and means mounting said adjustment member for movement along an axis bearing against said second portion of said link spring to apply pressure which flexes said link spring and produce movement of said first portion of said link spring, thereby flexing said leaf spring to adjust the pressure exerted on said element.
Claim 2
Dependent Claim
197 words
In a transducer having a leaf spring with an end fixed to a support structure and a cantilevered free end, bearing means mounting an element to said free end for rotatable motion relative to said leaf spring, and an adjustment member movable along an axis to ultimately adjust the pressure exerted on said element by said leaf spring, the improvement comprising: link spring means having a first portion and a second portion spaced therefrom, said link spring flexing when pressure is applied to said second portion to exert pressure which produces movement of said first portion; means mounting said first portion of said link spring to said leaf spring at a point between said fixed end and said free end for flexing said leaf spring in response to movement of said first portion caused by pressure applied to said second portion of said link spring; and means mounting said adjustment member for movement along an axis bearing against said second portion of said link spring to apply pressure which flexes said link spring and produce movement of said first portion of said link spring, thereby flexing said leaf spring to adjust the pressure exerted on said element.
Claim 3
Dependent Claim
100 words
The transducer of claim 1 wherein said adjustment member comprises a screw member threaded into a bore in said support structure along an axis which extends at an angle to an axis perpendicular to the plane of the leaf spring and coinciding with the axis of rotation of said element, the first and second portions of said link spring being at an angle with respect to each other to form a lever member which transfers axial forces from said screw member to said leaf spring to cause flexure of the leaf spring along said axis perpendicular to the plane thereof.
Claim 4
Dependent Claim
34 words
The transducer of claim 2 wherein said link spring has a width covering a substantial portion of the width of said leaf spring to prevent twisting of saId leaf spring along its cantilevered extent.
Claim 5
Dependent Claim
32 words
The transducer of claim 3 wherein said link spring has a thickness greater than the thickness of said leaf spring to further prevent twisting of said leaf spring along its cantilevered extent.
Claim 6
Dependent Claim
106 words
The transducer of claim 2 wherein the axis of said bore extends generally parallel to a line which passes through said fixed end of the leaf spring and a point of rotatable connection between said element and the free end of said leaf spring, said link spring comprises a generally L-shaped lever with said second portion extending generally perpendicular to and overlying an end of said screw member and said first portion being generally flush with said leaf spring, whereby axial movement of the screw member towards said second portion of the L-shaped lever flexes the lever and moves said leaf spring along said perpendicular axis.
Claim 7
Dependent Claim
42 words
The transducer of claim 5 wherein said L-shaped lever includes a juncture between said first and second portions, a part of said first portion spaced from said juncture being fixed to said support structure adjacent said fixed end of said leaf spring.
Claim 8
Dependent Claim
53 words
The transducer of claim 1 wherein at least a part of said first portion extends parallel to the axis of movement of said adjustment member, said adjustment member and at least said parallel extending part of said link spring being formed of materials with similar coefficients of expansion, thereby temperature compensating said transducer.
Claim 9
Dependent Claim
25 words
The transducer of claim 7 wherein the material of said parallel extending part of said link spring is the same material forming said leaf spring.
Claim 10
Dependent Claim
85 words
The transducer of claim 7 wherein said link spring is generally L-shaped and said second portion extends generally perpendicular to said extending part and overlies an end of said adjustment member, said adjustment member comprises a screw member threaded into a bore in said support structure on an axis which extends generally parallel to the axis of said parallel extending part, an end of said screw member abutting said second portion of said link spring, said extending part being generally flush with said leaf spring.
Claim 11
Dependent Claim
45 words
The transducer of claim 1 wherein said bearing means includes means defining a socket on the free end of said leaf spring and projection means on said element and extending into said socket providing a free pivot mounting between the element and the leaf spring.
Claim 12
Dependent Claim
19 words
The transducer of claim 10 wherein said socket is generally rounded and concave, and said projection means is pointed.
Claim 13
Dependent Claim
55 words
The transducer of claim 1 including a spaced pair of said leaf springs and adjustment members, the bearing means for the pair of leaf springs defining therebetween an axis of rotation for said element, said pair of leaf springs bearing against said element in opposite directions to provide a balanced preload pressure on said element.
References Cited (Backward Citations)
US2883176A
Cited
US3246525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |