US4763097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement transformer
Assignee: Mannesmann VDO AG
•
Filing: 1986-02-18
•
Granted: 1988-08-09
•
Expires: 2006-02-18
Abstract
Abstract A measurement transformer has a pressure chamber which is sealed off by a membrane (2). On the membrane (2) there is seated a ram (16) which rests against a central part (7) of a spring plate (6). The central part (7) is connected by means of two flexural beam sections (9, 10) with the edge of the spring plate (6). Furthermore, web sections (13, 14, 15) connect the central part (7) to the edge part (8). For the adjustment of the measurement transformer the web sections (13, 14, 15) can be cut through. The more web sections (13, 14, 15) are cut through, the easier it is for the central part (7) to be displaced relative to the edge part (8). Wire strain gauges (11, 12) on the beam sections (9, 10) register this displacement.
Inventors
- 👤 Bernhard Kant
- 👤 Wolfgang Porth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L9/006; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01L1/2231; G01L1/26
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
133 words
A measurement transformer having at least one flexural beam onto which a wire strain gauge is applied, and wherein said transformer comprises a spring plate having an inner portion and an outer portion, and a set of webs extending across a space between said inner portion and said outer portion for interconnecting said inner portion with said outer potion, said flexural beam being formed as an extension of said inner portion; the configuration of said set of webs with said inner portion and said outer portion constituting means for allowing a cutting away of a portion of a web to reduce its load-bearing cross section so as to permit the elasticity of the flexural beam to be varied by a reduction in its load-bearing cross section subsequent to deployment of said measurement transformer.
Claim 2
Dependent Claim
133 words
A measurement transformer having at least one flexural beam onto which a wire strain gauge is applied, and wherein said transformer comprises a spring plate having an inner portion and an outer portion, and a set of webs extending across a space between said inner portion and said outer portion for interconnecting said inner portion with said outer potion, said flexural beam being formed as an extension of said inner portion; the configuration of said set of webs with said inner portion and said outer portion constituting means for allowing a cutting away of a portion of a web to reduce its load-bearing cross section so as to permit the elasticity of the flexural beam to be varied by a reduction in its load-bearing cross section subsequent to deployment of said measurement transformer.
Claim 3
Dependent Claim
22 words
The measurement transformer according to claim 1, wherein the flexural beam is formed with incisions located to permit adjustment in their length.
Claim 4
Dependent Claim
22 words
The measurement transformer according to claim 1, wherein the flexural beam is formed with detents located to permit adjustment in their length.
Claim 5
Dependent Claim
22 words
The measurement transformer according to claim 1, wherein the flexural beam is formed with incisions located to permit adjustment in their width.
Claim 6
Dependent Claim
22 words
The measurement transformer according to claim 1, wherein the flexural beam is formed with detents located to permit adjustment in their width.
Claim 7
Dependent Claim
55 words
The measurement transformer according to claim 1, wherein the measurement transformer further comprises a pressure chamber which is sealed off by a membrane; said transformer further comprising a ram disposed on the outside of the pressure chamber and resting against the membrane; and a centrally located structural part which is connected to the flexural beam.
Claim 8
Dependent Claim
68 words
The measurement transformer according to claim 1, wherein said spring plate is circular, said inner portion and said outer portion being concentric circular parts of which said inner portion is a central part and said outer potion is an edge part, there being two spoke-like flexural-beam sections and separate web sections of said set of webs connecting said central part to said edge part of the spring plate.
Claim 9
Dependent Claim
62 words
The measurement transformer according to claim 7, wherein said transformer further comprises a pressure chamber sealed off by a membrane, a rigid mounting ring, and a plurality of balls; and wherein said spring plate is positioned on said mounting ring, and said mounting ring rests via said balls above the membrane, said membrane being disposed on a housing of the pressure chamber.
Claim 10
Dependent Claim
136 words
A measurement transformer for connection with force-producing apparatus to measure a force thereof, said transformer comprising: a strain guage; a spring plate cut out to form a set of radially extending webs, said plate having an inner portion and an outer perimetric portion, said webs extending from said inner portion to said outer portion, a central part of said plate defining a flexible beam, said strain guage being secured to said beam for flexing therewith; and means for applying a force normal to said plate to flex said plate for measurement of the force; and wherein said webs are sufficiently thin as measured in a direction of application of said force, to permit a cutting of at least one of said webs for adjusting a measurement range of said transformer subsequent to connection with said apparatus.
Claim 11
Dependent Claim
136 words
A measurement transformer for connection with force-producing apparatus to measure a force thereof, said transformer comprising: a strain guage; a spring plate cut out to form a set of radially extending webs, said plate having an inner portion and an outer perimetric portion, said webs extending from said inner portion to said outer portion, a central part of said plate defining a flexible beam, said strain guage being secured to said beam for flexing therewith; and means for applying a force normal to said plate to flex said plate for measurement of the force; and wherein said webs are sufficiently thin as measured in a direction of application of said force, to permit a cutting of at least one of said webs for adjusting a measurement range of said transformer subsequent to connection with said apparatus.
Claim 12
Dependent Claim
33 words
The measurement transformer according to claim 9, further comprising a mounting ring, said perimetric portion of said plate being secured to said ring for resisting said force during a flexing of said plate.
Claim 13
Dependent Claim
12 words
The measurement transformer according to claim 10, wherein said webs are coplanar.
Claim 14
Dependent Claim
19 words
The measurement transformer according to claim 11, wherein said webs are symmetrically arranged about a center of said plate.
Claim 15
Dependent Claim
12 words
The measurement transformer according to claim 12, wherein said ring is circular.
Claim 16
Dependent Claim
18 words
The measurement transformer according to claim 13, wherein said beam is broader than any one of said webs.
Claim 17
Dependent Claim
15 words
The measurement transformer according to claim 14, wherein said beam extends diametrically across said plate.
Claim 18
Dependent Claim
20 words
The measurement transformer according to claim 15, wherein said inner portion is bound by circular edges concentric with said ring.
Claim 19
Dependent Claim
22 words
The measurement transformer according to claim 16, wherein said force applying means comprises a ram connected to the center of said plate.
Claim 20
Dependent Claim
19 words
The measurement transformer according to claim 9, wherein said webs are uniformly thick, both before and after said cutting.
Claim 21
Dependent Claim
27 words
The measurement transformer according to claim 18, wherein there is an even number of said webs to permit a cutting of symmetrically located pairs of said webs.
Claim 22
Independent Claim
174 words
A method for the measurement of force by use of a measurement transformer including an electric strain guage secured to a flexible beam which can be flexed by the force upon connection of the beam to a force-producing apparatus, a flexing of the beam producing an electric signal from the strain guage, the method comprising the steps of: forming a spring plate with portions cut out to produce webs, said plate having an inner portion and an outer perimetric portion, said webs extending from said inner portion to said outer portion, a central part of said plate defining said flexible beam; mechanically connecting said plate to said apparatus to receive said force for bending said beam, said webs being sufficiently thin to flex with said beam and to permit a cutting of at least one of said webs; electrically connecting said strain guage for receipt of an electrical signal therefrom; and subsequently cutting at least one of said webs to vary elasticity of said plate for adjustment of a measurement range of said transformer.
Claim 23
Independent Claim
174 words
A method for the measurement of force by use of a measurement transformer including an electric strain guage secured to a flexible beam which can be flexed by the force upon connection of the beam to a force-producing apparatus, a flexing of the beam producing an electric signal from the strain guage, the method comprising the steps of: forming a spring plate with portions cut out to produce webs, said plate having an inner portion and an outer perimetric portion, said webs extending from said inner portion to said outer portion, a central part of said plate defining said flexible beam; mechanically connecting said plate to said apparatus to receive said force for bending said beam, said webs being sufficiently thin to flex with said beam and to permit a cutting of at least one of said webs; electrically connecting said strain guage for receipt of an electrical signal therefrom; and subsequently cutting at least one of said webs to vary elasticity of said plate for adjustment of a measurement range of said transformer.
Claim 24
Dependent Claim
24 words
The method according to claim 20, wherein said cutting is performed on pairs of said webs symmetrically positioned about a center of said plate.
Claim 25
Dependent Claim
22 words
The method according to claim 21, wherein said forming includes buttressing said perimetric portion with a circumferential ring contiguous said perimetric portion.
Claim 26
Dependent Claim
47 words
The method according to claim 22, wherein said webs are uniformly thick and extend radially outward from said center of said plate, said webs lying in a plane parallel to a plane of said beam, said cutting being done between said inner portion and said perimetric portion.
References Cited (Backward Citations)
US25924A
Cited
USRE25924E
Cited
US3022672A
Cited
US3138027A
Cited
US3204463A
Cited
US3520191A
Cited
US3869906A
Cited
US4017819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |