Patent US3590933A successfully refreshed from Google Patents.
US3590933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weigh beams
Assignee: Driver Southall Ltd
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Filing: 1968-12-16
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Granted: 1971-07-06
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Expires: 1988-12-16
Abstract
Abstract A weighing apparatus comprising a pair of beam members, each having a load or resistant carrying portion which extends on the same side of the fixed supporting fulcra of the beam members, said beam members being interconnected so that deflection in one direction of the said portion of one of the members causes deflection of the like portion of the other member in the opposite direction. The beam members each operate as one arm or half-beam of a balance (which may be of Roberval type) and which is of compact construction and has low sensitivity to external vibration.
Inventors
- 👤 Arthur Walter Forman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:56
CPC Classifications
G; G01; G01G; G01G1/00; G01G1/18; G01G1/24; G01G1/243; G01G1/246; G01G21/00; G01G21/14; G01G21/16; G01G21/161; G01G21/24; G01G21/244; G01G23/00; G01G23/18; G01G23/32; G01G3/00; G01G3/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
113 words
Weighing apparatus comprising fixed support means, upper and lower beam members having their one ends mounted on respective upper and lower fulcra on said support means, one, of said beam members carrying a load to be weighed, the other of said beam members providing a weight offsetting means, both of said beam members extending away from said fulcra in the same direction from the same side of said support means, upper and lower arms rigid with said upper and lower beam members respectively, and linkage means interconnecting said arms so that deflection in one direction of one of said beam members causes deflection in the opposite direcTion thereto of the other beam member.
Claim 2
Dependent Claim
113 words
Weighing apparatus comprising fixed support means, upper and lower beam members having their one ends mounted on respective upper and lower fulcra on said support means, one, of said beam members carrying a load to be weighed, the other of said beam members providing a weight offsetting means, both of said beam members extending away from said fulcra in the same direction from the same side of said support means, upper and lower arms rigid with said upper and lower beam members respectively, and linkage means interconnecting said arms so that deflection in one direction of one of said beam members causes deflection in the opposite direcTion thereto of the other beam member.
Claim 3
Dependent Claim
15 words
Weighing apparatus as defined in claim 1, wherein said support means is an upright member.
Claim 4
Dependent Claim
26 words
Weighing apparatus according to claim 1 wherein the interconnected arms are crank arms so arranged relative to each other that the linkage therebetween is in compression.
Claim 5
Dependent Claim
37 words
Weighing apparatus according to claim 1 in which at least a part of the offsetting means used to balance a load applied thereto is provided by spring means operating on the beam members to resist deflection thereof.
Claim 6
Dependent Claim
26 words
Weighing apparatus as defined in claim 1, wherein damping means is connected between two relatively moving parts associated respectively with the upper and lower beam members.
Claim 7
Dependent Claim
74 words
Weighing apparatus according to claim 1 wherein at least one of the beam members forms one side of a parallelogrammic linkage also comprising a vertical leg through which the load or resistant is applied thereto, and a stay extending parallel to the beam member between said leg and a fixed support to maintain the leg in a vertical position, so that the linkage operates as one arm or half-beam of a Roberval type balance.
Claim 8
Dependent Claim
44 words
Weighing apparatus according to claim 6 wherein said both beam members form parts of parallelogrammic linkages each operating as one arm or half beam of a Roberval type balance so that the interconnected beam members are effective as an equal armed Roberval type balance.
Claim 9
Dependent Claim
26 words
Weighing apparatus according to claim 1 wherein the interconnected arms are crank arms so arranged relative to each other that the linkage therebetween is in tension.
Claim 10
Dependent Claim
24 words
Weighing apparatus according to claim 8 including at least one beam member fulcrum, parallelogrammic linkage pivot or interconnecting link pivot comprising a flexure strip.
Claim 11
Dependent Claim
11 words
Weighing apparatus according to claim 9 having two crossed flexure strips.
Claim 12
Dependent Claim
16 words
Weighing apparatus according to claim 1 including indicating means for detecting deflection of the beam members.
Claim 13
Dependent Claim
22 words
Weighing apparatus according to claim 11 wherein the indicating means detects relative movement between one beam member and the other beam member.
Claim 14
Dependent Claim
13 words
Weighing apparatus according to claim 11 wherein the indicating means includes a transducer.
Claim 15
Dependent Claim
15 words
Weighing apparatus according to claim 13 wherein the transducer is a linear variable differential transformer.
Claim 16
Dependent Claim
47 words
Weighing apparatus according to claim 11 wherein the indicating means includes at least one movable mirror connected to at least one of the moving parts of the device so as to vary the path of a ray of light in accordance with deflection of the beam members.
Claim 17
Dependent Claim
27 words
Weighing apparatus according to claim 15 wherein a linkage of the mirror to relatively moving parts of the apparatus serves both to tilt and support the mirror.
Claim 18
Dependent Claim
42 words
Weighing apparatus according to claim 16 wherein the linkage consists of flexible strips arranged so that the mirror is tilted about an imaginary axis across its face midway between its top and bottom edges and normal to the direction of relative movement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |