US3894593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighing scale
Assignee: Reliance Electric Co
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Filing: 1974-05-15
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Granted: 1975-07-15
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Expires: 1994-05-15
Abstract
Abstract A weighing scale with improved parallel guidance mechanism including five two-force members which constrain two linear degrees of freedom and the three angular degrees of freedom of the scale''s weigh platter. The five two-force members are check links so arranged in space that five of the six possible degrees of freedom of a body in space, i.e., the weight platter, are constrained leaving the sixth degree of freedom for use in force measurement. The scale also features novel adjustment means for ensuring that a given load weighs the same in all locations on the platter.
Inventors
- 👤 Donivan L Hall
- 👤 Walter E Kupper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:04
CPC Classifications
G; G01; G01G; G01G21/00; G01G21/24; G01G21/244
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receiving means for movement of the load receiving means in a substantially vertical path, the load receiving means having a load applying portion spaced vertically from the transducer means, and means for varying the vertical distance between the load applying portion and the transducer means for adjusting the linearity of errors caused by shifting loads upon the load receiving means.
Claim 2
Dependent Claim
96 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receiving means for movement of the load receiving means in a substantially vertical path, the load receiving means having a load applying portion spaced vertically from the transducer means, and means for varying the vertical distance between the load applying portion and the transducer means for adjusting the linearity of errors caused by shifting loads upon the load receiving means.
Claim 3
Dependent Claim
113 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means parallel to the frame means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receIving means for movement of the load receiving means in a substantially vertical path, the load receiving means having a load applying portion spaced vertically from the transducer means, means for varying the vertical distance between the load applying portion and the transducer means for adjusting the linearity of errors caused by shifting loads upon the load receiving means, and means for adjusting the check link means to cancel said linear errors.
Claim 4
Dependent Claim
113 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means parallel to the frame means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receIving means for movement of the load receiving means in a substantially vertical path, the load receiving means having a load applying portion spaced vertically from the transducer means, means for varying the vertical distance between the load applying portion and the transducer means for adjusting the linearity of errors caused by shifting loads upon the load receiving means, and means for adjusting the check link means to cancel said linear errors.
Claim 5
Dependent Claim
120 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receiving means for movement of the load receiving means in a substantially vertical path, first adjustment means for making linear the errors caused by moving loads through the center of the load receiving means parallel to the check link means to a plurality of other locations upon the load receiving means, and second adjustment means for making said loads produce the same weight signals when located in said center of the load receiving means and in said other locations upon the load receiving means.
Claim 6
Dependent Claim
120 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receiving means for movement of the load receiving means in a substantially vertical path, first adjustment means for making linear the errors caused by moving loads through the center of the load receiving means parallel to the check link means to a plurality of other locations upon the load receiving means, and second adjustment means for making said loads produce the same weight signals when located in said center of the load receiving means and in said other locations upon the load receiving means.
Claim 7
Dependent Claim
167 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receiving means for movement of the load receiving means in a substantially vertical path, first adjustment means for making linear the errors caused by moving loads through the center of the load receiving means parallel to the check link means to a plurality of other locations upon the load receiving means, second adjustment means for making said loads produce the same weight signals when located in said center of the load receiving means and in said other locations upon the load receiving means, the adjustment produced by said first adjustment means changing the zero setting of the scale and the adjustment produced by said second adjustment means not changing the zero setting of the scale, and third adjustment means operable after said two adjustments are made to make said zero setting.
Claim 8
Dependent Claim
167 words
A weighing scale comprising, in combination, stationary frame means, movable load receiving means, transducer means for producing weight signals in accordance with movement of the load receiving means, check link means connecting the frame and load receiving means for movement of the load receiving means in a substantially vertical path, first adjustment means for making linear the errors caused by moving loads through the center of the load receiving means parallel to the check link means to a plurality of other locations upon the load receiving means, second adjustment means for making said loads produce the same weight signals when located in said center of the load receiving means and in said other locations upon the load receiving means, the adjustment produced by said first adjustment means changing the zero setting of the scale and the adjustment produced by said second adjustment means not changing the zero setting of the scale, and third adjustment means operable after said two adjustments are made to make said zero setting.
References Cited (Backward Citations)
US3142349A
Cited
US3807517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |