US3566984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam spring balance with rigidity-controlling equalizer spring
Assignee: Sartorius Werke GmbH
•
Filing: 1969-09-26
•
Granted: 1971-03-02
•
Expires: 1989-09-26
Abstract
Abstract A spring balance having a balance beam, at least one spring acting on the balance beam and absorbing the load torque, and an arrangement for adapting the balance to changes in the force of gravity. The arrangement comprises at least one equalizer spring one end of which is connected to the balance support mounting by means of a device for changing the length thereof and the other end of the equalizer spring is fastened on the beam, or on a part of the balance connected to the beam for common movement. The arrangement is such that the direction of force of the equalizer spring in the neutral position of the balance extends approximately at right angles to the direction of movement of the fastening point on the balance beam or balance part and, with the balance loaded, a force component of the equalizer spring exerts on the balance beam torque directed against its deflection by the load whereby the rigidity of the spring system can be changed.
Inventors
- 👤 Ludwig Weickhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:46
CPC Classifications
G; G01; G01G; G01G3/00; G01G3/02; G01G3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A spring balance comprising an inclination means which comprises a balance beam, a balance support mounting, a load dish, and means supporting said load dish on said inclination means, first spring means with one end thereof being fixed and the other end acting on the inclination means and absorbing the load torque, equalizer spring means, means for changing the effective length of said equalizer spring means and for connecting one end of said equalizer spring means to said balance support mounting, means fastening to the other end of the equalizer spring means to the inclination means whereby the direction of force of the equalizer spring means in the neutral position of the balance extends approximately at right angles to the direction of movement of the fastening point of said equalizer spring means to said inclination means and, with the balance loaded, a force component of the equalizer spring means exerts on the balance beam a torque directed against its deflection by the load whereby the rigidity of the spring system can be changed.
Claim 2
Dependent Claim
173 words
A spring balance comprising an inclination means which comprises a balance beam, a balance support mounting, a load dish, and means supporting said load dish on said inclination means, first spring means with one end thereof being fixed and the other end acting on the inclination means and absorbing the load torque, equalizer spring means, means for changing the effective length of said equalizer spring means and for connecting one end of said equalizer spring means to said balance support mounting, means fastening to the other end of the equalizer spring means to the inclination means whereby the direction of force of the equalizer spring means in the neutral position of the balance extends approximately at right angles to the direction of movement of the fastening point of said equalizer spring means to said inclination means and, with the balance loaded, a force component of the equalizer spring means exerts on the balance beam a torque directed against its deflection by the load whereby the rigidity of the spring system can be changed.
Claim 3
Dependent Claim
58 words
A spring balance as claimed in claim 1, further comprising a tension spring constituting the equalizer spring which acts on the balance beam, the direction of force of said eQualizer spring in the neutral position of the balance falling into a straight line intersecting the support bearing, both ends of said tension spring being outside the support bearing.
Claim 4
Dependent Claim
37 words
A spring balance as claimed in claim 2, wherein the end of the equalizer spring fixed on the balance frame is further spaced from said support bearing than the equalizer spring end fastened to the balance beam.
Claim 5
Dependent Claim
67 words
A spring balance as claimed in claim 1, further comprising a parallelogram guidance system including a guide rod and a stationary bearing therefor, a tension spring constituting the equalizer spring, the direction of force of the equalizer spring in the neutral position of the balance falling into a straight line intersecting the stationary bearing of the guide rod, both equalizer spring ends being outside of this bearing.
Claim 6
Dependent Claim
33 words
A spring balance as claimed in claim 4, wherein the spring end fixed on the balance frame is further spaced from said stationary bearing than the spring end fastened to the guide rod.
Claim 7
Dependent Claim
92 words
A spring balance as claimed in claim 1, further comprising a parallelogram guidance system, a part vertically conducted by said guidance system, a tension spring constituting the equalizer spring, means one end of said equalizer spring means fastened at said vertically conducted part, the force direction of the equalizer spring means in the neutral position of the balance extending horizontally, and the end of the equalizer spring means fixed on the balance frame acting at a point outside of a vertical plane, which contains the stationary axes of the parallelogram guidance system.
Claim 8
Dependent Claim
38 words
A spring balance as claimed in claim 6, wherein the end of the equalizer spring means fixed on the balance frame lies, considered from said plane, on the opposite side of the vertically conducted part of the balance.
References Cited (Backward Citations)
GB1052721A
Cited
US1806741A
Cited
US1576948A
Cited
US2681566A
Cited
US2681222A
Cited
FR61730E
Cited
GB732744A
Cited
US2698747A
Cited
US3287721A
Cited
US3373830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |