← Back to Patent Explorer
US3891040A Expired / Lapsed US ⏱️ 0.0 years remaining

Inclination spring balance

Assignee: Mettler Toledo GmbH Germany
•
Filing: 1973-01-26
•
Granted: 1975-06-24
•
Expires: 1993-01-26
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The helical tension spring which counteracts the weight of an object on the scale pan of an inclination balance is fixedly attached to one arm of the balance beam to avoid friction in the connection between the spring and the beam. The attachment permits the spring position to be adjusted along the beam and the effective length of the spring to be adjusted. The weighing errors resulting from buckling of the spring are compensated by a suitably modified scale from which the weight is read.

Inventors

  • 👤 Albert Schmitter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 15:10
CPC Classifications
G; G01; G01G; G01G1/00; G01G1/18; G01G1/24; G01G1/243; G01G1/246; G01G21/00; G01G21/24; G01G21/241; G01G23/00; G01G23/14; G01G23/18; G01G23/32; G01G3/00; G01G3/02

Claims Analysis

Total Claims: 28
Claim 1
Independent Claim 408 words
An inclination balance comprising, in combination: a. a support, said support being stationary in the normal operating condition of said balance; b. a balance beam mounted on said support for angular movement about a main bearing axis horizontal in said condition, 1. said beam having two arms extending from said axis in opposite directions; c. pan carrier means adapted to carry an object to be weighed; d. outer bearing means connecting said pan carrier means to one of said arms for pivotal movement about an outer bearing axis spacedly parallel to said main bearing axis, said axes jointly defining a plane; e. yieldably resilient means opposing angular movement of said beam about said main bearing axis under the weight of said object and including 1. a helical weighing spring having an axis and two axially spaced terminal portions, 2. first fastening means fastening one of said terminal portions to said support, and 3. second fastening means fixedly fastening the other terminal portion to the other arm of said beam, 4. said second fastening means including means preventing movement of said other terminal portion relative to said beam; and f. indicating means for indicating the angular position of said beam as a measure of said weight, said indicating means including a scale member and an index member, 1. one of said members being fixedly mounted on said support, and the other member being fixedly fastened on said other arm, 2. said scale member carrying a row of numerical weight marks spaced for sequential alignment with said index member during said angular movement of said beam, 3. said row of marks including a central mark and two groups of marks extending from said central mark in opposite directions and including respective terminal marks farthest from said central mark and respectively constituting a zero mark and a full-load mark, 4. said index member and said zero mark being aligned in said condition when said pan carrier means carries no object to be weighed, 5. said index member and said full-load mark being aligned in said condition when said pan carrier means carries an object having the full rated weight of said balance, 6. said index member and said central mark being aligned in said condition when said pan carrier means carries an object having one half of said full rated weight, 7. said plane being obliquely inclined relative to the horizontal when said index member and said central mark are aligned.
Claim 2
Dependent Claim 408 words
An inclination balance comprising, in combination: a. a support, said support being stationary in the normal operating condition of said balance; b. a balance beam mounted on said support for angular movement about a main bearing axis horizontal in said condition, 1. said beam having two arms extending from said axis in opposite directions; c. pan carrier means adapted to carry an object to be weighed; d. outer bearing means connecting said pan carrier means to one of said arms for pivotal movement about an outer bearing axis spacedly parallel to said main bearing axis, said axes jointly defining a plane; e. yieldably resilient means opposing angular movement of said beam about said main bearing axis under the weight of said object and including 1. a helical weighing spring having an axis and two axially spaced terminal portions, 2. first fastening means fastening one of said terminal portions to said support, and 3. second fastening means fixedly fastening the other terminal portion to the other arm of said beam, 4. said second fastening means including means preventing movement of said other terminal portion relative to said beam; and f. indicating means for indicating the angular position of said beam as a measure of said weight, said indicating means including a scale member and an index member, 1. one of said members being fixedly mounted on said support, and the other member being fixedly fastened on said other arm, 2. said scale member carrying a row of numerical weight marks spaced for sequential alignment with said index member during said angular movement of said beam, 3. said row of marks including a central mark and two groups of marks extending from said central mark in opposite directions and including respective terminal marks farthest from said central mark and respectively constituting a zero mark and a full-load mark, 4. said index member and said zero mark being aligned in said condition when said pan carrier means carries no object to be weighed, 5. said index member and said full-load mark being aligned in said condition when said pan carrier means carries an object having the full rated weight of said balance, 6. said index member and said central mark being aligned in said condition when said pan carrier means carries an object having one half of said full rated weight, 7. said plane being obliquely inclined relative to the horizontal when said index member and said central mark are aligned.
Claim 3
Dependent Claim 13 words
first fastening means fastening one of said terminal portions to said support, and
Claim 4
Dependent Claim 13 words
first fastening means fastening one of said terminal portions to said support, and
Claim 5
Dependent Claim 25 words
said scale member carrying a row of numerical weight marks spaced for sequential alignment with said index member during said angular movement of said beam,
Claim 6
Dependent Claim 25 words
said scale member carrying a row of numerical weight marks spaced for sequential alignment with said index member during said angular movement of said beam,
Claim 7
Dependent Claim 50 words
A balance as set forth in claim 1, wherein said plane is inclined at an angle of 1* to 5* relative to the horizontal and slopes upward from said main bearing axis to said outer bearing axis when said index member and said central mark are aligned in said condition.
Claim 8
Dependent Claim 15 words
A balance as set forth in claim 1, wherein, said spring is a tension spring.
Claim 9
Dependent Claim 41 words
said row of marks including a central mark and two groups of marks extending from said central mark in opposite directions and including respective terminal marks farthest from said central mark and respectively constituting a zero mark and a full-load mark,
Claim 10
Dependent Claim 41 words
said row of marks including a central mark and two groups of marks extending from said central mark in opposite directions and including respective terminal marks farthest from said central mark and respectively constituting a zero mark and a full-load mark,
Claim 11
Dependent Claim 16 words
second fastening means fixedly fastening the other terminal portion to the other arm of said beam,
Claim 12
Dependent Claim 16 words
second fastening means fixedly fastening the other terminal portion to the other arm of said beam,
Claim 13
Dependent Claim 46 words
said second fastening means including means preventing movement of said other terminal portion relative to said beam; and f. indicating means for indicating the angular position of said beam as a measure of said weight, said indicating means including a scale member and an index member,
Claim 14
Dependent Claim 46 words
said second fastening means including means preventing movement of said other terminal portion relative to said beam; and f. indicating means for indicating the angular position of said beam as a measure of said weight, said indicating means including a scale member and an index member,
Claim 15
Dependent Claim 23 words
said index member and said zero mark being aligned in said condition when said pan carrier means carries no object to be weighed,
Claim 16
Dependent Claim 23 words
said index member and said zero mark being aligned in said condition when said pan carrier means carries no object to be weighed,
Claim 17
Dependent Claim 89 words
A balance as set forth in claim 1, wherein the numerical weight value of each one of said marks satisfies the condition Delta P k tan Alpha , wherein Delta P is the difference in the numerical weight values of said one mark and of said central mark, k is a constant common to all marks on said scale, and Alpha is the angle between said plane, when in said position thereof, and said plane, when in the position assumed when said one mark is aligned with said index.
Claim 18
Dependent Claim 57 words
A balance as set forth in claim 3, further comprising an adjustable taring spring secured to said support and torque transmitting means connecting said taring spring to said one arm for exerting torque on said beam and for thereby biasing said beam to move angularly about said main bearing axis against the action of said weighing spring.
Claim 19
Dependent Claim 28 words
said index member and said full-load mark being aligned in said condition when said pan carrier means carries an object having the full rated weight of said balance,
Claim 20
Dependent Claim 28 words
said index member and said full-load mark being aligned in said condition when said pan carrier means carries an object having the full rated weight of said balance,
Claim 21
Dependent Claim 28 words
said index member and said central mark being aligned in said condition when said pan carrier means carries an object having one half of said full rated weight,
Claim 22
Dependent Claim 28 words
said index member and said central mark being aligned in said condition when said pan carrier means carries an object having one half of said full rated weight,
Claim 23
Dependent Claim 38 words
A balance as set forth in Claim 5, wherein said taring spring is a helical tension spring having an axis and two axial end portions, one of said end portions being fixedly fastened to said pan carrier means.
Claim 24
Dependent Claim 30 words
A balance as set forth in claim 1, wherein said second fastening means include means for adjusting the effective spacing of said other terminal portion from said main bearing axis.
Claim 25
Dependent Claim 19 words
said plane being obliquely inclined relative to the horizontal when said index member and said central mark are aligned.
Claim 26
Dependent Claim 19 words
said plane being obliquely inclined relative to the horizontal when said index member and said central mark are aligned.
Claim 27
Dependent Claim 37 words
A balance as set forth in claim 7, wherein one of said fastening means includes means for adjusting the spacing of said two terminal portions from each other while said beam is in a fixed angular position.
Claim 28
Dependent Claim 18 words
A balance as set forth in claim 8, wherein said one fastening means is said second fastening means.

References Cited (Backward Citations)

US1289885A Cited
US1559755A Cited
US1782654A Cited
US1953664A Cited
US2631838A Cited
US3055444A Cited
US3193030A Cited
US3382942A Cited
US3647010A Cited
US3698496A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-06-23 1978-12-23 1979-06-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-06-23 1982-12-23 1983-06-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-06-23 1986-12-23 1987-06-24 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag