US3717210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balance
Assignee: Stamicarbon BV
•
Filing: 1971-03-25
•
Granted: 1973-02-20
•
Expires: 1991-03-25
Abstract
Abstract A thermogravimetric balance comprising a vertically disposed load carrying arm connected at each end through tension wires to first and second horizontally disposed balance arms connected at their mid-points to tension strips or wires. The other ends of the balance arms are linked through tension wires to a connecting element so that the balance arms, load carrying arm and connecting element comprise a vertically disposed parallelogram. Rotation of said first balance arm out of its equilibrium position will actuate a control circuit which will effect the application of a restoring movement to the balance arm, the amount of current required to restore the balance arm being used as a measure of the weight value. Dimensional variations due to temperature changes in the load carrying arm are compensated for by effecting compensating movement in the parallelogram structure.
Inventors
- 👤 B Sieswerda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:28
CPC Classifications
G; G01; G01G; G01G7/00; G01G7/02; G01G7/04; G01G1/00; G01G3/00; G01G3/10; Y; Y10; Y10S; Y10S177/00; Y10S177/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
A balance comprising a balance arm suspended at a point between the ends on a horizontal tension strip, and a load carrying member which, by means of a suspensory tension wire, is connected with said arm, characterized by a second arm suspended on a tension strip, the two arms constituting opposite sides of a parallelogram disposed to lie in a vertical plane whose two other sides are formed by connecting elements at least one of which is rigid and constructed to form the load carrying member, and in that two adjacent sides of the parallelogram are connected to each other by means of a tension wire, which, intersecting the said plane, is secured to duplicate parts of one of the sides, said duplicate parts being equally spaced on opposite sides of the plane and, at a point intermediate between the ends of said tension wire, is secured to the other side, said load carrying member having a horizontal load arm, the end of which extends into an enclosure for thermal treatment of the load.
Claim 2
Dependent Claim
174 words
A balance comprising a balance arm suspended at a point between the ends on a horizontal tension strip, and a load carrying member which, by means of a suspensory tension wire, is connected with said arm, characterized by a second arm suspended on a tension strip, the two arms constituting opposite sides of a parallelogram disposed to lie in a vertical plane whose two other sides are formed by connecting elements at least one of which is rigid and constructed to form the load carrying member, and in that two adjacent sides of the parallelogram are connected to each other by means of a tension wire, which, intersecting the said plane, is secured to duplicate parts of one of the sides, said duplicate parts being equally spaced on opposite sides of the plane and, at a point intermediate between the ends of said tension wire, is secured to the other side, said load carrying member having a horizontal load arm, the end of which extends into an enclosure for thermal treatment of the load.
Claim 3
Dependent Claim
174 words
A balance comprising a balance arm suspended at a point between the ends on a horizontal tension strip, and a load carrying member which, by means of a suspensory tension wire, is connected with said arm, characterized by a second arm suspended on a tension strip, the two arms constituting opposite sides of a parallelogram disposed to lie in a vertical plane whose two other sides are formed by connecting elements at least one of which is rigid and constructed to form the load carrying member, and in that two adjacent sides of the parallelogram are connected to each other by means of a tension wire, which, intersecting the said plane, is secured to duplicate parts of one of the sides, said duplicate parts being equally spaced on opposite sides of the plane and, at a point intermediate between the ends of said tension wire, is secured to the other side, said load carrying member having a horizontal load arm, the end of which extends into an enclosure for thermal treatment of the load.
Claim 4
Dependent Claim
174 words
A balance comprising a balance arm suspended at a point between the ends on a horizontal tension strip, and a load carrying member which, by means of a suspensory tension wire, is connected with said arm, characterized by a second arm suspended on a tension strip, the two arms constituting opposite sides of a parallelogram disposed to lie in a vertical plane whose two other sides are formed by connecting elements at least one of which is rigid and constructed to form the load carrying member, and in that two adjacent sides of the parallelogram are connected to each other by means of a tension wire, which, intersecting the said plane, is secured to duplicate parts of one of the sides, said duplicate parts being equally spaced on opposite sides of the plane and, at a point intermediate between the ends of said tension wire, is secured to the other side, said load carrying member having a horizontal load arm, the end of which extends into an enclosure for thermal treatment of the load.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |