Patent US3876191A successfully refreshed from Google Patents.
US3876191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace ladling apparatus and crucible
Assignee: Sola Basic Industries Inc
•
Filing: 1973-03-15
•
Granted: 1975-04-08
•
Expires: 1993-03-15
Abstract
Abstract A furnace ladling apparatus comprises a crucible mounted in a furnace and having an inlet passage and delivery tube disposed within the crucible adjacent a side wall thereof. A delivery spout extends from an opening communicating with the delivery tube in the upper end of the crucible. A pair of reference electrodes are spaced along one side of the passage in the delivery spout so as to be responsive to the level of molten metal in the spout. Shot timer means are connected to the reference electrodes so that the timer is actuated when the molten metal reaches the reference electrodes in the delivery spout so as to provide a predetermined amount of metal.
Inventors
- 👤 Duane H Lauersdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:58
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/14; B; B22; B22D; B22D17/00; B22D17/20; B22D17/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
In a furnace ladling apparatus, the combination including a hollow chamber to contain molten metal, a crucible in said chamber, means in said crucible and integral therewith defining a molten metal inlet therein, a delivery tube within said crucible and integral therewith having its upper end terminating above the normal level of molten metal in the chamber, a delivery spout in fixed position on said crucible and communicating with the delivery tube upper end, and means in said delivery spout responsive to the level of molten metal therein, said metal inlet and delivery tubes comprising means defining vertically extending passages within the crucible, the vertical passages being positioned adjacent each other and to the inner face of the side wall of said crucible.
Claim 2
Dependent Claim
123 words
In a furnace ladling apparatus, the combination including a hollow chamber to contain molten metal, a crucible in said chamber, means in said crucible and integral therewith defining a molten metal inlet therein, a delivery tube within said crucible and integral therewith having its upper end terminating above the normal level of molten metal in the chamber, a delivery spout in fixed position on said crucible and communicating with the delivery tube upper end, and means in said delivery spout responsive to the level of molten metal therein, said metal inlet and delivery tubes comprising means defining vertically extending passages within the crucible, the vertical passages being positioned adjacent each other and to the inner face of the side wall of said crucible.
Claim 3
Dependent Claim
122 words
A crucible for a furnace ladling apparatus comprising a substantially cylindrical body having top and bottom ends adapted to be placed in a metal holding furnace, means in said crucible defining a first integral vertically extending passage opening at the bottom of the crucible for a molten metal inlet, means in said crucible defining a second integral vertically extending passage having its upper end terminating above the normal level of molten metal within the furnace for the delivery of molten metal from the crucible, said passage defining means being against the inner face of the crucible body wall, and said inlet passage and said delivery tube are positioned adjacent each other against the inner face of the cylindrical wall of the crucible.
Claim 4
Dependent Claim
122 words
A crucible for a furnace ladling apparatus comprising a substantially cylindrical body having top and bottom ends adapted to be placed in a metal holding furnace, means in said crucible defining a first integral vertically extending passage opening at the bottom of the crucible for a molten metal inlet, means in said crucible defining a second integral vertically extending passage having its upper end terminating above the normal level of molten metal within the furnace for the delivery of molten metal from the crucible, said passage defining means being against the inner face of the crucible body wall, and said inlet passage and said delivery tube are positioned adjacent each other against the inner face of the cylindrical wall of the crucible.
References Cited (Backward Citations)
US1689698A
Cited
US1856352A
Cited
US2397512A
Cited
US2937789A
Cited
US3050794A
Cited
US3708088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |