Patent US3554157A successfully refreshed from Google Patents.
US3554157A
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Timer-indicator
Assignee: United States Steel Corp
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Filing: 1969-06-30
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Granted: 1971-01-12
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Expires: 1989-06-30
Abstract
Abstract A timer-indicator for an element concentration spectrometer has a straight indicating hand indexing on a direct reading calibrated spiral for the concentration. A curved second hand is mounted on a shaft concentric with the indicating hand shaft and is geared to move at 95 percent of the travel of the indicating hand. The curvature of the second hand provides continuous indexing of the intersection of the two hands along the spiral indicating the proper place on the spiral for the determined concentration.
Inventors
- 👤 Richard E Haughtington
- 👤 Earl H Shipley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:06
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
In a timer-indicator in which a radial indicating hand is rotated at a constant speed around the center of an indicating dial the length of time to be measured and in which the measured time is determined by the hand indexing on indicated increments of time marked on the circumference of the dial, the improvement comprising a spiral centered on said dial and having a number of revolutions at least as great as the expected revolutions of the indicating hand during a measurement period, a series of calibrations marked on said spiral, a second hand concentrically mounted with said indicating hand, and means to rotate said second hand at a speed slower than said indicating hand when said indicating hand rotates, said second hand having a curvature determined by the intersection of said indicating hand and said spiral progressing from one end of said spiral as said hands are rotated.
Claim 2
Dependent Claim
150 words
In a timer-indicator in which a radial indicating hand is rotated at a constant speed around the center of an indicating dial the length of time to be measured and in which the measured time is determined by the hand indexing on indicated increments of time marked on the circumference of the dial, the improvement comprising a spiral centered on said dial and having a number of revolutions at least as great as the expected revolutions of the indicating hand during a measurement period, a series of calibrations marked on said spiral, a second hand concentrically mounted with said indicating hand, and means to rotate said second hand at a speed slower than said indicating hand when said indicating hand rotates, said second hand having a curvature determined by the intersection of said indicating hand and said spiral progressing from one end of said spiral as said hands are rotated.
Claim 3
Dependent Claim
20 words
A timer-indicator according to claim 1 in which the indicating hand and the second hand rotate in the same direction.
Claim 4
Dependent Claim
31 words
A timer-indicator according to claim 2 in which the ratio between the speed of the indicating hand and the speed of the second hand is at least as small as 10:9.
Claim 5
Dependent Claim
12 words
A timer-indicator according to claim 3 in which said ratio is 20:19.
Claim 6
Dependent Claim
14 words
A timer-indicator according to claim 4 in which said calibrations are increments of time.
Claim 7
Dependent Claim
26 words
A timer-indicator according to claim 4 in which said time to be measured represents a spectrographically determined element concentration and said calibrations are percent element concentrations.
Claim 8
Dependent Claim
24 words
A timer-indicator according to claim 6 in which said second hand has indicating marks from the outermost spiral coverage to the innermost spiral coverage.
Claim 9
Dependent Claim
25 words
A timer-indicator according to claim 7 including means to replace one calibrated spiral representing an element concentration by another calibrated spiral representing another element concentration.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |