US3650599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring instrument and reading device assembly
Assignee: Individual
•
Filing: 1971-01-28
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Granted: 1972-03-21
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Expires: 1991-01-28
Abstract
Abstract A clock is provided with a curved mirror encircling the scale of the clock, a further mirror is secured to the end of the shaft carrying the pointer of the clock and both mirrors are inclined with respect to the dial of the clock, a magnifying glass is positioned above the mirror secured to the shaft for magnifying the image of the end of the pointer and the section of the scale adjacent the pointer in the actual position thereof, reflected by the mirrors through the magnifying glass.
Inventors
- 👤 Carl Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:06
CPC Classifications
G; G04; G04B; G04B39/00; G04B39/008; G04B19/00; G04B19/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
Measuring instrument and reading device assembly, comprising a shaft to which a pointer is secured, said shaft being rotatable in accordance with the quantity to be measured, a scale arranged coaxially with said shaft and a magnifying glass for magnifying the image of the scale and the pointer, wherein a curved mirror is arranged coaxially with said shaft at the remote sidE of the scale with respect to the shaft and with the reflecting surface of said mirror facing said shaft and inclined towards said shaft, a further mirror secured to said shaft in a position such that a light beam received by the reflecting surface of said further mirror from said curved mirror and extending in the plane defined by said shaft and said pointer is reflected in the axial direction of said shaft, said magnifying glass being supported with the axis thereof coincident with the axis of said shaft.
Claim 2
Dependent Claim
151 words
Measuring instrument and reading device assembly, comprising a shaft to which a pointer is secured, said shaft being rotatable in accordance with the quantity to be measured, a scale arranged coaxially with said shaft and a magnifying glass for magnifying the image of the scale and the pointer, wherein a curved mirror is arranged coaxially with said shaft at the remote sidE of the scale with respect to the shaft and with the reflecting surface of said mirror facing said shaft and inclined towards said shaft, a further mirror secured to said shaft in a position such that a light beam received by the reflecting surface of said further mirror from said curved mirror and extending in the plane defined by said shaft and said pointer is reflected in the axial direction of said shaft, said magnifying glass being supported with the axis thereof coincident with the axis of said shaft.
References Cited (Backward Citations)
US1726314A
Cited
US2430616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |