US3088031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable collimator
Assignee: Allis Chalmers Corp
•
Filing: 1959-04-13
•
Granted: 1963-04-30
•
Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Henry J Varga
- 👤 Arthur N Haig
- 👤 William P Kirch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:11
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A COLLIMATOR COMPRISING A PLURALITY OF RELATIVELY MOVABLE RADIATION ABSORBING BLOCKS ARRANGED IN SETS OF TWO BLOCKS TO FORM AN APERTURE FOR GIVING A BEAM OF RADIATION A SELECTED PYRAMID SHAPED PATTERN WITH THE APEX OF THE PYRAMID AT THE FOCUS OF THE BEAM, EACH OF SAID BLOCK HAVING A SUBSTANTIALLY FLAT SURFACE FACING A DIFFERENT SIDE OF THE PYRAMID PATTERN AND EXTENDING ALONG THE PATH OF THE BEAM SUFFICIENTLY TO SATISFACTORILY ABSORB THE RADIATION IMMEDIATELY OUTSIDE THE PYRAMID PATTERN AND EXTENDING TRANSVERSE TO THE PATH OF THE BEAM SUFFICIENTLY FOR THE PORTION OF THE BEAM ABSORBED OUTSIDE EACH SAID SURFACE TO PARTIALLY OVERLAP THE PORTION ABSORBED OUTSIDE THE SURFACES OF THE BLOCKS FACING THE TWO ADJACENT SIDES OF THE PYRAMID, MEANS DEFINING ARCUATE PATHS CENTERED AT THE FOCUS OF THE BEAM, AND MEANS FOR MOVING THE TWO BLOCKS IN EACH OF SAID SETS ALONG ONE OF SAID ARCUATE PATHS TO INDEPENDENTLY VARY THE SPACING BETWEEN OPPOSITE SIDES OF THE PYRAMID PATTERN, EACH OF SAID SURFACES BEING PERPENDICULAR TO ITS DIRECTION ALONG AN ARCUATE PATH TO MAINTAIN SAID SURFACES PARALLEL WITH THE IMMEDIATELY ADJACENT SIDES OF THE PYRAMID PATTERN TO AVOID A PENUMBRA IN THE SELECTED PATTERN.
Claim 2
Dependent Claim
197 words
A COLLIMATOR COMPRISING A PLURALITY OF RELATIVELY MOVABLE RADIATION ABSORBING BLOCKS ARRANGED IN SETS OF TWO BLOCKS TO FORM AN APERTURE FOR GIVING A BEAM OF RADIATION A SELECTED PYRAMID SHAPED PATTERN WITH THE APEX OF THE PYRAMID AT THE FOCUS OF THE BEAM, EACH OF SAID BLOCK HAVING A SUBSTANTIALLY FLAT SURFACE FACING A DIFFERENT SIDE OF THE PYRAMID PATTERN AND EXTENDING ALONG THE PATH OF THE BEAM SUFFICIENTLY TO SATISFACTORILY ABSORB THE RADIATION IMMEDIATELY OUTSIDE THE PYRAMID PATTERN AND EXTENDING TRANSVERSE TO THE PATH OF THE BEAM SUFFICIENTLY FOR THE PORTION OF THE BEAM ABSORBED OUTSIDE EACH SAID SURFACE TO PARTIALLY OVERLAP THE PORTION ABSORBED OUTSIDE THE SURFACES OF THE BLOCKS FACING THE TWO ADJACENT SIDES OF THE PYRAMID, MEANS DEFINING ARCUATE PATHS CENTERED AT THE FOCUS OF THE BEAM, AND MEANS FOR MOVING THE TWO BLOCKS IN EACH OF SAID SETS ALONG ONE OF SAID ARCUATE PATHS TO INDEPENDENTLY VARY THE SPACING BETWEEN OPPOSITE SIDES OF THE PYRAMID PATTERN, EACH OF SAID SURFACES BEING PERPENDICULAR TO ITS DIRECTION ALONG AN ARCUATE PATH TO MAINTAIN SAID SURFACES PARALLEL WITH THE IMMEDIATELY ADJACENT SIDES OF THE PYRAMID PATTERN TO AVOID A PENUMBRA IN THE SELECTED PATTERN.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |