Claims
- 1. A catapult grid drawer comprising:
- an anti-scatter grid; and
- a receptacle for said anti-scatter grid;
- wherein said anti-scatter grid and said receptacle comprise means for mounting said anti-scatter grid in said receptacle only in one predetermined relative orientation.
- 2. The catapult grid drawer as claimed in claim 1, wherein:
- said receptacle comprises at least a first guide and a second guide situated opposite said first guide within said receptacle;
- said anti-scatter grid comprises at least a first edge and a second edge situated opposite said first edge on said anti-scatter grid;
- said first guide and said first edge form a first key and slot interconnection;
- said second guide and said second edge form a second key and slot interconnection; and
- said first key and slot interconnection differs from said second key and slot interconnection in at least one physical characteristic such that said anti-scatter grid is insertable into said receptacle only in the one predetermined relative orientation.
- 3. The catapult grid drawer as claimed in claim 2, wherein said first key and slot interconnection differs from said second key and slot interconnection at least in dimension.
- 4. The catapult grid drawer as claimed in claim 3, wherein said first key and slot interconnection differs from said second key and slot interconnection at least in one of thickness, width or shape.
- 5. The catapult grid drawer as claimed in claim 2, wherein said first key and slot interconnection differs from said second key and slot interconnection at least in distance from a point of symmetry of said anti-scatter grid.
- 6. The catapult grid drawer as claimed in claim 1, wherein:
- said anti-scatter grid comprises a machine-readable coding; and
- said receptacle comprises:
- a reader for reading the coding; and
- a lock controlled by the reader in accordance with the reading of the coding; and wherein:
- the reading of the coding is indicative of the relative orientation of said anti-scatter grid and said receptacle; and
- said lock releases to permit insertion of said anti-scatter grid into said receptacle only if said reader successfully reads the coding.
- 7. The catapult grid drawer as claimed in claim 6, wherein:
- the machine-readable coding comprises at least one cutout non-symmetrically positioned in said anti-scatter grid;
- said reader comprises a light barrier comprising a light transmitter and a light receiver; and
- said light transmitter and light receiver overlap with the cutout when said anti-scatter grid is inserted at least partially into said receptacle in the one predetermined relative orientation.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 34 066.7 |
Aug 1996 |
DEX |
|
Parent Case Info
The following disclosure is based on German Patent Application No. 19634066.7, filed on Aug. 21, 1996, which is incorporated into this application by reference.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2838901 |
Mar 1980 |
DEX |
557121 |
Nov 1943 |
GBX |