Luminescence exposure apparatus

• US 4,985,631 A
• Filed: 02/13/1989
• Issued: 01/15/1991
• Est. Priority Date: 02/16/1988
• Status: Expired due to Term

• Current Assignee: Difco Laboratories, Inc. (Thermo Fisher Scientific Incorporated)
• Original Assignee: Jerry W. Smith, Jon C. Wannlund
• Inventors: Smith, Jerry W., Wannlund, Jon C.
• Primary Examiner(s): FIELDS, CAROLYN
• Application Number:
  US07/308,718
• Time in Patent Office: 701 Days
• Field of Search: 436/172, 436/175, 250/361 C, 250/483.1, 422/52
• US Class Current: 250/361.00R
• CPC Class Codes: B01L 3/5025 for parallel transport of multiple samples
• CPC Class Codes: B01L 3/50255 Multi-well filtration
• CPC Class Codes: G01N 2021/0325 Cells for testing reactions, e.g. containing reagents
• CPC Class Codes: G01N 2021/0328 Arrangement of two or more cells having different functions for the measurement of reactions
• CPC Class Codes: G01N 2021/0357 Sets of cuvettes
• CPC Class Codes: G01N 2021/1768 using photographic film
• CPC Class Codes: G01N 21/03 Cuvette constructions
• CPC Class Codes: G01N 21/76 Chemiluminescence; Bioluminescence
• CPC Class Codes: G01N 2201/0446 Multicell plate, sequential
• CPC Class Codes: Y10T 436/111666 Utilizing a centrifuge or compartmented rotor
• CPC Class Codes: Y10T 436/25375 Liberation or purification of sample or separation of material from a sample [e.g., filtering, centrifuging, etc.]

Abstract

Apparatus for performing and measuring chemical reactions includes a reaction test apparatus having reaction wells wherein reactants are controllably mixed, and exposure apparatus which receives and positions the reaction test apparatus adjacent a photographic film. Each of the reaction wells includes at least two reaction chambers, arranged in a side by side fashion. All but the final reaction chamber have upwardly sloping sides, so that liquid placed in one reaction chamber can flow to the next reaction chamber when the apparatus is tilted. In a preferred embodiment, the reaction wells are supported in a plate that is structurally integral with the wells but separates the wells from each other. The test plate is retained in the exposure apparatus, and liquid is controllably flowed from one reaction chamber to the next by tilting the exposure apparatus. The apparatus of the invention is particularly suited for measuring reactions that produce luminescence of short duration, as the reactants can be conveniently mixed in darkness, while the film is being exposed.

Claims

1. Luminescence exposure apparatus for conducting luminescence reaction tests on specimens contained within a test well in a reaction test apparatus, comprising:

a lower housing having

a flat, upwardly facing internal surface comprising means for receiving a piece of film thereupon.

a mask covering the upwardly facing surface and having an opening therethrough positioned to correspond to the location of the test well in the reaction test apparatus,

biasing means on the mask for resisting the downward movement of the reaction test apparatus, when the reaction test apparatus is placed upon the mask, and

a movable shutter between the upwardly facing internal surface and the mask; and

an upper housing including

translation means for controllably urging the reaction test apparatus downwardly against the resistance of the biasing means, thereby contacting the bottom of the reaction well in the reaction test apparatus with the piece of film in the lower housing.

2. The exposure apparatus of claim 1, further including an extension on one end of the exposure apparatus, the extension having an inclined surface on the bottom thereof comprising means to limit the angular rotation of the exposure apparatus to a predetermined amount when the exposure apparatus is placed onto a flat surface and rotated toward the inclined surface.

3. The exposure apparatus of claim 1, wherein the reaction test apparatus includes a plurality of reaction wells, and the mask has openings therethrough for each of the reaction wells.

4. The exposure apparatus of claim 1, further including

locking means for preventing improper operation of the exposure apparatus, the locking means including a movable shutter lock, the movable shutter lock preventing the opening of the movable shutter when the reaction test apparatus is not in contact with the film in the lower housing.

5. The exposure apparatus of claim 1, wherein the upper housing is joined to the lower housing with a hinge.

6. The exposure apparatus of claim 1, wherein the means for receiving a piece of film includes an instant developing film pack.

7. The exposure apparatus of claim 1, wherein the translation means includes a cam lobe that contacts and controllably urges the reaction test apparatus downwardly.

8. The exposure apparatus of claim 7, wherein the cam lobe is supported on a rod, which is rotated by a translation control lever external of the upper housing.

9. The exposure apparatus of claim 1, further including

interlock means for preventing the inadvertent exposure of the film.

10. The exposure apparatus of claim 9, wherein the interlock means includes means for preventing the upper housing from being opened when the movable shutter is in a position to expose the film.

11. Luminescence exposure apparatus for conducting luminescence reaction tests on specimens contained within a test well in a reaction test apparatus, comprising:

a lower housing having

a flat, upwardly facing internal surface comprising means for receiving a piece of film thereupon,

a mask covering the upwardly facing surface and having an opening therethrough positioned to correspond to the location of the test well in the reaction test apparatus,

a biasing spring between the internal surface and the reaction test apparatus to resist the downward movement of the reaction test apparatus, when the reaction test apparatus is placed into the lower housing, and

movable shutter means for controllably permitting light emitted from the test well to strike the film;

an upper housing including

translation means for controllably urging the reaction test apparatus downwardly against the resistance of the biasing spring, thereby contacting the bottom of the reaction well in the reaction test apparatus with the piece of film in the lower housing; and

an extension on one end of the lower housing, the extension having an inclined surface on the bottom thereof comprising means to limit the angular rotation of the lower housing to a predetermined amount when the lower housing is placed onto a flat surface and rotated toward the inclined surface.

12. Luminescence exposure apparatus for conducting luminescence reaction tests on specimens contained within a test well in a reaction test apparatus, comprising:

housing means for containing a test well in which light is produced by a luminescence reaction and means for recording the light, the housing means including a housing that receives the reaction test apparatus and a piece of photographic film therein; and

an extension on one end of the housing, the extension comprising means for limiting the angular rotation of the housing to a predetermined amount when the housing is placed onto a flat surface and rotated.

13. The exposure apparatus of claim 12, wherein the housing means comprises:

a lower housing having

a flat, upwardly facing internal surface comprising means for receiving a piece of film thereupon,

a mask covering the upwardly facing surface and having an opening therethrough positioned to correspond to the location of the test well in the reaction test apparatus,

a biasing spring between the internal surface and the reaction test apparatus to resist the downward movement of the reaction test apparatus, when the reaction test apparatus is placed into the lower housing, and

movable shutter means for controllably permitting light emitted from the test well to strike the film, and

an upper housing including

translation means for controllably urging the reaction test apparatus downwardly against the resistance of the biasing spring, thereby contacting the bottom of the reaction well in the reaction test apparatus with the piece of film in the lower housing.