1. An acoustical door comprising:
an inner core assembly including
a spacer frame having a first set of spacer strips extending along a first direction and a second set of spacer strips extending along a second direction,
a first core layer positioned within the spacer frame, and
a second core layer positioned within the spacer frame, the second core layer constructed of a material dissimilar from the first core layer;
a multi-layer skin spaced apart from the inner core assembly, the multi-layer skin including a sheet constructed of lead; and
a spacer coupling the multi-layer skin and the inner core assembly around a mutual periphery, an air space being defined within the mutual periphery and between the multi-layer skin and the inner core assembly such that the multi-layer skin is configured to flex independent of the inner core assembly.
2. The acoustical door of claim 1, wherein the inner core assembly further includes a crossband layer adhesively bonded to the spacer frame.
3. The acoustical door of claim 1, wherein the first core layer overlaps the second core layer, the first core layer and the second core layer are not bonded.
4. The acoustical door of claim 1, wherein the first core layer has a first thickness, the second core layer has a second thickness, and the first thickness is substantially the same as the second thickness.
5. The acoustical door of claim 1, wherein the first core layer is constructed of low density fiberboard material.
6. The acoustical door of claim 1, wherein the second core layer is constructed of mineral wool.
7. The acoustical door of claim 1, wherein the second core layer is provided by a plurality of separate panels positioned within the spacer frame.
8. The acoustical door of claim 1, further comprising a blocking section positioned adjacent the inner core assembly between the multi-layer skin and an additional multi-layer skin provided on an opposing side of the inner core assembly, the blocking section including two layers of dissimilar thickness.
9. The acoustical door of claim 8, wherein the blocking section further includes double-sided tape positioned between the two layers of the blocking section to bond the two layers and define an air space there between.
10. The acoustical door of claim 8, wherein the two dissimilar layers of the blocking section are constructed of high-density fiberboard.
11. The acoustical door of claim 1, further comprising a frame including generally horizontal rails and generally vertical stiles, the frame surrounding a perimeter of the inner core assembly.
12. The acoustical door of claim 1, wherein the multi-layer skin includes an inner layer and an outer aesthetic layer, the lead sheet positioned between the inner layer and outer aesthetic layer.
13. The acoustical door of claim 1, wherein the spacer is constructed of high density fiberboard.
14. The acoustical door of claim 1, further comprising a vinyl layer positioned adjacent the air space and within the mutual periphery, the spacer has a first thickness, the vinyl layer has a second thickness and the first thickness is greater than the second thickness.
15. The acoustical door of claim 14, wherein the vinyl layer is unbound from the inner core assembly, and a majority of the surface area of the vinyl layer is unbound from the multi-layer skin.
16. The acoustical door of claim 1, further comprising a second multi-layer skin including a lead sheet, the second multi-layer skin spaced apart from the inner core assembly with a second spacer coupling the second multi-layer skin to the inner core assembly around a second mutual periphery, a second air space being defined within the second mutual periphery and between the second multi-layer skin and the inner core assembly such that the second multi-layer skin is configured to flex independent of the inner core assembly.
17. The acoustical door of claim 1, wherein the first direction of the first set of spacer strips is perpendicular to the second direction of the second set of spacer strips.
18. An acoustical door comprising:
an inner core assembly including
a spacer frame having a first set of spacer strips extending along a first direction and a second set of spacer strips extending along a second direction, the first set of spacer strips are bonded to the second set of spacer strips at locations of overlap,
a first core layer positioned within the first set of spacer strips, and
a second core layer provided by a plurality of separate panels positioned within the second set of spacer strips, the second core layer constructed of a material dissimilar from the first core layer; and
a skin coupled to the inner core assembly.
19. The acoustical door of claim 18, further comprising a spacer coupling the skin to the inner core assembly around a mutual periphery, an air space being defined within the mutual periphery and between the skin and the inner core assembly such that the skin is configured to flex independent of the inner core assembly.
20. The acoustical door of claim 18, wherein the skin is a multi-layer skin including a lead sheet, an inner layer, and an outer aesthetic layer, the lead sheet positioned between the inner layer and outer aesthetic layer.
21. The acoustical door of claim 18, wherein the inner core assembly further includes first and second crossband layers, respectively bonded to opposing sides of the spacer frame.
22. The acoustical door of claim 18, wherein the first core layer overlaps the second core layer, and the first core layer and the second core layer are not bonded together.
23. The acoustical door of claim 18, wherein the first core layer has a first thickness, the second core layer has a second thickness, and the first thickness is substantially the same as the second thickness.
24. The acoustical door of claim 18, wherein the first core layer is constructed of low density fiberboard material.
25. The acoustical door of claim 18, wherein the second core layer is constructed of mineral wool.
26. The acoustical door of claim 18, further comprising a blocking section positioned adjacent the inner core assembly between the skin and an additional skin provided on an opposing side of the inner core assembly, the blocking section including two layers of dissimilar thickness.
27. The acoustical door of claim 18, further comprising a frame including generally horizontal rails and generally vertical stiles, the frame surrounding a perimeter of the inner core assembly.
28. The acoustical door of claim 19, further comprising a vinyl layer positioned adjacent the air space and within the mutual periphery, the spacer has a first thickness, the vinyl layer has a second thickness and the first thickness is greater than the second thickness.
29. The acoustical door of claim 19, further comprising a second skin, the second skin coupled to the inner core assembly with a second spacer around a second mutual periphery, a second air space being defined within the second mutual periphery and between the second skin and the inner core assembly such that the second skin is configured to flex independent of the inner core assembly.
30. The acoustical door of claim 18, wherein the first direction of the first set of spacer strips is perpendicular to the second direction of the second set of spacer strips.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A high temperature camera apparatus including a video camera for viewing the interior of a high temperature chamber through an opening in a wall of the chamber, the apparatus comprising:
(a) an elongated camera housing tube, including an interior passageway, for extending through the opening and having an exterior end for mounting relatively nearer the exterior of the chamber wall and an interior end for mounting near the interior of the chamber wall;
(b) an elongated camera support member having the camera mounted near an interior end of the support member and extending to the exterior end, the support member supporting the camera at the interior end of the camera housing tube;
(c) a ceramic heat shield tube telescopically surrounding and spaced from at least a portion of the camera; and
(d) an air inlet manifold including an air inlet in fluid communication with the interior passageway of the camera housing tube for transporting cooling fluid along the interior passageway and cooling the camera.
2. An apparatus in accordance with claim 1 wherein the ceramic heat shield tube telescopically surrounds and is spaced outwardly from the camera housing tube and extends from the interior end of the camera housing tube toward the exterior end of the camera housing tube at least a distance so it surrounds the entire video camera
3. An apparatus in accordance with claim 2 wherein the camera housing tube has an exterior reflective surface.
4. An apparatus in accordance with claim 3 wherein the camera housing tube is a steel tube which is plated and polished to form the reflective surface.
5. An apparatus in accordance with claim 2 or claim 3 or claim 4 wherein a plurality of spacers project outwardly from the exterior surface of the camera housing tube to space the heat shield tube from the camera housing tube.
6. An apparatus in accordance with claim 5 wherein an outer, steel, tubular sleeve telescopically surrounds the ceramic heat shield tube.
7. An apparatus in accordance with claim 5 and further comprising a steel end plate mounted at the interior end of the camera housing tube, the steel end plate having an image hole aligned with an image axis of the camera and a plurality of spaced ventilation holes surrounding the image hole.
8. An apparatus in accordance with claim 7 wherein the ceramic heat shield tube has an inturned interior end and a ceramic end plate is seated against the interior of the inturned end of the ceramic heat shield tube and has a port concentric with the image hole of the steel end plate.
9. An apparatus in accordance with claim 7 and further comprising a plurality of spacers projecting from the interior end of the steel end plate and seating against the ceramic end plate.
10. An apparatus in accordance with claim 9 wherein the spacers are outwardly tapered to minimize contact with the ceramic end plate and ceramic heat shield tube.
11. An apparatus in accordance with claim 5 wherein the ceramic heat shield tube has an inturned interior end and a spring is connected to an exterior end of the ceramic heat shield tube for spring biasing the interior end of the ceramic heat shield tube against the interior end of the camera housing tube.
12. An apparatus in accordance with claim 11 wherein an outer, carbon steel, tubular sleeve telescopically surrounds the ceramic heat shield tube.
13. An apparatus in accordance with claim 12 and further comprising a steel end plate mounted at the interior end of the camera housing tube, the steel end plate having an image hole aligned with an image axis of the camera and a plurality of spaced ventilation holes surrounding the image hole.
14. An apparatus in accordance with claim 13 wherein the ventilation holes are inclined inwardly from the interior passageway of the camera housing tube.
15. An apparatus in accordance with claim 14 and further comprising a ceramic end plate seated against the interior of the inturned end of the ceramic heat shield tube and having a port concentric with the image hole of the steel end plate.
16. An apparatus in accordance with claim 15 and further comprising a plurality of spacers projecting from the interior end of the steel end plate and seating against the ceramic end plate.
17. An apparatus in accordance with claim 16 wherein the spacers are outwardly tapered to minimize contact with the ceramic end plate and ceramic heat shield tube.
18. An apparatus in accordance with claim 5 and further comprising a pair of liquid coolant jacket tubes sealingly engaging the camera housing tube, one coolant jacket tube radially outwardly and one coolant jacket tube radially inwardly of the camera housing tube to form a liquid coolant jacket chamber on each radial side of the camera housing tube, and a coolant inlet conduit is connected with a first one of the coolant jacket chambers and a coolant outlet conduit is connected with a second one of the coolant jacket chambers, and wherein a plurality of ports are formed through the camera housing tube to provide liquid coolant communication between the coolant jacket chambers.
19. An apparatus in accordance with claim 1 and further comprising a pair of liquid coolant jacket tubes sealingly engaging the camera housing tube, one coolant jacket tube radially outwardly and one coolant jacket tube radially inwardly of the camera housing tube to form a liquid coolant jacket chamber on each radial side of the camera housing tube, and a coolant inlet conduit is connected with a first one of the coolant jacket tubes and a coolant outlet conduit is connected with a second one of the coolant jacket tubes, and wherein a plurality of ports are formed through the camera housing tube to provide liquid coolant communication between the coolant jacket chambers.
20. An apparatus in accordance with claim 1 and further comprising an end plate mounted to the interior end of the camera housing tube and wherein the ceramic heat shield tube is mounted to the end plate.
21. An apparatus in accordance with claim 20 wherein a tubular shroud is also mounted to the end plate radially inwardly of the ceramic heat shield.