Ventilation – Having both inlet and outlet airways
Reexamination Certificate
2002-12-18
2003-12-30
Lu, Jiping (Department: 3749)
Ventilation
Having both inlet and outlet airways
C454S252000
Reexamination Certificate
active
06669553
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of isolation chambers, and in particular, relates to chambers which are isolated from sound or other electronic or electronic “bug”-type surveillance.
BACKGROUND OF THE INVENTION
The prior art in this area describes a variety of different types of sound proof chambers. The conventional approach in the construction of sound proof chambers is to combine materials possessing acoustic damping properties (to be used as finishes) with thick materials which offer high resistance to vibration. These damping materials can also be incorporated within the cavity walls of conventional enclosures. The resultant devices provide some sound reduction, but additional sound proofing can be desired.
The use of vacuum conditions in the walls of a structure has been described, for example in a railcar, as described in U.S. Pat. No. 4,935,599, issued Jun. 19, 1990 to Babin et al. in which the walls of the railcar are kept under a partial vacuum. However, this vacuum is established more for the flow of air from the chamber, rather than for its sound proofing ability. Further, the railcar is a large structure which is not suitable for setting up or movement within, for example, the various rooms of a house or business location.
Further, technology is known for detecting electronic bugs or electronic surveillance. Whidden, for example, in U.S. Pat. No. 4,368,539 provides a frequency scanning means for detecting eavesdropping. However, no reference is made to the use of this technology in an isolation chamber-type application.
As such, it would also be desirable to provide such a chamber which has a modular construction allowing the chamber to be easily set up in a variety of configurations, sizes and locations. Accordingly, such a chamber would provide an improvement over chambers relying on the acoustic insulation approach, or the railcar system of Babin et al.
Definitions
In the following specification, the terms used are to be accorded the definitions as set out hereinbelow.
The invention is basically manufactured to perform at least one of two separate functions and will be differentiate by their model numbers “Mark I” & “Mark II” respectively. The significant difference between both models is that Mark II is an enhancement of Mark I.
In particular, in the preferred embodiments, the THINK TANK Mark I, is a structurally designed manufactured and assembled Sound Proof Chamber. The THINK TANK Mark II is a structurally designed manufactured and assembled Sound Proof Chamber as well as an Electronic Surveillance Bug Proof Chamber.
It should be noted, however, that unless stated otherwise the invention for which letters patent is being applied for is referred to throughout this application package as “Chamber”, “Enclosure” or “THINK TANK” is deemed to mean those characteristics referring to THINK TANK Mark I.
“Embodiment” is deemed to mean either THINK TANK Mark I or THINK TANK Mark II or any part or parts thereof depending upon the respective context in which the said word is used.
“MODULE” refers to any single entity which must be collectively assembled in numbers so as to form a single wall floor or roof component side.
“A COMPONENT SIDE” means any one complete side of the present embodiment, such as, for example, the roof in it's entirety might be a component side. Additionally, any one of the three walls comprising one leg each of both corner wall modules and a required number of intermediate modules relative to the overall size of the enclosure. This constitutes one complete component side. Further, the door opening component unit with the door module including one leg each of both corner wall modules a required number of intermediate modules relative to the overall size of the enclosure. This constitutes the door component side. Yet further, a component side might be the floor in it's entirety.
“A COMPONENT MEMBER” means the required number of intermediate modules joined together along their longitudinal sides, including for example, with respect to the roof component side, less both roof end modules, with respect to the wall component sides, less one leg each of both corner wall modules, and with respect to the floor component side, less both floor end modules.
“A COMPONENT UNIT” means a single member unit integrally formed and molded to a size which is equal to that of it's component member counterpart. This applies for any of the roof, wall or floor component members.
“Internal and External” whenever used in context with “Sheet Decking” always refers to the interior and exterior locations respectively of the sound proof chamber.
The depth of the cavity, being the space between an inner and outer wall of the component sides, of all modules and component units can vary depending on the desired design structure, but is preferably between 50 mm and 300 mm, more preferably between 100 mm and 200 mm, and most preferably is about 150 mm (approximately 6″).
Because of the modular nature of the components of the device of the present invention, it will be possible to form a combination of intermediate module and component units together with corner wall modules within the assembly of one and the same enclosure, and thus form complete component sides of various sizes, in accordance with the component sizing schedule.
Modules may be formed and molded in multiple sizes, preferably to a maximum width of that of one component unit.
The modules can be fabricated from any suitable material, but preferably are made from plastic. These plastic modules may be formed and molded in multiple sizes of incremental widths to a maximum width of that of one component unit for roof, wall or floor component sides.
It is to be noted, however, that all measurements and other design selection features are described without their actual quantity being necessarily specified. The components and materials used are also subjected to working stresses and hence must be suitably structurally designed prior to manufacture.
Each and every entity within this documentation that is provided for the said purpose of providing structural strength and rigidity to the said sound proof enclosure must be chemically and structurally designed and calculated in order to, for example, derive the correct polymerization of compounds of the plastic materials. Structural designs must also be effected so as to obtain the correct sizing and quantifying and some configuration changes to various entities might be required in order to obtain optimum structural stability within the said enclosure. Further, allowance should be made to accommodate additional entities, such as plastic entities, with respect to both their shape and size, solely for the purpose of ensuring adequate structural stability. Among such entities are deemed to be any or all of the following, namely: all stiffener ribs; roof bearing ribs; under wall support ribs; buttresses; stiffener flanges; lateral stabilizing ribs; or, structural stiffener braces.
DESCRIPTION OF THE INVENTION
The principal object of the present invention relates primarily to the provision of a Sound Proof Chamber. A further object to the present invention is to provide an Electronic Surveillance Bug Proof Chamber; the latter object being an enhancement of the former embodiment.
The aforesaid is conceived on the principle that the propagation of audible sound is nonexistent within a vacuum environment. By creating an enclosure with both the inner and outer surfaces of all it's boundaries so sealed, a continuous cavity is formed within it's component sides. By applying a significantly high vacuum pressure of specified value within it's cavity, the transmission of audible sounds from either side of said enclosure will be restricted. Preferably, the vacuum applied to the cavity will be such that the air pressure within the cavity is maintained at a level of less 90%, and more preferably less than 50% of standard atmospheric pressure. Yet more preferably the air pressure is less than 25%, and still more preferably, less
(Marks & Clerk)
Lu Jiping
LandOfFree
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