 Magnetic head and method of producing same |
| Accordingly this invention has been developed for the purpose of obviating the aforesaid ... |
|
| Amorphous alloys containing iron group elements and zirconium and articles made of said alloys |
| We claim: 1. Amorphous alloys containing iron group elements and zirconium and having the ... |
|
| Amorphous alloys |
| We claim: 1. Amorphous metal alloys having a composition shown by the following formula T.sub.a X.... |
|
| Transferable paint film and method for its manufacture |
| What is claimed is: 1. A transferable paint film consisting essentially of a carrier film, a ... |
|
| Amorphous metallic and nitrogen containing alloy films |
| In accordance with this invention, an amorphous metallic film is composed of an alloy of nitrogen ... |
|
| Magnetic recording medium |
| We claim: 1. A magnetic recording medium comprising a nonmagnetic base, a metal discontinuous layer ... |
|
| Closed loop reactant/product management system for electrochemical galvanic energy devices |
| OF THE INVENTION The present invention, generally, and the systems shown in the figures of the ... |
|
| Paper composed mainly of pullulan fibers and method for producing the same |
| What is claimed is: 1. A paper composed of pullulan fibers, or a mixture of 90 to 20% of pullulan ... |
|
| Use of methylenebis- and thiobisnaphthols as promoters in tire cord adhesion to rubber |
| We claim: 1. In a vulcanizable rubber composition comprising rubber, a filler material and an N-(... |
|
| Vehicle mounting for a portable microwave antenna dish |
| The present invention is directed to an improved dish antenna mounting arrangement which is mounted ... |
|
|
Fireproof covering
| Details |
Inventors: Eiermann, Horst W.;
Assignee: PCT Pyrochemtek AG (CH); Rockwool AB (SE); Chemische Fabrik Grunau GmbH (DE)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
A fireproof covering for protecting heat-sensitive material and structures, said covering comprising: pre-shaped mineral wool components, molded to rigid, substantially self-supporting forms with a binder, for surrounding the heat-sensitive material and structures; and, a fireproof coating at least on the outside of the rigid mineral wool components, the coating progressively sintering onto the surface of the rigid mineral wool components under fire conditions and supporting the components as the binder progressively decomposes, whereby heat-sensitive material and structures can be protected from fire conditions for extended periods of time. |
|
DETAILED DESCRIPTION The object of this invention is to provide a fireproof covering, which is less expensive to manufacture and easier to fit and install, but which nevertheless protects against fire, weathering, chemical attach and mechanical impact.
According to the invention, this object is achieved by a fireproof covering comprising rigid mineral wool components with a fireproof coating, at least on the outside.
Suitable mineral wool has a high softening point.
Suitable examples include rock wool made from a basalt/dolomite melt or a basalt/limestone melt as well as slag wool and/or ceramic wool.
The fireproof coating can advantageously be formed from an inflammable or not readily flammable fireproofing agent, which is highly resistant to weathering, chemical damage and degradation and mechanical impact.
A suitable fireproof coating is disclosed in German Pat.
No.
2,039,969, corresponding to U.
S.
Pat.
No.
3,642,531, the teachings of which are incorporated herein by reference.
A fireproof covering according to this invention can be adapted to the conditions prevailing on-site, because it comprises self-supporting components requiring no separate supporting framework.
Although the necessary protection is not provided by either mineral wool alone or by a fireproof coating alone, quite surprisingly, it has been found that there is a special interaction between the two components which leads to the protection necessary against high temperatures, even if the mineral wool and/or fireproof coating contains a certain percentage of organic binders, which decompose in a fire.
As the temperature rise in the case of a fire is a dynamic process, it is not absolutely necessary for the covering to withstand the highest temperatures, which can be in the range of 1,000.
degree.
C.
It is in fact a question of delaying the heat penetration to such an extent that for the necessary time, the electrical cables or other structure disposed inside of the covering remain operative.
In the case of a fire, the mineral wool is protected by the fireproof coating
|
| Related patents |
|
|
Skin-shaped product of aminoplast resin mixture and fibrous material
We claim: 1. Skin-shaped product comprising an aminoplast resin mixture which is the reaction product of an amino compound with formaldehyde and further including ...
|
|
|
Cutting and hemming system
Referring now in more detail to the drawing, in which like numerals indicate like parts throughout the several views, FIG. 1 illustrates the cutting and hemming system 1...
|
|
|
Material-web marking by means of bar code
With the foregoing in mind, it is a primary object of the present invention to provide a new and improved method of, and arrangement for, applying codes to an object and ...
|
|
|
Multi-pole circuit breaker
We claim: 1. The combination of a plurality of circuit breaker units, each unit having its own case containing; a pair of relatively movable contacts, an automatically ...
|
|
|
Cuspated sheet forming
What is claimed is: 1. A forming process of manufacturing an unperforated cuspated sheet comprising deforming a sheet of melt spinnable thermoplastic material by ...
|
|
|
Method for making metallic glass powder
In accordance with the invention, a method for making metallic glass powder comprises the steps of forming a jet of molten, glass forming metal alloy and impinging the ...
|
|
|
Metallic glass powders from glassy alloys
OF THE INVENTION Metallic glass alloy powders are prepared according to a process involving first annealing a glassy alloy to an embrittled state and then comminuting ...
|
|
|
Embrittling of glass alloys by hydrogen charging
OF THE INVENTION Metallic glass alloy powders are prepared according to a process involving first exposing a glassy alloy to hydrogen to produce an embrittled state and ...
|
|
|
Process for the production of titanium-based alloy members by powder metallurgy
What is claimed is: 1. A process for the production of titanium based alloy members, comprising: (a) preparing a metal powder selected from the group consisting of ...
|
|
|
Amorphous alloys for magnetic head core and video magnetic head using same
Accordingly the invention has as its general object the provision of amorphous alloys for producing magnetic head cores and a magnetic head of high performance using ...
|
|
|
Radio 
