|
|
Catadioptric imaging system with dioptric assembly of the petzval type
I claim: 1. A catadioptric imaging system comprising a catoptric assembly and a dioptric assembly, said catoptric assembly comprising a primary mirror for gathering ...
|
|
|
Aspherical glass lens element formed by a low dispersion glass material
What is claimed is: 1. An aspherical lens element which is formed by a glass material and which has an optical axis, a focal length f, a thickness D along said optical ...
|
|
|
Implant for attaching a substitute tooth or the like to a jaw
These and other objects of the invention which shall be hereafter apparent are achieved by an implant provided with a threaded bore for fastening a substitute tooth or ...
|
|
|
Method and apparatus for adjusting die clearance
Accordingly, the present invention is directed to a method and apparatus for automatically adjusting the die clearance which eliminates the problems mentioned above. M...
|
|
|
Projection screen
In view of prior art, it is a general object of the present inventio to provide a projection screen which ahs even reflected light distribution, higher light efficiency, ...
|
|
|
Water freeze prevention valve
It is accordingly an object of this invention to provide a device which furnishes completely dependable protection against freezing and consequent damage to water ...
|
|
|
Bedroom cabinet
It is therefore an object of the present invention to overcome these disadvantages noted above with respect to conventional bedroom cabinets and provide a bedroom ...
|
|
|
Process for decorating the top portion of the ski
Therefore, an object of the present invention is to propose a process for decorating the top portion of a ski, which has the advantages stated above. Also, one of the ...
|
|
|
Connecting device for panels and tubes
The present invention has therefore for principle object to provide a connector for joining tubes and panels in rectangular structures, without requiring any other ...
|
|
|
Workpiece treating barrel
We claim: 1. An abrasive blast-resistant barrel for use in blast treatment of workpieces such as metal castings and the like; said blast-resistant barrel being ...
|