CRT shield

An adjustable shield is provided which fits over the cabinet of a CRT to help eliminate glare on the screen and also serves as a security shield. The shield is made in three telescoping pieces so that a standard shield can be adjusted to fit a number of different sizes.

SUMMARY OF THE INVENTION 
CRT readouts are very common in many applications such as word processors, 
T.V., computers, oscilloscopes, monitors or the like. Such CRTs are 
ordinarily enclosed in a cabinet so that the face of the tube is not 
protected from ambient light as from overhead light fixtures or windows at 
the side. This glare is highly undesirable and is tiring on the operator. 
The present invention provides a shield which extends along the top and 
sides of the CRT. This serves to not only reduce glare but also serves as 
security shield since in many applications confidential code numbers may 
appear on the screen and it is not desired that bystanders be able to read 
the numbers. 
The shield of the present invention is made in three telescoping sections 
so that it will fit a wide variety of CRT applications. Thus, the device 
of the present invention can be used with the smallest to the largest 
cabinets. 
Since the CRT shield of the present invention is made of three separate 
pieces, it can be stored and shipped in a minimum of space. 
Other features and advantages of the invention will appear in the balance 
of the specification.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring now to the drawings by reference characters, there is shown a 
terminal generally designated 5. The terminal has a CRT 7 and is housed in 
a cabinet having a top 9 and ends 11 and 13. The shield proper is made in 
three pieces, namely, a center section 15, an end section 17 and a second 
end section 19. The center section 15 has a center flat portion 21 and in 
general this section should be slightly less in width than the smallest 
cabinet on which the shield is to be used. The front and rear edges are 
rolled over as at 23 and 25 so that the section of the edge forms a U with 
gaps 27 and 28 formed between the bottom of the flat central section and 
the turned over edges. The end 17 has a horizontal portion 29 and a 
downwardly extending end portion 31, preferably joined by a hinge, such as 
a living hinge 32. The hinge facilitates installation on a cabinet having 
sloping sides and also allows the end to be folded flat for shipping and 
storage. The lower front edge portion 33 is preferably cut off at an 
angle. The opposite end portion 19 is a mirror image and therefore not 
described in detail. The thickness of the horizontal portion 29 is such 
that it just forms a snug fit in gaps 27 and 28 at the front and back of 
the shield. The shield is telescoped together and placed over the cabinet 
and pushed in so that the vertical portions of the ends are flush with the 
two sides of the cabinet. The front edge of the thus assembled structure 
is normally pulled forward so it will extend outwardly over the face of 
the CRT, protecting it from ambient light as well as giving a certain 
measure of security. 
It is ordinarily not necessary to fasten the parts together or to fasten 
them to the cabinet of the CRT. However, if it is desired to provide 
fasteners, this can take the form of the pressure sensitive tapes 34, 35 
and 37. Preferably this is of the dual locking peel and press type which 
allows for easy placement and removal for servicing. 
Preferably the shield of the present invention is made of a tough inert 
plastic which can be opaque, preferably either in black or dark green or 
it might be made of a smoky gray transparent plastic. 
Various variations can be made from the exact structure shown without 
departing from the spirit of this invention.