Optical: systems and elements – Mirror – With support
Reexamination Certificate
2003-07-10
2004-11-09
Cherry, Euncha P. (Department: 2872)
Optical: systems and elements
Mirror
With support
Reexamination Certificate
active
06814455
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a mirror diagonal that has reduced weight and accordingly lower manufacturing cost. The present invention also relates to a method of manufacturing the weight-reduced mirror diagonal.
BACKGROUND OF THE INVENTION
FIGS. 1 and 2
are assembled and exploded perspective views, respectively, of a conventional mirror diagonal
10
. As shown, the conventional mirror diagonal
10
mainly includes a body
11
, a seat
12
, a first tube
13
, a second tube
14
, and a reflection mirror
15
. The body
11
is provided with a first and a second internally threaded hole
111
,
112
. The seat
12
is provided at predetermined positions with a plurality of mounting holes
121
, so that the seat
12
is connected to a bottom of the body
11
by threading screws
122
through the mounting holes
121
into the body
11
. The reflection mirror
15
is adhered to a top of the seat
12
.
FIGS. 7 and 8
are top and sectioned side views, respectively, of the conventional mirror diagonal
10
.
Please refer to
FIGS. 7 and 8
. The first tube
13
is screwed into the first threaded hole
111
provided on the body
11
, and the second tube
14
into the second threaded hole
112
.
FIG. 5
shows the manner of manufacturing the body
11
for the conventional mirror diagonal
10
. The body
11
is made by cutting a long bar of solid aluminum material
30
into a plurality of small sections
31
, which are individually processed in predetermined manners to form a plurality of aluminum prisms
32
having two slant faces. The aluminum prisms
32
are then properly processed, including drilling and tapping on the two slant faces.
Researches in astronomical field have been quickly developed since Rene Descartes invented the coordinate geometry. Today, amateur astronomical observers and the general public have played important roles in astronomical observation, and different grades of mirror diagonals are easily available in the market. However, from careful studies of the components forming the existing mirror diagonals, one would surprisingly find too much material is unnecessarily used to produce the mirror diagonals.
It is therefore tried by the inventor to develop a mirror diagonal that is manufactured with less material and therefore has reduced overall weight and manufacturing cost.
SUMMARY OF THE INVENTION
In one aspect of the present invention, there is provided a mirror diagonal having reduced overall weight and accordingly reduced manufacturing cost.
In another aspect of the present invention, there is provided a method of manufacturing mirror diagonal to reduce an overall weight and manufacturing cost thereof.
The method of the present invention for manufacturing a weight-reduced mirror diagonal mainly includes the steps of: (a) preparing an extruded aluminum tube having a predetermined cross-sectional shape to provide a bottom and two slant faces; (b) cutting the extruded aluminum tube to provide a plurality of short sections having a desired length and two open lateral sides, so that each short section forms a housing for the mirror diagonal; (c) processing each housing in predetermined manners; (d) adhering a reflection mirror to the bottom in each housing; (f) sealing the two open lateral sides with two-sealing covers; and (g) mounting a first and a second tube in two tube mounting holes formed on the two slant faces of each housing.
REFERENCES:
patent: 3676938 (1972-07-01), Trehub
Cherry Euncha P.
Rabin & Berdo P.C.
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