U.S. patent number 3,803,831 [Application Number 05/392,838] was granted by the patent office on 1974-04-16 for visual indication apparatus with rotatable transparent discs.
This patent grant is currently assigned to Motorola, Inc.. Invention is credited to Joseph Horzick.
United States Patent |
3,803,831 |
Horzick |
April 16, 1974 |
VISUAL INDICATION APPARATUS WITH ROTATABLE TRANSPARENT DISCS
Abstract
A novel rotary indicator apparatus which is particularly
suitable for timepieces but which is adaptable for any application
where derived information is to be visually displayed. For
time-pieces two or more graduated discs are utilized in co-centric
relation to one another. At least one of such discs is caused to
rotate with respect to the other by having the respective discs
exhibit a progressively decreasing color intensity but in opposite
directions, a unique visual effect or traveling zone is evidenced
to the viewer's eye as the discs rotate one on top of the
other.
Inventors: |
Horzick; Joseph (West Chicago,
IL) |
Assignee: |
Motorola, Inc. (Chicago,
IL)
|
Family
ID: |
23552203 |
Appl.
No.: |
05/392,838 |
Filed: |
August 29, 1973 |
Current U.S.
Class: |
368/233; 968/382;
116/335; 968/162 |
Current CPC
Class: |
G04B
19/20 (20130101); G04B 45/0007 (20130101) |
Current International
Class: |
G04B
19/00 (20060101); G04B 19/20 (20060101); G04B
45/00 (20060101); G04b 019/00 () |
Field of
Search: |
;58/126R,126A,126D,126E,127,128 ;116/115 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Miller, Jr.; George H.
Attorney, Agent or Firm: Rauner; Vincent J. Southard; Donald
B.
Claims
What is claimed is:
1. In a timepiece of the type having concentric hollow shafts for
referencing seconds, minutes and hours, improved rotary indicator
apparatus including in combination:
a dial face comprising a plurality of concentric circular bands
each having a graduated color intensity and which progressively
decreases from substantially full color in a given rotary
direction; and
a plurality of transparent discs arranged on said concentric hollow
shafts in substantial coaxial alignment with each other and to said
dial face;
each of said plurality of transparent discs having a corresponding
circular band overlaying a respective one of said dial face
circular bands, and which includes the same said graduated color
intensity but progressively decreasing in a rotary direction
opposite to said first named direction,
each said transparent disc creating a traveling zone effect as it
rotates in relation to an associated one of said dial face circular
bands.
2. Rotary indicator apparatus for a timepiece in accordance with
claim 1 wherein said transparent discs are formed of a cellulose
acetate material with a thickness in the range of 0.007 inches.
3. Rotary indicator apparatus in acordance with claim 1 wherein the
graduated color intensity of said plurality of transparent discs
varies between substantially full color intensity and approximately
five percent thereof.
4. Rotary indicator apparatus for a timepiece in accordance with
claim 1 wherein there are at least three transparent discs of
differing colors and of progressively smaller diameters to
represent, respectively, hours, minutes and seconds.
5. Rotary indicator apparatus for a timepiece in accordance with
claim 4 wherein said transparent discs of graduated but differing
colors includes a full color intensity level in the range of 120
lines per inch when applied by a lithographic printing process.
Description
BACKGROUND
1. Field of Invention
The present invention relates in general to visual indicators and,
more particularly to improved visual indicator apparatus having two
or more rotatable color-graduated discs for effecting a unique
visual effect, which apparatus is suitable for incorporation in
horological devices, gauges, controls or other applications where
derived information is to be visually displayed.
Without imposing a limitation as to any other potential
applications, the present invention is set forth and disclosed in
the environment of timepieces.
The conventional method of displaying information, particularly for
clocks or timepieces generally, is by moving radial arms or hands
about a circular dial face. The watch hands are more often than not
quite fragile, particularly the second hand. Additionally, it takes
a discernable amount of time to correlate the respective positions
of the plurality clock or watch hands for the conventional
timepiece so as to correctly determine the particular time.
SUMMARY
An object of the present invention is to provide an improved rotary
indicator apparatus which exhibits a novel visual effect.
A more particular object of the present invention is to provide
improved visual indicator apparatus for a timepiece which provides
an immediate and accurate indication of time at a glance.
Another object of the present invention is to provide an improved
visual indicator apparatus of the foregoing type for timepieces in
which conventional radial or clock hands are not required.
In a preferred embodiment, as applied to timepieces, a plurality of
graduated plastic discs are arranged one on top of another on the
clock or dial face. The discs are made of any suitably transparent
material with the portions that are visible being graduated in
color from full or 100 percent intensity down to some nominal
value, say in the 5 percent range. One disc is made stationary with
the remaining disc or discs being selectively rotated in the same
manner and by the same rotary shafts of the associated timepiece as
used for the conventional radial arms or clock hands.
Accordingly, as one disc rotates in relation to another, a
continually expanding zone of either darker or lighter color tone
is presented to the eye which provides an immediate and accurate
indication of time at a glance, while at the same time effects an
attractive and pleasing visual effect to the viewer. Separate
rotatable discs may be employed for minute and hour references in
addition to indicating seconds. Alternatively, it may be desirable
or otherwise preferable to merely indicate seconds and utilize
other means for referencing minutes and hours. Further, markers of
one sort or another may be utilized on the minute and hour discs,
if used, to provide a more conventional time references in addition
to the traveling zone effect. In this instance, however,
conventional radial arms or hands are nevertheless still not
required.
BRIEF DESCRIPTION OF THE DRAWINGS
The features of the present invention which are believed to be
novel are set forth with particularity in the appended claims. The
invention, itself, however, together with further objects and
advantages thereof, may best be understood by reference to the
following description when taken in conjunction with the
accompanying drawings, in which:
FIG. 1 is a front elevational view of a desk clock or timepiece
which has been constructed in accordance with the present
invention;
FIG. 2 is a side elevational view of the clock of FIG. 1 wherein
the respective rotatable discs are shown arranged one on top of the
other;
FIGS. 3a through 3d are front plan views of the respective discs
shown in side elevation in FIG. 2; and
FIG. 4 shows a pair of rotatable discs in perspective to illustrate
the traveling zone effect.
Referring now to the drawings, a timepiece in the form of a desk or
table clock 10 is shown in FIGS. 1 and 2, which timepiece has been
constructed in accordance with the present invention. As previously
mentioned, however, the invention itself is in no way limited to
timepieces, but may be utilized advantageously in a wide variety of
applications where it is desired to visually display derived
information. Incorporation into timepieces is but one such
advantageous application.
As seen in FIGS. 1 and 2, timepiece 10 includes a housing 12
integral with an L-shaped pedestal or base 14. A transparent cap 16
covers the front of the dial face. As best seen in FIG. 2, a
plurality of hollow shafts, rotatably mounted within housing 12,
extend laterally outward from the dial face. Shaft 20a, utilized
for rotatably indicating "seconds," is turnably mounted within a
hollow shaft 20b, the latter rotatably indicating "minutes." Shaft
20b, is in turn mounted within a further hollow shaft 20c for
indicating "hours." The mechanism for selectively rotating the
shafts 20a through 20c is not shown in detail since it forms no
part of the present invention, and further, is conventional in any
clock or watch, and accordingly will be readily understood by those
skilled in the art.
The time indicating elements for timepiece 10 are provided in the
form of a plurality of transparent disc members 30, 32, 34 and 36
arranged one on top of another on the dial face (FIG. 2), and which
are shown individually in plan view in FIGS. 3a through 3c. As
indicated, disc 32 is mounted upon and is rotated by shaft 20c and,
as will be explained subsequently, is effective to indicate
"hours." That is, it is effective in combination with the base, or
master, disc member 30, the latter being attached directly to the
dial face of the timepiece 10 and remains stationary at all
times.
In like manner, the disc 34 is mounted on and is rotated by the
control shaft 20b. Disc 34, in association with master disc 30, is
effective to indicate "minutes." Moreover, whereas the hour disc 32
is substantially the same size or diameter as the master disc 30,
disc 34 is somewhat smaller than disc 30. Disc 36, for indicating
"seconds," is constructed to be still smaller than the disc member
34. It is, of course, mounted on and is rotated by the control
shaft 20a.
As will be appreciated in FIG. 1, which shows the disc 30 through
36 in plan view arranged on top of one another, disc 32 may be seen
as a circular strip, with disc 34 being viewed as a still smaller
circular strip co-centric with, but inside, the inner periphery of
disc 32. Disc 36 is viewed as a full circle, but smaller than the
inner periphery of disc 34. The double-circular dots in bullseye,
representing the hours of 12, 3, 6 and 9 together with the single
circles, for the hours of 1, 2, 4, 5, 7, 8, 10 and 11, may be
conveniently etched into or otherwise affixed to the transparent
clock face cover 16.
As might be appreciated, the hour, minute, and second indicating
discs 32, 34 and 36, respectively, are constructed of a suitably
transparent material, such as a medium or heavy gauge plastic or
cellulose acetate sheeting. One such material is available
commercially under the brand name "Plexiglass." In practice, it has
been found that a material of this sort of approximately 0.007
inches thickness provides satisfactory operation in the environment
as herein described. Master disc 30, of course, does not need to be
transparent and accordingly, may be of any suitable material,
including paper stock or the like. In any event, it is attached
directly to the dial of timepiece 10 and the remaining discs rotate
in relation to the stationary master disc 30. The hour, minute and
second bands or rings on master 30 are identified, respectively, at
30a, 30b and 30c (FIG. 3a). In a clockwise direction, each of the
bands or circular segments 30a, 30b and 30c are colored or opaqued
starting at a reference line or radius designated at x. The color
intensity thereof progressively decreases from the full of 100
percent intensity level at reference x until it reaches a nominal 5
percent at substantially full circle. The graduated coloring may be
accomplished by any one of a number of presently known techniques,
such as lithography or an acceptable silk screening process. The
density of the "printing dots" may vary over predetermined range.
However, it has been found that the nominal 120 line density may be
preferred.
It has also been found that it is more desirable to utilize
different colors for the respective bands or segments as depicted
in master disc 30 of FIG. 3a. This enables the eye to quickly
distinguish the respective bands and thereby discern the particuar
time displayed at a quick glance. For example, the outer ring 30a
may be provided as a bright orange coloring, while the ring 30b for
indicating minutes may be attractively portrayed in a lavender
coloring, with the circular center portion occupied by disc 36
being of a less conspicuous color, such as black, since it presents
substantially greater area. It is to be understood, however, that
the specific coloring form no part of the present invention and
should be left entirely to subjective preferences.
The transparent discs 32, 34 and 36 associated with master disc 30
include the same graduating color scheme, except in reverse order.
That is, the progressive decrease in opaqueness or color intensity
is effected in a counter clockwise direction as opposed to the
clockwise direction for disc member 30. In this way, the traveling
zone effect is exhibited when each of the discs 32, 34 and 36
rotate in relation to the master disc 30.
This traveling zone effect may be more readily appreciated upon
reference to FIG. 4 which illustrates a view in perspective of disc
36 in rotative relation to the center portion 30c of disc 30. As
disc 36 rotates, say in a clockwise direction, the full or 100
percent color intensity area following reference line X overlaps
the full color intensity area of disc portion 30c which begins at
reference line X, thereby creating a wedge-shaped zone of visibly
darker tone or shading. This zone continues to expand arcuately as
disc 36 is rotated by the shaft 20a until reference line X travels
full circle and the cycle then repeats. The same traveling zone
effect is obtained by disc member 32 in combination with the inner
strip portion or ring 30b of master disc 30 and also by disc member
34 in combination with the outer strip portion or ring 30a of disc
30.
While only particular embodiments of the invention have been shown
and described herein, it will be obvious to those skilled in the
art that certain modifications and alternative constructions may be
made without materially departing from the invention in its broader
aspects and, accordingly, the appended claims are intended to cover
all such changes and alternative construction that may fall within
the true scope and spirit of the invention.
* * * * *