High illumination alarm clock

Details High illumination alarm clock High illumination alarm clock

2000-05-05

2002-04-02

Roskoski, Bernard (Department: 2859)

Horology: time measuring systems or devices

Displays or display device details

With auxiliary illumination for display

C368S067000

Reexamination Certificate

active

06366539

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an alarm clock, and particularly to an alarm clock structure where the scales on the clock panel will generate an illuminated state.
2. Prior Art
A prior art alarm clock invented by the applicant is shown in
FIGS. 6
to
8
. The prior art alarm clock has a seat
10
, a substrate
20
, an opaque panel
25
, a cover
28
, and a light emitter
16
. A frame
15
is installed at the front side of the fluorescent indicators
24
on the seat
10
. The frame
15
serves to fix the opaque panel
25
and the transparent mask
28
. A light emitter
16
is installed at a proper position in the inner edge at one side of the frame
15
, and a timer
11
s installed within the seat
10
. A rotary shaft
12
of the timer
11
passes through the central hole
26
of the opaque panel
25
, then, the rotary shaft
12
drives the indicators
18
and
19
to rotate. A time setting indicator
29
is further installed for cooperating with the pressing piece
13
of the alarm clock, so as to complete a basic structure of an alarm clock. The power source of the timer
11
is connected to a battery
17
. A positioning post
14
, is installed within the seat
10
for positioning the circuit board
20
. Two connections
21
and
22
are provided on the circuit board
20
. As the connections
21
and
22
contact a conducting piece
23
, the circuit is closed. The first connection
21
is coupled to one electrode of the battery
17
through an electric wire. The second connection
22
is connected to one pin of the light emitter
16
. Another pin of the light emitter
16
may be connected to another electrode of the battery
17
through an electric wire. Thereby, when the conducting piece
23
on the circuit board
20
contacts the connections
21
and
22
, the two connections on the circuit board
20
will conduct and the light emitter
16
is illuminated to display the scales. However, in the prior art, the right side of the cover
28
must be pressed for actuating the light emitter
16
, i.e., the conducting piece
23
is pressed by pressing the right side of the cover. The light from the light emitter
16
only illuminates the right half of the cover
28
. In the dark, the light from emitter
16
only causes the numerals on the right half of the panel of the clock to be clearly visible, while those on the left half remain in the dark. Moreover, the light impinging on the indicators
18
and
19
is insufficient and thus, they cannot be seen rapidly. Therefore, a longer pressing action to maintain the illumination is required to clearly see the indicators.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide an alarm clock, wherein a special structure is used to guide light into a light guiding plate. The symbols and numerals being indicators of the light guiding plate carrying fluorescent material, they will light up as the light emitter lights up. Thus, all the indicators will be clearly seen, instead of the condition where half of the indicators are illuminated and the other half are dark, as that in the prior art. The present invention provides a uniform light distribution. Light is emitted across the whole face, instead of lighting up a single point. In the present invention, the visibility of the indicators on the panel of a clock is greatly improved. Therefore, the time scale can be seen conveniently, simply and rapidly. In the dark, the right side of the frame is pressed, the light guiding plate is illuminated and the time scale can then be clearly read.
In order to achieve the aforesaid objects, an alarm clock is provided that comprises a seat, a switch, a light emitter, a light guiding plate, a light shielding layer, a timer, a transparent mask, a frame, and a power source. The timer is installed in the seat and drives a rotary shaft to pass out from the light shielding layer and the light guiding plate to be connected to the indicators. The surface of the light guiding plate is arranged with scales and numeral indicators. A frame is fixed at a periphery of the seat, and after the light guiding plate and the light shielding layer are positioned (light shielding plate or a white paint layer), a transparent mask is connected to the inner side of the frame. The seat supports a light emitter and a light emitter switch which are connected with one another. The switch s connected to a power source. Pressing the lateral side of the transparent mask to press the light emitter switch, the light emitter will be energized and thus light up, so that the light from the light emitter passes through a light guide seat of the light guiding plate to all of the indicators with fluorescent material located on the light guiding plate. By use of the light shielding layer, a higher illumination of all the indicators is generated so that the time indicators on the panel can be seen easily.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings.


REFERENCES:
patent: 3574993 (1971-04-01), Black

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