Electricity: electrothermally or thermally actuated switches – Thermally actuated switches
Reexamination Certificate
2001-01-10
2003-02-18
Vortman, Anatoly (Department: 2835)
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
C337S020000, C337S014000, C200S012000, C431S080000, C361S162000, C236S06800R
Reexamination Certificate
active
06522235
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Technical Field of the Invention
The present invention relates to a heating device switch, and in particular, a switch structure with a main flame air outlet, a second flame outlet and a thermocouple insertion hole having an opening facing upward.
(b) Description of the Prior Art
A conventional heating device which is used to provide heat to a room is shown in FIG.
1
. The lower end of the heating device is provided with a gas tank
12
and the top end of the heating device is provided with a cylindrical housing
11
. The top end opening of the gas tank
12
is connected to an air tube
13
and the middle section of the air tube
13
is provided with a switch
20
. The manual control rod
26
of the switch
20
passes through the housing
10
for the operation of the user. The top end of the air tube
13
is provided with a burner
15
. When t user turns on the switch
20
, the gas tank
12
provides gas to produce heat, and the top end of the housing
10
is provided with an arc-shaped reflective hood
16
so as to allow heat energy to disperse downward.
The structure of he switch
20
is shown in
FIGS. 2 and 3
. The main body
21
of the conventional switch
20
is formed into a passage
22
. The passage
22
has an air inlet
23
with an opening facing downward, and an air outlet
24
with an opening facing award and the main body
21
is formed into a second flame air outlet
25
of horizontal shape, and the second flame outlet
25
is a horizontal thermocouple insertion hole
28
with a 90 degree inclination angle. The interior of the passage
22
is mounted with a manual control rod
26
, and a stopper
27
is mounted on the manual control rod
26
. On the stopper
27
, there are two through holes
270
corresponding to the flame outlet
24
and the second flame outlet
25
such that when the manual control rod
26
rotates, the respective holes
270
align with the main flame outlet
24
and the second flame air outlet
25
. The passage
22
within the thermocouple insertion hole
28
is provided with an electromagnetic valve
29
, and the electro-magnetic valve
29
is provided with a plug body
290
having a stepped, protruded edge
220
to block the step so as to block the air inlet
23
and the passage
22
between the main flame air outlet
24
and the second flame air outlet
25
.
The main flame air outlet
24
is connected to the burner
15
, and the air inlet
23
is connected to the gas tank
12
. The second flame air outlet
25
employs a soft tube to guide the air to the surrounding of the thermocouple insertion hole
28
for the thermocouple after the electromagnetic valve
29
is in alignment (not shown). When the user presses downward and rotates the manual control rod
26
, the plug body
290
of the electromagnetic valve
29
is suitably pushed, and the gas flows via the passage
22
and the through hole
270
of the stopper
27
to the main flame air outlet
24
and the second flame air outlet
25
. Due to rotating of the manual control rod
26
, the burner
15
is triggered and the gas from the second flame air outlet is burnt and heat is provided. The electromagnetic valve
29
attracts the plug body
290
such that the gas from the main flame air outlet
24
to the burner
15
is maintained until the manual control rod
26
is rotated to its original position. The through holes
270
do not align with the main flame air outlet
24
md the second air outlet
25
, and the gas supply is cut off and the thermocouple is not heated, and the plug body
290
is restored to cut off the passage
22
. This will close the burner
15
.
The above conventional structure has the following drawbacks:
(1) Assemble problem
the air inlet
23
and thee flame air outlet
24
are not on the same axis, and the direction of openings of the outlet
24
and the second flame air outlet
25
is different. A conversion connector
30
is employed to the main flame air outlet
24
such that the air inlet hole
23
and the man flame outlet
24
are stopped at one axis. In addition, a soft tube has to bused in order to guide gas from the outlet
25
to the thermocouple. Thus, the assemble procedures of this structure are complicated and not convenient.
(2) Passage of flow is not smooth
The design of the passage
22
within the main body
21
of the switch
20
is not appropriate. The inlet
23
and the various outlets are not at the same direction. Thus, the flow of air stream is not smooth and the complete burning of gas is affected.
(3) High cost of production
in view of the above, due to the complicated assembly, or the parts of the structure more man power, time and production cost are involved and is will lower the production rate. As a result, the production cost is increased.
(4) Low safety
The safety of the structure is low for the reason that the burning of the gas is incomplete. The soft tube can be easily torn and gas will leak.
(5) Low stability
Due to the positions of the openings being not at the same direction, the weight center of the heater is biased at one side.
This will affect the stability of the heating device.
Accordingly it is a main object to mitigate the above drawbacks by providing a switch structure for a heating device.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a switch structure for a heating device wherein the main flame air outlet, the thermocouple insertion hole and the second flame air outlet are opened in an upward direction, and the main flame air outlet and the air inlet are located on the same axis, thereby the assemble of the lighting rod, the thermocouple and the main flame air tube is convenient, and the weight center of the heating device after the pipes are mounted will maintaining at the center point to increase the stability of the heating device.
Yet a further object of the present invention is to provide a switch structure for a heating device, wherein the guiding hole between the switch passage and the second flame outlet is provided with an adjusting screw, the adjusting screw is mounted with a sealing element which can provide air sealing, and the adjusting screw, corresponding to the second flame outlet hole, is provided with a cylindrical plug so as to control the size of air venting of second flame air outlet to achieve the object of controlling the size of the second flame.
The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. Many other advantages and features of the present invention will become manifest to those versed in the art upon reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
REFERENCES:
patent: 3597138 (1971-08-01), Ray
patent: 3685730 (1972-08-01), Katchka
patent: 3763875 (1973-10-01), Mobus et al.
patent: 3810249 (1974-05-01), McGowan
patent: 3843049 (1974-10-01), Baysinger
patent: 4267859 (1981-05-01), Dykzeul
patent: 4285662 (1981-08-01), Katchka et al.
patent: 4304249 (1981-12-01), White
patent: 5326029 (1994-07-01), Schultz
patent: 5484103 (1996-01-01), Schultz
patent: 6027335 (2000-02-01), Griffioen
patent: 2001/0022198 (2001-09-01), Kuriyama et al.
patent: 3105391 (1982-09-01), None
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