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US 4,664,095 AGranted
Safety device for open-type combustor
AssigneeHitachi Heating Appliances Co., Ltd.
InventorsMutsuhiko Takahashi, Minoru Tadokoro, Hiroshi Matsuzaki
Life of this patent
Estimating the term…
Abstract
A safety device for an open-type combustor such as a room-type oil stove which is capable of quickly extinguishing the flame of the combustor upon the occurrence of oxygen starvation but which does not operate unnecessarily during ordinary shut-off operations. A thermally deformable element is mounted in the vicinity of a wick guide cylinder or the like for detecting changes in temperature in case of abnormal combustion. An interlock body provided through an operating lever operates an automatic fire-extinguishing unit in response to the thermally deformable element. An engagement/locking portion is provided in the vicinity of the thermally deformable element for engaging and locking the interlock body.
Claims18
A safety device for an open-type combustor, comprising:
- (a) a wick (1) for supporting combustion;
- (b) a wick guide cylinder (2) for supporting and guiding an inner circumference of said wick;
- (c) an outer-wick-cylinder (3) for supporting and guiding an outer circumference of said wick;
- (d) a thermally deformable element (5) for deforming from a first position to a second position in response to a drop in temperature of the combustion resulting from oxygen starvation in a room containing said open-type combustor, said thermally deformable element being provided proximate to said wick guide cylinder;
- (e) an aseismatic automatic fire-extinguishing unit (7) for extinguishing said fire;
- (f) an interlock body (8) movable from a first location to a second location in response to deformation of said thermally deformable element from said first position to said second position;
- (g) an operating lever (9), engaged with said interlock body, for operating said fire-extinguishing unit to extinguish said fire in reponse to movement of said interlock body from said first location to said second location;
- and
- (h) engagement/locking means (13) for engaging a portion of said interlock body when said deformable element is in said first position and releasing said interlock body when said deformable element is in said second position,
- wherein said interlock body is provided with at least one of a spring (10) and a weight for urging said interlock body in a downward direction toward said second location,
- whereby said fire-extinguishing unit is prevented from extinguishing said fire until said thermally deformable element is in said second position.
8 more elements
A safety device for an open-type combustor, comprising:
- (a) a wick movable to a first height for supporting combustion and to a second height for extinguishing the combustion;
- (b) a wick guide cylinder for supporting and guiding an inner circumference of said wick;
- (c) an outer-wick-cylinder for supporting and guiding an outer circumference of said wick;
- (d) a thermally deformable element for deforming from a first position to a second position in response to a change in temperature of the combustion, said thermally deformable element being provided proximate to one of said wick guide cylinder and said outer-wick-cylinder;
- (e) an aseismatic automatic fire-extinguishing unit for extinguishing said fire;
- (f) an interlock body movable from a first location to a second location in response to deformation of said thermally deformable element from said first position to said second position;
- (g) an operating lever, engaged with said interlock body, for operating said fire-extinguishing unit to extinguish said fire in response to movement of said interlock body from said first location to said second location;
- (h) engagement/locking means for engaging a portion of said interlock body when said deformable element is in said first position and releasing said interlock body when said deformable element is in said second position;
- (i) dry combustion locking means, including a dry combustion lock knob (18) movable to a dry combustion locking position, for locking said interlock body in said first location;
- and
- (j) a normal fire-extinction lock lever (15) for moving said dry combustion lock knob from said dry combustion locking position in response to movement of said wick to said second height for extinguishing the combustion.
8 more elements
A safety device for an open-type combustor, comprising:
- (a) a wick for supporting a fire;
- (b) a wick guide cylinder for supporting and guiding an inner circumference of said wick;
- (c) an outer-wick-cylinder for supporting and guiding an outer circumference of said wick;
- (d) a thermally deformable element for deforming from a first position to a second position in response to a drop in temperature of a fire in said combustor resulting from oxygen starvation in a room containing said open-type combustor, said thermally deformable element being provided proximate to said wick guide cylinder;
- (e) an alarm unit for setting off an alarm;
- (f) an interlock body movable from a first location to a second location in response to deformation of said thermally deformable element from said first position to said second position;
- (g) an operating lever, engaged with said interlock body, for operating said alarm unit in response to movement of said interlock body from said first location to said second location;
- and
- (h) engagement/locking means for engaging a portion of said interlock body when said deformable element is in said first position and releasing said interlock body when said deformable element is in said second position,
- wherein said interlock body is provided with at least one of a spring and a weight for urging said interlock body in a downward direction toward said second location,
- whereby said alarm is prevented from being set off until said thermally deformable element is in said second position.
8 more elements
A safety device for an open-type combustor, comprising:
- (a) a wick movable to a first height for supporting combustion and to a second height for extinguishing the combustion;
- (b) a wick guide cylinder for supporting and guiding an inner circumference of said wick;
- (c) an outer-wick-cylinder for supporting and guiding an outer circumference of said wick;
- (d) a thermally deformable element for deforming from a first position to a second position in response to a change in temperature of the combustion, said thermally deformable element being provided proximate to one of said wick guide cylinder and said outer-wick-cylinder;
- (e) an alarm unit for setting off an alarm;
- (f) an interlock body movable from a first location to a second location in response to deformation of said thermally deformable element from said first position to said second position;
- (g) an operating lever, engaged with said interlock body, for operating said alarm unit in response to movement of said interlock body from said first location to said second location;
- (h) engagement/locking means for engaging a portion of said interlock body when said deformable element is in said first position and releasing said interlock body when said deformable element is in said second position;
- (i) dry combustion locking means, including a dry combustion lock knob movable to a dry combustion locking position, for locking said interlock body in said first location;
- and
- (j) a normal fire-extinction lock lever (15) for moving said dry combustion lock knob from said dry combustion locking position in response to movement to said wick to said second height for extinguishing the combustion.
8 more elements
Dependencies are inferred from the claim text.