Ushirikiano
SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Electric Kettle: Immersion Heater with a Steam and Switch-On-Dry Cut-Out (Taylor, US 4,358,666)
An automatic electric kettle boils water with an immersion heater and switches itself off. J. C. Taylor (US 4,358,666, 1982) mounts one control on the heater's head: a bimetal disc touching the hot head cuts the power if the kettle is switched on dry, and a second bimetal disc in the steam trips an over-centre lever that cuts it when the water boils.
In his kettle (Fig. 14) the steam leaves through a hole high in the wall and runs down a passage between the handle and the wall to the control. A knob resets it.
Source: J. C. Taylor, US Patent 4,358,666 (filed 1980, granted 1982). Picture: its Fig. 14.
Juu
Unknown
Maagizo
1
1
Read Taylor
Read Taylor
"The effect is that when the water boils, the lever 16 is tripped by the actuator 22 from its first to its second position, thus interrupting the supply of electricity to the heating element."
2
2
Fit the immersion heater
Fit the immersion heater
Make the kettle body with a spout, lid and handle, an opening low in the back wall for the heater head and a hole high in the wall under the handle for steam. Fix the immersion heater's head watertight in the low opening, with its element low in the kettle and its hot return brazed to the head so the head heats up if the element runs dry. Form a steam passage between the handle and the wall from the high hole down to the head. Body material, size and heater rating are not given.
Vifaa kwa hatua hii:
Metali isiyojulikana1 kettle body
Kipengele cha kupasha joto1 immersion heaterZana zinazohitajika:
Kichomeo cha kulehemu kwa shaba
Kekee cha Nguzo
Seti ya vichimbuzi
Njia ya kuunda isiyojulikana
Vipimo visivyojulikana3
3
Build the switch-on-dry unit
Build the switch-on-dry unit
On the head mount a switch unit with three pins (line, neutral and earth) for the kettle lead's socket. Wire the line pin to one cold end of the element through a movable contact on a springy conductive strip and a fixed contact. Rivet the tongue of a snap-acting bimetal disc to a pillar so its body touches the head. Fit a sliding link that the disc pushes: at about 120 °C (Taylor: "say 120° C.") the disc snaps over and the link parts the contacts.
Vifaa kwa hatua hii:
Kihami kisichojulikana1 switch unit bodyMetali isiyojulikana1 pins, contacts and strip
Ukanda wa metali mbili1 dry-switch discZana zinazohitajika:
Kekee cha NguzoSeti ya vichimbuzi4
4
Make the steam unit
Make the steam unit
Press a disc of sheet bimetal into a domed die, with a cut-out that leaves a tongue in the middle, so it snaps over when steam heats it. Mount it by its rim on a lever that rocks on two knife edges in notches of a body seated over the switch unit, held by two over-centre C-springs, with a shroud round the pins and a steam opening sealed by an O-ring. A finger of the lever passes through the sliding link; a knob on the lever comes out through the housing. The trip temperature and bimetal grade are not given.
Vifaa kwa hatua hii:
Ukanda wa metali mbili1 steam discKihami kisichojulikana1 steam unit body and lever
Springi2 C-springs
Pete ya O1 kipandeZana zinazohitajika:
Njia ya kuunda isiyojulikana5
5
Close up and use
Close up and use
Screw the outer housing over both units into the threaded pillars, the knob through its opening and the steam passage meeting the steam unit's channel. Fill, plug in the lead and press the knob down to close the contacts. When the water boils, steam reaches the disc, the lever snaps over and the power goes off; switched on dry, the head heats and the other disc cuts it and holds the lever off. Press the knob to reset.
Vifaa kwa hatua hii:
Kihami kisichojulikana1 outer housing
Waya laini yenye plagi1 kettle lead with socketVifaa
7- 1 pins, contacts and stripKishikilia Nafasi
- 1 immersion heaterKishikilia Nafasi
- 1 outer housingKishikilia Nafasi
- 1 steam discKishikilia Nafasi
- 2 C-springsKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
- 1 kettle lead with socketKishikilia Nafasi
Zana Zinazohitajika
5- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.