Kerjasama
SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
Water Bath: Copper Tank with Plug-In Heaters and an Air-Tube Thermostat (Lidberg, US 1,397,766, 1921)
An electric constant-temperature water bath for laboratory and bacteriological work. A copper tank sits in an insulated fibre-board box; two heater tubes and a thermostat tube are soldered through its wall so the heating coils and the switch plug in from outside. A switch adds extra coils to heat the water up quickly; then the thermostat alone holds the set temperature. Perforated trays on adjustable rods hold the tubes or flasks at the depth you choose.
Result: a thermostatic water bath that holds its water at a set temperature.
Source: T. Lidberg (Chicago Surgical & Electrical Co.), US 1,397,766 (1921). Unknown: sizes, the temperature range, the heater wire. Picture: the patent drawing.
Pertengahan
Unknown
Arahan
1
1
Build the insulated tank
Build the insulated tank
Make a rectangular box of fibrous board on four short legs and line it with hair felt or cloth. Set a sheet copper tank inside, its walls a little taller than the box and turned over the top edge as a bead. Make perforated trays of several shelves, each with an upright rod hooked at the top for lifting, and on each rod a sliding clip with a set screw whose end rests on the tank edge, to set how deep the tray hangs. Not given: sizes.
Bahan untuk langkah ini:
Bahan tidak diketahui1 fibrous board box, legs
Kain tidak diketahui1 hair felt or cloth lining
Kepingan Tembaga1 tank
Plat ayak berlubang1 trays
Logam tidak diketahui1 rods, clips
Skru mesin1 kepingAlatan diperlukan:
Gunting kepingan logam
Alat pematerian
Dimensi tidak diketahui2
2
Fit the heater tubes
Fit the heater tubes
Solder two watertight tubes across the tank, each closed at its inner end and open outside the wall, and a third for the thermostat. For each heater, wind two coils on a rod held in the tube by an insulating disk and an end head; join one end of each coil to the rod and the others to plates on the head, and cover the terminals with a cap plate. Slide each heater into its tube. Ours: nichrome wire. Not given: the coil ratings.
Bahan untuk langkah ini:
Tiub tembaga3 heater and thermostat tubes
Pateri timah-plumbum1 as needed
Dawai nikrom1 four coilsLogam tidak diketahui2 rods, plates, caps
Bahan penebat tidak diketahui1 disks, headsAlatan diperlukan:
Alat pematerian
Gergaji Besi3
3
Make the air-tube thermostat
Make the air-tube thermostat
In the closed thermostat tube, mount on an insulating disk a strip carrying a thermostatic bar with a contact at its free end. Facing it, pivot an adjustable bar with its own contact on a bracket in the tube's insulating head, held by a spring against an adjusting screw with a knob outside: turning it sets the temperature at which the contacts open. Bridge the contacts with a condenser to stop sparking. The air in the tube takes the bath's temperature and bends the bar. Ours: a bimetallic strip.
Bahan untuk langkah ini:
Jalur dwilogam1 thermostatic barLogam tidak diketahui1 strip, bar, bracket, contacts, screwBahan penebat tidak diketahui1 disk, head
Set Spring Mampatan1 keping
Kit Kapasitor1 spark condenserAlatan diperlukan:
Set pemutar skru4
4
Wire and use it
Wire and use it
Wire one coil of each heater through the thermostat, and the other coil of each through a hand switch, with a lamp across the supply to show when current flows. To start, close the switch so all four coils heat the water up. Once it is at temperature, open the switch: the thermostat then switches its two coils on and off to hold the bath steady. Lower the trays of tubes or flasks to the depth wanted.
Bahan untuk langkah ini:
Suis togol1 keping
Pemegang mentol1 keping
Mentol lampu1 keping
Kord fleksibel berpalam1 kepingAlatan diperlukan:
Set pemutar skruBahan
17- 1 fibrous board box, legsPemegang Tempat
- 1 hair felt or cloth liningPemegang Tempat
- 1 tankPemegang Tempat
- 1 traysPemegang Tempat
- 1 strip, bar, bracket, contacts, screwPemegang Tempat
- 1 kepingPemegang Tempat
- 3 heater and thermostat tubesPemegang Tempat
- 1 as neededPemegang Tempat
- 1 four coilsPemegang Tempat
- 1 disk, headPemegang Tempat
- 1 thermostatic barPemegang Tempat
- 1 kepingPemegang Tempat
- 1 spark condenserPemegang Tempat
- Pemegang Tempat
- 1 kepingPemegang Tempat
- 1 kepingPemegang Tempat
- 1 kepingPemegang Tempat
Alatan Diperlukan
5- Pemegang Tempat
- 2 vendors sell this, none ship to you yetPemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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