Ukusebenzisana
UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
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.
Ophakathi
Unknown
Imiyalelo
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.
Izinto zokwakha zalesi sinyathelo:
Okokwakha okungaziwa1 fibrous board box, legs
Indwangu engaziwa1 hair felt or cloth lining
Ishidi Lethusi1 tank
Ipuleti lesihlungo elinezimbobo1 trays
Insimbi engaziwa1 rods, clips
Izikulufu zomshini1 ucezuAmathuluzi adingekayo:
Isikeli sensimbi
Insimbi yokushisela
Izilinganiso ezingaziwa2
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.
Izinto zokwakha zalesi sinyathelo:
Ishubhu lethusi3 heater and thermostat tubes
I-solder ye-tin nomthofu1 as needed
Ucingo lwe-nichrome1 four coilsInsimbi engaziwa2 rods, plates, caps
Into evimbela ugesi engaziwa1 disks, headsAmathuluzi adingekayo:
Insimbi yokushisela
Isaha Sensimbi3
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.
Izinto zokwakha zalesi sinyathelo:
Ucezu lwezinsimbi ezimbili1 thermostatic barInsimbi engaziwa1 strip, bar, bracket, contacts, screwInto evimbela ugesi engaziwa1 disk, head
Isethi Yezinsimbi Ezisontekile Zokucindezela1 ucezu
Isethi Yamakhapheshitha1 spark condenserAmathuluzi adingekayo:
Isethi yezikulufudrayiva4
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.
Izinto zokwakha zalesi sinyathelo:
Isivula esinesikhonkwane1 ucezu
Isokhethi yebhalbhu1 ucezu
Ilambu1 ucezu
Intambo egobekayo enepulaki1 ucezuAmathuluzi adingekayo:
Isethi yezikulufudrayivaIzinto
17- 1 fibrous board box, legsIsibambeli
- 1 hair felt or cloth liningIsibambeli
- 1 tankIsibambeli
- Isibambeli
- 1 strip, bar, bracket, contacts, screwIsibambeli
- 1 ucezuIsibambeli
- 3 heater and thermostat tubesIsibambeli
- 1 as neededIsibambeli
- 1 four coilsIsibambeli
- 1 disk, headIsibambeli
- 1 thermostatic barIsibambeli
- Isibambeli
- 1 spark condenserIsibambeli
- Isibambeli
- 1 ucezuIsibambeli
- 1 ucezuIsibambeli
- 1 ucezuIsibambeli
Amathuluzi Adingekayo
5- Isibambeli
- 2 vendors sell this, none ship to you yetIsibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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