UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Carbon Resistance Element: Lampblack in Alkyd and Chinese Wood Oil on Laminated Phenolic
A carbon resistance film for radio sets. Chicago Telephone Supply's Cooper (US 2,120,930, 1938) found that lampblack bound in phenolic resin kept drifting, so he bound it in alkyd resin modified with Chinese wood oil (tung oil). Sprayed on laminated phenolic and baked up to 165 °C, the film becomes insoluble and holds its value in heat and damp. His mix gave about 50,000 ohms in an element of ordinary size, with a film about 0.003 inch thick.
The picture: our diagram.
Hagati
1 day
Amabwiriza
1
1
Make the binder: 72 alkyd, 28 wood oil
Make the binder: 72 alkyd, 28 wood oil
Mix 72 parts of alkyd resin with 28 parts of Chinese wood oil (tung oil).
Ibikoresho by'iyi ntambwe:
Resine ya alukide Glyptal72 parts
Amavuta ya tungi28 partsIbikoresho bikenewe:
Umunzani w'ibiro
Igikombe cy'Ikirahure
Igikoresho cyo kuvanga
Uturindantoki tw'ikawusu2
2
Mix 25 binder, 14 lampblack, 61 solvent
Mix 25 binder, 14 lampblack, 61 solvent
Thoroughly mix 25 parts of the binder with 14 parts of lampblack and 61 parts of a solvent for the binder. The patent does not name the solvent. Ours: xylene.
Ibikoresho by'iyi ntambwe:
Umukara w'itara14 partsIbikoresho bikenewe:
KsileneUmunzani w'ibiroIgikombe cy'IkirahureIgikoresho cyo kuvanga
Agapfukamunwa gapfuka isura yoseUturindantoki tw'ikawusu3
3
Spray onto laminated phenolic
Spray onto laminated phenolic
Spray the mixture as a thin film onto a base of laminated phenolic. The patent's film is about 0.003 inch thick.
Ibikoresho by'iyi ntambwe:
Ikibaho cya fenoli gikomatanyije1 igiceIbikoresho bikenewe:
Imbunda yo gutera irangi
Igikandamiza umwukaAgapfukamunwa gapfuka isura yoseUturindantoki tw'ikawusu4
4
Bake: 40 °C up to 165 °C, hold 1 hour
Bake: 40 °C up to 165 °C, hold 1 hour
Put it in an oven at about 40 °C, raise the heat gradually over one hour to 165 °C and hold there one more hour. Take it out and let it cool; it is ready for use.
Ibikoresho bikenewe:
Ifuru yo kumishaho
Igipimo cy'ubushyuhe cy'itanura
Uturindantoki twihanganira ubushyuheIbikoresho
4- 72 partsUmwanya
- 28 partsUmwanya
- 14 partsUmwanya
- Umwanya
Ibikoresho bikenewe
11- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- 1 vendor sell this, none ship to you yetUmwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
Glyptal Resin from Glycerin and Phthalic Anhydride: Callahan, 1914
na Charlie
Kamere
20
0
0
0
0
0
Tung Oil Pressed from the Seeds of Tung Nuts
na Mary
Ububaji
8
0
0
0
0
0
Making Lampblack Pigment — Collecting Carbon Soot from a Burning Flame
na Charlie
UBUHANZI
184
0
0
0
6
0
Akaga
Laminated Phenolic Paper Sheet: Bakelite-Coated Kraft Paper Hot-Pressed and Baked (O'Conor, Westinghouse 1918)
na Charlie
By'Inganda
1
0
0
0
0
0
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.