UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Carbon Resistance Ring: Laminated Paper Gelled with 10% Tung Oil, Graphite-Shellac Track
Mallory's quiet volume-control ring (US 2,144,925, 1939). Hard bases were noisy and soft paper ones changed with damp. Their answer: paper rings soaked in 10 % raw tung oil and baked, so the oil gels inside the paper. It shuts out moisture but stays soft and springy, and the wiper runs on it quietly. A graphite paint makes the track, silver paint the ends.
The picture: the patent's drawing (Fig. 3).
Hagati
1 day
Amabwiriza
1
1
Punch rings from three-ply paper
Punch rings from three-ply paper
The base is three papers stuck into one sheet: litho paper at the back, newsprint in the middle, manila on the face that takes the track. Punch rings from it. Ours: a punch press with a ring die.
Ibikoresho by'iyi ntambwe:
Impapuro eshatu zifatanye1 igiceIbikoresho bikenewe:
Imashini ikanda itobora
Ikibaho cyo gucamo impeta
Uturindantoki tw'ikawusu2
2
Soak 1 hour in 10 % tung oil in naphtha
Soak 1 hour in 10 % tung oil in naphtha
Soak the rings for about one hour in about 10 % raw tung oil in naphtha. Use raw oil, not heat-bodied or treated oil, so it can still gel.
Ibikoresho by'iyi ntambwe:
Amavuta ya tungi10 partsIbikoresho bikenewe:
Nafita
Igikombe cy'Ikirahure
Umunzani w'ibiro
Igikoresho cyo kuvanga
Agapfukamunwa gapfuka isura yoseUturindantoki tw'ikawusu3
3
Air-dry, then bake at 210–250 °C
Air-dry, then bake at 210–250 °C
Dry the rings in air for two hours or more, then bake 15 to 30 minutes at 210 to 250 °C. The oil gels in the paper's pores; the paper stays pliable.
Ibikoresho bikenewe:
Ifuru yo kumishaho
Igipimo cy'ubushyuhe cy'itanura
Uturindantoki twihanganira ubushyuhe4
4
Spray the graphite track
Spray the graphite track
Spray on the resistance paint, for example graphite in a shellac binder. The patent gives no proportions. The track can be tapered in thickness, width or mix to shape the resistance curve.
Ibikoresho by'iyi ntambwe:
Ifu ya girafite1 as required
Sherake1 as requiredIbikoresho bikenewe:
Imbunda yo gutera irangi
Igikandamiza umwukaAgapfukamunwa gapfuka isura yoseUturindantoki tw'ikawusu5
5
Paint silver ends, bake at 220 °C
Paint silver ends, bake at 220 °C
Spray or paint the two end terminals with silver particles in shellac. Dry, then bake at about 220 °C to cure and harden the track. The slight warp from soaking flattens out again.
Ibikoresho by'iyi ntambwe:
Irangi rya feza rinyuza amashanyarazi1 as requiredIbikoresho bikenewe:
Imbunda yo gutera irangiIfuru yo kumishahoIgipimo cy'ubushyuhe cy'itanuraUturindantoki twihanganira ubushyuheIbikoresho
5- 1 igiceUmwanya
- 10 partsUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
13- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- 1 vendor sell this, none ship to you yetUmwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
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.