Samvinna
LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Bulb Pipette Blown at the Lamp: a Closed Tube Drawn, Bulbed, Pierced and Joined to Two Stems (Soward, 1886)
Alfred Soward's lampwork bulb pipette from Amateur Work (1886), made like his thistle funnel: a 3/8 in. bore tube closed and drawn down onto a 1/8 in. stem, blown into a bulb, a thin second bulb blown and broken off the far side to leave a short neck, and a second stem drawn to a fine capillary tip joined on.
Lengra kominn
An hour once the basic operations are mastered
Leiðbeiningar
1
1
Read Soward
Read Soward
"To make a pipette the process is very similar." (to the thistle funnel)
2
2
Prepare the tubes
Prepare the tubes
Take glass tube of about 1/8 in. (3 mm) bore for the stems and about 3/8 in. (10 mm) bore for the bulb. Close the wide tube at one end in the form of his fig. 41 A, then soften it about an inch from the end and draw it down to the small tube's diameter.
Efni fyrir þetta skref:
Glerrör1 stykkiNauðsynleg verkfæri:
Bunsenbrennari
Glerblásturspípa3
3
Join the first stem
Join the first stem
Cut the drawn, flask-shaped piece off with a file and fuse it to a length of the narrow tube: soften both ends, press them together, pull gently to reduce the thickened joint, and blow a gentle stream of air in.
Efni fyrir þetta skref:
Glerrör1 stykkiNauðsynleg verkfæri:
Þjalir (handþjöl)BunsenbrennariGlerblásturspípa4
4
Blow the bulb
Blow the bulb
Soften the flask part and blow it into a bulb through the stem.
Nauðsynleg verkfæri:
BunsenbrennariGlerblásturspípa5
5
Open the far end
Open the far end
Play the flame on the point opposite the stem (A in fig. 41) and blow a very thin second bulb with a strong blast. Break it away: it leaves a small projecting tube (B).
Nauðsynleg verkfæri:
BunsenbrennariGlerblásturspípa6
6
Draw and join the tip
Draw and join the tip
Draw a second piece of narrow tube to a capillary end: thicken it in the flame, pull the hands apart, cut with a file and hold the cut end a moment in the flame. Join this stem to the projecting tube as before.
Efni fyrir þetta skref:
Glerrör1 stykkiNauðsynleg verkfæri:
Þjalir (handþjöl)BunsenbrennariGlerblásturspípa7
7
Troubleshooting
Troubleshooting
Pipette troubleshooting.
Flow
Loading...
8
8
History and honest limits
History and honest limits
From Alfred W. Soward, "Glass-Blowing for Amateurs" IV, **Amateur Work, Illustrated**, vol. V (1886), pp. 173-176, figs. 39-41 (checked on the archive.org scan amateurworkillus05lond). He gives no volume or graduation: calibrate it by weighing water if you need one (see the graduated-pipette blueprint). Metric figures are ours.
Þessi teikning býr til
Tengd Blueprint
Þessi blueprint deila þekkingu — tækni, efni eða meginreglur
CC0 opinbert ríki
Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.
Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.