UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Air Blow Gun: Press-Button Valve and Conical Air Shield
Harry Yates's air gun (US 2,604,361, 1952) for blowing chips off lathes and drills. A press-button valve is held shut by the line pressure itself; pressed, it lets air into a ribbed nozzle that splits it into a central jet and a cone of air from a ring slot, which keeps flying chips away from the worker's eyes. The rubber valve face comes out by unscrewing one cap.
The patent gives no materials (except the rubber face), threads or sizes; the machine tools named are ours. The picture: the patent's drawing.
Hejuru
1 day
Amabwiriza
1
1
Bore the body
Bore the body
Bore the body's vertical opening: stem bearing (13), wider air passage (14), wider chamber (15) threaded at the bottom (16), with a valve seat rib (17) undercut round its edge. Ours: lathe and boring bar, tap for the thread.
Ibikoresho by'iyi ntambwe:
Umubiri w’imbunda ihuha umwuka1 igiceIbikoresho bikenewe:
Imashini yo guhinguza icyuma
Igiti cyo gukata imbere mu mwobo
Agakoresho ko gukata imizingo y'ibyuma2
2
Bore the hose pocket so it breaks into the chamber
Bore the hose pocket so it breaks into the chamber
Bore and thread the hose pocket (19) so its edge cuts into the chamber, opening the port (20) and leaving a centre projection (21): an overhang that turns incoming air down into the chamber, away from the seat.
Ibikoresho bikenewe:
Imashini yo guhinguza icyumaIgiti cyo gukata imbere mu mwoboAgakoresho ko gukata imizingo y'ibyuma3
3
Bore the barrel
Bore the barrel
Bore the front barrel (11) to a cylindrical pocket (22) joined to the air passage by a tapered passage (23). Bevel the barrel's front end (44).
Ibikoresho bikenewe:
Imashini yo guhinguza icyumaIgiti cyo gukata imbere mu mwobo4
4
Fit stem and press-button
Fit stem and press-button
Pass the valve stem (24) up through the body and press its stud (25) into the socket (27) of the press-button (28). The button slides in the bearing; the stem's flange (26) stops it coming out upward, the button head downward. Ours: arbor press.
Ibikoresho by'iyi ntambwe:
Inkoni ya valve1 igice
Buto ikandwa ya valve1 igiceIbikoresho bikenewe:
Ipiresi y'ukuboko5
5
Make the valve closure
Make the valve closure
Set the rubber valve face (36) in the recess (35) on top of the closure member (30) and press a flanged tubular eyelet (37) into its centre hole (38) to hold it.
Ibikoresho by'iyi ntambwe:
Igice gifunga valve1 igice
Isura ya kawucu ya valve1 igice
Agaterura gafunze1 igiceIbikoresho bikenewe:
Ipiresi y'ukuboko6
6
Close the chamber
Close the chamber
Slide the closure's stud (31) into the pocket (32) of the closure cap (33) and screw the cap into the chamber, a gasket (34) under its flange. The stem's pin (29) rests on the closure. Ours: flat screwdriver in the cap's slot.
Ibikoresho by'iyi ntambwe:
Umupfundikizo ufunga1 igice
Gasiketi ifunga1 igiceIbikoresho bikenewe:
Agafuni k'urwasaya rugororotse7
7
Press in the nozzle
Press in the nozzle
Force the nozzle's ribs (41) into the barrel pocket (22) until its inner end stops on the tapered passage (23). That stop fixes the ring slot (45) between the nozzle's cone shoulder (42) and the barrel bevel (44).
Ibikoresho by'iyi ntambwe:
Umunwa w’umwuka1 igiceIbikoresho bikenewe:
Ipiresi y'ukuboko8
8
Screw on the tip and the hose nipple
Screw on the tip and the hose nipple
Screw the tip (49) into the nozzle's threaded pocket (48); its bore (50) is wider than the jet hole (47) so it does not touch the jet, and it can clamp an extension tube. Screw a hose nipple into the hose pocket (19).
Ibikoresho by'iyi ntambwe:
Isonga ry’umunwa1 igice
Nipeli y’umuyoboro ifite inyuguti1 igiceIbikoresho bikenewe:
Isupana ihinduka9
9
Try the jet and the shield
Try the jet and the shield
Ours: connect an air hose from a compressor. The line pressure alone holds the valve shut. Press the button: a central jet leaves the jet hole, and a cone of air from the ring slot surrounds it.
Ibikoresho bikenewe:
Igikandamiza umwuka
Umupira w'umwukaIbikoresho
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Ibikoresho bikenewe
8- Umwanya
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