UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Dial Gauge: Logan, 1883
John Logan of Waltham, Massachusetts, patented this dial gauge in 1883, US 283,627. A gauging bar slides lengthwise through guides in a case with a graduated dial. A chain fixed to the bar is wound round the arbor that carries the pointer, so when the bar moves the chain unwinds and turns the pointer. The pointer's end moves much further than the bar, which makes the reading very delicate. A spring on the arbor winds the chain back and returns the bar to zero. A jaw on the case and a jaw on the bar make it a caliper; a slender rod beside the bar's other end makes it a depth gauge.
Hejuru
Workshop process
Amabwiriza
1
1
Case and dial
Case and dial
Make the case with the graduated dial, with tubular guide projections at opposite sides for the gauging bar.
Ibikoresho by'iyi ntambwe:
Agasanduku k'igipimo gifite isura ifite ibipimo1 igice2
2
Arbor, chain and bar
Arbor, chain and bar
Pivot the arbor carrying the pointer at the dial's centre. Pass the gauging bar through the guides and connect it to the arbor by a chain fixed to the bar and wound round the arbor.
Ibikoresho by'iyi ntambwe:
Umurongo-shingiro w'urushinge n'urushinge1 igice
Inkoni ipima1 igice
Umunyururu muto1 igiceIbikoresho bikenewe:
Umutwe w'udufatanyo tunoze
Ikusanyirizo ry'ibitorezi3
3
Return spring
Return spring
Connect a spring between the arbor and the case so that it turns the arbor to wind the chain and draws the bar back to the zero position.
Ibikoresho by'iyi ntambwe:
Resoro isubiza umurongo-shingiro1 igiceIbikoresho bikenewe:
Umutwe w'udufatanyo tunoze4
4
Jaws and depth rod
Jaws and depth rod
Fix a jaw on the case and a matching jaw on the bar; when they touch, the pointer reads zero. Fix a slender gauging rod beside the guide at the other end, in line with the bar's end at zero, for measuring depths.
Ibikoresho by'iyi ntambwe:
Imisaya ya kaliperi1 igice
Inkoni ipima ubujyakuzimu1 igiceIbikoresho bikenewe:
Ikusanyirizo ry'ibitoreziIbikoresho
7- Umwanya
- Umwanya
- 1 igiceUmwanya
- 1 igiceUmwanya
- Umwanya
- 1 igiceUmwanya
- 1 igiceUmwanya
Ibikoresho bikenewe
2- Umwanya
- Umwanya
Iki gishushanyo gikora
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