UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Heavy-Duty Battery-Powered Electric Drill: Riley & Elligson, 1965
Robert H. Riley Jr. and Daniel M. Elligson of Black & Decker patented a cordless drill in 1965, US 3,213,305, with about the torque of a corded half-inch drill, for contractors and line workers. A permanent-magnet DC motor drives the chuck through a two-speed gearbox. Two hollow side handles each hold a slide-out pack of rechargeable nickel-cadmium or silver-cadmium cells, wired in series with the motor and a trigger switch. Their working model had 18 silver-cadmium cells, about 25 volts in all, and gave 550 rpm in high and 225 rpm with 28 foot-pounds of torque in low. The low voltage made it safe in ordinarily hazardous conditions, such as boat maintenance and repair.
Osezingeni eliphezulu
Factory process
Imiyalelo
1
1
Field case and motor
Field case and motor
Retain the field assembly, two permanent-magnet tubular segments glued inside a concentric sleeve, in the field case. Fit the brushholders in two bosses at the rear, with silver-graphite brushes riding on the commutator of the wound laminated armature. The working model's armature has 16 slots, each with 10 turns of No. 18 wire.
Izinto zokwakha zalesi sinyathelo:
Ikesi le-field lomshini wokubhoboza1 ucezu
Ukuhlanganiswa kwe-field kazibuthe ohlala njalo1 ucezu
I-armature ye-laminated esongiwe ene-commutator1 ucezu
Amabhulashi esiliva-graphite nezibambi zawo1 ucezuAmathuluzi adingekayo:
Isethi yezikulufudrayiva2
2
Gear case
Gear case
Secure the gear case cover ahead of the field case and the gear case ahead of that. The armature pinion drives an intermediate gear and shaft carrying two pinions; a gear cluster slides on the splined output spindle, and a shift lever turning an eccentric shaft through about 180 degrees moves it to mesh one pinion or the other, for high or low speed. Fit the chuck on the spindle.
Izinto zokwakha zalesi sinyathelo:
Isivalo sekesi lamagiya omshini wokubhoboza1 ucezu
Ikesi lamagiya omshini wokubhoboza1 ucezu
I-transmission yomshini wokubhoboza enesivinini esibili1 ucezu
I-chuck yomshini wokubhoboza1 ucezuAmathuluzi adingekayo:
Isethi yezikulufudrayiva3
3
Battery handles
Battery handles
Screw a hollow handle to each side of the field case, in line with each other and across the drill's axis. Slide a battery pack into each from its open end and close it with a quick-release cover held by a locking spring, with a leaf spring pressing the pack onto the contacts. Fit the end handle at the rear.
Izinto zokwakha zalesi sinyathelo:
Isibambo sebhethri esingenalutho2 izicucu
Iphakethe lebhethri elishajwayo elikhishwa ngokushelela2 izicucu
Isivalo sesibambo esikhululeka ngokushesha2 izicucu
Isibambo sangemuva1 ucezuAmathuluzi adingekayo:
Isethi yezikulufudrayiva4
4
Contacts and trigger
Contacts and trigger
Secure an insulated block with leaf-spring contacts at the top and bottom of the field case to meet each pack's terminals, and wire the packs, the switch contacts and the brushes in series. Pivot the spring-loaded trigger on the gear case cover so its contact bridges the two switch buttons; a sliding pin locks it on or off.
Izinto zokwakha zalesi sinyathelo:
Okuxhumana kwe-leaf spring ebhulokini lokuvikela2 izicucu
Iswishi yesibamba ejikelezayo enokukhiya1 ucezuAmathuluzi adingekayo:
Isihlubuli sikawaya
Udlawu OluhlanganisiweIsethi yezikulufudrayivaIzinto
14- Isibambeli
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- 1 ucezuIsibambeli
- 2 izicucuIsibambeli
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- 1 ucezuIsibambeli
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Amathuluzi Adingekayo
3- Isibambeli
- Isibambeli
- Isibambeli
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