SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
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.
Lanjutan
Factory process
Arahan
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.
Bahan untuk langkah ini:
Bekas medan gerudi1 keping
Pemasangan medan magnet kekal1 keping
Angker berlamina berbelit dengan komutator1 keping
Berus perak-grafit dan pemegangnya1 kepingAlatan diperlukan:
Set pemutar skru2
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.
Bahan untuk langkah ini:
Penutup kotak gear gerudi1 keping
Kotak gear gerudi1 keping
Transmisi gerudi dua kelajuan1 keping
Cekam gerudi1 kepingAlatan diperlukan:
Set pemutar skru3
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.
Bahan untuk langkah ini:
Pemegang bateri berongga2 keping
Pek bateri boleh cas gelongsor2 keping
Penutup pemegang lepas cepat2 keping
Pemegang belakang1 kepingAlatan diperlukan:
Set pemutar skru4
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.
Bahan untuk langkah ini:
Sesentuh pegas daun pada blok penebat2 keping
Suis picu berpangsi dengan kunci1 kepingAlatan diperlukan:
Playar pelucut wayar
Playar GabunganSet pemutar skruBahan
14- 1 kepingPemegang Tempat
- 1 kepingPemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- 1 kepingPemegang Tempat
- 1 kepingPemegang Tempat
- 1 kepingPemegang Tempat
- 1 kepingPemegang Tempat
- 2 kepingPemegang Tempat
- 2 kepingPemegang Tempat
- 2 kepingPemegang Tempat
- 1 kepingPemegang Tempat
- Pemegang Tempat
- 1 kepingPemegang Tempat
Alatan Diperlukan
3- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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