SENI
KECANTIKAN & KESEHATAN
KERAJINAN
BUDAYA & SEJARAH
HIBURAN
LINGKUNGAN
MAKANAN & MINUMAN
REKAYASA BALIK
ILMU PENGETAHUAN
OLAHRAGA
TEKNOLOGI
PERANGKAT PAKAI
Potentiometer: Mallory Volume Control on a Tung-Oil Paper Ring
A 1930s radio volume control from Mallory's patent (US 2,144,925, 1939). A carbon ring sits on a base of two resin-fibre discs. A spring arm on the shaft wipes the ring with one contact and a centre metal ring with its fingers, so turning the knob changes the resistance between the centre lug and either end lug. The patent gives no sizes; the parts are named by what they do.
The picture: the patent's drawing (Figs. 1 and 2).
Menengah
2 hours
Instruksi
1
1
Clamp the two base discs on the bushing
Clamp the two base discs on the bushing
Stack two discs of resin-impregnated fibre. A metal bushing through their centres clamps them together, with a metal disc clamped against the back of the rear disc. Ours: close the bushing with a hammer and rivet set.
Material untuk langkah ini:
Cakram Serat Berimpregnasi Resin2 buah
Bus Logam1 buah
Cakram Penopang Logam1 buahAlat yang dibutuhkan:
Palu keling
Set keling2
2
Fit the centre contact ring
Fit the centre contact ring
Lay the metal contact ring, with its own terminal lug, on the face of the front disc, centred. An eyelet (or rivet) through the lug holds it. Ours: set with a rivet set and hammer.
Material untuk langkah ini:
Cincin Kontak dengan Lug Terminal1 buah
Eyelet1 buahAlat yang dibutuhkan:
Palu kelingSet keling3
3
Bolt on the resistance ring
Bolt on the resistance ring
Lay the carbon resistance ring on the front disc, round the contact ring. Two terminal bolts pass through the ring's silver-painted ends and the disc; each holds a terminal lug under the disc. The bolts clamp the ring and connect its ends.
Material untuk langkah ini:
Elemen Resistansi Karbon1 buah
Baut Terminal2 buah
Lug Terminal2 buahAlat yang dibutuhkan:
Tang lancip4
4
Fit shaft and spring contact arm
Fit shaft and spring contact arm
Put the shaft through the bushing. On its front end fix the spring contact arm over a small piece of sheet insulation: upset the shaft end to hold the insulation, and clamp arm and insulation together with a rivet pin. The arm's contactor rides on the carbon track, its fingers on the contact ring.
Material untuk langkah ini:
Poros Kendali1 buah
Lengan Kontak Pegas1 buah
Lembaran Isolasi1 buah
Pin Keling1 buahAlat yang dibutuhkan:
Palu kelingSet keling5
5
Clip washer and cover
Clip washer and cover
Snap a clip washer into the groove in the shaft behind the bushing. It stops the shaft sliding and keeps the arm and fingers pressed on their rings. Fix the metal cover cap over the parts by bending its ears onto the discs.
Material untuk langkah ini:
Ring Klip1 buah
Tutup logam bertelinga1 buahAlat yang dibutuhkan:
Tang lancip
Tang Berujung RataBahan
14- Placeholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- Placeholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- 2 buahPlaceholder
- 2 buahPlaceholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- 1 buahPlaceholder
Cetak biru ini membuat
Blueprint terkait
Blueprint ini berbagi pengetahuan — teknik, bahan, atau prinsip
CC0 Domain Publik
Cetak biru ini dirilis di bawah CC0. Anda bebas untuk menyalin, memodifikasi, mendistribusikan, dan menggunakan karya ini untuk tujuan apa pun, termasuk komersial, tanpa meminta izin.
Dukung Maker dengan membeli produk melalui Cetak Biru mereka di mana mereka mendapatkan Komisi Pembuat yang ditetapkan oleh Penjual, atau buat iterasi baru dari Cetak Biru ini dan masukkan sebagai koneksi di milik Anda sendiri.