Pakikipagtulungan
SINING
BEAUTY AT WELLNESS
CRAFTS
KULTURA AT KASAYSAYAN
LIBANGAN
KAPALIGIRAN
PAGKAIN AT INUMIN
REVERSE ENGINEERING
AGHAM
ISPORTS
TEKNOLOHIYA
MGA WEARABLE
Potentiometer: Mallory Volume Control on a Tung-Oil Paper Ring
L. E. Lawrence and R. O. Lewis · Public domain (expired patent)
Ed

Nilikha ni

Ed

21. Oktubre 2026FI
21
0
0
0
0

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).
Katamtaman
2 hours

Mga Tagubilin

1

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.

Mga materyales para sa hakbang na ito:

Fibre disc na binabad sa resinFibre disc na binabad sa resin2 piraso
Metal na bushingMetal na bushing1 piraso
Metal na backing discMetal na backing disc1 piraso

Mga kailangang kasangkapan:

Martilyong pang-remachesMartilyong pang-remaches
Set ng remachesSet ng remaches
2

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.

Mga materyales para sa hakbang na ito:

Contact ring na may terminal lugContact ring na may terminal lug1 piraso
EyeletEyelet1 piraso

Mga kailangang kasangkapan:

Martilyong pang-remachesMartilyong pang-remaches
Set ng remachesSet ng remaches
3

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.

Mga materyales para sa hakbang na ito:

Elementong Panlaban ng CarbonElementong Panlaban ng Carbon1 piraso
Terminal boltTerminal bolt2 piraso
Terminal lugTerminal lug2 piraso

Mga kailangang kasangkapan:

Plais na matulis ang ngusoPlais na matulis ang nguso
4

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.

Mga materyales para sa hakbang na ito:

Control shaftControl shaft1 piraso
Spring contact armSpring contact arm1 piraso
Insulating sheetInsulating sheet1 piraso
Rivet pinRivet pin1 piraso

Mga kailangang kasangkapan:

Martilyong pang-remachesMartilyong pang-remaches
Set ng remachesSet ng remaches
5

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.

Mga materyales para sa hakbang na ito:

Clip na washerClip na washer1 piraso
Metal na takipMetal na takip1 piraso

Mga kailangang kasangkapan:

Plais na matulis ang ngusoPlais na matulis ang nguso
Plais na Patag ang NgusoPlais na Patag ang Nguso

Mga Materyales

14

Mga Kinakailangang Kasangkapan

4

Ang blueprint na ito ay gumagawa ng

Thumbnail
Placeholder

Potensiyometro

Free

161
0
1

Kaugnay na Blueprint

Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo

Carbon Resistance Ring: Laminated Paper Gelled with 10% Tung Oil, Graphite-Shellac Track

Carbon Resistance Ring: Laminated Paper Gelled with 10% Tung Oil, Graphite-Shellac Track

ni EdFI

Electronics

15
0
0
0
0
0
Carbon Resistance Ring: Laminated Paper Gelled with 15% Tung Oil, Graphite-Shellac Track

Carbon Resistance Ring: Laminated Paper Gelled with 15% Tung Oil, Graphite-Shellac Track

ni EdFI

Electronics

21
0
0
0
0
0

CC0 Pampublikong Domain

Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.

Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.

Talakayan

(0)

Mag-login upang sumali sa talakayan

Naglo-load ng mga komento...