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Push Button: Normally Open Momentary Switch with a Cushioned Contact (De Reamer, GE 1939)
Ed

Imeundwa na

Ed

28. Oktoba 2026FI
2
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Push Button: Normally Open Momentary Switch with a Cushioned Contact (De Reamer, GE 1939)

A panel push button that closes a circuit only while you press it. A spring holds the button out, and a metal rim on the end of its rod sits clear of two contacts. Press it and the rim bridges both contacts. A second spring inside the button lets the rod give, so the contacts never take more than that spring's force. Source: Frank C. De Reamer, US 2,166,803 (General Electric, 1939), Fig. 5. Unknown: the insulating material, the metals and every size. De Reamer gives none of them, so they are linked to unknown heads. The tools are ours. Picture: the patent's Fig. 5.
Juu
2 days

Maagizo

1

Mould the housing

Mould a cup-shaped housing of insulating material, with a boss on each of two opposite sides, a recess in the top of each boss, a groove inside below each boss, and a bead round the top. Unknown: the material, the sizes and the moulding.

Vifaa kwa hatua hii:

Kihami kisichojulikanaKihami kisichojulikana1 as required

Zana zinazohitajika:

Kalibu ya kubanaKalibu ya kubana
Vipimo visivyojulikanaVipimo visivyojulikana
2

Make the terminals and contacts

Bend two angled metal strips. The upper end of each sits in a boss recess, and the lower end is a solder lug. Fix each upper end to a contact that fits the groove inside the housing, stepped at its bottom end. Unknown: the metal.

Vifaa kwa hatua hii:

Metali isiyojulikanaMetali isiyojulikana1 as required

Zana zinazohitajika:

Mkasi wa batiMkasi wa bati
Koleo la Mdomo BapaKoleo la Mdomo Bapa
Vipimo visivyojulikanaVipimo visivyojulikana
3

Make the sleeve, plate and cover

Turn a threaded sleeve and cut its thread. Spin its lower end over onto a metal plate with tangs. Cut a cover of insulating sheet with ears that reach over the bosses and a hole in the middle to guide the rod.

Vifaa kwa hatua hii:

Metali isiyojulikanaMetali isiyojulikana1 as required
Kihami kisichojulikanaKihami kisichojulikana1 as required

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Seti ya zana za lathe (HSS)Seti ya zana za lathe (HSS)
Mpini wa kukata nyuzi za njeMpini wa kukata nyuzi za nje
Mkasi wa batiMkasi wa bati
Kalipa ya VernierKalipa ya Vernier
Vipimo visivyojulikanaVipimo visivyojulikana
4

Make the push button

Make a drawn metal tube closed at the top, and a rod with a head. Put a small coil spring in the top of the tube, then the rod's head. Wedge a washer into the tube under the head. Leave clearance so the rod can swivel a little. Turn the rod's lower end down to a smaller diameter. Unknown: the metal.

Vifaa kwa hatua hii:

Metali isiyojulikanaMetali isiyojulikana1 as required
Seti ya springi za kubanaSeti ya springi za kubana1 spring

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Seti ya zana za lathe (HSS)Seti ya zana za lathe (HSS)
Kalipa ya VernierKalipa ya Vernier
Vipimo visivyojulikanaVipimo visivyojulikana
5

Assemble

Set the terminals in their recesses and the contacts in their grooves. Slide the button into the sleeve, with a coil spring round the rod between the cover and the wedged washer. Pass the rod's end through the cover's hole. Put on it a loose insulating washer with a metal rim round its edge. Hammer the rod's end over into a flange. Lay the cover on the housing, so its ears clamp the terminals, and bend the plate's tangs over the bead.

Vifaa kwa hatua hii:

Kihami kisichojulikanaKihami kisichojulikana1 as required
Metali isiyojulikanaMetali isiyojulikana1 as required
Seti ya springi za kubanaSeti ya springi za kubana1 spring

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Nyundo yenye kichwa cha duaraNyundo yenye kichwa cha duara
Koleo la Mdomo BapaKoleo la Mdomo Bapa
Miwani ya usalamaMiwani ya usalama
6

Mount and wire it

Put the sleeve through a hole in the panel and clamp the panel between two nuts on the thread. Solder the bared wire ends to the two lugs.

Vifaa kwa hatua hii:

Nati ya pembe sitaNati ya pembe sita2 pcs
Waya wa LehemuWaya wa Lehemu1 as required

Zana zinazohitajika:

Chuma cha kulehemiaChuma cha kulehemia
Koleo la Mdomo BapaKoleo la Mdomo Bapa
7

Check it

At rest, the rim sits against the underside of the cover and the circuit is open. Pressed, the rim meets the stepped ends of both contacts and closes it. The checking is ours: the meter reads open, then closed while pressed.

Zana zinazohitajika:

Kipima-umeme cha aina nyingiKipima-umeme cha aina nyingi

Vifaa

5

Zana Zinazohitajika

13

Mchoro huu unatengeneza

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