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Hose-Clamp Saddle, Screw Housing and Worm Screw (North & Burke, 1945)
North and Burke's worm-drive hose clamp of 1945 has three small parts on the band: a U-shaped saddle welded to it, a housing that fits over the saddle as the screw's casing, held by prongs riveted through its flanges, and a screw with one continuous thread whose reduced ends sit in slots in the housing's end walls. Here they are made by hand from mild steel sheet and bar instead of being stamped; method and sizes are ours.
The picture: North and Burke's patent drawing, US 2,386,629.
Juu
1 day
Maagizo
1
1
Saddle
Saddle
From 0.8 mm mild steel sheet cut a strip as wide as the band, with two narrow tabs on each long edge for the prongs. Bend the long edges up into a U and curve the base slightly along its length to match the band.
Vifaa kwa hatua hii:
Bati la Chuma Laini1 kipandeZana zinazohitajika:
Kichora Mistari
Rula
Mkasi wa bati
Seti ya tupa
Kibano cha meza ya kazi
Nyundo yenye kichwa cha msalaba
Glavu za Kazi za Ngozi2
2
Screw housing
Screw housing
Cut a blank for the casing that fits over the saddle, with a flange along each side and an end wall at each end. Drill a hole in each flange where a prong will pass, and cut a slot down into each end wall for the screw's reduced ends. Bend it to shape.
Zana zinazohitajika:
Kichora MistariMkasi wa bati
Kekee cha mkonoSeti ya tupaKibano cha meza ya kaziNyundo yenye kichwa cha msalabaGlavu za Kazi za Ngozi3
3
Turn the worm screw
Turn the worm screw
Chuck mild steel bar and turn the screw: a head with a screwdriver slot, a shoulder, the threaded body, and a reduced end at each end that drops into the housing's slots, with shoulders that bear on the end walls.
Vifaa kwa hatua hii:
Fito ya chuma laini1 kipandeZana zinazohitajika:
Kereza ya Chuma
Chaki ya kereza yenye makucha 3
Chombo cha kukata cha lathe
Patasi ya kukata kazi
Msumeno wa chuma
Kipima-unene cha dijitali cha inchi 6
Mafuta ya kukatia
Miwani ya usalama4
4
Cut the thread
Cut the thread
Single-point cut one continuous thread along the body, its pitch matching the spacing of the band's slots, with a flat working face and a rounded back so it fills the slots.
Zana zinazohitajika:
Kereza ya ChumaChombo cha kukata cha lathe
Kipimo cha nafasi za nyuziMafuta ya kukatia5
5
Trial fit
Trial fit
Lay the screw in the saddle with its ends in the housing's slots, fit the housing over it and check the prongs pass through the flange holes and the screw turns freely without end play. The clamp blueprint then welds, rivets and assembles them.
Zana zinazohitajika:
Kipima-unene cha dijitali cha inchi 6Seti ya tupaVifaa
2- 1 kipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
Zana Zinazohitajika
17- Kishikilia Nafasi
- Kishikilia Nafasi
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- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
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