Ukusebenzisana
UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Jigsaw: Motor-Rocked C-Frame on a Leaf Spring (Heese, US 2,692,622, 1954)
A small electric jig saw for curved cuts. A long U-shaped frame holds a fine blade stretched between its two arms. The frame's back end hangs on an L-shaped leaf spring, and an eccentric on a motor shaft rocks its lower arm up and down, so the blade saws through a slot in the table while the spring flexes. A wing nut tensions the blade; sawdust falls into a box below.
Result: a compact motor-driven jig (scroll) saw.
Source: G. O. Heese, US 2,692,622 (1954). Unknown: materials, sizes, the motor and the stroke. Picture: the patent drawing.
Ophakathi
Unknown
Imiyalelo
1
1
Build the base and table
Build the base and table
Make a long flat base, wider at the front. Fasten a long upright support along it, its back end a separate upright strip. Across the wide front stand two walls with matching upright guide slots, carrying a level table that overhangs to the front with a slot for the blade. Under the overhang set a removable open box for sawdust. Not given: materials, sizes.
Izinto zokwakha zalesi sinyathelo:
Okokwakha okungaziwa1 base, support, walls, table, box
Iqoqo lamabhawoti anezinhlangothi eziyisithupha1 fastenersAmathuluzi adingekayo:
Isaha Sensimbi
Ibhola lesandla
Izilinganiso ezingaziwa2
2
Make the C-frame and spring hinge
Make the C-frame and spring hinge
Make a U-shaped blade frame: an upper arm, a lower arm, and a back piece made in one with the lower arm and bolted to the upper. Fix the upright part of an L-shaped leaf spring to the support's back strip; its flat part goes into a slot in the frame's back piece and is held by the same bolt. The frame can now swing up and down on the spring, its lower arm running in the walls' guide slots under the table.
Izinto zokwakha zalesi sinyathelo:
Insimbi engaziwa1 frame arms and back
I-spring yamaqweqwe1 ucezuIqoqo lamabhawoti anezinhlangothi eziyisithupha1 ucezu
Inathi Yezinhlangothi Eziyisithupha1 ucezuAmathuluzi adingekayo:
Isipanela esilungisekayo3
3
Fit the motor and eccentric
Fit the motor and eccentric
Fix an electric motor on the wide front of the base with its shaft running across under the frame's lower arm. Put two bolts down through the lower arm, one each side of the shaft; on them hang a lower strip resting on nuts and an upper strip under the arm, with a coil spring on each bolt pushing the strips apart. Fix an eccentric on the motor shaft between the two strips: as it turns it rocks the frame. Not given: the motor, the throw.
Izinto zokwakha zalesi sinyathelo:
Imoto kagesi1 ucezu
Ibhushi engagxili maphakathi1 eccentricInsimbi engaziwa1 two stripsIqoqo lamabhawoti anezinhlangothi eziyisithupha1 two boltsInathi Yezinhlangothi Eziyisithupha2 izicucu
Isethi Yezinsimbi Ezisontekile Zokucindezela1 two coil springsAmathuluzi adingekayo:
Isipanela esilungisekayo4
4
Fit the blade clamps and use it
Fit the blade clamps and use it
On the lower arm fix a strip with a forked end that hooks under the blade's lower pin. On the upper arm fit a bracket with a cross pin; an arm rocks on it, its forked front end over the blade's upper pin, its back end pulled down by a bolt with a wing nut. Add forked guide strips above and below the table. To fit a blade, loosen the wing nut, hook both pins and tighten the nut to stretch the blade straight. Switch on and feed the work across the table. Ours: a pinned coping-saw blade.
Izinto zokwakha zalesi sinyathelo:
Insimbi engaziwa1 clamp strips, bracket, arm, guides
Inathi yamaphiko1 ucezuIqoqo lamabhawoti anezinhlangothi eziyisithupha1 ucezu
Insingo yesaha se-coping1 pinned bladeAmathuluzi adingekayo:
Isipanela esilungisekayoIzinto
10- 1 base, support, walls, table, boxIsibambeli
- Isibambeli
- 1 clamp strips, bracket, arm, guidesIsibambeli
- 1 ucezuIsibambeli
- 3 izicucuIsibambeli
- 1 ucezuIsibambeli
- 1 eccentricIsibambeli
- 1 two coil springsIsibambeli
- 1 ucezuIsibambeli
- 1 pinned bladeIsibambeli
Amathuluzi Adingekayo
4- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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