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UBUHANZI
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UMUCO N'AMATEKA
IMYIDAGADURO
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IBYAMBARWA
Tube-Track Pedal Saw Table: Any Portable Saw Clamped Upside Down on a Carriage Rolling Inside Slotted Tubes (Tomlinson & Bearden, 1931)
William A. Tomlinson and Howell B. Bearden of Phoenix, Arizona, received US 1,813,783, dated 7 July 1931, for a table that turns any portable power saw into a table saw. The saw is clamped upside down on a carriage, its blade through the slot of a top hinged at the rear. The carriage rolls on ball-bearing rollers inside two steel tubes slotted along their undersides. A pedal pushes it forward through the work, leaving both hands free, and a spring brings it back. With the pedal left alone it works as a fixed saw, and the saw unbolts for hand use.
The patent gives no sizes; every size here is ours.
Hejuru
About 4 days
Amabwiriza
1
1
Pedal, link and travel
Pedal, link and travel
Gupakira ikaye ya Jupyter…
2
2
Read US 1,813,783
Read US 1,813,783
"By using the pedal in the manner above set forth both hands of the operator will be free for manipulating the work, which is especially desirable when pattern work is to be sawed."
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3
Angle-iron frame
Angle-iron frame
Bolt a frame of steel angle 900 x 500 mm, 850 high: four corner legs 1, side and end bars 2, 3 halfway up and 4, 5 at the top, flat-bar diagonal braces 6 at the top corners, a cross bar 7 between the rear legs above the middle bars, and a cross bar 8 between the front legs at the bottom. Drill a vertical row of 9 mm holes 13, 25 mm apart, near the top of each leg, for the track hangers.
Ibikoresho by'iyi ntambwe:
Icyuma cy'impande cy'icyuma cyoroheje6 ibice
Umurongo ugororotse w'icyuma cyoroshye1 igice
Icyegeranyo cy'inyuzi z'impande esheshatu40 ibice
Umupira w'Impande Esheshatu40 ibice
Uruziga Rurambuye40 ibiceIbikoresho bikenewe:
Umucumita w'Ibyuma
Isaruro ry'impande
Icyuma Cyivumbura Gihagaze
Ibyuma Byinshi byo Gucukura
Igicukuzi cyo Gushyira Ikimenyetso
Ikigereranyo Gihuriweho
Umugozi wo Gupima
Isupana ihindurwa
Amadarubindi y'umutekano4
4
Slotted tube tracks
Slotted tube tracks
Cut two 900 mm lengths of 42 mm steel tube 9, 10 and cut a 10 mm slot 14 along the underside of each, stopping 20 mm short of the ends; file the slot's edges smooth. Bolt a flat-bar hanger 11 to each end of each tube and hang the tubes along the frame's sides from the legs with bolts 12 through the row of holes, at the height that suits your saw. Put a short coil spring 39 in each end of each tube as a buffer.
Ibikoresho by'iyi ntambwe:
Umuyoboro uzengurutse w'icyuma cyoroshye2 ibiceUmurongo ugororotse w'icyuma cyoroshye1 igice
Coil Spring4 ibiceIcyegeranyo cy'inyuzi z'impande esheshatu8 ibiceUmupira w'Impande Esheshatu8 ibiceIbikoresho bikenewe:
Umucumita w'IbyumaIsaruro ry'impande
Amakariso Menshi
Ifatiro ry'AmezaIcyuma Cyivumbura GihagazeIbyuma Byinshi byo GucukuraIsupana ihindurwa
Ikigereranyo cya Digitale cy'Amasentimetero 6Amadarubindi y'umutekano5
5
Carriage and rollers
Carriage and rollers
Cut the carriage 30 from 5 mm steel plate, as wide as between the tubes. At each corner bolt an upright flat-bar standard 31 that reaches up through a tube's slot, and on its top a short bar 33 across inside the tube carrying a 22 mm ball bearing 32 at each end on an M8 bolt with a lock nut. Slide the rollers into the tubes from the ends, the standards hanging down through the slots, and bolt them to the carriage.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'icyuma cyoroheje1 igiceUmurongo ugororotse w'icyuma cyoroshye1 igice
Bearing y'utubumbe8 ibiceIcyegeranyo cy'inyuzi z'impande esheshatu16 ibice
Ecrou ifunga ifite umuzingo wa nayiloni8 ibiceUruziga Rurambuye16 ibiceIbikoresho bikenewe:
Umucumita w'IbyumaIsaruro ry'impandeIcyuma Cyivumbura GihagazeIbyuma Byinshi byo GucukuraAmakariso MenshiIfatiro ry'AmezaIsupana ihindurwa6
6
Pedal and springs
Pedal and springs
Pivot a lever 21 of steel flat bar on the front bottom cross bar 8, with an arm 22 to the side carrying the pedal 20 and a brace 23 from arm to lever. Join the lever's top to the carriage's front with a flat-bar link 24. Hook a return spring 25a from the rear cross bar 7 to the lever partway up.
Ibikoresho by'iyi ntambwe:
Umurongo ugororotse w'icyuma cyoroshye2 ibice
Umurongo uziguye w'icyuma cyoroheje1 igice
Umusemburo ukururwa1 igiceIcyegeranyo cy'inyuzi z'impande esheshatu4 ibiceEcrou ifunga ifite umuzingo wa nayiloni4 ibiceIbikoresho bikenewe:
Umucumita w'IbyumaIcyuma Cyivumbura GihagazeIbyuma Byinshi byo GucukuraIfatiro ry'AmezaIsupana ihindurwa7
7
Mount the saw and the top
Mount the saw and the top
Turn the circular saw upside down on the carriage and bolt it by its base plate with bolts and wing nuts, so it lifts off for hand use; his T-bolt 34 and hook bolts 36 gripped the saw's handles, which modern saws do not suit. Make the top 42 of plywood on a steel angle frame 44, slotted along the blade's path, and hinge its rear edge to the frame so it swings up to reach the saw. Fit a catch 47 to lock it down and a folding flat-bar brace 49 to prop it up.
Ibikoresho by'iyi ntambwe:
Umusumeno uruziga1 igiceIcyegeranyo cy'inyuzi z'impande esheshatu4 ibice
Inoti y'amababa4 ibice
Urupapuro rw'ibiti byometse1 igiceIcyuma cy'impande cy'icyuma cyoroheje1 igice
Ifatanya ry'urugi2 ibice
Inzitizi n'ijisho1 igiceUmurongo ugororotse w'icyuma cyoroshye1 igice
Imisumari y'ibiti16 ibiceIbikoresho bikenewe:
Umucumita wa Jigsaw
Icyuma Cyivumbura Kidafite InsingaIbyuma Byinshi byo GucukuraUmucumita w'IbyumaIsupana ihindurwaIkigereranyo Gihuriweho8
8
Cut
Cut
Lock the top down. Set the saw's depth so the blade stands 10 mm above the board. Place the board on the top in front of the blade, start the saw and press the pedal: the carriage rolls the running blade through it while both hands hold the work. Let the pedal up and the spring returns it. For ripping, leave the carriage still and feed the board.
Ibikoresho bikenewe:
Amadarubindi y'umutekano
Ikirinda amatwi (utwuma tw'amatwi, SNR 30 dB)9
9
Troubleshooting
Troubleshooting
Tube-track saw table troubleshooting.
Flow
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10
History and honest limits
History and honest limits
**William A. Tomlinson** and **Howell B. Bearden** of Phoenix, Arizona, US 1,813,783, dated 7 July 1931, filed 5 December 1928. They claimed a top with a slot, "laterally spaced longitudinally extending tubular tracks" below it, "slotted longitudinally on their lower faces", and a saw carriage with upstanding roller-carrying hangers in the tracks, their shanks through the slots. Their saw is held by its handles; ours by its base plate. Their frame is angle iron, as ours. They give no sizes; every size here is ours.
Ibikoresho
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- 16 ibiceUmwanya
Ibikoresho bikenewe
15- Umwanya
- 1 vendor sell this, none ship to you yetUmwanya
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- 1 vendor sell this, none ship to you yetUmwanya
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- 1 vendor sell this, none ship to you yetUmwanya
- 1 vendor sell this, none ship to you yetUmwanya
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