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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 · Public domain
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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.
Osezingeni eliphezulu
About 4 days

Imiyalelo

1

Pedal, link and travel

Ilayisha incwadi ye-Jupyter…
2

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."
3

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.

Izinto zokwakha zalesi sinyathelo:

I-angle iron yensimbi ethambileI-angle iron yensimbi ethambile6 izicucu
Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile1 ucezu
Iqoqo lamabhawoti anezinhlangothi eziyisithuphaIqoqo lamabhawoti anezinhlangothi eziyisithupha40 izicucu
Inathi Yezinhlangothi EziyisithuphaInathi Yezinhlangothi Eziyisithupha40 izicucu
Iwasha EliyisicabaIwasha Eliyisicaba40 izicucu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
I-angle grinderI-angle grinder
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isibhoboza SesikhungoIsibhoboza Sesikhungo
Isikweya EsihlanganisiweIsikweya Esihlanganisiwe
Ithephu LokulinganisaIthephu Lokulinganisa
Isipanela esilungisekayoIsipanela esilungisekayo
Izibuko zokuphephaIzibuko zokuphepha
4

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.

Izinto zokwakha zalesi sinyathelo:

Ipayipi eliyindilinga lensimbi emneneIpayipi eliyindilinga lensimbi emnene2 izicucu
Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile1 ucezu
Coil SpringCoil Spring4 izicucu
Iqoqo lamabhawoti anezinhlangothi eziyisithuphaIqoqo lamabhawoti anezinhlangothi eziyisithupha8 izicucu
Inathi Yezinhlangothi EziyisithuphaInathi Yezinhlangothi Eziyisithupha8 izicucu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
I-angle grinderI-angle grinder
Iqoqo LamafayelaIqoqo Lamafayela
Isibambo SebhentshiIsibambo Sebhentshi
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isipanela esilungisekayoIsipanela esilungisekayo
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
Izibuko zokuphephaIzibuko zokuphepha
5

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.

Izinto zokwakha zalesi sinyathelo:

Ishidi lensimbi ethambileIshidi lensimbi ethambile1 ucezu
Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile1 ucezu
I-Bearing YamabholaI-Bearing Yamabhola8 izicucu
Iqoqo lamabhawoti anezinhlangothi eziyisithuphaIqoqo lamabhawoti anezinhlangothi eziyisithupha16 izicucu
Inati Yokukhiya EnenayiloniInati Yokukhiya Enenayiloni8 izicucu
Iwasha EliyisicabaIwasha Eliyisicaba16 izicucu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
I-angle grinderI-angle grinder
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Iqoqo LamafayelaIqoqo Lamafayela
Isibambo SebhentshiIsibambo Sebhentshi
Isipanela esilungisekayoIsipanela esilungisekayo
6

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.

Izinto zokwakha zalesi sinyathelo:

Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile2 izicucu
Induku eyindilinga yensimbi ethambileInduku eyindilinga yensimbi ethambile1 ucezu
Insimbi esontekile yokudonsaInsimbi esontekile yokudonsa1 ucezu
Iqoqo lamabhawoti anezinhlangothi eziyisithuphaIqoqo lamabhawoti anezinhlangothi eziyisithupha4 izicucu
Inati Yokukhiya EnenayiloniInati Yokukhiya Enenayiloni4 izicucu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Ibhola ElimileIbhola Elimile
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isibambo SebhentshiIsibambo Sebhentshi
Isipanela esilungisekayoIsipanela esilungisekayo
7

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.

Izinto zokwakha zalesi sinyathelo:

Isaha eyindilingaIsaha eyindilinga1 ucezu
Iqoqo lamabhawoti anezinhlangothi eziyisithuphaIqoqo lamabhawoti anezinhlangothi eziyisithupha4 izicucu
Inathi yamaphikoInathi yamaphiko4 izicucu
Ishidi le-plywoodIshidi le-plywood1 ucezu
I-angle iron yensimbi ethambileI-angle iron yensimbi ethambile1 ucezu
Ihinji lomnyangoIhinji lomnyango2 izicucu
Ingwegwe nesoIngwegwe neso1 ucezu
Ibha Eyisicaba Yensimbi EthambileIbha Eyisicaba Yensimbi Ethambile1 ucezu
Izikulufu zokhuniIzikulufu zokhuni16 izicucu

Amathuluzi adingekayo:

Isaha Le-jigsawIsaha Le-jigsaw
Ibhola ElingenantamboIbhola Elingenantambo
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isaha SensimbiIsaha Sensimbi
Isipanela esilungisekayoIsipanela esilungisekayo
Isikweya EsihlanganisiweIsikweya Esihlanganisiwe
8

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.

Amathuluzi adingekayo:

Izibuko zokuphephaIzibuko zokuphepha
Isivikelo sokuzwa (izivalo zezindlebe, SNR 30 dB)Isivikelo sokuzwa (izivalo zezindlebe, SNR 30 dB)
9

Troubleshooting

Tube-track saw table troubleshooting.

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10

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.

Izinto

18

Amathuluzi Adingekayo

15

Le blueprint yenza

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Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Portable Bench Saw: A Lift-Out Power Unit on Trunnions, Its Motor on Spring Bars, Under a Tilting Platform (Henkel, 1928)

Portable Bench Saw: A Lift-Out Power Unit on Trunnions, Its Motor on Spring Bars, Under a Tilting Platform (Henkel, 1928)

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Umsebenzi Wokhuni

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Twin-Saw Table: A Rip Saw and a Crosscut Saw at Opposite Corners, One Motor, Each Depth Set by Tilting the Top (Gottschalk, 1926)

Twin-Saw Table: A Rip Saw and a Crosscut Saw at Opposite Corners, One Motor, Each Depth Set by Tilting the Top (Gottschalk, 1926)

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Umsebenzi Wokhuni

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