US1688138A - Artificial plank - Google Patents

Artificial plank Download PDF

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Publication number
US1688138A
US1688138A US1688138DA US1688138A US 1688138 A US1688138 A US 1688138A US 1688138D A US1688138D A US 1688138DA US 1688138 A US1688138 A US 1688138A
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Prior art keywords
plank
planks
artificial
gravel
quartz
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B11/00—Layered products comprising a layer of bituminous or tarry substances
    • B32B11/02—Layered products comprising a layer of bituminous or tarry substances with fibres or particles being present as additives in the layer

Definitions

  • the invention adapted primarily highways.
  • the object of the invention is to provide a plank which may be ma de and laid at a minimum of cost and which will form a highly efficient crossing material of long life.
  • the invention' consists in a Vplank formed ot selected materials in such manner that each plankfts into and supports another.
  • USB bitumen and 4in forming the plank I mix together 16 to 25% of silica dust or limestone dust and 54 to 71% of a graded sand, gravel, stone or quartz and 5 to 1Q% of powdered steel or to a temperature of not less than 325 F enheit and while 8 to 11F/fl of the bitumen,
  • a mold a suitable reinforcing member 1s 1nserted into the mass and a pressure of proximatcly 1500 pounds then applied to compress it to assume the shape of It is desirable that the a specific gravity of noty the mold.
  • silica or limestone shall be not larger than such as will pass through a 200 mesh screen and the gravel, stone or quartz should be of such size as to composition after compression.
  • the plank is also fire proof.
  • Figure 1 is a perspective Fig.2 a plan longitudinal 2; Figa Serial No. 815,641.
  • the reinforcement comprises a rod 6 from'the op- ⁇ posite sides of which project the lugs 7 -This reinforcement extends substantially from end to end of the plank and the lugs thereof project toward the opposite' sides of the plank preferably at an angle to the longitudinal axis of the rod.
  • the reinforcement therefore reinforces the central portion of the plank and causes the same to have a vmaximum of strengthand rigidit
  • the ribs on one plank fit into t e grooves of other planks so that when a number of these planks arelaid ata railway crossing they are interlocked and will remain in position. Their weight is sufiicient to hold them in place but they may be secured in place in any suitable manner when it is'desirable to do so.
  • the side ribs on the planks adjacent one rail 8 of the track may project under the tread 'of the rail and thereby further lock the planks inl place and this without interfering with the travel of the Vehicle wheels on the rail.
  • the planks adjacent the opposite rails 9 of the track could be made with ribs 5f* on their opposite sides so t the planks may be interlocked with their neighbors and with the rails.
  • the plank may be used for various purposes, hence it is not limited in its use at grade crossings.
  • the interlocking elements may also be of various forms, trated beingl one such only.
  • a plank composed of a mixture of 8 to 11% of bitumen, 16 to 25% of stone dust, 54 to 71% of inely divided gravel and 5 to 10% of powdered iron.

Description

@am ai? E928. LSgBS W. DROEGE ARTIFICIAL PLANK Filed July 25, 1925 INI ENTOR.
W ,Droege @am m. M@
Patented Oct. 16, 1928.
UNITED STATES PATENT oie-Fica.
WILLIAM n. morera, 0
F FORT WAYNE, INDIANA.
ARTIFICIAL YLANK.
Application mea ruiy 28, 1925.
The invention adapted primarily highways.
relates to artificial planks for railroad crossings at The object of the invention is to provide a plank which may be ma de and laid at a minimum of cost and which will form a highly efficient crossing material of long life.
The invention' consists in a Vplank formed ot selected materials in such manner that each plankfts into and supports another.
I have found that a plank formed of bltucast e or
fated USB bitumen and 4in forming the plank I mix together 16 to 25% of silica dust or limestone dust and 54 to 71% of a graded sand, gravel, stone or quartz and 5 to 1Q% of powdered steel or to a temperature of not less than 325 F enheit and while 8 to 11F/fl of the bitumen,
iron and heat the mixture ahrthe mixture 1s hot I insert thoroughly mixing it with the aggregate to coat each particle thereof. The mixture is then inserted.
into
a mold, a suitable reinforcing member 1s 1nserted into the mass anda pressure of proximatcly 1500 pounds then applied to compress it to assume the shape of It is desirable that the a specific gravity of noty the mold.
per square inch 1s the mass and cause bitumen shall have less than 1.02;
that the silica or limestone shall be not larger than such as will pass through a 200 mesh screen and the gravel, stone or quartz should be of such size as to composition after compression.
'lhe milverized steel or iron lessens possibility of the liner materials loosening bei wcen the grains of silica, or limestone form an almost voidless the dust
or the particles of gravel, stoneor quartz, and it materially increases the resistance of the plank to trailic and shock.
When the compressed mass is 'from the mold and has cooled it has the f of the mold and when laid'at a grade eros removed a surface is presented which resists wear by the traiic. No spiking of the sary and it is easy In the' drawings View of the finished view of the plank; cross-section on line a transverse cross-section on plank to to layuand take up.
plank Fig, 3 a 3-3 of Fig.
line
The plank is also fire proof.
the' ties is neces- Figure 1 is a perspective Fig.2 a plan longitudinal 2; Figa Serial No. 815,641.
is provided with an end rib 2 and a groove 3 at its opposite end for interlocking endwise with other similar planks. A r1b t is formed on one side of the plank and a groove 5 is formed in the opposite side. The reinforcement comprises a rod 6 from'the op-` posite sides of which project the lugs 7 -This reinforcement extends substantially from end to end of the plank and the lugs thereof project toward the opposite' sides of the plank preferably at an angle to the longitudinal axis of the rod. The reinforcement therefore reinforces the central portion of the plank and causes the same to have a vmaximum of strengthand rigidit The ribs on one plank fit into t e grooves of other planks so that when a number of these planks arelaid ata railway crossing they are interlocked and will remain in position. Their weight is sufiicient to hold them in place but they may be secured in place in any suitable manner when it is'desirable to do so. The side ribs on the planks adjacent one rail 8 of the track may project under the tread 'of the rail and thereby further lock the planks inl place and this without interfering with the travel of the Vehicle wheels on the rail., The planks adjacent the opposite rails 9 of the track could be made with ribs 5f* on their opposite sides so t the planks may be interlocked with their neighbors and with the rails.
The plank may be used for various purposes, hence it is not limited in its use at grade crossings. The interlocking elements may also be of various forms, trated beingl one such only.
In the claim I shall use the term gravel intending thereby to include sand, stone and quartz, since finely divided gravel is in reality sand.
What I claim is:
A plank composed of a mixture of 8 to 11% of bitumen, 16 to 25% of stone dust, 54 to 71% of inely divided gravel and 5 to 10% of powdered iron.
In witness whereof `I have hereunto setmy hand this 21st day of July, 1925.
hatl
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