US688932A - Process of preserving wood. - Google Patents

Process of preserving wood. Download PDF

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Publication number
US688932A
US688932A US3855000A US1900038550A US688932A US 688932 A US688932 A US 688932A US 3855000 A US3855000 A US 3855000A US 1900038550 A US1900038550 A US 1900038550A US 688932 A US688932 A US 688932A
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United States
Prior art keywords
wood
solution
chlorid
tannin
zinc
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Expired - Lifetime
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US3855000A
Inventor
Octave Chanute
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Individual
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Priority to US3855000A priority Critical patent/US688932A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/001—Heating

Definitions

  • This invention relates to the preservation of wood; and its object is to facilitate the injection into the wood of the preservatives employed and insure the thorough impregnation of the wood with them.
  • the invention consists in the process hereinafter set forth whereby solutions of chlorid of zinc, tannin, and glue are injected in the order named, the wood being subjected to a vacuum after the first and second injections in order to remove a portion of the preceding solution to make room for the succeeding
  • solutions of chlorid of zinc, tannin, and glue are injected in the order named, the wood being subjected to a vacuum after the first and second injections in order to remove a portion of the preceding solution to make room for the succeeding
  • the three substances employed are old and well known in the art; but they have neverbefore been used, to my knowledge, in the order in which I now employ them.
  • gelatin or glue has been mixed with the solution of chlorid of zinc and the mixture forced into the wood.
  • the tannin solution was afterward forced in to convert the gelatin into a leathero-id.
  • the process in detail is as follows: The timher to be treated should be partially seasoned by drying or steaming, as such wood is more Serial No. 88,550. (No specimens.)
  • the timber is then immersed in the chlorid of zinc and subjected to a heavy fluid-pressure-.say about one hundred pounds to the square inch. At first the timber readily absorbs the chlorid, the process being maintained constant by means of a pump. When at length the timber refuses to absorb any more of the solution, the surplus is drawn off and a second vacuum is created in the chamber containing the timber.

Description

UNITED OCTAVE OHANUTE, OF CHICAGO, ILLINOIS.
PROCESS OF PRESERVING WOOD.
SPECIFICATION forming part Of Letters Patent No. 688,932, dated December 17, 11901.
Application filed December 3, 1900- To aZZ whom it may concern:
Be it known that I, OOTAVE OHANUTE, a citizen of the United States, residing at Ohioago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Processes of Preserving WVood and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in... the art to which it appertains to make and use the, same.
This invention relates to the preservation of wood; and its object is to facilitate the injection into the wood of the preservatives employed and insure the thorough impregnation of the wood with them.
The invention consists in the process hereinafter set forth whereby solutions of chlorid of zinc, tannin, and glue are injected in the order named, the wood being subjected to a vacuum after the first and second injections in order to remove a portion of the preceding solution to make room for the succeeding The three substances employed are old and well known in the art; but they have neverbefore been used, to my knowledge, in the order in which I now employ them.
Heretofore the gelatin or glue has been mixed with the solution of chlorid of zinc and the mixture forced into the wood. The tannin solution was afterward forced in to convert the gelatin into a leathero-id.
I have found in practice that the addition of gelatin to the chlorid-of-zinc solution made the latter less fiuid and rather viscid and that the solution therefore did not penetrate as far into the wood nor enter it in proper quantities. By changing the order and injecting the tannin solution next after the chlorid of zinc and the gelatin last I find that the results are much more satisfactory.
The process in detail is as follows: The timher to be treated should be partially seasoned by drying or steaming, as such wood is more Serial No. 88,550. (No specimens.)
easily heated to a temperature suificient to drive out the sap than is the case with wood freshly cut. The seasoned wood is then subjected to heat in a vacuum to cause the removal of a portion of the sap. The timber is then immersed in the chlorid of zinc and subjected to a heavy fluid-pressure-.say about one hundred pounds to the square inch. At first the timber readily absorbs the chlorid, the process being maintained constant by means of a pump. When at length the timber refuses to absorb any more of the solution, the surplus is drawn off and a second vacuum is created in the chamber containing the timber. I prefer to use a vacuum of about one-half an atmosphere, and it results in some of the solution being expelled from the wood by the air occluded and compressed in the sap-cells.- The tannin solution is then forced into the wood until it has penetrated as far as it will go, when the surplus is drawn off, and the vacuum is again established to expel some of the tannin. Finally the glue is forced in, combining with the tannin in the usual manner.
What I claim as new, and desire to secure by Letters Patent of the United States, is-
l. The process of preserving wood, which consists in subjecting it first to a solution of chlorid of zinc, then to a solution of tannin, and finally to a solution of gelatin.
2. The process of preserving wood, which consists in subjecting it first to a solution of chlorid of zinc under pressure, then to a vacuum, then to a solution of tannin under pressure, then to a vacuum, and finally to a solution of gelatin.
In testimony whereof I affix my signature in presence of two witnesses.
OCTAVE OHANUTE.
Witnesses:
H. KLOCKENBRINK, N. A. EMMERTZ.
US3855000A 1900-12-03 1900-12-03 Process of preserving wood. Expired - Lifetime US688932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3855000A US688932A (en) 1900-12-03 1900-12-03 Process of preserving wood.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3855000A US688932A (en) 1900-12-03 1900-12-03 Process of preserving wood.

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US688932A true US688932A (en) 1901-12-17

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US3855000A Expired - Lifetime US688932A (en) 1900-12-03 1900-12-03 Process of preserving wood.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917408A (en) * 1958-04-01 1959-12-15 Koppers Co Inc Method of imparting flame retardance to wood

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917408A (en) * 1958-04-01 1959-12-15 Koppers Co Inc Method of imparting flame retardance to wood

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