US545222A - Process of preserving timber - Google Patents
Process of preserving timber Download PDFInfo
- Publication number
- US545222A US545222A US545222DA US545222A US 545222 A US545222 A US 545222A US 545222D A US545222D A US 545222DA US 545222 A US545222 A US 545222A
- Authority
- US
- United States
- Prior art keywords
- timber
- creosote
- preserving timber
- sap
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title description 18
- 230000002335 preservative Effects 0.000 description 12
- 239000003755 preservative agent Substances 0.000 description 12
- 229960002126 Creosote Drugs 0.000 description 8
- 235000006173 Larrea tridentata Nutrition 0.000 description 8
- 240000007588 Larrea tridentata Species 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
Definitions
- Our invention relates to an improved process of treating timber of all descriptions with preservative fluids-such as, for instance, creosote-oil--or the purpose of preventing decay or deterioration.
- preservative fluids such as, for instance, creosote-oil--or the purpose of preventing decay or deterioration.
- the object of our invention is to provide a more perfect preliminary drying of the timher,- a thorough impregnation with the preservative fluid, and a less loss of the preservative fluid by evaporation, and a less amount of time necessary for the completion of the process.
- Hitherto timber has been treated in various ways. In one process it is first subjected to live steam within a closed retort; secondly, a vacuum is produced, and then the steaming and vacuum are alternately produced until. the timber is dry. The preservativeliquid is then injected under pressure.
- the timber is placed in closed chambers, and after the requisite steaming the pre servative fluid is introduced into it in the form of a vapor; but in all of these processes, however carried out, the timber is checked and cracked, so as to injure the product, the drying is ineffective, a very considerable time is necessary to complete the process, and when a vacuum is employed there is a great waste of the preservative material, which distills ofi very rapidly on account of the vacuum.
Description
UNITED STATES PATENT fiss on.
WILLIAM G. CURTIS AND JOHN D. ISAAOS, OF SAN FRANCISCO, CALIFORNIA.
PROCESS OF PRESERVlNG TIMBER.
SPECIFICATION forming part of Letters Patent No. 545,222, dated August 27, 1895. Application filed August 30, 1893. Serial No. 484 400l (No specimens) To all whom it may concern:
Be it known that we, WILLIAM G. CURTIS and JOHN D. ISAAOS, citizens of the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Processes of Preserving Timber; and we hereby declare the following to be a full, clear, and exact description of the same.
Our invention relates to an improved process of treating timber of all descriptions with preservative fluids-such as, for instance, creosote-oil--or the purpose of preventing decay or deterioration.
It consists of a series of operations, which will be more fully explained in the following specification.
The object of our invention is to provide a more perfect preliminary drying of the timher,- a thorough impregnation with the preservative fluid, and a less loss of the preservative fluid by evaporation, and a less amount of time necessary for the completion of the process. Hitherto timber has been treated in various ways. In one process it is first subjected to live steam within a closed retort; secondly, a vacuum is produced, and then the steaming and vacuum are alternately produced until. the timber is dry. The preservativeliquid is then injected under pressure. In other processes the timber is placed in closed chambers, and after the requisite steaming the pre servative fluid is introduced into it in the form of a vapor; but in all of these processes, however carried out, the timber is checked and cracked, so as to injure the product, the drying is ineffective, a very considerable time is necessary to complete the process, and when a vacuum is employed there is a great waste of the preservative material, which distills ofi very rapidly on account of the vacuum.
In ourinvention we place the timber in retorts with vents left open to the air, and then introduce the creosote-oil in sufficient quancities to submerge the timber in the same. The oil is heated above the boiling-point of the sap without any vacuum or reduction of pressure being employed. This expels all the sap from the timber, while the heat of the creosote-oil is not sufficient to cause it to rapidly evaporate. The vents are then closed, and the creosote or preservative liquid is thus forced under pressure into the pores of the wood to the desired extent.
Having thus described our invention,what 5 5 we claim as new, and desire to secure by Letters Patent, is-
The improved process herein described of impregnating timberswithpreservativefluids, consisting in placing the timber in retorts, with vents left open to the air, then introducing creosote in sufficient quantities to submerge the timber in the same, then heating the timber and creosote to a temperature above the boiling point of the sap, at ordinary atmospheric pressure, whereby the sap is expelled from the timber, then closing the vents of the retorts and by the pressure thus caused by the continued heating, forcing the creosote into the pores of the timber to take the place of the evaporated sap, substantially as herein described. 4
In Witness whereof we have hereunto set our hands.
WILLIAM G. CURTIS. JOHN D. ISAAOS.
Witnesses:
S. H. NOURSE, J. A. BAYLEss.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US545222A true US545222A (en) | 1895-08-27 |
Family
ID=2613967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US545222D Expired - Lifetime US545222A (en) | Process of preserving timber |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US545222A (en) |
-
0
- US US545222D patent/US545222A/en not_active Expired - Lifetime
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