US529216A - Conduit for electric conductors - Google Patents
Conduit for electric conductors Download PDFInfo
- Publication number
- US529216A US529216A US529216DA US529216A US 529216 A US529216 A US 529216A US 529216D A US529216D A US 529216DA US 529216 A US529216 A US 529216A
- Authority
- US
- United States
- Prior art keywords
- conduit
- covering
- electric conductors
- insulating material
- tube
- 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
- 239000004020 conductor Substances 0.000 title description 12
- 239000011810 insulating material Substances 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000002184 metal Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 210000001331 Nose Anatomy 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
- H01P3/14—Hollow waveguides flexible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
Definitions
- My invention consists of an improvement in the manufacture of conduits for electric conductors such as set forth in my Patent No. I 417,688, dated December 17, 1889, the object of my present invention being to facilitate the manufacture of such a conduit especially when the same is of comparatively small diameter and of considerable length.
- This method of manufacture was comparatively slow and was limited to conduits of short length and of considerable diameter whereas my present process has been devised especially for the manufacture of conduits of small diameter and of indefinite length such as are used for carrying electric lighting and other wires in buildings.
- the conduit can be readily bent so as to turn corners or otherwise conform to the crooked course which electrical conductors frequently have to take in internal installations, the present conduit, therefore, difiering from that of the former patent in which both the inner and outer tubes were rigid.
Description
(No Model.) 1 J. TATHAM.
GON D UIT FOR ELECTRIC GONDUGTQR3.
No. 529,216. Patented Nov. 13, 1894.
WITNESSES Y IN VENfU/P B his" Aiivrneys fibm l V m ve fm .Tng uonpxs PETERS cc. moYuu'rH WASNINGYON, l2. c4
NITED STATES PATENT Enron.
JAMES TATHAM, OF PHILADELPHIA, PENNSYLVANIA.
CONDUIT F OR ELECTRIC CONDUCTORS.
SPECIFICATION forming part of Letters Patent No. 529,216, dated November 13, 1894. Application filed March 17, 1894. Serial No. 504,002. (lilo model.)
7 To all whorrt it may concern:
Be it known that I, J AMEs TATHAM, a citi zen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in the Manufacture of Conduits for Electric Conductors, of which thefollowing is a specification.
My invention consists of an improvement in the manufacture of conduits for electric conductors such as set forth in my Patent No. I 417,688, dated December 17, 1889, the object of my present invention being to facilitate the manufacture of such a conduit especially when the same is of comparatively small diameter and of considerable length.
The conduit forming the subject of my aforesaidLetters Patentconsistedof inner and outer metallictubes and an interposed layer of insulating material rigidly confined between the two tubes, the method of manufacturing the conduit being to first introduce the tube of insulating material within the outer tube and then to insert the inner tube and expand the same by hydraulic pressure. This method of manufacture was comparatively slow and was limited to conduits of short length and of considerable diameter whereas my present process has been devised especially for the manufacture of conduits of small diameter and of indefinite length such as are used for carrying electric lighting and other wires in buildings.
In the accompanying drawing the figure represents my improved conduit, partly in section.
In carrying out my invention I first make the inner tube of the conduit of lead or other ductile metal in an ordinary lead pipe press and I then proceed to apply the insulating covering to said tube, preferably by winding or braiding it upon the same, the covering being also, if desired, saturated with insulating material. The tube with its insulating covering is wound upon a reel or otherwise so disposed that it can be readily fed through the hollow core of a second lead pipe press whereby the outer tube is applied to the insulated covering of the inner tube. I prefer to use for this purpose a machine of the char- 5o acter set forth in my Patent No. 363,182, dated the enveloping of the insulating cover of the inner tube in liquid insulating material almost up to the point of its issue from the nose of the core preparatory to passing through the die of the press, and in some cases this saturation of the braided textile covering of the inner tube with said insulating material may render unnecessary any previous treatment of the covering with the insulating material, or, on the other hand, if the textile covering of the inner tube is previously saturated with insulating material, the hollow core of the second lead pipe press may not be provided with the liquid insulating material, although the saturating of the covering with insulating material in the second press is preferable, even in addition to any previous saturation of the covering.
As the inner and outer tubes of lead are flexible to a certain degree, the conduit can be readily bent so as to turn corners or otherwise conform to the crooked course which electrical conductors frequently have to take in internal installations, the present conduit, therefore, difiering from that of the former patent in which both the inner and outer tubes were rigid.
Having thus described my invention, I claim and desire to secure by Letters Patcut- 1. The mode herein described of making a flexible conduit for electric conductors, said mode consisting in first making a tube of lead or other ductile metal, then applying an insulating covering thereto, and then forming an outer tube of lead or other ductile metal around said insulating covering, substan-
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US529216A true US529216A (en) | 1894-11-13 |
Family
ID=2597998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US529216D Expired - Lifetime US529216A (en) | Conduit for electric conductors |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US529216A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2699575A (en) * | 1951-06-11 | 1955-01-18 | Gates Rubber Co | Apparatus for making rubber hose |
| US3109670A (en) * | 1960-10-17 | 1963-11-05 | Charles F Engel | Air duct installations |
| US3299417A (en) * | 1962-07-24 | 1967-01-17 | Dk Mfg Company | Flexible pressure tubes and conduits |
| US4126928A (en) * | 1977-04-18 | 1978-11-28 | Hoffco, Inc. | Method of making a shaft assembly |
| US4966202A (en) * | 1988-11-14 | 1990-10-30 | Dayco Products, Inc. | Shape retention hose construction |
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0
- US US529216D patent/US529216A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2699575A (en) * | 1951-06-11 | 1955-01-18 | Gates Rubber Co | Apparatus for making rubber hose |
| US3109670A (en) * | 1960-10-17 | 1963-11-05 | Charles F Engel | Air duct installations |
| US3299417A (en) * | 1962-07-24 | 1967-01-17 | Dk Mfg Company | Flexible pressure tubes and conduits |
| US4126928A (en) * | 1977-04-18 | 1978-11-28 | Hoffco, Inc. | Method of making a shaft assembly |
| US4966202A (en) * | 1988-11-14 | 1990-10-30 | Dayco Products, Inc. | Shape retention hose construction |
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