US100549A - Improvement in liqhtning-rods - Google Patents

Improvement in liqhtning-rods Download PDF

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US100549A
US100549A US100549DA US100549A US 100549 A US100549 A US 100549A US 100549D A US100549D A US 100549DA US 100549 A US100549 A US 100549A
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rod
rods
sections
improvement
liqhtning
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/186—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section using a body comprising a plurality of cable-accommodating recesses or bores

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  • Figure 1 is a view of a part of two adjacent sections of my improved lightning-rod.
  • Figure 2 is aliorizontal section of the rod.
  • Figure 3 shows the manner of forming the strips before passing them through the forming machine.
  • the several sections A of which the rod is composed are made up of two or more thicknesses of thin sheet metal cut in strips of two or three inches in width, laid together, and first being folded in a U- tbrm, as shown in fig. 3, are then passed through a suitable machine on a rod or.mandrel, which forms them into a tube, with flanges B B on opposite sides, as shown in fig. .2.
  • the spiral form is given to the flanges by twisting 'the sections on the mandrel before withdrawing it.
  • the object of making the rod of several thicknesses of sheet metal is to increase the conducting property of the rod by increasing. the surface of metal, the conducting property being in proportion to the surface, which, with two thicknesses, is double that of one thickness.
  • the receiving property of the rod is largely increased by increasing the number of raw edges of the sheet metal along the rod.
  • the metal may be made thinner, but it will at the same time stitfen the rod without adding materially to its weight or cost.
  • all the upper part of the rod above the ground may be made of suitably-plated sheet-iron or other suitable metal, and the part entering the ground of copper or other good conducting, non-oxidizing, durable material, thereby making a cheap and durable lightning-mmductor.
  • the upper part may be of two or more thicknesses, while the portion underground may be single, as this is generally in moist earth and does not require the increased surface.
  • Theinside flanged tube is made shorter at each end than the outside one, and the sections are pit together similar to the sections of a stove-pipe, the upper end of one section entering the lower end of the section above it, so that the lower end of the inside tube will rest upon the top of the outside tube below, thus forming a smooth close joint, and avoiding the tendency of the sections to slip into each other by their weight when the rod is erected.
  • I claim as my invention- The double tubular sheet-metal lightning-conductor with spiral flanges, constructed in sections and joined together in the manner substantially as and for the purpose set forth.

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  • Elimination Of Static Electricity (AREA)

Description

D. MUNSON.
Lightning Rod.
No. 100.549. Patented March 8 1870.
fiiinitml fitms DAVID MUNSON, OF INDIANAPOLIS, INDIANA.
Letters Patent No. 100,549, dated March 8, 1870.
IMPROVEMENT IN LIGHTNING-RODS.
The Schedule referred to in the Letters Patent and making part of the same.
1, DAVID Muxsos, of Indianapolis, in the county of Marion, and State of Indiana, have invented certain Improvementsin Lightning-Rods, of which the following is a specification.
Nature and Objects of the Invention.
Description of the i-lccompanying Drawings.
Figure 1 is a view of a part of two adjacent sections of my improved lightning-rod.
Figure 2 is aliorizontal section of the rod.
Figure 3 shows the manner of forming the strips before passing them through the forming machine.
Similar letters of reference indicate the. same parts in the several figures.
The several sections A of which the rod is composed are made up of two or more thicknesses of thin sheet metal cut in strips of two or three inches in width, laid together, and first being folded in a U- tbrm, as shown in fig. 3, are then passed through a suitable machine on a rod or.mandrel, which forms them into a tube, with flanges B B on opposite sides, as shown in fig. .2.
The spiral form is given to the flanges by twisting 'the sections on the mandrel before withdrawing it.
The object of making the rod of several thicknesses of sheet metal is to increase the conducting property of the rod by increasing. the surface of metal, the conducting property being in proportion to the surface, which, with two thicknesses, is double that of one thickness.
Furthermore, the receiving property of the rod is largely increased by increasing the number of raw edges of the sheet metal along the rod.
By making the 1. .l of two or more thicknesses the metal may be made thinner, but it will at the same time stitfen the rod without adding materially to its weight or cost.
If desired, all the upper part of the rod above the ground may be made of suitably-plated sheet-iron or other suitable metal, and the part entering the ground of copper or other good conducting, non-oxidizing, durable material, thereby making a cheap and durable lightning-mmductor.
The upper part may be of two or more thicknesses, while the portion underground may be single, as this is generally in moist earth and does not require the increased surface.
Theinside flanged tube is made shorter at each end than the outside one, and the sections are pit together similar to the sections of a stove-pipe, the upper end of one section entering the lower end of the section above it, so that the lower end of the inside tube will rest upon the top of the outside tube below, thus forming a smooth close joint, and avoiding the tendency of the sections to slip into each other by their weight when the rod is erected.
- The sections are secured together by a wire or narrow strip of the sheet metal passed through holes in the open tlange B at the joining.
Claim.
I claim as my invention- The double tubular sheet-metal lightning-conductor with spiral flanges, constructed in sections and joined together in the manner substantially as and for the purpose set forth.
DAVID MUNSON. Witnesses:
0. 1. MAYrinw, L). W. Kxmninn.
US100549D Improvement in liqhtning-rods Expired - Lifetime US100549A (en)

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