US126289A - Improvement in electrical linings for safes, vaults - Google Patents
Improvement in electrical linings for safes, vaults Download PDFInfo
- Publication number
- US126289A US126289A US126289DA US126289A US 126289 A US126289 A US 126289A US 126289D A US126289D A US 126289DA US 126289 A US126289 A US 126289A
- Authority
- US
- United States
- Prior art keywords
- safes
- electrical
- vaults
- linings
- improvement
- 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
- 239000011888 foil Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 102000001324 CD59 Antigens Human genes 0.000 description 1
- 108010055167 CD59 Antigens Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0431—Wall trunking
Definitions
- Wiiinii/i 3i GUERNSEY Wiiinii/i 3i GUERNSEY.
- the purpose of this invention is to enable a screen or lining of electrical conductors to be so made that attempts to penetrate it to any damaging extent must necessarily result in the breaking of the electrical circuit, or in a cross-connecting ot' two circuits to the same effect as it' either or both were broken.
- I effeet this by using for such conductors stripes of metal foil, superimposed upon wood or other suitable material by (preferably) such means as are used by painters and gilders in ornamentation. As these stripes can be reached only by piercing the Wood or base upon which they are made, it becomes practically impossible to tamper with them, as could be done with wires or with sheets of foil, as heretofore used.
- Figure l is a view of the interior of one-halt of a screen (or cabinet) designed for the protection of safes.
- Fig. 2 is-a plan view ot' same arrangement showing saie in its place.
- the stripes of metal foil (t a a., Ste., are here shown as being mere parallel bands; but their shape, width, or proximity are mere matters of detail to be determined by judgment and experience. So, also, a stripe may be made, instead ot' as here shown, in a continuous length or coil surrounding the whole inside of the cabinet,77 and returning again and again upon itself, having no or but few joinings, and only two free ends, or may be arranged in other manners; but in the iigure the stripes are shown.
- each section embracing some component part ot' the cabinet, as a side or a top, and each end ot each stripe terminating in a short length of copper wire, which is embedded in or connected with the stripe by a broad-headed screw or nail, except that some of the said stripes are connected to springs or metallic contact pieces b b b b, placed in the joinings of such sections, so that when the cabinet is together it cannot be taken apart without breaking a circuit, which might otherwise be closed.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Burglar Alarm Systems (AREA)
- Structure Of Printed Boards (AREA)
Description
Wiiinii/i 3i GUERNSEY.
inigninvsmen. in Eiecficai Lining for Sa" s, iv/nuits, ic.
Patented Aprii 30, i872.
Figi.
WiTN ESSES. KQ/Muni@ '.TNTTED STATES PATENT OFFICE.
WILLIAM B. GUERNSEY, OF JERSEY CITY, NEW JERSEY. l
Specification forming part of Letters Patent No. 126,289, dated April 30, 1872.
Specilication ot' an Improved Electrical Protectin g Screen or Lining for Safes, Vaults, Sie., invented by WILLIAM B. GUERNSEY, of Jersey City, in the county of Hudson, State of New Jersey.
The purpose of this invention is to enable a screen or lining of electrical conductors to be so made that attempts to penetrate it to any damaging extent must necessarily result in the breaking of the electrical circuit, or in a cross-connecting ot' two circuits to the same effect as it' either or both were broken. I effeet this by using for such conductors stripes of metal foil, superimposed upon wood or other suitable material by (preferably) such means as are used by painters and gilders in ornamentation. As these stripes can be reached only by piercing the Wood or base upon which they are made, it becomes practically impossible to tamper with them, as could be done with wires or with sheets of foil, as heretofore used. They will be surely broken by any attempt to make a metallic connection upon them from the outside. By tirst placing a coating of some hard but brittle material like plaster, upon the wood, and then making the stripe upon such coating, the difiiculty ot' tampering with such conductors is greatly increased.
Figure l is a view of the interior of one-halt of a screen (or cabinet) designed for the protection of safes. Fig. 2 is-a plan view ot' same arrangement showing saie in its place.
The stripes of metal foil (t a a., Ste., are here shown as being mere parallel bands; but their shape, width, or proximity are mere matters of detail to be determined by judgment and experience. So, also, a stripe may be made, instead ot' as here shown, in a continuous length or coil surrounding the whole inside of the cabinet,77 and returning again and again upon itself, having no or but few joinings, and only two free ends, or may be arranged in other manners; but in the iigure the stripes are shown. as having been made in sections, each section embracing some component part ot' the cabinet, as a side or a top, and each end ot each stripe terminating in a short length of copper wire, which is embedded in or connected with the stripe by a broad-headed screw or nail, except that some of the said stripes are connected to springs or metallic contact pieces b b b b, placed in the joinings of such sections, so that when the cabinet is together it cannot be taken apart without breaking a circuit, which might otherwise be closed. When the cabinet is put together the foil ends ofthe wires c c c c are to be attached in either a regular or confused manner, so as to bring each stripe into the circuit or into a circuit-perhaps into one ofthe two parts of a circuit, which parts are so related to each other that the cross-connecting ot' them shall produce the same effect as the severing of them.
I do not claim the use of sheet metal or metallic ribbons in the construction of electric protecting envelopes for safes, as I am aware
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US126289A true US126289A (en) | 1872-04-30 |
Family
ID=2195714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US126289D Expired - Lifetime US126289A (en) | Improvement in electrical linings for safes, vaults |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US126289A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772674A (en) * | 1964-09-15 | 1973-11-13 | Martin Marietta Corp | Tamper resistant container |
| US3851602A (en) * | 1971-02-23 | 1974-12-03 | Gao Ges Automation Org | Safety box or the like |
-
0
- US US126289D patent/US126289A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772674A (en) * | 1964-09-15 | 1973-11-13 | Martin Marietta Corp | Tamper resistant container |
| US3851602A (en) * | 1971-02-23 | 1974-12-03 | Gao Ges Automation Org | Safety box or the like |
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