US207476A - Improvement in gratings - Google Patents
Improvement in gratings Download PDFInfo
- Publication number
- US207476A US207476A US207476DA US207476A US 207476 A US207476 A US 207476A US 207476D A US207476D A US 207476DA US 207476 A US207476 A US 207476A
- Authority
- US
- United States
- Prior art keywords
- gratings
- bars
- rods
- grating
- horizontal
- 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
- 229910000754 Wrought iron Inorganic materials 0.000 description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 8
- 229910001208 Crucible steel Inorganic materials 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 101700043531 BEA1 Proteins 0.000 description 2
- 102000001324 CD59 Antigens Human genes 0.000 description 2
- 108010055167 CD59 Antigens Proteins 0.000 description 2
- 210000003141 Lower Extremity Anatomy 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000001419 dependent Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G27/00—Floor fabrics; Fastenings therefor
- A47G27/02—Carpets; Stair runners; Bedside rugs; Foot mats
- A47G27/0212—Carpets; Stair runners; Bedside rugs; Foot mats to support or cushion
- A47G27/0218—Link mats
Definitions
- This invention relates to a mode of constructing gratings and the component bars thereof, which renders them practically im pregnable to clandestine attacks.
- I construct the 1 vertical bars which enter into the composition of a grating, each bar of two concentric members that is to say, exteriorly of a tube, pipe, or sleeve of wrought-iron, .riveted at top and bottom to horizontal Crossbars, and interiorly of a core, consisting of one or more cast-steel or other hard metallic cylinders, which, being capable of turning freely upon their axes, op-
- My invention is more especially designed for the gratings of jails, and intended to frustrate efforts of prisoners or others to saw asunder the-bars of such gratings.
- Figure 1 is a perspective view of a portion of a grating embodying my invention.
- Fig. 2 is a vertical section of portions of one of my composite bars.
- Fig. 3 is a horizontal section of the same, together with a top view of a portion of one of-the horizontal bars.
- A may represent two of the vertical, and 13 four of the horizontal, fiat bars, which latter, being riveted or otherwise firmly secured to the former, constitute therewith the principal frame-work of the grating. These bars may.
- solid cylinders or rods of cast-steel or other toughalld hard metal are solid cylinders or rods of cast-steel or other toughalld hard metal. These solid cylinders or rods are inclosed within the wroughtiron tubes or sleeves D, and may have pointed lower extremities, e. The length and conseqnentn umber of these cylinders are dependent on ability in the manufacturer to produce them of such a hard temper as to resist a burglars drill or saw, and, while so making them, to
- Steel plates F riveted to the top of the uppermost horizontal bar and to the bottom of the lowermost horizontal bar, serve, while protectin g these bars, to confine the rods E within their respective sleeves.
- each rod occupies a single sleeve
- each rod rests on the top of that next below it, and may be either pointed, as above explained, or have a ball of cast-steel or other hard material interposed between it and the rod or bar below it, and these rods may be solid, as represented, or may be hollow.
Description
T. I. BAKER.
' Grating.
No. 207,476 Patented Aug. 27, I878.
m. 1 3 MM I y/ WM W d MW 1m THOMAS F. BAKER, or CINCINNATI, onIo.
IMPROVEFM ENT. IN GRATINGS.
Specification forming part of Letters Patent No. 207,476, dated August 27, 1875 June 8, 1878.
To all whom it mayv concern:
Be it known that I, THOMAS F. BAKER, of
Cincinnati, Hamilton county, Ohio, have invented a new and useful Improvement in Gratings, of which the following is substantially descriptive: This invention relates to a mode of constructing gratings and the component bars thereof, which renders them practically im pregnable to clandestine attacks.
-\Vith this object in view, I construct the 1 vertical bars which enter into the composition of a grating, each bar of two concentric members that is to say, exteriorly of a tube, pipe, or sleeve of wrought-iron, .riveted at top and bottom to horizontal Crossbars, and interiorly of a core, consisting of one or more cast-steel or other hard metallic cylinders, which, being capable of turning freely upon their axes, op-
erate to quickly blunt the burglar or prisonbreakers saw, and thus bafiie his attempts to sever the bar.
My invention is more especially designed for the gratings of jails, and intended to frustrate efforts of prisoners or others to saw asunder the-bars of such gratings.
In the accompanying drawings, Figure 1 is a perspective view of a portion of a grating embodying my invention. Fig. 2 is a vertical section of portions of one of my composite bars. Fig. 3 is a horizontal section of the same, together with a top view of a portion of one of-the horizontal bars.
A may represent two of the vertical, and 13 four of the horizontal, fiat bars, which latter, being riveted or otherwise firmly secured to the former, constitute therewith the principal frame-work of the grating. These bars may.
be either wholly of steel or may be of wroughtiron, armed with steel facings O, riveted, welded, or otherwise firmly attached to them.
1) are the exterior wrought-iron pipes, tubes, or sleeves, which, being passed vertically through circular orifices b in the horizontal bars B, are riveted to the uppermost and lowermost ones, as at d, and thus form the bond between the horizontal bars and stiles, and aid in retaining in proper place and securing from observation and from being tampered with the internal rotatable ro'ds.
application filed E are solid cylinders or rods of cast-steel or other toughalld hard metal. These solid cylinders or rods are inclosed within the wroughtiron tubes or sleeves D, and may have pointed lower extremities, e. The length and conseqnentn umber of these cylinders are dependent on ability in the manufacturer to produce them of such a hard temper as to resist a burglars drill or saw, and, while so making them, to
have them so nearly straight as to permit them to turn freely on their axes. These cylinders might each one beas long as the vertical height of the grating, but for the fact that the process of tempering always operates to bend them to some extent. This deflection in the process of tempering, increasing with the length of the rod, practically limits-the length in rods intended for free rotation; The requisite approach to rectilinearity being attained, the longer these rods are, within the limits of their containing-sleeve, the better, and consequently for gratings of small or moderate height a single rod to each sleeve may suffice.
Steel plates F, riveted to the top of the uppermost horizontal bar and to the bottom of the lowermost horizontal bar, serve, while protectin g these bars, to confine the rods E within their respective sleeves.
Where more than one rod occupies a single sleeve, each rod,- except the bottom one, rests on the top of that next below it, and may be either pointed, as above explained, or have a ball of cast-steel or other hard material interposed between it and the rod or bar below it, and these rods may be solid, as represented, or may be hollow.
I claim as new and of my invention- In combination with the transverse bars of the grating, the rotatable saw-proof rods and wrought-metal tubes inclosing the rotatable rods and riveted in the said transverse bars, so as to retain them in their proper position in the grating, substantially as set forth.
In testimony of which invention I hereunto set my hand.
THOMAS F. BAKER.
Publications (1)
Publication Number | Publication Date |
---|---|
US207476A true US207476A (en) | 1878-08-27 |
Family
ID=2276880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US207476D Expired - Lifetime US207476A (en) | Improvement in gratings |
Country Status (1)
Country | Link |
---|---|
US (1) | US207476A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4395861A (en) * | 1979-08-08 | 1983-08-02 | Boris Fipke | Security grid for lighting shafts and the like |
US4669239A (en) * | 1986-02-12 | 1987-06-02 | The William Bayley Company | Security bars and barrier grids incorporating same |
US20080225174A1 (en) * | 2007-03-14 | 2008-09-18 | Lance Greggain | Interference avoidance in a television receiver |
US20110072734A1 (en) * | 2006-07-12 | 2011-03-31 | Newby Roland L | Compact interior safe room |
EP3412856A1 (en) * | 2017-06-07 | 2018-12-12 | Jarmo Sääf | Lattice wall for a security cage |
US20210156134A1 (en) * | 2019-11-26 | 2021-05-27 | A.H. Beck Foundation Co., Inc. | Border Security Barrier |
-
0
- US US207476D patent/US207476A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4395861A (en) * | 1979-08-08 | 1983-08-02 | Boris Fipke | Security grid for lighting shafts and the like |
US4669239A (en) * | 1986-02-12 | 1987-06-02 | The William Bayley Company | Security bars and barrier grids incorporating same |
US20110072734A1 (en) * | 2006-07-12 | 2011-03-31 | Newby Roland L | Compact interior safe room |
US20080225174A1 (en) * | 2007-03-14 | 2008-09-18 | Lance Greggain | Interference avoidance in a television receiver |
EP3412856A1 (en) * | 2017-06-07 | 2018-12-12 | Jarmo Sääf | Lattice wall for a security cage |
WO2018224597A1 (en) | 2017-06-07 | 2018-12-13 | Saeaef Jarmo | Lattice wall for a security cage |
EP3786409A1 (en) * | 2017-06-07 | 2021-03-03 | Inventor Jam AB | Lattice wall for a security cage |
US20210156134A1 (en) * | 2019-11-26 | 2021-05-27 | A.H. Beck Foundation Co., Inc. | Border Security Barrier |
US11585081B2 (en) * | 2019-11-26 | 2023-02-21 | A.H. Beck Foundation Co. | Border security barrier |
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