US81666A - Mary j - Google Patents

Description

@nitro tatrs jatrnt @ffies RIGHARl) MONTGOMERY AND MARY J. MONTGOMERY, Oh NEW YORK, N. Y.

Lettere Patent No. 81,666, datent September 1, 1868.

IMPROVEMENT IN BRIDGES.

TO ALL WHOM- I'l MAY CONCERN:

Be it known that we, RIcnAnp MONTGOMERY andv MARY J. MONTGOMERY, ofthe city, county, and State of New York, have invented certain new and useful Improvements in the'Form, Construction, and Arrangement of Beams and Columns for Bxjdges and other Structures; and we do hereby declare `the following to be a. full and exact description thereof, `reference being had tothe accompanying drawings, forming a part of this specieation, in which- Figure 1 represents our invention as applied in the construction of a bridge.

Figure 3, 'its application in u. column for building purposes, and the support of elevated structures, and

Figure 2 isen enlarged-vertical section in the line :o :e of iig. 1. l

The nature of our said invention consists, first, of an improvement in the construction of double-cerrugated beams and columns, by the insertion or interposition of a. plain, longitudinal binding-plate between the two opposite faces of 4the double longitudinally-corrugated plates, constituting said beams and columns; and,

second, in e novel combination of the diagonal stays or vbraces of bridges, roofs, and similar structures with said double-eorrugatedbeams and bolumns,by causing the said stays or braces to pass through, between the lopposite faces ofthedouble-corrugated plates, forming'said beams and columns, as will be more fullyshown.

In the accompanying dra-winrgmrA A represent metallic plates, corrugated longitudinally in double folds. Where thegreatest possible strength is desired, each fold is increased in thickness at its curve a, as shown in iig.` 2. Such plates A A, when united with their outer edgesfacel to face, possess'immense strength in proportion to their weight in resisting any strain having a tendency to bend or break them in a plane coincident with the direction of their folds, but they are comparatively deficient in strength in adirection 'at right angles thereto, from the fac-t that they-receive no support in that direction, and that the folds are liable to spread openand apart when unduly strained. To obviatc this defect, and'to equalize the strength of the double corrugated beams and columns in all directions, we insert between the two doubly-corrugated plates A A a plain, straight, comparatively thin plate, D, corresponding in length therewith, andof such a. width as that its edges shall extend out 'to and beyond the outer cdgesof the corrugated plates. When itis so inserted, the two corrugated plates A :A are united upon this intermediate binding-plate D, by4 means of rivets passing entirely through them all, as seen in lig. 2.

Columns, beams, or girders lso constructed, possesso. maximum of strength with a minimum of weight,

`and afford an equal resist-ance to strain, whether of tension, torsion, or compression, vin all directions alike.

.In using the double-corrugated beams, in combination with diagonal braces C, we insert orpass the braces C between the opposite doubly-corrugated plates A A, forming the same, instead of the plain bindingplate 1),'jnst described, either omitting said plate Dentirely, or so cutting it awayas to leave the space required forth? insertionof the stays. This mode of combining the stays with the'supporting-columns and vboiunsot' bridges, and similar structures, avo'iils allyneccssity of cutting or weakening thevlatter, and affords o. very strong` combination of the two, increasing grcatlythe strength 'of the entire bridge, roof, or other structure-.zf Y 'A "6in1:V improved columns are supported at their lower endsby heavy plates or pieces, 'so groove'd'nsto i .becomecounterparts of the corrugated' plates'ot` the column. They nret'ted against-these plates 'attheir base, and drawn together thereon'by means ofbelts and nuts, as illustrated in ig. l

Transverse bolts are also inserted through the hed-plates, to pass through the folds of the corrugated 4u rivht lates formin the column, and e. ver stronv, sure combinationl of the same with the base or founda- P p P te y s tion thereof is thusl obtained. v

Having thus fully described our invention, we claim therein as new, and desire to secure by Letters Patente- The'combina'tion, substantially asand-for the purpose herein set forth, of 'an intermediate binding-plata,

A D, with vthe doubly-corrugated'plates A, forming the double-corrugated beams and columns herein described.

,We claim-also, in the construction of bridges, roofs,l and similar structures, with double-corrugated beams und columns, the combination of diagonal strays and braces withA said beams and columns, by passing the Stays or braces between the opposite platee of the beams and calumnia, substantially in the manner and for the purpose herein set forth.

Theforegoing specification of our improvements in corrugated-metal structures, signed by us, this 22d day of July, 1868. v

R. MONTGOMERY, MARY J. MONTGOMERY.

Witnesses:

DAVID A. Brum, 1 H. H. .YOUNW }us. to RICHARD MONTGOMERY. H. TLMcILwAIN,

JOHN CRAWFORD, us to MARY J. MoNTooMEnY.

Images