US1113368A

US1113368A - Stair structure.

Info

Publication number: US1113368A
Application number: US77099613A
Authority: US
Inventors: John T Nesdall
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-05-31
Filing date: 1913-05-31
Publication date: 1914-10-13
Anticipated expiration: 1931-10-13

Description

J. T. NBSDALL. STAIR STRUGTURE. 'APPLICATION PILED MAY 31. 1913.

i, 1 l 3,368. Patented Oct. 13, 1914.

2 sHsETs- ,....IIII/' HIM cum& v WM J T; NBSDALL. STAIR STRUOTURE. APPLICATION FILLD MAY 31. 1913,

. Patented Oct. 13, 1914.

2 SHEETS-SHEET 2.

ai' anal W r L IJOHN 'ri NESDALL, or -BBooKtYN, NEW YORK.

smun STRUCTURE.

Specification of Letters ?atent Patented Oct. 13, 1914.

Application filed Maj 31,1&13` Serial No. 770396,

To all whom it may com-cm:

Be it known that I, JOHN T. JNESDALL, a citizen oi' the United States, residing at Brooklyn, in the'State of New York, have `inventcd certain new and useful Improvements in Stair Structures, 'of which the following is e .specicztiom reference being had thercin to the accompunying drawing;

This invention relutes to star structures.

The primzry object of my invention is to enable the Components of the structure to be constructed at e fuctory, say, und then be set up t the point of use With a minimum of labor and Without the requirement of skille worknen.

It is also :in object of the invention to provide it stuir structure that, When fubricated at the place of use, will retztin stability and yet will be such that the Components of which it is constructed muy be Conveniently removed or replaced.

-At the present day, in certain of the large cities, the building regulzitions are exceedingly stringent and require that stair structures, and especially in apartment-houses and the like, shall be constructed of metal and be such, in case of fire -which frequently ccntersut the stziirway of a buildingthot such stnir structures shell' retnin e high degree of stability. It is Well known that the Stlll'S of a building :tre among the most expensive pnrts. In the erect'on of stair st-intn-pq %t has been the aim to form the Components thereof as chenply ;s possible and this is uccomplished, 'or example, by stamping` these Components out of sheet motel. If the oforementicned building regulntions :re such that the riser-ud-tread units of the structure must be of a presbribed thickness, the difiiculties of stamping out the parts :tre thereby greatly increased. c provide 'for this condit on, I-hve devsed a stai r structure 'wlllCh includes e minimum of conponents, and these Components ere so for'ned that, while the bending Operations ere co'purutively few, yet, when the structure is fnbricnted, it is stable and rigid, and such stibility and rigidity are accomplished without the use of bolts or other like securing instrumentzlities.

The invention compriscs, in one nspect, a combined trend-nnd-riser unit so formed that, With a minimum of sl ill and labor, it

-mey be placed in position between a pair of stringers end self-lcicked so to speak) with' said stringer.

In mother aspect of the invention, it resdes n certa n nox el details of Construction and arrangenent, all :is hereinnfter more particularly described and claimed.

* The hccompenying drawings, referred to her'ein and constituting u part hei-cof, illus trute :i preferred -mbodiment of the inVention, the same serving in connection with the description herein to explain the principles of the invention.

Referring' to these drawings: Figure l is a View in perspectire, and soncwhut fragmentary, oj' zi portion of e fi'iglt of steirs, certain of the parts being broken away more clearly to show structure which would otherwise be hidden; Fig. 2 is n. View in perspective of one of the combined treed-and-ri I units; Fig. 3 is :i View in Vertical cross-section of one of these units; F is e fragnientary View, partly in eleii'ntion und purtly in Vertical section, showing the uznner of :ttuching such units to the stringers; Fig. 5 is u regnentary View, in horizontal section on ,the line Fig. s; Fig. (3

is :i 'rugnentary View in sectionzl elevztiou ot' u modified form of structure, the modification in this instance residing in the form of the riser-uttztching means; Fig. 'i' is :i similar View of another modified form of structure, the modification in this 'instence residing in the form of the tread ztttziching means, and Fg 8 is u fragmentin-y View in sectionel elevntion of a portion of one of the stringers, in modified form, showing the slotted &ngulur portion: thereof.

In the embodinent illustruted in the' ec',

conpunying druwings by way of amm the -stair structure lmon ss including a pair of stringes each provided with slotted angulated unit-supporting fiange, and a series of combined treadand-1'iser un'its, each unit including a. ticed-portion provided with an elonguted enchoring and strengthening finnge adapted to engage in certain of seid slots, andthe riser-pcrtion being provided with ;i rearwardly extendin flangehnd With pendant lugs adapted to rest upon said stringer-fiange and to extend through certain of the Slots thencin. The

different units ere ,entirely independent of each other n the sense that they ere unconnected one with enet-her so that &ny one placed without distu'bipg in any way any r other of the units'.

At' the same tinc, the units are attached to the st'ingers in such a manner that they are, for all intents and purposes; absolutely rigid there-with.

The stringcrs 1 are forned, preferably 'at their lower edgcs, with an angulated 'flange or portion 2. u This fiange is providedwith iucuts or slots and 4:, these being in spaced relation, and arranged in pairs, each pair being (in the embodiment illustrated' in Figs. 1 to 7) separated by an elongated portion 2 of thefiange, as shownin Fig. 4:.

In Fig 8, a somewhat modified form of stringer is illustrated, and in this instnnce the angulated portions 2 are formed only at the place where the units are to be Secured.

Adapted to be supported between each pair ot stringers is a combined tread-andriser unit 5. This unit includes, preferably, a substantially horizontal tread-portion 6, provided with a` pendant fiange 7 which, preferably and as shown, is of approximately the same length as the riser 6 and is adapted to extendthrough the slots 3 in the stringer-flange 2 Ordinarilyfthis flange 7 will constitute a substantial anchoring instrumentality for securing the unit, at its upper portion, to the strngers. If, however, it be-desirabl'e to provide for additional securement, said fiange may be angulated to form a portion 7 as shown in Fig. 7, that is to say the lugs may, after the units are placed upon the stringers, be bent to an angle to form said angulated portion 7 The unit ,5 also comprses a substantially vertical riser-porti'on 8 which,` at its lower end,'is provided with a rearwardly extending angulated fiange 9 and with two angulatecl lugs or extensions 10 which are adapted to extend through the Slots 4 in the stringer-fiange 2 and, thus, constitute anchoring instrumentalities ;for seouring the lower portion of the units 5 to the stringers. The 'lange Q may, if desired, rest upon the section 2 of the stringer fiange 2 and thereby 'aid in supporting the unit at this point.

Orclinarly, this' form of structure is sufiicient to efl'cct a rigid secureme'nt of the lower portion of theunit to the stringer; yet, ifadditional securement is desirecl, the lugs 10 may be bent or otherwise formed (after theytread-and-riser unit is placed upon the angulated portion of the stringer) to'provide an' angula ortion 10 as shown in Fig. 6.

' In fabri'cating my improved form of stair structure, the' stringei's 1-, l will be set up and Secured' in" any desirecl manner, and -with the fianges on each. extending inwardly and-towardfleach other, as shown v Figil; The 'tread-ands-riser :nnits-havng prewously-beer foried-are then convenie'tly'placed in position, and this is acconplished by inserting the fiange 7 and the lugs 10 through the

Slots

3 and 4, respectively. This may be done simultane- .ously, or the flange 7 may first be hooked into the slot 3 and then the anchoring lu-gs 10 positioned in the slots 4:. It is to be undcrstood that I may rely upon the inherent resiliency of the metal of which the units in position; and, to this end, the free. ends of the riser-portion 8 and the treadportion 6 may be so preformed that a slight units are co'structed to aid in holding these springing thereof Will be necessary in order .rigid attachment of the tread-portion 6,' the flange' 7 may be bent up against the lower; face of the stringer-flange 2, as shown in- Fig.- 7, though it is to be understood that this bendng may be done before the units: are placed in position'. Likewise, the lu'gs lo'may be bent, as shown in Fig. 6.

From the foregoing, it will be understood that the various Components 'and instru-- -mentalities, singly and in their cooperation, contribute to eifect a reliable and stable stair structure, and tha-t a Construction has been provided which realizes the objects of the invention and the advantages herein set' for-th, together with other objects and advantages. t

The invention in its bro'ader aspects is not limited to the particular Construction shown nor to .any particular Construction by which it has been or may be carried into efi'ect, as many changes may be made n the construction without departing from the main principles ofethe invention and without sacrificing its chief advantages.

1. A emir-structure includin two components, one of these being a pair of stringers provided with su porting sections integral with the body o the stringer'; the second Component comprising a combined* riser-and-tread unit, the riser-portion there-` of being provided with an anchoring flange adapted to engage with and rest upon the supporting section of the stringer, and the tread-portion thereof being also provided with a strengthening flange'adapted to ex-- tend over and rest upon a supporting section of the stringer; the tread-and-riser unit being supported on said stringer independent of any other tread-and-riser 'unit there on.

2. A stair-structure including two components, one of these being a pair of stringers provided with spaced su portin sections integral with the body o the strmger;

the second Component comprising a combined riser-and-tread unit, the riser-portion thcreof being provided With an anchoring fiange adapted to' engage With and rest upon the supporting section of the stringer, and the trend-portion thereof being also provided With a strengthening fiange adapted to extend over and rest upon a support e ing sectionof the stringer; the tread-andrser unit being supported on said stringer independent of any other tread-and-riser unit thereon.

3. A stair-structure including two components, one of these being a pair of stringers provided With spaced supporting sections integral With the body of the strnger; the secondcomponent comprising a combined riser-and-tread unit, the riser-portion thereof being provided With a plurality of pendant anchoring portions adapted to extend over and rest upon said supporting sections of the stringer, and a riser-strengthening flange integral with the body of the riser, and the tread-portion of the unit being pro-- vided With a strengthening and anchoring flange adapted to extend over and rest upon a supporting section of the stringer; the tread-and-riser unit being supported on said stringer independent of any other treadand-riser unit thereon 4:. A stair-structure including, as components, a stringer provided With an integral angulated unit-supporting portion divided into sections, and a combined tread-andriser Component, said Component being provided With integral stringerattaching means including portions angulated With respect to each other, some of which ortions extend over and rest upon the sections of said unit-supporting portion of the stringer.

` 5. A stair-structure including as one component a pair of stringers each provided With an angulated unit-supporting portion, and a series of combined tread-and-riser units adapted to rest upon said stringers one entirely independent of the other, and formed With integral means adapted to engage and rest upon the angulated portions of the stringer, said means including a plurality of flanges occupying relatively dillerent planes and adapted to project through said stringer portion wlereby said units may be removably attached to the stringers.

6. As an article of manufacture, a combined t'ead-and-riser unit for stair-structures including a substantiall vertical riserportion provided with an angulated fiange and a plurality of pendant anchoring lugs, said lugs being arranged in juxtaposition to and at an angle to said angulated fiange,

and a substantially horizontal tread-portio-n provided With a pendant anchoring-fiange.

7. As an article ot' manutacture, a combinecl tread-and-riser unit for stair-structures including a substantially horizontal trcad-portion provided With a pendant anchoring iange, and a substantially vertical riser-portion provided With an angulated instrumentality extending from the rear face of said vertical portion and in the direction of said flange on the horizontal portion, said vertical portion being also pmvided With a plurality of pendant luge arranged in a plane substantially parallel'with said vertical portion.

8. A stair-structure including in combination, a ,pair of stringers each provided With an integral angulated unit supporting portion, said portion being forned With a series of slots; and a combined tread-and-riser 'unit adapted to be positioned betwen 'the stringers, said unit comprising asubstan,

tially horizontal tread-portion provided with a pendant fiange adapted to'project through certain of the slots in said angalated portion of the stringer, and a substantially vertical riser-portion formed' With a rearwardly extending fiange adapted to rest upon said angulated portion of the stringers and provided with a plurality of integral pendant lugs adapted to extend through certain of the slots in said angulated portion, the different tread-and-riser units disposed between said stringers being entirely independent oneof the ot-her.

9. A stair-structure including apair of stringers each provided with an\ integral angulated fiange formed With a series ot slots, and a series of tread-and-riser units adapted to be disposed between said stringers and entirely independent of each other, each unit comprising a substantially horizontal tread-portion provided With a pendant anchorin fiange adapted to extend through certain of the slots in said stringen fiange to secure the tread-portion of the unit thcreto, and a substantially vertical riser-portion provided With a rearwardly extending 'lange occupying a position at an angle to the riser-portion and paralleling the stringer-fiange, said riser-portion also being provided With a plurality of angulated lugs occupying a position substantially parallel withsaid riser-portion and at an angle to said stringer-iange and constituting a means for securing said riserportion to the stringer.

10. A stair-st'ucture including, as components, a stringer comprising a body-portion and a recessed integral angulated unit-supporting portion eXtendinglongitudinally ot the body-portion, and a combined trendand-riser unit provided With integral stringer-engaging and attaching means including a plurality of portions arranged in angular relation with respect to each other, some of the portions being adapted to extend over and rest upon said unit-supporting portion of the stringer and other pendi aire sustaned by sai& unit-supporting 10 Sha struge'. i parton While other pendantportons' exend 11. A si( ure lcudg, compoinate said filot&

'er sorfec with an. integml f In testmony Whereof I affix my signature anguhted. int-sppo tng portion pxoved in presence of two. witnesses.

am pertons e;

wh slotsgan cmbnec trea-anrrser I JOHN T. NESDALL. um& provi zasi *with a, purazy 03"? I 'tnessss: pertms angumted wth respect to each! GEORGE B. RYAN,