US1166740A - Silo-door construction. - Google Patents

Description

A. N. BRAGSTAD. SILO DOOR CONSIRUC-HON. APPLICATION FILED AUG. 1a, 1914.

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Patented Jan. 4, 1916.

0 A 1 0 o w m fl 5 m o mo 0 1 ID k Fmfl. H 1 9w O 70 O m w m o m, F. 9 O O m 6 3 K m 3 h m 4 10 17V Lg 'ADOLPH N. BRAGSTAD, OF CANTON, SOUTH DAKOTA.

SILO-DOOR CONSTRUCTION.

Specification of Letters Patent.

Patented Jan. 4, 11.916.

Application filed August 18, 1914. Serial No. 857,376.

To all) whom it may concern:

Be it known that I, Aoonrn N. BRAGSTAD, a. citizen of the United States, residing at Canton, in the county of Lincoln and State of South Dakota, have invented certain new and useful Improvements in Silo-Door Construction, of which the following is a specification.

This invention relates to certain new and useful improvements in silo-door construction.

The primary object of this invention is to provide a door construction especially adapted for employment with silos built of concrete blocks, a plurality of such constructions being arranged one upon the other and forming a vertically arranged series of separate openings, each provided with its individual door.

It is also designed to form a, door construction consisting of the frame and the door, the door being provided with a lock and hinges and the frame supporting ladder steps which cooperate with similar steps of the adj accntlv positioned construction.

Another object of the device is to provide double hinges for the silo door for floating the door directly into the frame when closing but allowing the door to swing to its fullest extent rearwardly when opened, the door itself being hollow forming a heat insulating air space therein.

\Vitlr these general objects-in view and others that will appear as the nature of the' invention is better understood, the same consists in the novel combination and far rangement of. parts to be hereinafter more fully described, illustrated in the accompanying drzuvings, and set forth in the appended claims.

In the drawings forming a part of this application and in which like-designating characters refer to corresponding parts throughout the several views, Figure 1 is a perspective view of the exterior of the de-' vised door construction illustrating the door in its open position, and with the adjacent blocks positioned in the course of construction. Fig. 2 is an enlarged exteriorfront view of the device with the door closed. Fig. 3 is a central vertical transverse'scctional view thereof. Fig. 4 is a central horizontal transverse sectional view of the same, and Fig. 5 is an enlarged detail view of one of the door hinges and the adjacent portions of the members connected thereby.

Referring more in detail to the drawings,

it will be noted that the invention is de signed to provide a door, or a series of doors vertically arranged through the side wall. of a silo which is constructed of concrete blocks 10.

The present construction is preferably formed entirely of metal, and consists of the rectangular frame 11 providing the doorway or opening 12 therethrough. The

opposite side walls 13 of the frame 11 have longitudinally positioned spaced-apart angle-irons 14: upon their outer sides, which angleirons are adapted to engage and position the blocks 10 in their spaced relations and forming an air-space 15 therebetween after the usual manner of this form of construction of block silo-walls. Band wires 10 are adapted to be secured at their ends through openings 17 of the angle-irons 1i and to lie between the blocks at each layer thereof throughout the wall formation.

Channel-irons 18 bent in substantially U- shaped steps are secured to the frame 11 preferably interiorly thereof, and adjacent the top and bottom walls 19 of the frame. It will be apparent that when the entire wall of the silo is completed after this manner, and with a plurality of the door frames mounted upon each other and secured with-. in the wall, that the lower step of each frame will substantially aline and lie ad-" jacent to the upper step of the adjacent door frame, and in this'manner a complete ladder of uniformly spaced steps will be formed from the bottom to the top of the walls. l r

A door 20 is provided for the frame which isrectangular in shape and is formed hollow and with an inner air-chamber 01' space 21 which renders the door insulated againstheat. The frame 19 is provided with an angle-iron inwardly projecting fian e 22 positioned entirely around within the fi'ame, and the door 20 is adapted toclose by a straight inward movement so as to seat its outer face 23 firmly and flatly against the inner side of the said flange 22, and contacting a cushion packing 22 upon the said flange.

The edges of the door 20 are provided with a completely encircling flange 2st formed by projecting the inner wall 25 of the door at' each side thereof. In. the door closing operation, the side edges 24: of the door are adapted to Slide. within and in con;

ings.

tact with the inner face of the rame 11 so that when completely closed, the door face 23 seats upon the frame flange cushion 22 and the door flange 2a rests upon the inner edge of the door frame 11, thus forming an air insulated door opening inwardly of the silo and forced closed by the contents of the silo. A swinging lock or latch 26 is pivoted to the exterior of"th?-i do or and adapted to engage over the adjacent portion of the frame flange 22 for retainiiig the door closed as illustrated in Figs. 2 and a of the drawhe special form of hinges now provided consists of the end leaves 27 which are secured to the outer face of the door at a point spaced from the hinged edge thereof, and to the outer side of the adjacent frame flange 22. Leaves 28 of equal'length are centrally hinged together as at 29 and are in turn hinged at their free ends asat 30, to the inner edges of said end leaves 27. Connecting strips 31 are secured between .the oppositely positioned leaves 28, which insures a uniform movement of the hinge members. i

From this detail description of the door and hinge formation, it will be seen that by reason of the double leaves provided for the hinges, that the door is capable of swinging entirely inwardly of the silo and free I and clear from the door frame 11 as illustrated in Fig. ,1, while the direct closing of the door folds the hinges with a flat engagement between the leaves 28 thereof as illustrated in Fig. 4, and inwardly of the frame flange 22 andallowing the door to flatly eninsulating means throughout the entire area of the silo exterior. I 1

While the forms of the invention herein shown and described, are what are believed to bevthe preferable embodiments thereof,

maestro minor changes may be made therein. without departingfr'om the spirit and scope of the invention as claimed.

iv hat I claim is l. The combination with a-metallic door frame having a flange projecting inwardly therefrom in spaced relation to the outer edge of the frame whereby to form a door receiving rabbet; of a door fitted within the rabbet; and hinges connecting the door and frame, each consisting of four leaves, the intermediate leaves being free from the frame and door and the terminal leaves so connected, respectively, to the frame and door as to cause the intermediate leaves to lie in a plane parallel to the door when the door is closed, whereby said hinges permit direct lineal movement of the door into and out of the frame and permit of close seating of the door throughits periphery.

2. The combination with a metallic door frame having a flange projecting inwardly therefrom in spaced relation to the outer edge of the frame whereby to form a door receiving rabbet, of a door fitted within the rabbet, and hinges connecting the door and frame, each consisting of four leaves, the

intermediate leaves being free from the frame and door and the terminal leaves so connected, respectively, to the. frame and door as to cause the intermediate leaves to lie in a plane parallel to the door when the door is closed, whereby said hinges permit direct lineal movement of the door into and out of the frame and permit of close seating of the door through its periphery, said hinges being further so arranged, as'to permit folding of the door flatly, against a structure carrying the frame, when the door is open. o

In testimony whereof I affix my signature in piesence of two witnesses.

ADOLPH n. enaesran.

Witnesses:

OLE OSHEIM, H. A. HANSON.

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