US430482A - louse - Google Patents

Description

(No Model.)

, I'. R. H. LOHSE.

DOOR.

No. 430,482. Patented June 17, 1890. l

UNITED STATES PATENT OFFICE.

FRANK R. Il. LOI-ISE, OF ST. LOUIS, MISSOURI.

DOOR.

SPECIFICATION forming part of Letters Patent No. 430,482, dated June 17, 1890.

Application filed February l2, 1890. Serial No. 340,103. (No model.)

To @ZZ whom it may concern.-

Be it known that I, FRANK R. II. IJOHSE, of the city of St. Iiouis, in the State of Missouri, have invented a certain new and useful Improvement in Doors, &c.,of which the follow ing is a full, clear, and exact description, reference being had to the accompanying dravings, forming part of this specification.

This invention relates to the combination, with dovetail blind mortises in dooeframes, dac., of expanding dovetail tenons, which, as their expanding wedges are driven home against the bind terminals of the mortises, transform the shape of said tenons to fill said dovet-ail mortise, and so look the tenon-inortise joint 5 and the invention consists in features of :novelty hereinafter fully described, and pointed out in the claims. Y

Figure I is a front elevation of a door in which my invention is ineorporated,with parts broken away to show the construction of the same. Fig. Il is an enlarged detail vertical section and shows the expanded tenon locked home within the dovetail blind mortise. Fig. III is a detail vertical section taken on line III III, Fig. II, and shows a transverse section of the expanded tenon that'fills the dovetail mortise in which it is locked and Fig. IV is a vertical section taken on line IV IV, Fig. Il, and shows one of the tongue-and-groove jointed panel-rails provided with a channelgroove, within which the panel is held.

Referring to the drawings, I represents the vertical stiles of the door-frame, which may be a core-frame, as shown in the drawings, with a veneer covering 2 on its face and bead 3 on its out edges, but more frequently the frame is not veneered, for as the mortise is blind an equal nish can be effected without veneer and as good a door be produced. 4 are the horizontal cross-bars that couple said stiles together, and together constitute said frame of the door.

5 represents dovetail blind mortises in the stiles of the frame, which, as their name denotes, stop short of penetrating through said Stiles, leaving a blind section 6 in the out edges of the stile that blind or hide the mortise and tenon inclosed therein from view and, when an outside door, from the weather. The said mortise is made of a dovetail form, flaring diametricall y toward said blind section. The dovetail mortise is thus of such a form that it houses and locks the fiaring dovetail tenon '7, which is of uniform thickness, but flares in width toward its extremity when eX- panded. The ten on is thus locked in its dovetail mortise, but it is evident that the enlarged dovetail fan terminal `of the tenon could not pass through the more restricted mouth of the mortise. Therefore the tenon in my device is primarily constructed of uniform diameter from the shoulder toits extremity corresponding to the diameter of the mouth of the mortise. Vedges S are preferably made of wood, as is the frame; but said wedges may be made of iron or any other suitable mate` rial. 'lhe chisel-pointed ends of said wedges are inserted transversely of the tenons at their farther ends, but not driven in Sudiciently to apprecably increase the diameter of said tenon by the initial spread of the divergentlips 9 of the split. seat 10 of said wedge. The tenon can thus be freely entered 'through the mouth of the dovetail mortise, and after the Haring end of the wedges reach the blind sect-ion G at the remote end of said mortise the further insertion of the tenon Within the mortise opens out or expands said tenon into the flaring dovetail form shown in Figs. I, II, and III, thus tightly filling up the dovetail mortise and locking the tenon therein, so as to elfecta tight firmly-held joint. Now the invention is especially adapted for use in blind-mortise joints, it is evident that said previous straight tenons could not beV eX- panded to their dovetail locking form except by the means above described and shown,for the blind or closed section at the farther end of said mortise would bar the Way for the insertion of wedges; also,without said dovetail-tenon mortise-joint there cannot be as permanent a tight joint effected.

l1 represent the tongue-and-groove jointed panelfraine rails, Whose tongues l2 fit in the grooves I3, respectively, in thc stiles and crossbars, and whose ehannehgrooves llhouse and hold the edges of the panels 15 of said door.

The cross-bars of the door may be provided with single tenons, as shown inthe second bar of the door in Fig. I and as shown in Fig. II, or they may (and such is preferable with the IOO bottom bars of doors) be provided with dual tenon mortise-joints, as shown in the bottom cross-bar joint, also shown in Fig. I, or with any number of said joints desired. The Wedges may, if desired, be dipped in glue or other adhesive material before their insertion to add to the tenacity of their hold. The Wedges are preferably inserted transversely near the out edges of the tenons, so as to both look said tenons and also thus, by at the same time passing through the tongues 12 of the tongue and -groove panelrails, both said tenons and rails are oonjointly interloeked Within the dovetail mortises of the stiles, and the various parts of the frame are thus firmly compacted and looked together. While the above is the preferred posit-ion for the wedges,

they may, however, be inserted in any inter-r vening position in the tenon.

The invention is alike applicable for shutter and other frames, as well as those of doors.

I claim as my invention- In door or like frames, the Combination of the stiles provided With dovetail blind mortises hid by blind sections at the outer edges of the stiles, grooved cross-bars havin g tenons, panel-rails having tongues litting into the grooves of the cross-bars, the tenons of the latter and the ends of the panel-rails. entering said mortises, and Wedges driven into the ends of the panel-rails to spread them Within the mortises, substantially as shown and described.

FRANK R. H. LoHsE.

In presence of- ENJN. A. KNIGHT, SAML. KNIGHT.

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