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Publication numberUS2403934 A
Publication typeGrant
Publication dateJul 16, 1946
Filing dateAug 24, 1942
Priority dateAug 24, 1942
Publication numberUS 2403934 A, US 2403934A, US-A-2403934, US2403934 A, US2403934A
InventorsLindstrom Thor G
Original AssigneeLindstrom Thor G
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Building construction
US 2403934 A
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Description  (OCR text may contain errors)

July w 1945- T. G. LINDsTRoM l 2,403,934

BUILDING CONSTRUCTION v Filed Aug. 24, 1942 /fVl/E'NTOR /97' TONE YS Patented July 16, 1946 UNIT ED STAT E S PATENT OFFICE BUILDING CONSTRUCTION Thor G. Lindstrom, Seattle, Wash.

Application August 24, 1942, Serial No. 455,869

2 Claims.

ThisV invention relates to a house construction whererelatively large timbers are employed in forming the walls thereof. More particularly, and by way of illustrati-on and not as a limitation on this invention, `the same relates to a cabin ccnstruction where large timbers, as logs, are employed in forming the walls of the cabin.

There are many second growth timbers inthe United States which are not of a size to be merchantable as logs for forming :lumber and also, for reason of defects as contour, shape, or .partial blemishes.: the same are .not merchantable for piling or telephone poles. There is therefore asupply of materials availablewhichl may beused in constructingzdwellings. and it is an object of my invention to devise a construction which will permit the use of timber of this character in constructing dwellings.

In order to most expeditiously log and yaccumulate logs which. may be used iny constructing the dwelling of my invention, theyl are often .logged with other timbersuch as with logging of piling or telephone polesand thusV the logs are accumulated when they are green and high in moisture content. It is therefore. an object of my invention to Vprovide a construction which will permit the use of green and high moisture containing timber, and thus eliminate defects in the house which would` follow from drying and shrinking of the timber. Often in the drying of green and very moist logs, the shrinkage transversely of the logs may be up to approximately one-half inch to the foot. Of course, the logs or clamp timber have little shrinkage lengthwise of the timber and the shrinkage is transverse of the timber or in a plane at right angles to the length 0r grain thereof. Thus, lin an eight foot wall where the timbers are running at right angles to the height of the wall, the shrinkage may be as great as four inches. It is an object of my invention to provide a construction which will take care of the maximum shrinkage which may be present due to the green and high., moisture containing content character of the timbers whichmay be employed.

It is another object of my invention to provide a keyedv construction between the logs to reduce the otherwise necessary nails and metal contentl of buildings;v

It is another object of my invention to provide a construction wherein the amount of weatherprooiing material necessary may be reduced to a minimum and yet with a maximum tightness of construction.

Itis another object of my invention to provide a construction whereby the exterior appearance of the cabin or dwelling may be enhanced by the natural exterior of the logs (withv or Without .the bark) and at the same time to permit the interior of the cabin or dwelling to be formed directly from the logs forming the exterior walls and thus lessen the cost of the nished interior and, at the same time, to obtain maximum utility from the logs employed.

It is a further object of the invention to provide grooves in the log having round corners therein and to provide relatively dry square keyed members which will t into adjacent grooves in two logs, thus permitting compression of the key member and a weatherproof joint between two logs.

The above mentioned general objects .of my invention, together with others inherent in the same, are attained by the mechanism illustrated in the following drawing, the same being :a preferred exemplary form of embodiment of `my invention, throughout which drawing like reference numerals indicate like parts:

Figure 1 is a view '1n elevation showing a dwelling embodying this invention;

Fig. 2 is a view in perspective `of a timber used in this invention, which timber has been broken intermediate its length;

Fig. 3 is a view similar to Fig. 2 showing a key member employed between the timbers shown in Fig. 2;

Fig. 4 is a fragmentary sectional view showing the timbers of Fig. 2 in superposed relation, and with key members of Fig. 3 positioned therebetween;

Fig. 5 is a perspective view with parts broken away of a corner member used in this invention;

Fig. 6 is a sectional view taken substantially on broken line -B of Fig. 1;

Fig. '7 is a fragmentary elevation showing particularly the corner construction;

Fig. 8 is a perspective View of the corner supporting member shown in Fig. 7;

Fig. 9 is a fragmentary view with parts broken away showing in elevation of a door or a window opening construction employed in this invention;

Fig. 10 is a sectional View taken substantially on broken line ill-l0 of Fig. 9;

Fig. 1i is a sectional view taken substantially on broken line I l-i I of Fig, 9;

' Fig. 12 is a fragmentary View in elevation of a modied form of this invention and particularly as respects an upright supporting member;

Fig. 13 is a sectional view taken substantially on broken line |3-l3 of Fig. 12;

Fig. 14 isa View similar to Fig. 13 showing a still further modified form of this invention; and

Fig. is a fragmentary sectional view, with parts shown in elevationy showing an anchor means which may be employed in this invention to support the upright corner members.

Referring to Figurer 1, a design of house which is well adapted to employ this invention is illustrated. It is to be expressly understood that this invention is not limited to any such specific lform and that the same is only set forth by way of illustration of an appropriate and applicable design.. As many of the parts shown in Fig. 1

relate to standard construction and their utilityv is apparent from their appearance in- Figure 1, such parts are not numbered and not described.

The timbers of Fig. 1, which are in superposed relation and extend in a horizontal plane, are shown in perspective in Fig. 2. `Such timbers 20 have surfaces 24 which form the interior of the dwelling. These may be planed and decorated so that no other interior surface decorating material is necessary. If desired, the corners may be chamfered as illustrated at I9 for sake of appearance. These tim-bers 20 are provided with surfaces I8, each of which will abut with an adjacent surface I8 of another timber 20. In sawing the surfaces I8 these may be rough sawn and the torn fiber obtained from rough sawing will provide a compressible area and thus enhance the weatherproof characteristics of a joint between two timbers 2|). ,The external rounded surface 2| may have the bark of the tree left thereon, or the bark may be peeled to provide the desired external effect. Grooves 22 are provided longitudinally of the timbers 20.. These grooves 22 are preferably provided with a rounded portion asV at 25. The key members 26, shown in perspective in Fig. 3, are provided with square corners and fit in the grooves 22. Thus, as a number of timbers 22 are placedin superposed relation, the square corners on the top and bottom of the keys 26 will be compressed and further enhance the Weatherproof characteristics of the joint between two timbers 2|). Preferably the key members 26 are provided of kiln dried material and the timbers 20 may be of any moisture content, and I eliminate the necessity of kiln drying the tim-bers 2|). Vertical grooves 23 are provided in the respective end portions of the timbers 20 for the reception of keys 30 as will be hereinafter explained` In the event that the logs are of a small size very little waste will obtain if one log is cut to form one timber 20 as shown in Fig. 2. However, if the logs are of a larger size, it will be more advantageous to cut a plurality of timbers 20 from each piece of log, as for example, two.

The plurality of walls of the house will be formed of timbers 20. f To join together registering end portions of timbers 20, which are at right angles to each other, I employ corner members 21 shown in perspective in Fig. 5. These corner members 21, as shown in Fig. 5, have two surfaces at right angles to each other and the remaining surface 29 is preferably arcuate shape for appearance. Two grooves 28 are provided extending longitudinally of the corner member shown in Fig. 5. One groove 2'8 is in registration with the registering grooves 23 of one set of superposed timbers, and a key member 30 joins a plurality of superposed tim-bers 20 with a key member 21. Preferably, in building the house a number of timbers 20 are laid in superposed relation with the grooves 23 at the respective end portions in registration, and then a key member 30 is inserted in the aligned` grooves 23. Then the timbers 20 forming the :wall at right angles to the i'lrst mentioned wall are inserted in place with the surfaces 2| at the exteriorl and with the grooves 23 slidingly engaging the key members 30. This may be continued around forming three walls of the house. As the fourth wall is formed the timbers 20 may be moved downwardly from the top or the construction left loose enough so that upon tightening, the corner members 21, timbers 20, and the keys 30 will all lbe properly positioned.

Referring to Fig. '1 the corner block 3| is provided with a recess 32. This recess 32 is in registration with an upright corner post 21 to permit limited longitudinal movementof the upright corner post 21 and without the same contacting the corner block 3|. By thus providing for movement between the timbers 20 and the corner post 21, the height of the wall obtaining formed of the superposed timbers 20 will not lbe governed by the height of the corner post 21, so that as expansion or contraction takes place no space will obtain between timbers 20.

While the keys 3|] will tend to retain the upright corner post 21 in place, preferably I employ an anchor rod 39 (see Figs. 6 and 15) which is secured to a xed portion at the base of the house, as 40.

As an alternative for the corner post 21 shown in Figs, 1, 5, '6, and 7, there is shown in 'Figs. 12 and 13 a modified form thereof. Here the upright 33 replaces the upright 21 of the previous C figures and is provided with three grooves 34 instead of the two grooves 28. If such an upright 33 is employed, the same may be used intermediate the length of the Wall of a house so that walls forming a T may be installed in the original construction. or provision is made for its later construction. To illustrate, the third wall is shown by dotted lines in Fig. 13 formed of timbers 20. In the event that provision is initially being made for the later construction of such third wall and upright 33 is employed, then a cover or trim 35 may be employed in the original construction for appearance sake.

As another modification of the upright corner post 21, I have shown in Fig. 14 a corner post 36 provided with four grooves 31, each of which may receive therein a vertical key 3U. The covers of trim 33 of Fig. 14 are similar to the cover 35 of Fig. 13 and the additional walls which are initially installed or provision is made for their later installation are shown -by dotted lines and numbered 22.

Referring particularly to the construction around the doors and windows (see Figs. 9 to 1l) the vertical keys 4| are received in aligned grooves 23 in timbers 20. This permits the timbers 20 to move by reason of expansion or contraction and this movement will not be reflected in the position of the key 4|. A vertical frame member 42 (see Fig. l0) is secured to the key 4| which is received in said slot 23. This may be accomplished by providing in the vertical frame members 42 a slot 43 of suitable size and then nailing, gluing, or otherwise securing the key 4| to a frame member 42. On each side of the opening, the vertical trim numbered 44 in Fig. 10, the vertical upright 42 and the key 4| are 'secured together, and are slidable (by reason of keys 4|) as respects the timbers 23. A horizontal header 43 is supported by the vertical frame members 42 on each side of the door or window opening and positioned in spaced relation to the timber 2Q thereabove providing the space dll shown in Fig. l1. The extent of the space 41 will depend upon the maximum contraction possi-ble of the timbers 2l] and 'such space permits movement of the timbers il thereabove without changing the position of the header Q6. Horizontal trim i5 is secured to the header H6 and thus a door opening, provided by the trims it and 45, may maintain its position despite eX mansion and contraction in the timbers Ze. referably, the moisture content of the members di, 42, 45 and 45 is that which is best suited for the purpose. Also, preferably, such parts are treated with resin sealers obtainable on the market to waterproof and control the dimensions of such parts. In other words, it is an object to provide a door frame or window frame opening construction wherein the trim portions supporting the door or window will be formed of finished materials and treated so they will be waterproof and properly maintain their size to provide proper t of the doors and windows and at the same time t-o provide sliding connections between such trim members supporting the doors and windows and the timber members 2B forming the walls of the dwelling of this invention. While I have shown a type of window in Figure l, which is commonly referred to as a French window, it is well within the knowledge of those skilled in the building art to employ any type of window and modify the opening in accordance therewith.

As a space M is provided lbetween the header 46 and the timber 20 thereabove, means should be employed to seal the space thus provided. This may be accomplished by having the inside piece of trim 55 slidingly iit against the inner surface 24 of the timber 2B above the space 41. On the outside a flashing 48 provides a suitable weatherproof connection between the exterior trim 45 and the said timber 20.

The relative positions of the grooves 22 and 23 in the timber 20 will be determined by question of weatherproofne'ss and also strength. The closerl the position of the grooves 22 to the surface 2l, the greater will be the weatherproofness of the construction, and, at the same time, the more centrally the grooves 23 are positioned, the greater will be the strength of the corner construction.

Thus, in general, in this invention there is provided a plurality of timbers 2li which may be positioned in superposed relation to form the walls of the dwelling. By the use of the desired upright as shown in the drawing any number of walls may be erected to provide a suitable design of dwelling. Also, openings may be provided for windows, doors, and the like. The weatherproong between the timbers 20 is provided by the rough sawing of the surfaces I8 and also by the groove 22 (having a rounded cor ner) and the inter-fitting compressible square cornered key members 25. The timbers 2U are provided with a sliding it with the vertical supporting members at the corners and around the doors and windows so that relative movement between the timbers Qi) and the trim or corner posts, brought about by reason of expansion or contraction of the timbers 2S, will not eiect the position of the. corner supports as 2, 33, 56. Likewise, the relative position of the timbers 2li will not effect the position of the members 4l, 42, M, 45, and i6 which form the window frame and door frame construction openings.

Obviously, changes may be made in the forms. dimensions and arrangement of the parts of this invention, without departing from the principle thereof, the above setting forth only preferred forms of embodiment.

I claim:

l. In a device of the class described, a wall formed cf relatively moist timbers, each provided with a longitudinal V shaped groove, having a base which coincides with the base of the timber and which is rounded at the apex of the groove, disposed in superposed relation and with juxtaposed grooves paired to form in section a rectangular` opening with upper and lower rounded corners.' and a compressed rectangular and relatively dry key member disposed in said opening characterized in that corners of said key member have been compressed and conform to the configuration of said opening.

2. In a device of the class described, a plurality of superposed timbers forming one wall of a building the height of which varies with eXpansion and contraction, each timber being provided with a vertical groove in an end portion thereof, said grooves in said timbers being disposed in registering relation to form a continuous vertical groove; a second tier of superposed timbers forming another wall of said building the height of which varies with expansion and contraction, each of said last mentioned timbers being provided with a vertical groove in an end portion thereof, said grooves in said last mentioned timbers being disposed in registering relation to form a second continuous vertical groove; an upright support mounted for relative vertical movement as respects both of Said walls and being provided with a plurality of vertical grooves, one of which registers with the groove in the first mention-ed superposed timbers, and another of which registers with the groove in said second tier of superposed timbers; iloatingly mounted key members slidably joining the groove in said superposed timbers with a groove in said upright support and slidably joining said groove in said second tier of superposed timbers with another groove in said upright support, whereby expansion or contraction of said timbers of each wall causing change in the height of the wall is unrestricted and said walls are supported against horizontal movement; and a stay sup porting member secured to said upright support and preventing displacement of said support away from said superposed timbers and said second tier of superposed timbers.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2563703 *Dec 4, 1947Aug 7, 1951Bonney Lawrence SBuilding construction
US3979862 *Mar 21, 1975Sep 14, 1976Gibbs Bright & Co.Building structure
US3992838 *Jul 14, 1975Nov 23, 1976New England Log Homes, Inc.Insulated wall log
US4224772 *Oct 10, 1978Sep 30, 1980Country Log Homes, Inc.Window construction
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US7313890 *Aug 11, 2006Jan 1, 2008Pointblank Design Inc.Wall opening support system
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US7594370Jul 21, 2006Sep 29, 2009Pointblank Design Inc.Butt joint for logs in log structures
US7797896 *Oct 28, 2004Sep 21, 2010Andreas LanglitzLog-cabin type facade
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DE3703741A1 *Feb 7, 1987Aug 18, 1988Martin Dipl Ing KleinhenzConnection between the shrinkable and expansible logs of a log cabin and the log-cabin constituent parts having a different capacity for shrinkage and expansion
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U.S. Classification52/233
International ClassificationE04B2/70
Cooperative ClassificationE04B2/702
European ClassificationE04B2/70B1