US 1787067 A
Description (OCR text may contain errors)
Dec. 30, 1930. H.' G, EISLER 1,787,067
FLOOR CONSTRUCTION Filed Jan. 19. 1929 Henry' E. Eisler l 35 invention.-
Patented Dec. 30,v 1930 'HENRY e.' erstma' orAwILMnTTr-i, ILLINOIS FLOOR CONSTBIUC'IIIONPk v Application iled January 19, 1929.` Serial No. 333,724.
` My invention relates in general to improvements in Hoor construction, and the object of the invention, generally stated, r is to provide a sound-prooi ioor which is particularly 5 desirable for apartment buildings andother places where rooms must be insulated against noises produced on the i'loor above.y
A feature of the inventionJis a floor 'construction comprising the usual sub-'hoor and hnished floor, together with means for preventing the transmission ot sound vibrations from the finished iioor to the sub-floor and thence to the ceiling of the room below. This is accomplished' in a practical and eiiicient i manner and without resorting to radical changes in generall designv which might'be objectionable to architects and contractors` An ancillary feature is a new and improved nailing strip or sleeper intended to be manu- '20 factured and sold for use in building soundproof floors. Thevforeg'oing' and other features of the invention will be fully described hereinafter, reference being 4had to the accompanying drawing, in which: l
Fig. 1 showsa section of a iioor embodying the invention Fig. 2 is an enlarged section taken on the line 2;-2, Fig. l;vl` Figs 3 and 4 are top and bottom views, respectively, of my improved nailing strip or sleeper; while V Fig. 5 is a sectional view similar to Fig. `2"'excep`t that it shows amodication of the 4 Referring to Fig. l, the reference numeral 3 indicates a portion of a licor joist. The floor joi'sts, as is well understood, 'extend transversely across the building, spaced perhaps 16 inches apart.- The drawing, Fig. l, is iragmentary,v and shows only a small portion oione'vjoist. The reference character 4 'indicates the sub-floor, generally made of rough lumber laid directly on the joists and nailed thereto'.l
In order to support the finished iloor, so called nailing strips or sleepers are provided.
These are laid on the sub-iloonpre'ferably directly over -the -joists. The drawing-shows a portion of onenailng strip 5, and a section of nnishedeooring e.' kThe nailing Strips lmay be about`2 x 2 inches in cross section, Vor
somewhat smaller, depending on how much space is required for the laying of conduit.
As will shortly appear, the nailing strips are of anA improved construction and form a principal part ofmy invention.
rOne nailing stripis shown in Figs. 3' an 4.H Fig. 3is'a top view, while Fig. 4 shows the lower side with sound insulators in place. As stated before 2 x 2 inch material may be used, out to standard lengths, 10 or k12 feet, or longer. Each strip isjbored and counterbored as shown in Figs. 3 and 2, the holes being spaced on l-inch centers. The spacing may, of course, be varied and a closer spacingshould be used in the case of nailing strips which are to form part of a Hoor subject to heavy strains. 'K n l The holes in the nailing strips are provided to accommodate my improved soundproofing means, which `will now be explained, reterence'being had especially to Figs. 4 and 2. As shown in Fig. 4, each hole in a nailing strip has inserted therein a cushioning inember 7, of sound-proofmaterial.- The members constitute sound or vibration insulators.
lOne of the insulators 7 is shown quite clearly j half way through the nailing strip. Accom- :panying each insul'atorf7`is a washer-8, also composed lof vibration yinsulating material. The washers S'are of the proper size tolit snuglyV inthe recesseswhich have been formed in the upper ysur'faceof the nailing strip by the counter-boring operation.
The cushioningmembers or insulators 7 and ythe washers 8 may be made of various sound-proof materials. vI prefer, however, to use a good lgrade of rubber, what is known as tire tread stock, and form the parts by vulcanizing in molds. The parts thus formed are inexpensive, are convenient to handle, and atthe same time they form' an idealcushioning means for preventing the transmission of sound vibrations.
In building a floor embodying my improved sound-proofing means, the sub-floor is laid in the usual manner, When the carpenter Will be ready to proceed With the nailing strips. These may be nailed down to the sub-door, oifie'fover each joifst; The process lof laying my improved nailing stripV is not especially complicated, but it may, nevertheless, be briefly explained. ',Afternialin'g certain that an insulator 7 is inserted in each of the holes, the strip is placed in vtlielproperY position on the sub-floor, as indicated in Fig.
1. The Washers 8 may-now be placed inthe recesses on top of the strip, if tlieyhave not ,previously been inserted. y The strip may now be nailed down, one nail being used at each point Where an insulator is located. Before V driving a nail, care should be'talren to thread on an iron vva'sher such as 9. The nail may then :be passed through tlie'central openings in the Washer and insulator and drivenliorne into the sub-floor, as indicated 1n Fig. 2.
vEach nail should be 'driven i'n -tiglit enough to slightly compress the associated Washer 8. The nailing strips 'hav-ing all been placed as described in the foregoing,the job is vready i for the finished flooring, which is laid on the nailing strips and nailed doivn piece lby piece in 'the usual manner.
The completed floor is proof against the transmission of sound vibrations because the inished floor and the nailing strips 'to- Which it is attached are -fully insulated 'from the sub-licor. The entire Weight of the upper floor and objects'supported'on it is carried by the insulators 7, Which form the principal insulating' means. The nails such as 10, which secure the nailing strips to the subfloor and Which Would have a tendency to conduct vibrations through to the sub-floor, are 'prevented from-having this undesirable effect bythe Washers 8. Thus, as stated, the
'finislied'loorand nailing strips are-entirely insulated, even tho-iigh the latter are securely nailed to the sub-floor. Y
In carrying out my invention, I lcontemplate fabricatingthe nailing strips at a Wood working mill, Wlier'ethe'y can be conveniently bored and counter-bored by machinery, and ,put up in bundles for sale 4to the trade. The i'iaili'ng stripsrmay be put ont fully lequipped rwith -insulators 7 and Washers 8 all assembled i `in'place if desired. AThis enables the-nailing :strips to be nplaced AWith-a yminimum 'ofex-tra labor infact, if 'furnished complete the nail- `ingstrips can be laidpraetically as :fast as plain uni-nsulated-strips.
Fig. v'5 shows afmodification ofthe 'invention `vvhich'is desir-able under certainconditions. The p arts shown iniFig. 5 correspond generally to those shown inFigfQ. and-.hence .anrextended description Will not be necessary. Itfm-aybe J.pointed .-out, however, .that
the insulator 7 ofFig. 2 is replaced by an insulating member 17 in which the shank portion is omitted, While the insulating Washer 8 is replaced by an insulator 18 which is provided with a shank. In other Words, the shank portion, which positively separates the nail from the sides of the opening, ismoved 4from the .lower-t0 theupper insulator. Insulators such as 8 can be used along with the ii'isul'ators 17, but more care has to be exercisedin 'driving theiiails accurately.
desireto includey and'have protected b y Let-v tei's Patent all `forms of my invention which come Withinthe scope ofthe appended claims. f AWhat isclaimed ,-is: Y l
1. The combination, with afnailingstrip,
of means for 'insulatingesaid strip from the sub-floor and for attaching said strip to the sub-floor, said .means comprising a perforated insulator,lying'between.the stri `andthe sub-floor and having a portionemEedd'ed in theV strip,: a perforated .insulating Washerembedded in the said strip near the upper surfacefthereof, and a nail passing through the perforations in said Washer and lsaid insulator and driven'into the sub-floor.
2. 'floor construction coinprising a subfloor, nailing* strips laidon said sub-floor, a vseries of spaced vibration insulators inserted between each nailing-strip .and the sub-floor, securing devices extending through each nailing strip to the sub-floor at `.the points -Where said vinsulators are located, .means for Vinsulating said devices from thenailing strips,
Y and a top'ioor laid on said nailing strips.
3*.v .A floorl .construction A"comprising asubfloor, nailing strips having openings therein, nails having insulated heads Lpassing through said openings and driven Ainto the sub-floor, an insulator concentric with each `nail and Vpositioned between the associated nailingr strip `and *the sub-floor, and a top floor laid on said .nailing strips. u
t. As an article ofrn'anufacturda nailing strip having a series of y holes extending through it 'from top to bottom, lsaid :holes being counter-bored to form recesses VVonthef- .top side of 4saidst'rip, insulating Washers inserted in said recesses, and :supporting vinsulators having cylindrical rShanks 'inserted '1n said. holeson the bottomof said-strip.
Y 5.`'lr`he combination, fvvith fa 'nailing .strip adapted to be nailed to a Support, of an insulator, said insulator comprising a baseportion for supporting'the nailing strip and a shank portion adapted to encircle a nail and insulate it from the strip.
6. The combination, with a nailing strip having holes therein through which nails may be driven to attach the strip to a support, of a pair of bushings Jfor each hole to insulate the Strip from the nails, one bushing of each pair serving also as a support for the strip.
HENRY G. EISLER.