Mounting bracket fob instrument
US 2440324 A
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C.A.BLAKESLEE MOUNTING BRACKET FOR INSTRUIENT cAsas Filed Doc. 8, 1943 April 27, 1948.
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Patented Apr. 27, 1948 UNITED TA ES PATENT orF cE momrrmo naszgsfg oa msrnosrss'r I w Clinton A. Bhkealee, 311mb!!! Coma, aasignor to'lhe eerporatlonof Application December 8. 1948, Serial No. 613,413
1 Claim. (CL 248-27) The invention relates to a mounting bracket adapted more especially to the mounting of an instrument case with respect to a panel for the same. The customary manner of securing an instrument case to a panel either for front-ofpanel mounting or for flush mounting has been. in the former instance, through the use of perforated lugs on the case, which is usually a casting or a stamped or fabricated case. the lugs being bolted to holes provided in the panel. In the flush arrangement of mounting. a broad flange is provided at the front of the case and has holes therein through which to bolt the case to the panel through corresponding holes drilled in the panel near the edge of the "cut-out or opening of the panel, the lugs then being omitted. Generally, the two types of mounting necessitate actual differences in the case as cast or otherwise fabricated.
An attempt was made (see U. 8. Patent #l,859,- 8'72 granted May 24, 1932, to T. R. Harrison) to obviate the requirement for different types of fittings by providing a removable lug which may be located on the case in any one of several manners adapted for three different types of mounting. The arrangement, however, is suitable only for the so-called "wall mounting. and for the flush mounting of the case special and different fittings are required. Thus, two distinct types of fittings must be furnished in many instances when shipping an instrument, as it is not known beforehand which type of mounting would be adopted when the instrument is to be installed. Only one set of the fittings would then be used, and the other discarded; or, having been supplied originally with a set for a particular mounting. should the customer subsequently desire to change to the other type oi mounting, he would require diflerent ilttings.
An object of the present invention isto provide a novel mounting member or bracket whereby to secure an instrument case to a panel alternatively flush with the face thereof or upon the front of the panel to project from the same.
A further object of the invention is to provide a mounting bracket which is suitable for use with either a stamped or fabricated sheet metal case or with a cast or otherwise constructed case.
A still further object of the invention is to provide a bracket member whereby the case may be displaced from the edge of the cut-out" or opening of the panel within which the case extends and whose edge is frequently irregular or rough: also. to obviate the necessity for drilling of bolt or like holes about the "cut-out which materially weaken the wall portion surrounding the mounted casing.
Another object of the invention is to providea-simple mounting member wherein, when utilized for mounting the case upon a panel or wall, the arrangement is such as to distribute the stress between the periphery of the case and the panel or wall and to provide a displacement or space between the hack of the case and said panel or wall to accommodate screw and bolt heads or other projections on the case, as well as irregularities on the panel surface.
Still another object of the invention is to provide a bracket which, when installed to mount an instrument case flush with a panel, cannot twist or turn.
A further object is found in the provision of a mounting bracket which not only supports, but reinforces, the case of an instrument to which it is applied.
The invention has for an object, also, to provide a mounting bracket which, when utilized to mount an instrument case substantially flush with the panel, will remain invisible from the front of said panel.
A further object of the invention is to provide a strong,'simple, and relatively inexpensive bracket member suitable for effecting the desired mountings.
In carrying out the invention, the novel bracket is constructed in the form of a T-element with outer surfaces of its flanges flush with each other or lying in the same plane, the intermediate portion of the T-element extending at right angles to these flanges and having a plane surface associated with an inner surface of one of the flanges parallel to the common plane of the outer surfaces, the plane surface of the intermediate portion being juxtaposed to said parallel inner surface and normal thereto. The two flanges, one of which preferably is longer than the other, as well as the intermediate portion, are perforated to receive respectively securing members whereby to mount an instrument case on a panel or wall. The construction is such that the outer surfaces of the flanges, which lie in a common plane, may contact alternatively the outer surface of the instrument case or the outer face of a panel or wall for attachment of the bracket thereto. In the former instance, the intermediate portion retains a securing member which is in the nature of a set screw designed to contact the inner face of the panel and draw the inturned edge of a case flange into contact with the outer face of said panel to clamp 3 position substantially flush of t e panel. One of the into the panel opening for the said flanks of the case and between the periphery of said case and the prevent turning or twisting of installed. the same being atd periphery of the case through in the shorter of the flanges. l'ior mounting th wall to project outwardly therefrom. both the intermediate portion and one of the flanges are attached to the periphery of the ease. whereby the corner of the same is embraced and reinforced, while the other one of the flanges is secm'ed to the panel.
The nature of the invention, however, will best be understood when described in connection with the accompany! drawings. in which:
Figs. 1 and 2 are vertical sections of a panel,
with instrument case and bracket indicated in elevation, showing respectively an instrument case mounted substantially flush with the outer face of a panel or wall-and projecting therefrom.
Figs. 3 and 4 are fragmentary longitudinal sections, on an enlarged scale, illustrating the manher of seeming the instrument case according to the showings indicated in Figs. 1 and 2. respectively.
I'ig. ii is a similar view illustrating a modiflcation in the flush type of ease mounting by means of the novel bracket.
Fig. 6 is a perspective view of the novel mounting bracket, and Fig. 7 is a vertical section thereof.
Referring to the drawings, ll designates a section of a panel or a wall member upon which an instrument case II is designed to be mounted either flush with the front face I: of the panel. as indicated in Fig. 1' of the drawings. or to project outwardly from this face of the panel, as indicated in Fig. 2 of the drawinss. In accordance with the invention, this is effected by means of a novel form of mounting bracket, indicated more particularly in Figs. 6 and 7 of the drawings, the number of brackets utilised depending on'thesiseofthecase,fourordinarilyservingthe The novel bracket is in the nature of a 1'- element having the flanges ll and II with intermediate portion ll extending at right angles thereto. The outer surfaces It and II of the flangesareflushorlieinacommonpiane: and one of'the flanges, as the flange II which also is preferably shorter than flange II, is provided with a perforation or hole 20. Similarly, the flange ll is provided with a perforation II but in this instance the perforation is somewhat ecaseonthefrontfaeeofthe' guests 4 mountinntheouterfaceofthepanel. 'lhlsis more cleariyindicatedlnl'ilsdandbreewtively: andsuitablesecuringmeansaroprovided toretainthebrackettothecaseandpanehin accordance with the location of said case relative to the panel. Thus, a combined nut and bushing ilmaybeprovidsdinthecasewallattheforwardportionasbyst'sking,soidering,orbrasing thesamethereto.andthenutisthreadedto receive a cap bolt II passing through the perforation it of the flange II, Fig. 8. in this embodimentoftheinvention.theflange ll isnotsec'ured to the case wall but extends outwardly through an opening I; of the panel beyond its outer face I! substantially to an upturned and rearwardly directed flange II of the instrument. This not only reinforces the case wall but will avoid any twisting or shifting of the bracket particularly insecuringitsflange lltosaidwall. Itwillalso serve to displace the outer surface of the case wall from the edge of the opening or "cut-out" it of panel which may be irregular or rough, and any proiectiona from the case wall may be accommodatcd.
The intermediate portion i1 projects outwardly then from the flanges substantially parallel to the inner face 84 of the panel and. by means of a set screw Cl fitting the threaded opening II. is caused to engage said face 88 and draw thereby the flange 13 into contact with outer face I! to clamp the case to the panel with the said case substantially flush with the outer face if of said panel.
Or, as indicated in Fig. 5, particularly when the case is of cast metal or is molded, it'may be so constructed that no threaded openings are required in its wall for retaining the bracket member thereto. Thus, the case I is shown as provided with a series of pockets orrecesses ll, openattheouterendandarrangedintheouter a surface of the wall, said recesses extending from elongated and countersunk at the outer surface II, as at 22.
The inner surface 13 of the flange I! is substantially parallel to the outer surface II and at right angles to the juxtaposed surface ll of the intermediate portion ll of the bracket. This intermediate portion is also provided with a perforation 2! which is threaded. A pair of reinforcing integral webs II are located at the sides of the intermediate portion to connect the same 'with one of the flanges, in the present instance the shorter flange il.
In adapting this bracket in the mounting of an instrument case in either of the positions indicated in Figs. 1 and 2, the two flange surfaces It and II will contact. in the flush mounting, the outer surface of the casing. and in the projecting the inturned flange l2 inwardly a suiilcient distance toaccornmodate thebrackst flanges II and it which seat with the inner end of the former flange abutting the back wall 0 of the recess..
when screw fl is then turned in the intermediate portion II to clamp the flange ll to panel II, the tendencyforthebrackettoherotatedlna clockwise sense will cause the flange portion It to be brought into forcible cnsuesnent with the inner edge of the opening 32 in the panel, while at the same time sufllcient stress will be exerted aiainstwalln attheinnerendoftherecess ii to holdthe bracket flrmly in its location in said recess without other means of attachment to the case. and also through the clamping action onflange Q2 toflrmlylocatethecasewithrespect to the panel.
Whenitisdesiredtomountthecaseonthe panel to project outwardly therefrom, as indicated in Fig. 4-. the flange II and the intermediste portion II are attached over the rear of the case, the portion H by means of a further combined nut and bushing ll attached to the case and cooperating cap bolt Ii, the latter preferably being "undersiae" so as not to engage the threads within the opening 28: and the flange it by an additional combined nut and bushing 82 attached to the rear of the case and a screw II, the head of which fits the countersunk portion 22. The elongated conformation of the countersunk opening II provides a certain tolerance in spacing between the part I! and the flat perpendicular surface of the case I I, whereby is eliminated the need for precise dimensioning between the same. Flange ilissscureddirectlytothefrontfaceof the panel II by means of a bolt ll and nut is. In this instance, also. the wall of the case will be displaced by the interposition of the flanges from the outer face i! of panel ii to accommodate any irregularities or proiections thereon; and at the same time, the flange it and the intermediate portion i'l, angularly embracing the corner of the casing, will provide substantial support and reinforcement therefor.
The novel bracket member therefore serves for either type of mounting so that it is necessary to furnish merely one type of bracket member when shipplns an instrument. and no waste is involved in the event that a change in the manner or mounting is subsequently desired. The said bracket is of simple construction. strong and relatively inexpensive to manufacture. and is suitable for use with either the cast type of case or the stamped or fabricated type of case. In the former, it will be necessary merely to drill and tap the case at the desired locations, or provide recesses therein; and in the latter, it is preferred to reinforce the wall, for example, by means of the combined nut and bushing hereinbefore de- I claim:
The combination with a panel provided with an opening, and an instrument case adapted for mounting within said opening. said case havins a front upturned flange: of a mounting bracket forsecm'ingthecasetothepanelintheopening thereof substantially flush with its outer face. said bracket comprising a 'r-element with oppositely directed perfortted flanges and an intermediste ortion at right angles thereto and l 6 provided with a threaded perforation, the outer surfaces of said last-named flanges lying in a common plane and the inner surface of one of the flanges in a plane parallel to said common plane, the inner and outer surface of the one flange being adapted to fit in the panel opening between the panel and the case and extend forwardly of the face of said panel to the flange of said case, the other flange of the bracket being adapted to be secured to the case. and a screw adjustable in the perforation of the intermediate portion of the T-element to engage the inner iace of the panel and draw the case flange into contact with the said outer face of the panel when the T-element has been secured to said case.
CLINTON A. BLAKESLEE.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS