US1635545A - Protective cover for breathing apparatus - Google Patents

Description

1,635,545 A. B. DRAGER PROTECTIVE COVER FORBREATHING APPARATUS I July 12, 1927.

Filed Nov. 5. 0. 1,925

' fis I ATTORNEYS Patented July ALEXANDER ennlvnennnnlienng-or 'VILUBECK, GERMANY,

PROTECTIVE oovnn ron BREATHING nr'rnnaros.

Application filed November 30, 1e25,, Seria1.No.72,144 and. in Germany Deteabaf1, 192i. i

yThis invention relatestobreathing apparatus, and more particularly to a protectlve .coverior such apparatus or parts thereof. I

, A protective cover or shield for breathing apparatus or parts thereof has the dual function of not only protecting the apparatus covered but also ventilating.and coolr ing such apparatus by permitting atmospheric or external air toipass through the said cover and to flow aroundsaid apparatus.

It has been proposed to use protective covers or shields which are either perforated or punched, i. e. provided with slits or openings as in grids or lattice-workf The disadvantage. of these covers is that they permit cooling and ventilation of the apparatus at the expense of the protective efiect against external injuries. This loss of protective efi ect means that parts of the apparatus are exposed to external agents. For instance, in the case of a nail protruding from timber worker a sharp point of a stone projecting from amine wall, it is possible that the sharp end of either the nail or the stone may pass through one of the apertures I of the protective cover, and injure or punctur-e parts of the apparatus adjacent to said cover. 7 v

The object of this'invention is not only to eliminate the disadvantages of known types of protective covers but also to provlde advantages which will be pointed out hereincooling apertures such that-a sharp pointed object cannot penetrate into the interior of the apparatus. This protection is eflected by disposing the metal or material forming the said cover so that the cooling apertures are transverse to said cover, and that asubstangered, 1. e. the p1O1GGt1011Sd21IlTOWS a are tially blank wall protects the said apparatus or parts thereof. Consequently, sharp oh- I jects merely strike this blank protecting wall without penetrating the apertures and causing any injury to the internal apparatus.

The invention will lee-best understood from the following description of several illustra tive examples thereof taken in conjunction with the accompanying drawings forming a part of this specification, and, in which;-

Fig. 1 shows a rear elevation of an embodiment of this invention in the form of a hinged cover adapted to protect the carewe: shown 'in Fig; 1

Fig.4; shows a vertical section taken on line of Fig. 3; Q Fig. 5. shows, a horlzontal section takenon' Fig. 6 is a view similar tothat of Fig. 3

showing a modified form;

Fig. 7 is a vertical section vtakenon the line 77 of Fig. 6;

Fig. 8 is ahorizontal section taken on the line 88 of 6.

Similar characters of reference designate similar parts in each of the several views.

The reference character 0, as shown in Figs. 1 and 2, designates a hinged-cover which is made from-a piece of suitable sheet material, suc'has sheet metal, and is adapted to be fastened to a breathing apparatus to 1 protect the cartridge filter; The main body a of said cover is provided with a pair of hinges or fastening means H and a plurality ofparallel cuts a arranged inlrows a and a In'the drawing seven of these rows are shown, but obviously any suitable number of rows with any desirable distance therebe tween may be employed depending upon the particular conditions. tions of metal between adjacent cuts are The alternate porbulged into projections. 00 which form, with j the rest of the sheet, apertures oropenings a transverse tosaidcover. Thesepro ed tions mayhave any desirable shape such as an arched section or a. rectangular section,

the arched section being shownin Figure 4...

The strip or portion. of metal a between said projections remains in the plane of the metal sheet a. In the illustration in Fig. 1,

the projections in alternate. rows are'stag I the projectionsa to increase the ventilating or cooling effect,

the transverse openings may be enlarged by further vaulting or archlng the edges a of In the form shown in Fig. 6, the transverse -apertures have been made still greater by bulging the intermediate strips a in W'ardly to form projections 0 The transverse apertures a formed-b the said'projections a? and a may be clearly seen in 7. By this arrangement, the area of'the transverse apertu'resis practically doubled, and the ventilation afforded thereby'greatly improved; It is to he noted that this type of cover provides increased ventilation to the coveredpart'of the apparatus Without diminishing or detracting from the protective efi'ect to said apparatus.

VVhi'le I have illustrated and described preferred forms of construction for carrying my invention-into effect, it is understood that variations in embodiments may be made Without departing from the scope and spirit of the invention.

I claim: a A protective shield for a part of a breath ing apparatus, comprising'a metallic sheet forming a hinged cover adapted to fit over

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