US1538879A - Pyrotechnical device - Google Patents

Description

Maize, 1925. 1,538,879

7 M. M. ADLER PYROTECHNICAL DEVICE Filed April 17. 1923 Patented May 26, 1925.

UNITED SAES AENT PYROTECHNICAL DEVICE.

Application filed April 17, 1923. Serial No. 632,664.

To all whom it may concern:

Be it known that I, MILTON M. ADLER, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Pyrotechnical Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same, reference being had to the accompanying drawings, and to characters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in pyrotechnical devices in the nature of a detonating firework or fire-cracker of the general type or kind shown and described in my prior United States Letters Patent No. 1,441,551, dated January 9th, 1923.

This invention has for its principal object to provide a detonating fire-work or firecracker which is safe to handle, which will not fly apart when set off so as to endanger the eyes or person of the user, or entail risk of igniting fires, and which is constructed to produce, when set off, a series or inter mittent succession of detonations, rendering the same of pleasing and interesting efiect, and providing a fire-work or fire-cracker which will operate for a comparatively long time after it is ignited.

Other objects of this invention, not at this time more particularly enumerated, will be clearly understood from the following detailed description of the same.

With the various objects of this invention in View, the same consists, primarily, in the novel detonating fire-work or fire-cracker hereinafter set forth; and, the invention consists, furthermore, in the novel arrangements and combinations of the several devices and parts, as well as in the details of the construction of the same, all of which will be hereinafter more fully described in the following specification, and then finally embodied in the claim appended thereto.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1 is a perspective view of the complete fire-work or fire-cracker, made according to and embodying the principles of the present invention; Figure 2 is a vertical cross section through the same; Figure 3 is a perspective view of the detonating element removed from the casing; Figure 4t is a veror box,

Figure 6 is a similar View showing a modified form of the detonating element.

Similar characters of reference are employed in all of the hereinabove described views, to indicate corresponding parts.

Referring now to said drawings, the reference character 1 indicates an outer casing the upper wall of which is provided with an opening 2. Said casing or box 1 is provided at its opposite ends with end-flaps 3 provided with tuck-fiaps 4, whereby the ends of the casing or box are normally closed. Provided in said end-flaps 3, or at other points in the sides of the complete casing or box, are a plurality of ventilating perforations 5, which permit access of air into the interior chamber 6 provided by the casing or box. The said casing or box is preferably made of comparatively heavy paper or light card-board, or of any other suitable material.

The reference character 7 indicates a solid disc-like body or lozenge of pyrotechnical composition adapted to produce intermittent detonations when ignited. A composition suitable for the production of the disc-like body or lozenge 7 comprises a mixture of gum-arabic, carbonate of magnesium, white phosphorus, red ocher and potassium chlorate. In this composition the phosphorus and potassium chlorate are the combustible and detonating or explosive elements which are, in the mixture, separatedzby the carbonate of magnesium and the inert filler formed by the red. ocher, the gum arabic being the binder. composition is mixed together and dried in disc-like or lozenge form and then ignited the combustion thereof will be comparatively slow, and will be accompanied by intermittent detonations as the particles of potassium chlorate are ignited. It will, of course, be understood that I do not limit myself necessarily to the use of the particular detonating composition above described, since I may employ for the purpose any other pyrotechnical compound known to those skilled in the art which is adapted to produce when ignited a slow combustion accompanied by intermittent explosions or detonations. After the disc-like body or loz- When this a enge 7 of pyrotechnical composition is formed and before the same hardens I attach thereto a fuse-element 8, one. end of which may be imbedded in the disc-like body or lozenge 7 as shown in Figures 2, 3 and 4:. If desired the disc-like body or. lozenge 7 may be wrapped in an adhering covering of thin paper or the like 9, as

shown in Figures 2 and 3, whereby undue disruption of thebody or lozenge 7 is prevented during the combustion thereof. It

will-be understood, however, that said cover-ing ofpaper orthe like 9 may be omitted if desired, as'shown'in igure 4:. Instead of imbedding the end of the fuse-element 8 in the body'or lozenge-7 as heretofore mentioned, I may wrap the said bodyor lozenge in the covering of 'paperor the like 9, and then attach one end of the fuse-element 8 to the exterior surface thereof by means of.

an adhesive '10, such as dextrine or other suitable gum, as shown n Figure 5; or I may omit the'paper covering 9, and attach thefuse-element 8 by means'of the adhesive "10 directly to the-surface of the body or lozenge 7 as shown in Figure 6; and infact I may attach said fuse-element 8 operatlvely 'to the body or lozenge 7in-any other manner found convenient or desirable.

After the combustibledetonating body or lozenge 7 with the fuse-element 8 attached thereto is prepared, the same is inserted in the casing or box 1, with the free end of said fuse-element 8 projecting outwardly through the top opening 2, 'and 'then the side flaps 3 of the casing or box=are closed, whereupon the device is ready for use. In

operation, the free end of said fuse-element 8 is ignited and burns'down until'the combustion thereof is communicated to the body orloZenge 7, whereupon the latter'b-urns and gives off the intermittent detonations characteristic thereto, and which will continue for a'comp'aratively long time. Air't-o support thecombustionof the body or lozenge 7 will circulate through the interior 6 of the box'or casing 1 finding access thereinto through the perforations 5provide'd in the sides of "the casing and through the opening 2 inthe top thereof. The; detonatingbody or lozenge 7 tends to disrupt more or less during the combustion thereof, but nevertheless the disrupted or separated particles breaking off from the body or lozenge under the explosive effects accompanying combustion cannot fly about promiscuously or escape from the enclosing casing. It will therefore be quite evident that the device is unusually safe for childrens amusement since there is little danger ofscattering particles of fire or smoldering fragments burning the child, igniting its clothing, or objects in the vicinity wherein the device is set ofl.

Lam aware that some changes may be -made in the arrangements and combinations 'of the parts making up the device, as well as in the details of the construction and composition of the same. without departing from the scope of this invention as set forth above and as defined in theappended claim.

Hence, I do not limit myself to the-exact arrangements and combinations of the various devices andpartsyas described in the foregoing specification, nor do I confine myself to the exact details of the construction of the said parts as'illustrated in the accompanying drawings.

A pyrotechnical device, comprisinga casing, adapted to provide a hollow enclosed interior, a lonzenge of detonating pyrotechnical composition loosely disposed within said casing, adapted to produce inter- 'mittent-detonations when ignited a fuse-element havlng one end affixed to said lozenge of pyrotechnical composition, said casing having an opening in the top wall thereof through which the free end-of said fuseelement may project exterior-1y from said casing, and the side walls of said casing having ventilating perforations to admlt air into theinterior of said casing.

In testimony, that I claim the invention,

set forth above I'have hereunto set my hand 'this20th day'of -March, 1923.

' MILTONM. ADLER.

Witnesses L GEORGE 'D. RICHARDS, 7 :EVA E. DnsoH;

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