US69008A - Pr a nois mclaughlin - Google Patents

Description

@teiten gisten gianni @Hita FRANCIS MCLAUGHLIN, er nos'rolv, Musselo nnsufrrs Letters .Patent No. 09,008, dated September .17,"1867, i

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TO'ALL wnoM 1r MAY ooNenRN:

y `Be it known that I, FRANCIS M'oLAUGIILIN, of Boston, in the county of Suolk, and' Stateof blassaehusetts,` i have invented an improvement in Brushes; und I'do hereby declare thatthe following, taken inconnection with the drawings which accompany and form p nrt of this specification, is a description of `my invention, suffit fieient to enable'those skilled in the art to praetise it. Y( i This invention relates to that ,variety of brushes in which the bristles and handle are confined together by a fcrrule, or by a binclingm'he or string, afamiliar example of such arbrush beings. honse-pnintcrs Iconnnon brush for paints and varnishes.

Metal, when used either as a ferrule or ring, or as a binding-wire, is objectionable, because of its tendcney` to corredo, and when a wooden handle is used in connection therewith there is no elasticity in the bindinginetalf:

te follow the shrinkage of the woodeuhandle and to keep the bristleselosely confined to such avhandle. When l strinr or cord "is used to bind the bristles to the handle, moisture censosA the string-or cordto shrink, feiten to such extent es to break the cord :1sundcr, rand when a wooden handle is used,` (andthe use of` wood for handles is more common than the use of any other substance in most bristlebrushes,innd for mostpnrposes isthe preferable materia-1,) the same moist-ure which causes shrinkage of the binding-stringar or cord euuscsthehandle] to swell, thus increasing the liability of the binding to burst or breek.' i

New, my invention consists in making use of vulcanized rubber, or compounds with rubber vulcanized, in` l the form ofa ring or ferrule, for binding and coniiningthe bristles of the brush between the ring or ferrule und the brush-handle. The process of vulcanization of the rubber or the rubber compound should be` carried `to such an Y extent that the ring or fel-rule, while so hard as to come under the classification of hard rubber, will not `have all its elasticity destroyed, it being desirable to have the ferruleexpand orstretch a little upon the driving of `the wedge-,like handle into and through the centre of the body of `the bristles, so that if the handle shrinks, theK fel-rule, by virtue of its slightelastie property, will follow sue-l1 shrinkage, and will continue toi confine the loi-,isf tles as closely as before the shrinkage.

The ferrule when mudo of the vulcanized material is not affected by any thermal changes to which in use bristle brushes are ever exposed, nor do `hydrometrie changes aieet such ferrules in the least, nor arerthey 'l oxidizablel I Round brushes and brushes of `a considerable degreebf latness maybe thus made, andthe' tops `of the bristles are scared with a het iron, 'as usual, to prevent them from working downward in the ferrul The drawing shows partly in section and partly in elevation a brush embodying my invention. "lhe ferrule,

which is marked a, is made plain on its surface usually, and is Vof rubber, or of rubbergcompounds vulcanized to such an extent as to be hard, and yet preserve a slight ldegree of elasticity. f 6 represents the bristles,` and l 'e the wooden handle, which, being` of wedge-like form, is driven through the centre of the massief` bristles inserted in the ferrule till the butt of the wedge is about on a line with the lower `edge of the ferrulc.` i

I' claim'ia brush, made with a ferrule of' vulcanized rubber or its compounds, substantially nsdescribed` i FRANCIS McLAUGllLlN,` Witnesses: 3

J. B, Cnosnx', l).` IL L.-rri.,n`:n.

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