USRE1209E - Improvement in journal-boxes - Google Patents

Description

'UNITED STATES PATENT OFFICE.

|MPRovEM ENT IN JOURNAL-BOXES.

Specification forming part of Letters Patent No. 30,128, dated September 25, 1860; Reissue No. 1,269, dated July 9, 1361.

DIVISION B.

To all whom it may concern,.-

le it known that rI, PA'InIeK S. DEVLAN, of Elizabethport, in the county of Union and State of New Jersey, have invented a new and useful Improvement inJournal-Boxes, of which the following is a specification.

My present invention relates to aA novel composition for the' bearing-surfaces of all kinds of journal-boxes, and has for its object the employment of paper-pulp, or any vegetable iibrous matter pulped, in combination with gypsum or soapstone, or other iine earthy 1na-tter,to form the bearingsurface ofjournah b'ixes.

It has been customary, previous to my in \cntion,.to make `the bearingisurfaces of all kinds ofjournal-boxes of stone, metal, or alloy by casting it in molds. I have discovered that any kind of vegetable fibrous matter reduced toa pulpy state and mixed with (about one-third its bulk of) plastcrbf-paris or any other fine earthy matter, and then dried and compressed, will constitute a composition which is admirably adapted to form the bearin g-surface of all kinds oijournal-boxes; and lmy present invention consists in a new composition for .journal-box bearing-surfaces, formed by mixing in a moist state any fibrous vegetable pulp with (about one-third of its bulk of) plustcr-of-paris, or other fine earthy matter, and compressing the whole .into a dry, solid condition, as hereinafter described.

To enable those skilled in the art to-make and use my present invention, l will describe the inode .in which I have practiced the same.

I take paper-pulp, or old paper reduced to pulp, or any fibrous pulp, and extracting sufficient moisture from it to have Iit in only a plastic state I mix it with aboutonethird'its hulk of plaster-of-paris, or any other fine earthy substance. While in aplastic state, I lill this composition into the boxes of which it is to constitute the bearingsurface, leaving a surplus or overcharge, and when the composition has beeolne dry I submit it (in the box) to a severe pressure, and compress its particles into a very solid condition.

'In another application led simultaneously with this, for makingthe bearingsurfaces ot journal-boxes of paper or other vegetable fibrous pulp, this method of forming a plastic material into the solid bearings of the box is fully illustrated, and since the Inode of forming the composition into the box forms 1:0

part of this invention, I need not more partiewhich I have found to be useful in giving to the composition a capacity to adhere to the I box or shell in which it is pressed; but I do not mean to limit myinvention tothe combining of gum with the other ingredients before mentioned.

It will be understoodv that I' contemplate the employment ot' any vegetable fibrous matterv to reduce to pulp and) mix with plaster; .and it will be further understood that I do not wish to limit myself to the use of plasterof paris, as any ne .earthy matter which is free` from grit and non-conductive of heat uill serve my purposes equally as well as 'the plaster, for, since the element of combustability has not to be considered in' the selection of the earthy element of my new composition, it is evident that any earthy matter possessing otherwise substantially the same properties for the purpose in view maybe silbsti-v tuted for the plaster-of-paris Without vdeparting from the spirit ofv my invention which rests in the idea of combining any vegetable fibrous matter in a plastic state with plasterof-paris or other line earthy substance, and compressing the mass into a solid condition. substantially as I have explained.

I have mentioned the proportions of the ingredients as being'about one part of plaster to two parts of brous pulp but it will bey understood that kthe exact proportions are not at all important,'and can be Varied without materially affecting the nature and properties of the composition produced, so far as its employment for the purpose stated is ooncerned.

The advantages of my new composition for all kinds of. bearings are as follows: It does not heat up by friction as other m-terinls or composition; it is exceedingly more durable than any kind yof bearing-surface heretofore employed, and its cost is almost nominal.

Having explained the nature of my invention and described its practical application,

' so that one skilled in the arti can make and use it, what I claim as new, and desire to se cure by Letters Patent. is'- Forming the beziringsurfnces of journalbox'es ot" :i composition of vegetable fibrous metterand fine earthy substance, substantially as hereinbefore described.

- In testimony whereofI have hereunto set my hand this 27 th day of March, 1S61.

P. S. DEVLAN.

Witnessesrl Jv v V WM. C. MCINTIRE 2 PETER DEVINE.

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