US279130A - chapman - Google Patents

Description

(No Model.) 2 Sheets-Sheet l.

No. 279,130. Patented June 12.,` 1883.

N, PEYERS. Pbmo-Limqmpher, wnshingfm uc.

(No Model.) 2 Sheets-Sheet 2. F. H. CHAPMAN.

GQPFEB MILL. No. 279,130. Patented June 12,1883.

[L (HI 747 es. v Inv/671307.

EL. a4' j?? WM View of the crank-arm.

- UNITED STATES y PATENT OFFICE.

FRANK H. CHAPMAN, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE CHARLES PARKER COMPANY, OF SAME PLACE.

COFFEE-MILL.

SPECIFICATION forming part of Letters Patent No. 279,130, dated June 12, 1883.

Application filed February 26, 1883. (No model.)

To all whom t may concern:

Be it known' that I, FRANK H. CHAPMAN, aV citizen of the United States, residing at Meriden, in the county of New I-Iaven and State of Connecticut, have invented certain new and useful Improvements in Coffee-Mills; 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 to which it appertains t-o make and use the same, reference being had to the accompanying drawings, i

and to letters or iigures of reference marked thereon, which form a part ot' this specification.

This invention relates to that class of coffeemills in which a conical runner is used within a conical ease or shell, the runner-spindle being provided with a nut for adjusting said run,- ner up or down, t0 grind more finely or more coarsely as desired.

In the accompanying drawings, Figure 1 .represents a vertical section of a coffee-mill embodying Ymy invention. Fig. 2 represents a plan view of the same with the cover open. Fig. 3 represents a detail view of the runner and its spindle. Fig. -i represents a detail Fig. represents a detail view ot' the adjusting-nut. Fig. 6 represents a detail view ofthe collar, hereinafter referred to, and Fig. fi represents an under view et' the sectional cover.

In said drawings, A designates the box ot' a coffee-mill; I5, the drawer; C, the metallic cast'- ing forming the top of said box; D, t-he hopper attached thereto by screws passing through its peripheral ilange or rim d,- E, a 4bridge countersunk in the top of said hopper, and provided at its middle with an upright tubu- .lar bearing, c,- F, a conical internally ridged or roughened shell, cast with said hopper, and communicating with it by means of an opening, j', in the bottom of. the latter; and C, a conical ruimer of cast metal, which is ridged or rough ened on its sides and turns withinsai d shell to do its grinding. with said runner, and extends up through bearing c, being provided with a shoulder, l1., which by contact withthe lower end of said bearing prevents said spindle from being drawn up too far through the said bearing. On the top of said bearing rests a collar, I, and on top of A spindle, H, is cast this collar rests the tubular inner end, J of a crank-arm, J, whereby the mill is operated.

The spindle H extends up through the said collar I and tubular part J of arm J, the part H of said spindle passing through the latter being flattened, as shown, (or of prismatic 'or irregular shap e,) in order that it may turn with the crank arm. The passage or opening j through the latter is of corresponding shape. The upper end, H2, of said spindle II is screwthreaded, to receive a nut, K,which holds the crank-arm, collar, spindle, and runner in place, and also adjusts the latter up or down, so that it will grind more or less finely as desired.

The cover consists of two sections, L L, which are pivoted independently, but at proximate points, and provided with toothed segments Z Z', which mesh together, so that when one section, L or L, is opened the other opens also. They operate together similarly in closing. u" Y lt is very desirable to insure regularity of running by providing means i'or causing the crank-arm, nut, and collar to brace each other. To effect this I form an annular iange, m, on the under side of the nut K, and a similar ange, n, on the upper end otl collar I, and make corresponding recesses o p, respectively, in the top and bottom ofthe tubular part J ot' crank-arm J. The ange m lits into recess o, and the iiange n lits into recess j), and these iianges prevent the crank-arm from swaying about, since they ail'ord it a more reliable bearing than it otherwise would have, and they prevent any independent motion ot' said tubular part J over said collar or under said nut. As said nut clamps said tubular part J ofthe crank-armdown against said collar and the latter down against the fixed bearing e, the interlocking parts ot' said nut and collar and said crank-arm brace each other very effectually, and turn together as one piece. Oi'eoursc the iianges may be on the tubular part of t-he crank-arm, andthe recesses may be in the nut and collar. The latter may also be in one piece with the fixed bearing c, or with a fixed cover for thecoftee-mill box. Said collar acts `as a support 'for the tubular part J of the same out of IOO , tical annular' flange n, with an external horizontal flange, n', on which rests the Ylower end of the tubular inner end, J, of erank-arm J. The cylindrical shape ofthe collar tends to make the pressure of thc collar on the bridge even and vertical.

On the top of the rim d of the `hopper l), at the front thereof, I form two slight protuberances, d cl2, and in the under side of the. coversections L L', I make notches or recesses Z2 l, which catch over said protuberances and hold the cover-sections in place, so that they Will not be accidentally dislodged. A stop, l", lon the top of said rim fl' iits into recesses in the contiguous edges of said sections, and prevents them from jarring together;

I am aware it is not new to use a flaring collar 'Without' flanges for the inner end of the crank-arm to rest von,.sa'id collar being supported` by an arch, and the other parts arranged substantially as I have descri bed. rThis, however, I do not claim.

I am also aware that covers have been ttastcned to the tops of boXes by notches or recesses catching over protuberances 5 that the form of cover shown herein is not new in coffeemills, and that such covers have been fastened by openings in them catching` over fixed protuberances. I do not claim these constructions, broadly; but,

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The cylindrical collar I, having at its upper end the vertical annular flange 'n and horizontal annular'flange n', in combination 4With crank-arm J, the tubular inner end of which is recessed to receive flange oz., and rests upon flange n, the runner-spindle H, bridge E, and nut K, substantially as set forth.

2. A coffee-mill comprising a fixed stop, l?, fixed protuberances d d?, and cover-sectionsvL L', recessed to receivesaid stop when they-arc closed together, and provided with notches or recesses -to catch over those protuberances, substantially and for the purpose Vset forth.

In testimony whereof l affix my signature in presence of tivo witnesses.

FRANK H. CHAPMAN.

,lV-itnesses DEXTER W. PARKER, RALPH A. PALMER.

Images