US176971A - Flmprovement in grates - Google Patents

Description

J. A. LAWSON.

GRATE.

Paenea'm'y 2.187'6.

N. PEIiRS. PHOTO-L THOGRA PH jl Toall whom ttgmayconcm which- `umnnsn:(fLAwsoN,f:orfrnor, NEw YORK.

Specification forming part of vLetters Patent No. 1765971, dated May 2, 1876; lapplication filed- 4 Febrnary', 187 6.

Be it knownthat I,`JA1uEs ALte/son, of

V``Troy, in'thecountyof Rensselaer and intle State of N ew' York, have inventedcertain new anduseful Improvements in Grates for Stores; anddo hereby declare that the'follou'ing is a full, clear, and exact' description thereof, ret. ere'nce being had to the accompanying drawings, making apart of thisfspecification, in

Figure l is a perspective View of the -main e j or1 supporting ggrate, supplenental grate, and i i grate-t'rame,,as combined for use. i ``l`igs'.4 2, 3, and 4 arelike views 'offs'aid parts separated from each other; land Fig. his a perspective view of the engaging portions 'ofthe' detachai ble handle and snpplenental'grate.

'Letters' 4of. like name and kind refer to like partsi each'of the figures. i

The design of my inve'ntion'is to increase theefticiencyof stoive-grates, and render more easy the removal of ashes and clinker; to which i end it consists, principally, in; tvhecon'struction of the grate-frame, by mean'sflofj which a horizontally-revolving `vmain grate and a' horizontally-sliding supplemental grate are supported in position for operation, substautially as is hereinafter speeified.

It consists, further, in a circular grate con- `structed with an open center, and having a vibratory motion around its axis', in combination with a lower supplemental grate, which' slides horizontally upon or within' parallelways that are attached to or 'upon part of the supporting-frame of said uppergrate, substantially as and lfor the purpose hereinafter shown.

It consists, further, in the peculiar-construction ofthe handle or bar for operating the supplementalgrate,and its combination with' the same, substantially as and for the purpose hereiafter set forth. l

It consists, finally, in the neans employed for supporting in position the operating-bar `of the supplemental gratewlen the ash-pit door is opened, substantially as is hereinafter shown and described. 4

In the annexeddrawings, A represents the main portion of the frame of my grate, which part is formed upon a circular line, and has secured to its lowerI side two straight bars, AI

'in a line'passing from front to rear. distant'points wit-hi the' circular portion A and A', tlat arearranged in parallel l ies,-and

extend vfroV the rear inner edge of said part A forwardto a point conside'ably in advance of itsfront outer edge. v Between the bars AI and AI the front portion of the cirenla portion'A of the' frame is removed, and within the inner upper side of each bar is formed a right-angled rabbet, a, that receives one edge ot' a grate, B, and in connection' ``with the -opposite rabbet forms bearings for and within which said grate may be moved horizontally At equiof the grate-frane are journaled three rollers,

a' and a', each of which revolves upon an axis that is horizontal, and placed inline radially? with the a`xial center of said portion A, and

upon said rollers is placed a grate, O, that'has aannular form in plan view, and is serrated around itsl inner edge, the arrangement being 4 such as to enable' said grate to be rotatedin a horizontal plane around its axial center.

`As thus coustructed and combined it willv be seen that when the grates' Band O occupy their normall position.,'thej former is directly beneath the central opening c. in the latter,

and operates as a supplemental grate to' close said opening and prevent the downward passage of coal or cinders from above, without, irr

any manner, restricting saidupper grate O in its motion around its axis.

When it is desired to remove slate or cinders from the combustionehamber, the lower i or snpplemental grate rB may be rdrawn partially or entirely out from beneath the central opening c ofthe upper grate O, and through said opening said refuse will fall into the ashpit. Ordinarily, the, agitation of the main grate O will be sufficient to clean the fire, but,

to removel pieces of slate or other refuse too large to pass through the interstices of the lsame and the lower grate, the operation above described is necessary.

Theup'per grate G is agitated by means of a shaker-bar of usual form, which is intro- (lucedthrough a suitable opening in the door ofthe stove, and has its inner end contained within a socket, c', that is provided at the front edgel of said grate. The lower orsuppl'emental grate B is operated by a bar, D,

`which extends forward through a correspond- I detached therefrom, to' accomplish which object the following-described construction is had: The inner end ofthe bar D is made semicireular in plan View, and upon its lower side isprovided a pin, d, which extends vertically downwardrand has upon one side, near its lower en'd, a feather, d', which extends'rearward and to one side upon a radial line. Within the forward end, at the transverse center 'of the grate B, is a semicircular boss, b,

which contains a central opening, b', that corresponds i n size and'shape to the pin d, and at its rear side has a recess, b, for the passage of the feather d'. The upper side of the boss b is counterbored, as shown, for the reception of the senicircular end of the shaker-bar, while the lower side of the latter is, in'like manner, counterbored to receive the round forward end of said boss, the arrangement described afi'ording suflicient end bearing' to entirely relieve the pin d from wear. I

As thus constructed, the shaker-bar may be placedV in or removed from engagement by turning its forward end to one side until the feather d' coincides with the recess b. When in place said bar is firmly locked by the feather, and prevented from accidental displacement. The'position of the feather is such as to cause it to coincide with its recess when the bar ismovedoutward from the open side of the lug E. v

Having thus fully set forth the nature and merits of my invention, what I claim as new 1. In combination with the horizontally-sliding supplemental grate B and the rotatin g main grate O, the supporting-frame composed of. the circlar .portion A, and parallel bars AI and A', provided each with a rabbet,ra, substantially as and for the-purpose specified.

2. In combination with ciroular main grate U rovided with an o en center c and ar- 7 P i a `ranged to vibrate around its axis, the supplemental grate B, placed below said main grate, and .arranged to slide horizontally upon or within the parallel ways A' and A', which are attached to and form part of the 'supportingframe A of said main grate, substantially as and for the purpose shown, i

3. In combination with Vthe supplementall grate B, provided with-the .semicircular boss b, opening b', and recess b", the shaker-bar l), having the pin d and feather'd', substantially as and for the purpose set forth.

4. In combination with the longi'tudinallyreciprocating slaker-bar, capable of having its forward end moved laterally, the rightangled lug` E, secured upon the lower side of the base-plate of the stove, -and furnishing a support for said bar, substantially as'is shown and described. i

In testimony that I claimi'the foregoing I have hereunto set my hand this 21st day of January, 1876.

JAMES A. LAWsoN.

Witnesses: v

LEWIs L. FosDoK, J onN B. FosDoK.

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