US1078769A - Grate. - Google Patents

Description

G. E. CAMP.

GRATE. APPLIUATION FILED JUNE 12, 1912. 1,078,769. Patented Nov. 18, 1913.

2 SHEETS-SHEET 1.

WITNESSE INVENTORY ATTQRN EYS G. E. CAMP.

' GRATE.

APPLICATION FILED JUNE 12, 1912.

1,078,769, Patented Nov. 18, 1913.

2 SHEETS-SHEET 2.

ATTORNEYS 't" i 2 i GEORGE CAMP, 0F UTICA, NEW YORK, ASSIGNOR T0 INTERNATIONAL HEATER COMPANY, OF UTICA, NEW YORK, A CORPORATION OF NEW YORK.

GRATE.

Specification of Letters Patent.

Patented Nov. 18, 1913.

Application filed June 12, 1912. Serial No. 703,105.

To all whom it may concern.

Be it known that I, GEORGEE. CAMP, of Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Grates; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same reference being had to the accompanying drawings, and to the reference-numerals marked thereon, which form part of this specification.

My present invention relates to grates such as are used in boilers, heaters and furnaces.

One object of my "invention is to provide a grate wherein the grate frame is pivotally and demountably supported in position and wherein the grate bars are rotatably and removably supported in the grate frame; and further to provide in connection with such a construction of grate simple and improved means for holding the grate bars and their gears in place and suitable means for conveniently supporting the free end of the grate frame.

A further object is to provide means in such a grate as will allow it to be assembled piece by piece within the ash pit and allow it to be taken apart or repaired therein.

A further object is to make the parts of such form and relative construction as will allow them to be assembled or taken apart readily without the use of any tools, and further to have all the parts so formed and assembled as to obviate any difliculty being caused in its operation, assembling or dismounting by reason of parts becoming burned, Warped or rusted.

A still further object is to form such a grate with such means for assembling and holding the parts in position as will allow all the parts to be mounted upon the grate frame after the frame has been placed upon its pivoted rest in the ash pit and will hold such parts in proper position until delib erately taken apart and will upon the grate frame being raisedto normal position positively lock the grate bars and their gears in proper position upon the grate frame and prevent their becoming displaced in any way.

Figure 1 is a perspective view of a grate in lowered position embodying my invention. Fig. 2 is a perspective View of the grate frame. Fig. 3 is a perpendicular sectional view of the said grate taken on the line of one of the grate bars. Fig. 4 is a front elevation on an enlarged scale of the grate frame with part of the grate bars in place. Fig. 5 is a similar view with all of the grate bars in place and the gears mounted thereon. Fig. 6 is a similar view after the locking plate has been placed in position over the forward ends of the grate bars. Fig. 7 is a front elevation of the locking plate.

Referring to the drawings in a more particular description the ash pit casing 10 is the usual large casting upon which is mounted any suitable fire box (not shown) and communicating therewith by the large opening 11 in the top of the ash pit casing and immediately below which is supported when in normal position the grate. The grate frame 12 may be of any suitable size and shape to support the desired grate bars 13 and consists roughly of a back 14, front 15 and sides 16 and 17 connecting the front and back. Toward the rear of the sides 16 and 17 there project therefrom pintles 1S adapted to pivotally support the grate frame 12 in open topped pockets 19 formed toward the top and rear of the inside of the ash pit casing 10. The grate frame is passed into the ash pit casing through the usual large front opening of the casing and its rear end supported by placing the pintles 18 upon the open topped pockets 19.

At the front and near the top of the easing 10 are provided brackets 20 having open topped bearings therein 21 in which are pivoted depending hooks 22 which operate as gravity catches to support the grate frame in raised position by engaging downwardly turned ears 23 upon the forward corners of the grate frame 12. The hooks 22 are preferably held in their bearings by means of a rod 38 connecting the two hooks. Upon raising the grate frame 12 the slanting upper sides 23 of the cars 23 force the hooks 22 outwardly but as soon as this slanting upper side 23 has passedabove the seat 22 of the hooks 22 the hooks swing back of their own weight and the hook seats 22 engage the lower side of the ears 2S and thereby support the grate frame in raised or normal position. The grate bars 13 have at their rear end a short journal portion 24; loosely fitting into bearings 25 in the back of the grate frame. The forward end of the grate bars are provided with a journal portion 26 in front of which is an enlargement 27 adapted to receive the gears 28 and provided with means such as a lug 29 projecting from said enlargement into a recess 30 upon the gears to cause each grate bar and its gear to rotate together. Farther toward the front end of the grate bars is a further enlargement 31 spaced from the enlargement 27'by means of an annular recess 32. Upon such of the grate bars are to be moved directly by the usual shaker 33 there will be provided a further forwardly extending projection 34: of such angular shape in cross section as to be engaged by the shaker. The bearings 35 in the front of the grate frame to receive the journals 26 of the grate bars are open at one side. Preferably these bearings that are to receive a pair of cooperating grate bars open toward each other and in this case the brackets 36 upon the lower side of the grate frame front 15 are arranged in pairs facing each other leaving therebetween an opening 37.

Assuming the grate frame to be in place and in its normal raised position the grate bars will be mounted thereupon one at a time by passing them through the front opening of the casing and inserting their rear journals 24: in the bearings 25 while their forward journals will be passed upwardly through the opening 37 and then swung to the right or left as need be until they rest in their bearings 35. The right hand half of Fig. 4 shows a pair of grate bars as thus placed in position in the grate frame. As will be understood from Fig. 3 the grate bars will be held from longitudinal movement in the grateframe by reason of the enlargements 2'? in front of the bearings 35 and the usual enlargement of the grate bars which begins immediately to the rear of the front journal portion 26.

With the grate frame still in raised or normal position a gear wheel 28 will be placed upon the enlargement 27 of each grate bar and held from rotating thereon by lug 29 fitting into a corresponding recess 30 in said gear. As indicated in the drawings the parts are so arranged and proportioned as to cause the gear wheels 28 of the two right hand grate bars to mesh with each other and to cause the gear wheels of the two left hand grate bars to mesh with each other but the twomiddle gears, that is the adjacent gears of the two'pairs of grate bars do not mesh with each other on account of their being mounted out of alinement through the grate frame having an offset in the middle of its front. It will now be obvious that the gear wheels help to prevent the grate bars from leaving their proper position in bearings 35 or moving unduly toward the opening 37. As seen by reference to Fig. 3 the gears 28 are kept from rearward movement by the front 15 of the grate frame adjacent to the bearings 35.

With the grate bars and gears now in place the front of the grate frame is lowered part way by using the shaker 33 in engagement with the angular end 34 of one of the grate bars, and a spacing and locking plate 39 with slots tO extending upward from its lower edge and adapted to fit down upon the annular recesses 32 is placed in position from above. The weight of this locking plate keeps it in proper position down upon the projecting ends of the grate bars. Movement of this locking plate longitudinally of the grate bars is closely. limited by enlargements 27 to the rear and the enlargements 31 in front of the annular recesses 32 and thereby any forward movement of the gears 28 is prevented.

It will now be obvious that the entire grate is completely assembled and its parts cannot by any ordinary movement or accident become displaced while it will be seen that the grate can be taken apart by reversing the proceedings above outlined. The grate frame with its attached parts is now raised to normal position where it is supported by the gravity hooks 22. As shown particularly in Fig. 3 when the grate is raised to this upper or normal position the top of the spacing and locking plate 39 is brought so near to the adjacent part of the horizontal annular ring 10" of the casing as to preventthe locking plate 39 being raised far enough from the forward ends of the grate bars as to become disengaged therefrom. It will be seen therefore that the parts of the entire grate are now positively locked in their proper position. If it is de sired to dump the fire the entire grate frame with all its attached parts may be allowed to swing downwardly without any danger of the parts becoming disconnected. On the other hand while in this lower position by first removing the spacing and locking plate all or any one of the gears 28 may be removed and replaced by others or a grate bar may be removed and another one inserted in its place by first removing only the two gears from that pair of grate bars.

It will be particularly noted that the connection hereinabove shown permits of the grate being entirely assembled or taken apart to any extent desired and reassembled without the use of any tools whatever and that the parts are of such simple construction that the work may be done by one not skilled in grate construction.

It will be further seen that the construc tion and relative adjustment of the parts is so simple and direct that a close fit of the parts is not required and therefore the parts can be assembledor taken apart easily even though they may be considerably warped, burned or rusted.

In taking the grate apart after the grate frame has been lowered and the spacing and locking plate removed, the grate frame will again preferably be raised to normal position as in this horizontal position there is less tendency ofthe gears and grate bars to become displaced. With the grate frame.

in this raised position such of the gears and grate bars may be removed and replaced as is necessary, then the grate will be lowered temporarily to admit of the locking plate being placed in position as already described for the original assembling of the grate.

What I claim. as new and desire to secure by Letters Patent is:

l. A grate frame having rear bearings and open-sided front bearings, grate bars having their rear journals mounted'in said rear bearings and their front journals. inserted in said front bearings through the open sides'thereof, each grate bar having forward of its front journal two shoulders spaced apart with an annular groove therebetween, and a plate having recesses extending upwardly from its lower edge and adapted to be lowered over said grate bars and have said recesses fit into said grooves and retain said bars in their bearings and be retained on said bars by said adjacent shoulders.

2. A casing, a grate frame movably mounted therein and having rear bearings and open-sided front bearings, grate bars having their rear journals mounted in said rear bearings and their front journals inserted in said front bearings through the open sides thereof, each grate bar having forward of its front journal two shoulders spaced apart with an annular groove therebetween, and a plate having recesses extending upwardly from its lower edge and adapted to be lowered over said grate bars when the grate frame is in lowered position and have said recesses fit into said grooves and retain said bars in their bearings and be retained from longitudinal move ment on said bars by said adjacent shoulders and locked from upward movement from said grate bars when the frame is in. normal position by said casing.

3. A casing, a grate frame pivotally and removably mounted therein and having rear bearings and open-sided front bearings, grate bars having their rear journals mounted in said rear bearings through the open sides thereof, each grate bar having forward of its front journal two shoulders spaced apart with an annular groove therebetween, and a plate having recesses extendmg upwardly from its lower edge and adapted to be lowered over said grate bars when the frame is in lowered position and having said recesses fit into said grooves and retain said bars 1n their bearlngs and be retained from longitudinal movement on sald bars by said ad acent shoulders and retained from upward movement thereon by said cas- "ing when the frame is in raised position.

i. A grate frame having rear bearings and open-sided front bearings, grate bars having their rear journals mounted in said rear bearings and their front journals inserted in said front bearings through the open sides thereof, each grate bar having forward of its front journal two shoulders spaced apart with an annular groove therebetween, a plate having. recesses extending upwardly from its lower edge and adapted to be'lowered over said grate bars and have said recesses fit into said grooves and retain said bars in their bearings and be retained having'their rear journals mounted in said rear bearings and their front journals inserted in said front bearings through the open sides thereof; each grate bar having forward of its front journal two shoulders spaced apart with an annular groove therebetween, a plate having recesses extending upwardly from its lower edge and adapted to be lowered over said grate bars when the grate frame is in lowered position and have said recesses fit into said grooves and retain said bars in their bearings and be retained from longitudinal movement on said bars by said adjacent shoulders and kept from upward movement thereon by the easing when the grate frame is in raised position and gear wheels upon the said inner shoulder of said grate bars and held from longitudinal movement thereon by the front bearings of the grate frame and said recessed late. p In witness whereof I have aflixed my signature, in the presence of two witnesses, this 3rd day of June. 1912..

GEORGE E. CAMP. Witnesses:

ETHEL BUTTERWORTH, HARRIET WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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