US98495A - Improvement in brick-machines - Google Patents

Description

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J. S. HOBBS AND LUTHER ELDER, OF WEST FALMOUTH, MAINE.

Letters .Patent No. 98,495, dated January 4, 1870.

IMPROVEMENT IN BRICK-MACHINES.

. Tlie Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.- l v f Be it known that we, J. S.' HoBBsand LUTHER R. ELDER, both of lest Falmouth, in the county of Cumberland, aud State of Maine, have invented a new and useful Improved Brick-Machine; and we do hereby declare the following to be a full, clear, and

exact description thereof, which will enable others. to make and use our invention, reference being had to the accompanying drawings, forming part ot'- this specification, in which- Figure 1, plate 1, shows a front-end elevation.

Figure 2, the method ofadjusting the tracks.

Figure 3, a detail from the rear end, showing the removable strip.

Figure l, plate 2, shows a side elevation of a p0rtion ofthe machine.

Figure 2, a side elevation of the connection between the main shaft and the carriage.

Figure 3 shows the method of adjusting the hoisting-chains.

Same letters show like parts.

Our invention relates to certain improvements, hereinafter to be particularly explained, in a machine for making bricks, and we will trst disclaim those parts not herein claimed as new, which are common and previously known. y

The clayis'ground or pulver-ized in areceptacle, A, by au upright revolving spindle, having projecting ra.- dial arms. lhis is not claimed; neither the box into which the clay is forced from the receptacle, which box is shown at B; neither the piston C, which forces the clay into the moulds, nor the vertical motion of the piston, nor the horizontal motion of the moulds and their frame; (D shows the moulds neither, when by itself considered, operating the piston and the moulds by the main shaft E.

The first improvement claimed in ihisinvention re lates to the box B. v

Stones, stubble, and other articles frequently collect in the box, being forced in from .the receptacle A, and prevent the proper descent of the piston, and injure the form and perfection of the bricks in the moulds. When this has been the case heretofore, there has been great trouble in removing these obstructions, it being necessary, in order to do so, to remove the. crossbeam a, detaching it from lthe upright 1),'in order to lift out the piston C, and thus reach into th'e box B.

We obviate this trouble by means of the trap or door c in the front side ofthe box B.I lhis door is secured by the 'four-armed catch (l, the ends of said arms working in the staples or clamps c. These four arms are so ar1anged, as will be seen from the drawings, that when any one of the four is either entered or thrown out of its staple or clamp, each: of the others is also The next improvement is the spring-scraper F, at.

tached to the lower part, of the box B by the spirals f, and by them kept pressed down upon the top of the ,moulds D. By this arrangement, every time the carriage is drawn ont for the purpose of removing a set of moulds, with the brick therein, all loose clay, &c.,

on the top thereof, is readily scraped olf, without involving the necessity. of 'its being done, as is usual, by a workman, with a stick held in the hand. The carriage is represented'thus drawn out in tig. 1, plate 2. The carriage, as it is drawn backward and forward, moves on rollers y. f

Motion is given to theY carriage from the main shaft E. rI his shaft is revolved by the lever G. From this main'shaft rise the bifurcated arms h, into which are hinged, at t', the ,connecting-rods j, which rods are also hinged to the bottom of the carriage at k.

llshows the carriage.

As the shaft E is partially revolved by the lever G in one direction, the carriage H is drawn forward; and as the lever G is pushed back, the carriage also moves back, as common.

The purpose of the arrangement shown in iig. 2, plate'2,'is to make the draught upon the carriage H as nearly horizontal as possible. Then it is at all downward, as has heretofore been the case in such machines, then the joint between the bottom of the box B and.' the moulds D, becomes so loose that the clay, when pressure is applied, oozes out, and the bricks are consequently imperfect.

The trucks g, ofthe carriage H, revolve on the tracks l, set on the beams m at the front, and m at the rear end of the machine. 'lhese beams rest on the crossbeams of the machine, which are shown in the rear, at n., g. 2, plate 1.

-. In use, these tracks are aptlto sink rso much, that.

the moulds D drop below the box B, so that the operation ofthe machine is very defective.

Te obviate this liability by means of the screws o, 4

with, which the beams m. can be raised or lowered, as required, and thus the carriage H which rests on lthese. beam's. of the machine, but similar devices are applied at the front end, so that the two ends of the track can be raised equally.

The piston in the box B is raised when the Alever G is thrown forward, by means ofthe chains L passing up over the pulleys M, and hooked on to a cross-bar,` at p, from which cross-bar rise the vertical pieces b,

and. thus the piston is raised as the cross-bar p rises,

the pieces b being attached to the piston, as shown.

These chains are apt to lengthen in use, from vari Fig. 2, plate 1,shows those at the rear end ous causes, as wearing, &c., and, heretofore, they have been adjusted in a very rude manner,`as by attaching them by a spike to the main shaft, which injures the machine, and is, besides, an imperfectmethod.

We obviate this diiculty, as shown in fig. 3,- plate 2, where a movable segment-gear is represented as attached to the chain, and Aalso as fitting or matching another segmental gear rigidly attached to the main shaft.

` When the chain has become lengthened, the diiiculty is overcome by removing the pin or bolt q, and drawing back the. movable segment sufficiently to tighten the chain, and then allowing it to engage another portion of the fixed segment. Y By replacing the bolt, the movable gea-r will be. held iirmly to its place. Heretofore, the piston G has been made of wood, and in consequence, has worn against the box, so as to be imperfect in its operation. This we obviate by attaching tothe piston and the inside of the box, sheets or facings of metal, which facings run up on the back side of the piston, as shown at r. This metal facing protectsthe piston from wear, and enables it'to-work more perfectly, and also diminishes the friction, and consequently the labor of operating.

We would here specify that we do not claim, broadly, facing with metal two surfaces which workby each other, but only in its application to this machine. At the rear of the machine is shown the removable piece R, fig. 3, plate 1. I n this are the slots s andthe square-headed buttons t. When these buttons t are turned, `so that they are lengthwise ot' the slots, the piece R can be removed. When crosswise of the slots, it is held in place. This removable piece R is for the purpose of facilitating the repairing, examination, or

adjustment of any part of the interior ofv the receptacle A. j

T shows the pedal, by which the piston is forced down into the box B. e

We do not claim the devices set forth in the patent of Henry Martin, reissue No. 2,553, April 9,1867. We do not' claim the method of regulating the rise and fall of' the plungeras therein shown. Neither do we claim the manner ot' working the plunger as therein shown. 'lhe device shown in iig. 3, plate 2, has t'or its purpose simply to provide for the stretching of the cord or chain, as hereinbefore set forth. Neither do we claim the devices set forth in the patent of D. Packard, January 19,1869, which consists of a rod, lever, plunger, bar, cam-wheel, and treadle to raise the plunger, and to press the same. Our device is not employed for such purpose, but solely' for the one hereinbefore specified. Neither do we claim providing a press-box with a yielding gate, or constructing the bottom of the press-box with grate-bars of a lozlengefshape, as in the patentof W. Baker and G. Martin, May 1, 1866, No. 54,460. Neither do we claim an adjustable pusher, applied to a table, to move the mould-boxes from the rear to the front ot' the' table, or rack-bars, oscillating sectors, and pit-mamconnected with the main shaft, as is shown in the patent of D. Van Vranken, June 19, 1866, No. 55,748.

What we claim as our invention, and desire to secure by Letters Patent, is

1,. The spring-scraper F, arranged to operate as described.

2. The segment-gears on the shaft E, with the pin i q and chains L, as herein described.

3. The mould-box, made as herein described, that is, having the spring-scraper and the removable strip in the front thereof, having the four-armed clasp,as

herein set forth. Y

J. S. HOBBS. LUTHER R. ELDER.

Witnesses:

ELLERY H. STARBIRD, WILLARD B. STARBIRD.

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