US141837A - Hebman urban - Google Patents

Description

' I H. URBAN. Apparatus for Tampering Steel-Plates and Similar I Articles. N0. 141,837. Patented AugustI 2-,I873.

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IMPROVEMENT IN APPARATUS FOR TEMPERING STEEL PLATES AND SIMILAR ARTICLES.

Specification forming part of Letters Patent No. February To all whom it may concern:

Be it known that I, HERMAN URBAN, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Tempering Apparatus, of which the following is a specification:

This invention relates to an apparatus wherewith large plates of steel, such as are employed in the manufacture of fire-proof safes, 850., can be tempered in the most expeditious and thorough manner, and in such a way as to prevent the slightest buckling or warping. To accomplish this result I provide two boxes or chambers, which are placed parallel with each other and a suitable distance apart, the inner or opposing sides of said boxes being provided with a large number of orifices for the simultaneous and uniform discharge of water upon the sides of the heated steel plate, which is inserted between said boxes, as hereinafter more fully described. The water thus projected upon the heated plates holds in solution common salt or other chemical agent, such as will produce a suitable pickle, and this pickle is contained in a reservoir, which is elevated from twenty to forty feet so as to give a good head or pressure of water in the above-described boxes or chambers. The water is conducted from this elevated reservoir to the perforated boxes by suitable valveguarded pipes, and after being ejected from said boxes upon the heated plates it flows into a tank, within which these boxes are located. After being used, the water is returned from the tank to the elevated reservoir by any suitable pumping apparatus, thus avoiding an waste of the pickle.

Figure 1 is a vertical section of a tempering apparatus embodying my improvements, a heated plate of steel being shown as in the act of being inserted between the perforated boxes. Fig. 2 is a plan of the aforesaid perforated boxes on a somewhat enlarged scale. Fig. 3 is a transverse section of the perforated boxes, showing a plate of steel inserted in position between them and the jets of water dischargin g upon the sides of said heated plate. Fig. 4: is a plan of the bellcranks, which are employed for the simultaneous opening and closing of the valves which control the flow of water to the perforated boxes. Fig. 5 is a renew, dated August 12, 1873 application filed 24, 1873.

horizontal section, showing a form of perforated boxes adapted for the tempering of angle-steel braces, corner pieces, &c.

A represents an open tank of any suitable dimensions, and having secured within it a number of transverse beams or sills, B, for the support of boxes or chambers 0 0. These boxes are rectangular vessels, and are preferably made of cast-iron, although they can be constructed of wood, in which case the planks composing them should be stout enough to resist the pressure of water that is exerted within said boxes. The inner or opposing sides of these boxes consist of plates D, which are pierced with a large number of perforations, d, that may be of any suitable size, and as near together as will be the most effective. The tops of these boxes have openings E, which are covered with caps F, the removal of which permits said boxes being cleared of any sediment or other obstructions that may accumulate within them and choke up the discharge-orifices d. Securely bolted to the upper and under sides of these boxes are guides G G, between which the heated plate of steel Y is inserted. The distance from these guidebars to the boxes should be such as to maintain the heated plate in a position that will insure it receiving, simultaneously on both its sides, the full force of the numerous jets of water as they issue from the orifices d- Brackets h attached either to the sills B or the under side of boxes 0 G serve to support a longitudinal bar or shelf, H, upon which the heated plate of steel rests, as more clearly shown in Fig. 3. The chambers O 0 have attached to their ends inlet-pipes I I J J, which communicate with an elevated reservoir, K, the latter being supported upon a staging, L. This reservoir may be placed at any suitable elevationsay from twenty to forty feet, or more, according .to the pressure of water which it is desired to have within the perforated boxes.

The ends of the pipes I I and J J, which proj ect within the reservoir K are provided with puppet or other suitable valves.@' '5' and j j, that are capable of being opened by rods M. These rods extend up, and are attached to the short arms of bell-cranks N N O 0, the latter being pivoted to brackets n a o 0. These brackets project from beams P, which are dis posed alhwart the upper end of the reservoir. In order that the discharge-valves i z" and jj may be opened and closed simultaneously, the long arms of the said bell-cranks are connected by links 1' with a rod or rope, R, which extends down near the tank A, so as to be readily grasped by the operators who handle the plates. This rod or rope traverses a tube, S, which passes up through the reservoir, which tube may serve as an overflow-pipe for the same. Attached to the discharge-pipes that lead from the reservoir and below the valves 1' i and j j are small tubes T, whose upper ends project above the water-level in said reservoir. The object of these small tubes is to admit air below the valves i t" and jj as soon as they are closed, so as to insure the draining of pipes I I and J J, which precaution is necessary to prevent them freezing up and bursting in the winter-season. V A pump, U, having a discharge-pipe, V, is employed for returning the water from tank A to the elevated reservoir K. In the drawing this pump is shown as being operated by a crank and pitman 5 but it is evident that an independent steam-pump, a siphon-pum p, or other suitable means may be employed for elevating the water. Grapplingirons or hooks W, depending from a rope or chain, X, facilitate the handling of the heated plate Y. Any approved form of furnace, Z, may be employed for heating the plates.

The plate Y to be tempered is first cut to the proper size, and perforated at y for the reception of the bolts, rivets, &c., after which it is placed in the furnace Z and heated to the proper temperature. After being thus heated the plate is removed from the furnace and conveyed to the side of the tank, at which position the hooks W are inserted in the aperture y, and the plate elevated above the tank, and then allowed to descend between the guides G G and rest upon the supporting-shelf H, which operation is accomplished in a few moments. As soon as the heated plate has been deposited upon the shelf the operator then pulls the cord or rod B so as to open simultaneously the valves it" and j j, and allow the brine or pickle contained within the reservoir K to descend and fill the boxes 0 O, and issue through the orifices d directly upon the sides of said plate.

' Owing to the head of water due to the elevated reservoir, the jets are ejected simultaneousl y, upon both sides of the heated plate, from the perforations in the opposing boxes 0 O, and the result is that said plate of steel is uniformly cooled throughout its entire length and breadth.

This method of tempering the plate renders it equally hard at every point, and as it is cooled in a perfectly uniform manner it never buckles or warps in the least, and when removed from the bath presents as flat and unwarped appearance as it did before being placed in the furnace.

When the plate has been sufficiently cooled it is withdrawn from between the guides G G, and the water discharged into the tank is returned to the reservoir by the pumps U, after which the above described operation may be repeated until the requisite number of plates have been tempered.

As the same water is used over and over again there is no waste of the pickle, thereby effecting a saving of water and salt, and preserving the brine of the same strength.

The form of perforated box, shown in Fig. 5, is intended for angle-steels, corner pieces, &o., and it is evident that this method of tempering, by projecting jets of water from the opposing sides of perforated chambers, boxes, pipes, or other receptacles upon heated plates, can be arranged so as to be employed for any shape or size of sheets that require hardening.

An obvious but inferior modification of my apparatus can be arranged by omitting the reservoir K and supplying the boxes 0 G with water from the street mains. In this case, however, the water would not be salt, and it could not be used repeatedly on account of its becoming too hot; but with the arrangement herein illustrated the length of pipe V, and the exposed surface of the reservoir, maintains the brine" continually at as low a temperature as is necessary.

In establishments where unusually large plates are used a greater number ofperforated boxes may be employed than is represented in these drawings.

I do not claim subjecting the heated steel plates to the action of a current of water under pressure, as I am aware thatthis has been done before, though not by applying the water in the form of jets uniformly over the surface, as described by me.

I claim as my invention- 1. A tempering apparatus consisting essentially of two or more perforated receptacles, between which the heated plate is temporarily placed and subjected upon both of its sidesto the action of jets of water or brine, which are simultaneously ejected under pressure from said perforated receptacles, substantially as herein explained.

2. The combination of tank A, boxes or chambers U C D d, guides G G, support H, pipes I I J J z i j j, reservoir K, valve-operating device M N N O O R, and pump U, or equivalent devices, for the object herein stated.

In testimony of which invention I hereunto set my hand.

HERMAN URBAN. Attest:

Gno. H. KNIGHT, J AMEsH. LAYMAN.

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