US2450146A - Glass-lined container for corrosive substances - Google Patents

Description

Sept 8, 1948. P. E. KNUDSENV 2,450,146

GLASS-LINED CONTAINER FOR CORROSIVE SUBSTANCES Original Filed 001.. 19, 1943 s She'ts-Sheet 1 r I I l INVENTOR. P fiQ [IMW/DJEN A? 7' TOE/VEK Sept. 28, 1948.

P. E. KNUDSEN GLASS-LINE) CONTAINER FOR CORROSIVE SUBSTANCES Original Filed Oct. 19, 1943 s Sheets-Sheet s M @J m w. u 0 a d W 2 2 w J. a, v u I/ l/ l/ l/ l/ I/ I l l/ ha 7 5 Z Z a W 2 0 0 a 3 9 I 4 z W O g 3. Z W 2 7 F O Z M I N V EN TOR.

i atenied Sept. 28, 1943 GLASS-LINED CONTAINER FOR CORROSIVE SUBSTANCES Percy E. Knudsen, Pittsburgh, Pa, assignor to Pittsburgh Plate Glass Company, Allegheny County, Pa... a corporation of Pennsylvania Original application October 19, 1.943, 'Serial No. 506,792. Divided and this application Septembet .6, 1944, Serial-No. 552,844

, 2=Claims. 1

The present invention relates to the construction of containers for liquids, e. g., corrosive substances, such as pickling acids, cleaning solutions, plating baths, or for other materials of like nature, and it has particular relation to the provision of containers of the foregoing type in which a shell of wood, metal, concrete, or the like is lined by relatively heavy plates of glass providing a surface which is highly resistant to attack.

One object is to provide a container, -the contents of which can easily be inspected.

A second object is to provide improved means for spacing the lining and the outer shell of such containers.

These and other objects will be apparent from consideration of the following specification and claims.

It has heretofore been proposed to form containers for various types of acids and solutions by setting plates of glass, preferably tempered, inside a container in somewhat spaced relation with respect to the wall-s of the container, in order to provide a lining and then to fill the space between the plates and the shell with a resistant plastic substance, such as high melting asphalt or plasticized sulfur, poured in'white molten and allowed to set to a solid state.

The present invention contemplates as one feature the provision of sight holes or inspection windows for such containers in which the continuous plates of glass constituting the lining function as a transparent closure medium permitting the free passage of light into the contents of the tank.

As a further feature, the invention involves the provision of adjustment screws operable exteriorly of the tank for securing the glass plates constituting the tank lining in spaced relation with respect to the walls.

For a better understanding of the invention reference may now be had to the accompanying drawings in which like numerals refer to like parts throughout and in which Fig. 1 is an elevational' view illustrating a tank constructed in accordance with the provisions of the present invention; Fig. 2 is a. fragmentary sectional view taken substantially upon the line II-II of Fig. 1; Fig. 3 is a fragmentary sectional view taken substantially upon the line III-III of Fig. 1 and illustrating theconstruction of a corner of the tank.

In the embodiment of the invention shown a wooden shell H] includes side walls of relatively heavy planks or boards II, which are rabbeted together as indicated at ['2 in Fig. 3 to provide a corner structure. The corners are further rein- (Cl. 220-15 e forced and secured together by vertical bars iii of wood secured to the boards II by means of screws Hi. The side walls may also be reinforced by means of horizontal rods or bolts l6 and vertical bolts l! which, at their extremities, are provided with nuts l8 countersunk as indicated at it into the wood. The nuts of the horizontal bolts are covered by the bars I3, while the upper nuts oi the vertical rods are covered by coping bars 20.

The bottom of the shell is also formed of wooden planks 2! which, at their extremities, rest upon bars 22 of wood or the like. The lower nuts of the bolts I? are countersunk in these later bars.

The lining of the tank, as shown in Fig. 3, includes thin plates 23 of glass bearing against the inner surface of the wooden shell and plates 24 spaced therefrom, and preferably of relatively heavy plate glass, which should be tempered in order to render it resistant to heat shock. The vertical edges of the latter plates are beveled as indicated at 25 and their upper edges are secured in grooves in coping bars 20 so that they cannot fall inwardly. The space between the thin plates and the heavy plates is filled with a mastic or plastic composition 26, preferably of high melting asphalt or a plasticized sulfur, which in general is highly resistant to chemical attack and also serves to transmit stresses from the lining plates to the outer shell as well as sealing all joints between plates.

It is to be observed that the plates 23 and 24 are held in suitably spaced relation with respect to each other by means of round pointed set screws 21, which are threaded through nuts 23, countersunk in openings 29 in the inner face of the walls of the shell. Said screws include indentations 21a for a screw-driver by means of which screws may be adjusted to obtain accurate spacing of the plates and to hold the plates from rattling during or prior to the operation of pouring the heated asphalt 26. The rear extremities of the set screws may be protected by means of plugs 30 of wood or the like, and the points may have caps 39a of lead to protect them.

The lining of the bottom portion of the tank may include slightly sloped edge sections 3!, that comprise plates 32 and 33, which rest upon beveled or wedge-shaped blocks or bars 34 upon the bottom boards 2! and are spaced by small sections 35 of glass. The space between the plates is filled with a mastic introduced while hot and fluid in a casting operation. The bottom also includes a horizontal central section 36 having a drain opening 31 formed therein, which opening registers with a drain structure 38.

An inspection window in the tank constructed in accordance with the provision of the invention includes an opening 4|, which is but a small section of the tank wall, formed in the tank at an appropriate point, but which does not extend through the lining plate 24. The opening is shown as being rectangular with a horizontal lower edge and is surrounded by a frame 42 of wood or the like. Wooden bars 43 may be inserted between the inner and outer sheets of glass in order to provide spacers. It is to be noted that the body of the thermosetting, e. g., Bakelite, plastic 44 is disposed about the margins of the spacer members 43, in order to prevent the possibility of molten asphalt from contacting with the wood of the members. This resin is applied while still plastic and adhesive. It is baked to thermostat stage, after the spacers and the plates are assembled.

As shown in dotted line in Fig. 1, the spacer bars 43 constitute flattened isosceles triangles that function to admit of the escape of imprisoned air from under the lower edges of the bars as the molten plastic is poured into the space between the outer shell and the inner lining. Screws 45 secure the frame to the spacer bars 43 and also screws 41 function further to secure the frame to the edges of the opening.

Under some conditions there might be a possibility of breakage of the liner plate 24, which would permit the escape of the contents through the opening in the tank wall. In order to safeguard against such occurrence a safety plate 48 is provided. This plate at its margins rests against the frame 42, and it may be locked in place by means of a second frame 49 of wood or the like, which is secured in place to horizontal reinforcing bars and vertical bars 52 by means of screws 53. These reinforcing bars are held in place by means of screws 54 threaded into the walls of the shell and function further to reinforce the edges of the opening. As best shown in Fig. 1, the horizontal bars 5| are of such length that they can be mortised into the vertical corner bars 13. The vertical bars 52 are also mortised into bars 5 l The construction of the tank herein shown is substantially self-evident. The wooden shellis first built up, after which the thin plates 23 are disposed in the shell in contact with the wood. The heavy inner plates 24 are disposed in position and the set-screws 21 are then adjusted to obtain the desired spacing and to insure contact between the face of the glass plates and the points and screws. The plastic, such as asphalt of high melting point, is fused at a temperature at which it is highly fluid andis then poured into position.

points in chemical reactions can thus be observed with considerable accuracy.

The forms of the invention herein shown and described are to be considered merely as by way of example. It will be apparent to those skilled in the art that numerous modifications may be made therein without departure from the spirit of the invention or the scope of the appended claims.

This application is a division of my copending application Ser. No. 506,792, filed October 19, 1943, issued as Patent No. 2,385,924.

I claim:

1. A container structure comprising an outer reinforcing shell and a lining of glass plates disposed in the shell in spaced relation with respect to the shell, the space between the shell and the lining being filled with mastic, spacing screws threaded through the shell and being operable from the exterior thereof and having points engaging the faces of the lining plates to hold them in predetermined position with respect to the walls of the shell.

2. A container'structure comprising an outer reinforcing shell and a lining of glass plates disposed in the shell in spaced relation with respect to the shell, the space between the shell and the lining being filled with mastic, spacing screws threaded through nuts countersunk in the inner face of the shell and being operable from the exte-- rior thereof and having points engaging the faces of the lining plates to hold them in predetermined position with respect to the walls of the shell.

PERCY E. KNUDSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,262,009 Brady Apr. 9, 1918 2,364,014 West Nov. 28, 1944

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