US1193614A - Appabatus for heating wax-cases - Google Patents

Description

I. P. RIVETT. APPARATUS FOR HEATING WAX CASES.

APPLICATION FILED SEPT. I6, 1914.

Patented Aug. 8, 1916.

2 SHEETS-SHEET 1.

.l. P. RIVETT.

APPARATUS FOR HEATING WAX CASES.

APPLICATION EILED SEPT-16,1914.

Patented Aug. 8, 1916.

2 SHEETS-SHEET 2- softening the surface.

n ras JOSEPH P. RIVETTQOF CHICAGO, ILLINOIS.

APPARATUS FOR HEATING WAX-CASES.

Specification of Letters Patent.

Patented Am -(8,1916.

Application filed September 16, 1914. Serial No. 862,122.

To all whom it may concern;

Be it known that I, JOSEPH P. RIVETT, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Apparatus for Heating VVax-Cases, of which the following is a full, clear, and exact specification.

This 1 invention relates to improvements in apparatus for heating wax cases comprising an inclosing structure provided with racks or other means, in which heretofore a number of wax cases have been supported with their faces horizontal one above the other, and spaced apart for the passage of heat rising from below and accumulating at the top of the inclosing struc ture, to which latter for inserting and re moving the wax cases access is limited to the use of a single door at the front side thereof.

l/Vax cases consist of a metal base and an overlying somewhat thick; layer of wax which for use must be softened by heat immediately before receiving type impressions for electrotyping purposes, the best result from which is only obtainable when the surface of the wax is uniformly softer than its core, that is to say the wax next the metal base, and a result impossible of securing withany degree of certainty when wax cases in horizontal arrangement as above described are exposed to rising heat, which is the only means adapted for successfully Among the objections to the horizontal arrangement of wax cases above described may be mentioned that when several wax cases are so arranged it is impossible to uniformly impart heat to any two of them because the bottom case receives the direct impact of the moving heat at its highest de gree, the top case stagnantheat accumulating at the top of the inclosing structure,

whereas the intermediate cases areexposed to a constantly reduced rising, heat; that the rising heat imparts a higher degree of heat to one end than it does to the other end of the cases, with the result chat in pracoverheated, as is frequently liable to. occur in the prior structures, the wax surface of every case must be uppermost, with the result that the core of the wax is made softer thanits surface, exposed as it is to heats of conduction of a higher degree than contacts with the surface wax; and that when access is had to the inclosing structure by but a single door it is impossible to heat wax cases in the absence of a stagnant heat or to prevent one end of a case being heated higher than the other while removing them from their inclosing structure. In short, before my invention there has been no apparatus for heating cases in which it is possible and practical to at all successfully simultaneously heat a number of wax cases, nor wherein it is possible to soften the surface of a singly heated wax case without producing a greater softness of its core than of its surface however many times it may be reversed from end to end during the application of heat thereto.

From the foregoing it will now be obvious that any means by which it is possible and practical to uniformly and successfully heat a number of wax cases and reduce their wax to the degree of softness for securing the best results will be a marked improvement and advance in the art of heating wax cases. 7

The prime object of my invention, is an apparatus for heating wax cases having a several times greater capacity than heretofore, and in which the wax surface of a large number of wax cases may be simultaneously reduced to the desired consistency by heat without unduly raising the temperature of their core, and in the presence of a heat impossible for reducing the consistency of the wax to a softness below that best adapting :it for electrotyping purposes and for obcases in which the cases are spaced in vertical position, providlng for the freest possible passage of rising heat upwardly be tween them, and wlth means bywhlch it is practical and possible to maintain a uniform temperature of heat in contact with and throughout the entire surface of every case,

both when arranged in a plurality of tiers, one above the other, or in a single tier.

A further object of my invention is to provide an unobstructed access to the Wax cases when so arranged to a heating appara tus at both the front and the rear thereof by means of doors convenient of manipulation and in such a manner that one or both of said doors may be so shifted as to regulate the temperature of the heat to which the wax cases are exposed.

Another object of my invention is to provide an apparatus for heating wax cases with means by which when inserting the wax cases into their operative heating position they are effectively prevented from com.- ing in contact with the door opposite the side from which they are inserted, and which. through the shifting of the doors are automatically moved out of the path along which the heated cases are removed bothfor in spection and use.

A further object of my inventionis an apparatus for heating wax cases providing for two tiers of wax cases, one above the other, each of which tiers is made up of a plurality of cases, provided with means for maintaining the cases of both tiers from contact with the door opposite the side from which the cases are inserted and separately and. inde pendently operated by the shifting of the adjacent door, that is to say one of which means is operated by shifting the door downwardly from its closed position and the other by shifting the door upwardly from the same position.

Another object of my invention is to provide means by which the rack or racks as may be, sustaining and supporting wax cases in a vertical position, may be conveniently so adjusted as to adapt them for Wax cases differing in dimensions.

With these ends in View, my invention finds embodiment in certain features of novelty in the construction, combination and arrangement of parts by which the said ob.- jects and certain other objects are attained, all as hereinafter fully described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In said drawings: Figure 1 is a perspective view of an apparatus for heating wa-x cases with the front door, that is to say the door from which the heated cases are removed, in a closed position. Fig. 2 is a vertical section on the line 2-2 of Fig-1, with the upper portion of the apparatus removed. Fig. 3 is a similar view on the line 33 of Fig. 1. Fig. 4 is a horizontal section on the line 4 l of Fig. 1. Fig. 5 is a detail perspective view of one of the air supply pipes, more clearly showing the form of the jet orifices therein, and Fig. 6 is a detail top plan view of one of the racks showing the form of the grooves therein retaining the wax cases in their upright position in the apparatus as shown in Fig. 3.

Similar characters of reference indicate the same parts in the several figures of the drawing.

The inclosure of the heater for wax cases in which my invention finds embodiment,

consists of opposing side walls 77, the height of which issubstantially greater than the width, and opposing front and real walls S8 of the same width, but of a heighl about one-half or less than that of the side walls 77, whereby there are provided between the side walls opposing doorways respectively for a sliding rear door 9, and a sliding front door 10. These several walls are preferably formed from sheet metal, and are provided with closed; bottom 11 (see Fig, 2) provided with upturned, flanges 12 between which the walls are fitted, a top or cover 13 therefor being supported by the side walls 77, and having opposing side flanges 1% as indicated in Fig. 1, overlapping the walls 77 and riveted. thereto as indicated at 15. The meeting edges of these several walls at the four corners of the inclosing structure are closed and secured. by angle irons 16 riveted to the walls as indirated at 17, and whereby a stiff and rigid inclosing structure is formed, which may be rigidly secured to the floor of the operating room by means of angle irons 18 at each corner riveted to the upright corner angle irons. at 1'9 and secured to the floor by bolts 20.

The unattached flanges 21 of the angle irons 16 form an outer bearing for the sliding doors 9 and 10, the inner bearing of which is against upright bars 22, which (see Fig. 1) are secured to the bottom 11 of the structure, and like the unattached flanges 21 extend from the bottom to the top thereof, and whereby the sliding movement of the doors may be from the bottom of the structure to the upper end thereof, and upwardly far enough to afford free access to the entire contents of the inclosing structure as will be more fully described hereinafter.

Projecting above the inclosing structure at the front corners thereof and adjacent the door 10 are posts 2323, at the upper ends of which are mounted pulleys 24 and 25 supporting chains 26 and 27, the ends of which are respectively secured to the sash 10 as indicated at 28, and suspend from their opposite ends a bar 29, operating as a counterweight for the sliding door 10.

lounter-weight 29 is sleeved at each end and guided upon rods 30, 31 against which the bottom 11 of the inclosing structure abuts, both of which rods pass through angle iron brackets secured to the closed side walls of the inclosing structure forming bracket supports for av plurality of bars 34, which are the bottom bars of the lower rack in which the wax cases are supported in their operative position, the single top bar for which is indicated at 35, the upper end of the rod 31 passes through and is secured by means of a nut 36 through one of two angle plates 373 7 secured to the side walls of the inclosing structure, and supporting a plurality of bars 38, which form the bottom bars of another and upper rack for sustaining the wax plates in their ope 'ative position, the top bar of which is indicated at 39. The rod 30, however, terminates below the bottom bars 38 of the upper rack as indicated at 4:0, and it may here be noted that these several racks are provided with (see Fig. 6) transverse grooves ll, the ends of which are made fiar ing as indicated at 42 for facilitating the introduction of the wax cases thereto. The rods 43 and 44 serve as a means for adjusting the racks 35 and 39 to wax cases differing in height and therefore in sizes, and to which end these racks are secured to the rods by thumb screws 4t7-47, and may be by other suitable means.

As a means for preventing the wax cases when introduced into the heater from being pushed forward in the path of the sliding front door 10, suitable swinging stops are provided, one for the upper rack consisting of a rod bent in the form of a bail 48, the free ends of which are respectively pivoted at the opposite ends of the rack 39 as indicated in Figs. 2 and 3. Projecting across the front of the upper rack toward the sliding front door 10 and toward one end of which is pivoted a rod 49 passing downwardly through the angle bar 37 on the end of which rod is an enlargement o nut 50 between which and the angle bar 37 is a spring 51 coiled about the rod 49, the lower end of which when closing the opening of the doorway abuts against the rod 30, the downward movement of the rod l9 being limited by anut or collar thereon at the upper side of the angle iron 37.

Spring 51 normally inclines the stop 41-8 downwardly across the front edges of the wax cases indicated by dotted lines at 53, and maintains the stop in this position until the counter-balance weight 29 strikes the nut or collar 50, and continuously upwardly compresses the spring until the yoke stop is forced above the top edge of the wax plate 53, and by which time the front door 10 has descended far enough for removing the wax cases from between the racks 38 and 39. For preventing the lower wax cases from being pushed in the path of the sliding door, a. similar form of stop 54 has its free ends pivotally secured on pins 55, projecting from the angle or bracket bars 33, at one side of which stop is pivoted a rod 56. provided'at its lower end with an eye 57 embracing and free to slide upon the rod 30, which rod 56 passes through a fixed Z-shaped bar 58 between the upper end of which and a collar 59 is a spring 60. coiled about the rod 56, the normal operation of which is to maintain the stop yoke in its elevated position above the bottom of the rack 34c, and therefore at a point between the front edges of the wax cases 54: and the path of movement of the sliding door. \Vith this construction when access is desired to the wax cases in the lower rack, the sliding door is pushed upwardly from the position shown in Figs. 1 and 2 until its descending counter-balance 29 comes 1n contact with the eye 57, and thereby compresses the spring 60 until the stop 54 is depressed below the bottom edges of the wax plates 53.

Access to the heater structure for the introduction of the wax cases to their operative position therein is provided for by shifting the sliding back door 9 upwardly or downwardly, as may be, and for the con venience of which there are mounted at the adjacent corners of the structure posts 6161 upon which are mounted pulleys 6262, supporting chains 63(33, one end of which is secured to the top of the rear sliding door 9, and the opposite ends to a counter-balance weight (if guided upon the rod 30 whereby the sliding rear door 9 of the structure is' counter-balanced by the same means as is the sliding front door 10.

For a thorough inspection of the several wax cases during the heating process. a substantial portion of both of the sliding doors 9 and 10 is formed of glass, as indicated at 9 and 10, a single pane of glass preferably being used in each door, and as a convenient means for shifting these doors in their guides each door is provided with a handle 65 consisting of a bar supported at its opposite ends in clips 66 secured to the upright side bars of the doors. It will now be observed that by the employment of sliding doors a means is provided for both successfully regulating the temperature of the inclosing structure, and for fix ing the consistency of the layers of wax on their respective cores, and by means of which, the wax surface of the cases in the lower rack may be maintained at the same consistency as those of the upper rack when removing the latter and vice versa. In other words one or both doors may be lowered as much as need be below the top of the heating structure for producing a draft therethrough and reducing the temperature at that point. and on the other hand one or both doors may be elevated to produce a draft of outside a' adiacent the bottom of the rack. supporting the lower tier of wax cases. In ordinary practice. however. the supply and regulation of the temperature of heat and its distribution over and in contact with the wax cases is by means now to be described.

Well toward the bottom, but supported above the same by le s 67 are steam heating convolutes or coils 68, the steam for which is supplied (see Fig. 3) from any a suitable source through an inlet plpe 69, and discharges therefrom through the outletv pipe 70, from which coils the rising heat passes between the rack bar supports therefor and goes upwardly to. the top. of the heating structure where it would be held for artificially compelling its downward movement and circulation, and thereby a substantial uniform distribution ofthe heat over the entire wax surface of the several cases.

For producing the uniform distribution over the wax cases of the heat rising from the steam coils, it is found that by introducing through a pipe 71 air under pressure, and discharging. it thence through a. series of jet orifices 72 in pipes 73 projecting laterally from the pipe 71, a circulation of the heat from the steam coils 68 is pro ducedv uniformly over and in contact with the surfaces of every wax case exposed to such heat, and f-urthermorethat the rising heat before coming. in'contact with any portion of these surfaces is so tempered as to prevent it from being concentrated. both against the surfaces next the coils and those which are adjacent the top of the heat inclosing structure, an additional result of which is also that there is a quicker distribution, of the heat and a reduction of the wax surfaces to their desired consistency than. would be possible in the presence of an otherwise comparatively sluggish rising of the heat from the coils, even without taking into account its concentration and.

84:, or other means adapted for the purpose of their suspension.

hen filling both racks with wax cases the front door 10- should be in the closed position shown in Figs. 1 and 2, for when in this position the stop as for the upper rack, and stop 5-1: for the lower rack are then normally in the position preventing the wax cases introduced at the rear of the structure from coming in contact with any portion of the front door, whereas the rear door may in the meantime be either atits greatest elevated or lowest position.

For withdrawing heated wax cases from the upper rack either for inspection or use, the front door 10 is moved downwardly until its counter-balance weight 29 guided on the rod-30 rises to contact with the col- The air supply" lar 50- on the rod 49, and compressing the spring lifts the stop 48 above the plane of the top edges of the wax cases 53, which is again lowered to its operative position on moving the door upwardly until the spring 51 is permitted to exert its tension and automatically lower the stop 48 to its operative position adjacent the vertical edges of the wax cases. 1

For withdrawing wax cases from the lower rack the door 10 is moved upwardly from the positions shown in Figs. 1 and 2 until its descending counter-weight striking the collar 57 and overcoming its tension, forces the rod, 56 downwardly, and which thereby depresses the stop 5st to, a plane below the bottom edges of. the wax cases in the lower rack. My invention, however, is not limited to the details of construction by which the up and: down sliding movement of the doors of the heating structure auto matically operate stops maintaining the wax cases on their introduction, and while being heated, from contact with such a, door, for my invention inthis respect finds embodiment in any means whereby stops of any construction for this purpose are automatically operated by the movement of the front door of the heating structure whence the plates may be partially or wholly moved for inspection, or for immediate use.

If for any reason it becomes desirable to release heat through the front doorway, the door may be moved downwardly the desired distance for the escape of heat over its top, or moved upwardly for the escape of heat adjacent the bottom supporting rack, and when it becomes necessary to temper the heat either at the top or bottom by means of a direct draft through the racks, the rear door is accordingly elevated or lowered. In this connection it may also be noted that the circulating hot air current produced by the jets of air under pressure either in a heated or cooled condition may be. augmented to any necessary de gree by moving either one of these doors upwardly to form an opening adjacent the bottom rack, and, the other door down wardlv to form an opening adjacent the top of the inclosing structure. In short, my invention provides a means by which Wax cases in large numbers may be simultaneo-usly heated uniformly throughout their entire surfaces, but by which they may not only be quickly heated, but their temperature as quickly reduced when for any reason necessary.

Having described my invention what I claim and desire to, secure by Letters Patent is:

1. An apparatus for heating wax cases comprising an inclosing structure, vertically sliding doors in the front and rear walls thereof, and means whereby each of said CIT doors may be moved to a position above the bottom and below the top of their respective doorways for the purposes described.

2. An apparatus for heating wax cases comprising an inclosing structure, a rack therein adapted to maintain wax cases in spaced, perpendicular arrangement, doorways in the front and rear walls thereof, sliding doors therefor, and a stop between one of said doors and the rack maintaining the doors from contact with wax cases in the rack, and means whereby said stop is actuated by the movement of the door.

3. An apparatus for heating wax cases comprising an inclosing structure, a rack for supporting and maintaining wax cases in a vertical position therein, means located below said rack for supplying a rising heat to the wax cases, and means for introducing between said heating source and the rack currents of air under pressure.

4. An apparatus for heating wax cases comprising an inclosing structure, a rack for supporting and maintaining wax cases in a vertical position therein, means located below said rack for supplying a rising heat to the wax cases, and means for introducing between said heating source and the rack air under pressure, the currents of which rise in the path of the ascending heat for the purposes described.

5. An apparatus for heating wax cases comprising an inclosing structure, a rack for supporting and maintaining wax cases in a vertical position therein, means located below said rack for supplying a rising heat to the wax cases, and means for introducing between said heating source and the rack rising jets of air under pressure in sheet like form, mixing with and ascending with the heated air currents to simultaneous contact with the surfaces of each wax case whereby the heated air is. prevented from concentrating at and toward the upper and lower ends of the wax cases, and a uniform heat is i1nparted to and throughout the Wax surface: thereof.

6. An apparatus for heating wax cases comprising an inclosing structure, sliding doors adapted to be moved both above and below their respective .door openings, a plurality of racks between said doorways, means for sustaining wax cases in parallel, spaced, vertical arrangement in each of' said racks with the wax cases of each rack one above the other, means below said racks for supplying rising heat simultaneously impinging against the metal back and wax surface of every wax case in said racks, and means between said racks and the source of heat supply discharging air under pressure into said rising heat in the direction of its current for the purposes described, and whereby the velocity of both currents and the temperature of the rising heat may be controlled by shifting one or both doors with reference to their door openings.

In witness whereof, I have hereunto set my hand and affixed my seal, this 5th day of September, A. D. 1914.

JOSEPH P. RIVETT. [1,. s]

Witnesses:

MILDRED ELSNER, J NO. G. ELLIOTT.

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

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