US1286746A - Means for anchorage for enameled-metal-ware parts. - Google Patents

Description

O. M. OTTE. MEANS FOR ANCHORAGE FOR ENAMELED METAL WARE PARTS.

APPLIQATION FILED JULY 22.1911 3. 1,286,746.

Patented Dec. 3, 1918.

2 SHEETS-SHEET 1.

55 L Q anuwntoz E HAW 22 aka/nag WM? ww 0. M. OTTE.

MEANS FOR ANCHORAGE FOR ENAMELED MET'AL WARE RARTS. I

' APPLICATION FILED JULY 22. 1918.

1,286,746. 7 Patented Dec; 3, 1918.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

01530 M. own, or JAMEs'rown, NEW YORK.

\ MEANS FOR ANCHORAGE FOR ENAMELED-METAL-WARE PARTS.

Specification of Letters Patent.

Patented Dec. 3, 1918.

Application filed July 22, 1918. Seria1 No. 246,245.

. of Anchorage for Enameled-Metal-Vare Parts, of which the following, taken inconnection with the accompanying drawings, is a specification.

The invention relates to means for fastening or attaching enamel metal ware parts to a support; and the improvement consists in providing concealed stooled, bridged or strutted clips or brackets having a spaced attachment to a metal sheet or part, the braces or legs having contacting surfaces on said sheet or part of small size preferably about equal in area to the point of the copper electrode in the spot welding machine, thereby reducing to a minimum the mass of metal abutting and allowing the cooling of the enameled metal steel to be practically uniform at all points, thereby removing stresses or strains caused by unequal heating or cooling during the processes of enameling, the clip or bracket connection being so shaped that an additional cooling area of metal is placed immediately adjacent to the attaching braces or legs, thus overcoming said unequal heating or cooling where the thickness of metal has been increased by the attachment of said clips or brackets, and thereby providing said attaching clip or bracket in a definite spaced relation to the main sheet of metal prior to its enameling so that it may be subjected to the require ments in the process of vitreous or high heat enamel on steel preventing buckling, twisting and raising even in thin metal sheets when subjected to approximately 1600 degrees Fahrenheit as required for said vitreous enamel on steel, the gage of metal in both sheet and bracket being preferably the same, said clips or brackets preferably having openings between the braces or legs to better equalize said stresses and strains by freely admitting the air between the bracket and sheet at the points of attachment.

This method or means of concealed attachment is used for enameled plates on stoves, enameled refrigerators, cabinets and tops and shelves of enameled hospital fixtures of all sort; also for enameled sliding tops on metal kitchen cabinets, tables and similar articles of furniture to which said clips or brackets may be attached by means of screw bolts, pins or rivets; and the invention consists in the novel features and combinations hereinafter set forth and claimed. In the drawings, Figure l is a perspective v1ew of the preferred form of the attaching clip or bracket for enameled plates or metal ware showing the stooled or spaced attachment to a portion of the plate and the slotted openings for attachment of the bracket to a support as desired; and Fig. 2 is a perspect1ve view of the bottom of the preferred form of said bracket; and Fig. 3 is a similar view of the bottom of said bracket showing three attaching stools having level faces and different shaped cooling openings-therebetween; and Fig. 4 is a sidewise elevation of said preferred form of bracket showing the spaced relation between the enameled plate and the bracket by means of the strutted or stooled arrangement, the doubly enameled plate being shownin section. Fig. 5 is a sectional view of the enameled plate for a sliding top of a table or similar article showing the attaching brackets in section at lines 55 in Figs. 1 and 3 for different styles of sliding ways and channeled supporting strips which stiflen and hold the enameled plate in line. Fig. 6 is a sectional view of the enameled plate showing a modification of the preferred form of bracket; which modification is further illustrated in Figs. 7 and 8 showing a rectangular bridged or stooled bracket by means of corner legsline 1010 in Fig. 9 of said modification showing the welding point and the point contact of the side braces. Fig. 11 is a further modification of the design of bracket shown in Figs. 9' and 10 in which two outwardly turned attaching or welding lugs are provided. Figs. 12, 13' and 14 showpers ective views and an elevation of a'modf cation 'of the preferred form of clip or bracket clip -or bracket of enlargedsize, the' sheet contacting surface being elongated and: the

cooling opening between said stooled contacting surfaces enlarged in the elongated clip or bracket. Fig. '15 is an}e1evation.of*

sa1d modified form of clip or bracket shown in Figs. 9 and 10'a's attached in spaced rela tion to a table top or other metal, plate preparatory to' the concealed attachment of the same to a support. 1 Like characters of'reference refer .to cor responding parts in theseveral views.

The numeral 20 designates the metal plate usually "of sheet steel and ofttimes of light gage to which is attached in spaced relation a strutted or stooled clip or bracket-as here inafter described.

In the preferredform of bracket 21 or 22,

the sheet metal plate 20 has the opposite surat 31 in Fig. .4. This arrangement permits.

the easy withdrawal of the punch from thecups 27 and the cupping bracket 21 whether two or three or more cups 27 for legs 25 are shown in Figs. 1-5 in order to. provide a provided. Part of said cups are shown straight, instead of inclined as shown in Fig. 70

- bridged clip or bracket 32 in which the legs 'extend'down from both ends of a rectangu= lar shaped plate or clip which "is thereby bridged in its attachment toithe sheet metal plate 20, the pointsof welding attach nent 33 being. made with a small area so as to provide as small an extra heated surface as 85 possible and has" largeadditional cooling area of metal in the bracket 32 immediately face from that to which the bracket 20 is attached provided with a heavy vitreous or .high heat enamel coating 23v while the surfaceto which the bracket 21 is attached is usually uncoatedas shown'in Figsil and 5,-

though a-lightcoat 24 is shown in Fig.4 on the attaching side-for the clipof bracket 21.

The bracket 21, or 22 is provided with aplurality of spaced legs'25 preferably having a cooling opening or openings 26 therebetween to admit the air to the space between the bracket 21 and the metalplate 20 during the process of enameling, the bracket 21 being attached to the plate 20 before enameling. The legs 2'5-of the bracket 21 are pref-' erabl'y provided by a. multiple punch in a die press which shapes'said legs 25 exactly alike with each of said legs havin t .a flat level contacting surface or face for t e plate 2 0 about the size of the spot-welding tool .So

that said tool may be inserted in .the cup'27 formed .by the punch in shaping the leg 25,

- a multiple point spot welding tool being to bu cordinglysmall pointed copper electrodes z are used in the spot welding machines and the foot of- thelegs 25 or 33 are about equal preferably used having a series welding con- -tact.

,The sides 30 of the bracket 21 are pref erably made in the triangular shape so as to brace the bracket and at the same time provide a braced connecting side having the slots 28 and 29 preferably in right angle relation therein for attachment by means of screw bolts or rivets to a channel strip 36 or sliding way 43 or other support. The triangular sides 30 of thefpreferred' form of bracket brace the bracket so strongly that the same cannot bend or get out of order to make this preferred form of'bracket from the fiat sheet metal in one operation,

a die is provided which punches the legs me. In

25 at a slight angle of inclmation as shown triangular sides or wings 37 are given a downward squarely against the plate 20 when attached port to which the bracket 34 is attached.

in area to said electrode points. Another modification of the preferred form of bracket is shown at 34 in Figs.9, 10,

11 and 15 in which the substantially triangu- .lar design of the preferred form of bracket I is shown. The modification cuts away the base plate with the exception of an attaching lug 35 which is angularly shaped so as to weld to the sheet metal plate 20 and has the 2 vertical and horizontal slots 28 and 29.-

therein for attachment'to a channel stri 36 orsimilar support or attaching means. he

inclination so as to brace thereto-and gives a strong holding attach- .ment toicertain. kinds of supports especially those wherein the points of the wing's 37 are braced against plate 20 and a 'holding sup- For certain purposes two end lugs may be provided in place of the single "central lug 35 thereby givinga stronger a achment to them etal plate 20.

. The preferred form of holding bracket 21 "T .may be doubled in its holding. capacity as shown in Figs. 12, 13 and 14 in which a screws, bolts and similar means.

cealed attachment also leaves the enameled double set of slots 28 and 29 are provided and elongated cups 39 and le s 41 with the large cooling opening 40 there etween. The slots 28 and 29 permit the adjusted attach-. ment of the channel strip 36 or other holding means to which the bracket or brackets are attached so that said strip 36 may be attached in contact with the enamel plate 20 or a spaced distance therefrom.

The space 42 between the metal sheet 20 and the clips or brackets 21, 32 and 84 is provided in order, first, to prevent said unequal cooling; and second, so that a coat of enamel may be applied on the side of the metal sheet 20 adjacent said brackets; and third, so that said enamel may be blown out from beneath said brackets and sponged off after di ping when it is desired not to coat the brac eted side of the metal plate 20. It is apparent that this construction provides a simple and strong concealed attachment for the vitreous enameled parts without danger of chipping or cracking said enamel during said attachment, as is the case with Said consurface smooth and clean without'unsightly screw heads or attaching plates.

I claim as new 1. An anchorage for enameled parts comprising an attaching clip or bracket welded in spaced relation to the metal sheet before enameling to prevent distortion of said metal sheet under the high heat of the enameling process. 7

2. An anchorage for enameled parts comprising attaching clips or brackets attached to the metal sheet to be enameled in stooled rela-'- tion thereto before enameling to prevent distortion of saidsheet under the high heat of the enameling process.

3. An anchorage for enameled parts comprising an attachlng clip, spaced legs on said clip, a metal sheet to be enameled, said spaced legs welded to said metal sheet before enameling to hold said clip and metal sheet in spaced relation and permit air coolin and thereby prevent distortion of the sald metal sheet under the high heat necessary for enameling.

4. An anchorage for enameled parts comprising a metal sheet to be enameled, spaced attaching clips or brackets for said metal sheet, spaced legs on said clips welded to said metal sheets before enameling to hold said clips and metal sheet in spaced relation to prevent distortion, said clips having openings therein between saidspaced legs to admitfair'circulation around said legs close to the welding points to overcome the unequal cooling of the doubled sheet metal at the point of attachment.

5. A concealed anchorage for enameled parts comprising a metal sheet to be enshaped by a punch press die, said clips attached to said metal sheet'on its unexposed side by spot welding through the bottoms of said cup-shaped'legs.

6. A concealed anchorage for enameled parts comprising a metal sheet to be enameled, and sheet metal attaching clips or brackets attached to said metal sheet in spaced bridging relation on its concealed side by means of spaced legs welded to said metal sheet through their contacting feet before enameling, said space between the sheet and clips or brackets being provided to allow blowing of the coating formed by the enameling solution from beneath said attaching clips or brackets and the wiping of said solution from the remaining concealed side of said metal sheet, and also the subjecting of said clipped or bracketed metal sheet to sufficiently high heat to change said solution to hardenamel. 1

.7. A concealed anchorage for enameled parts comprising the metal part to be enameled, an angular attaching clip or bracket having triangular shaped bracing ends struck from sheet metal, cup-shaped legs struck up in said attaching clip or bracket by a suitable punch press die, said legs attached to said metal part to be enameled by spot welding through the fiat bottoms of said metal cups, said clips or brackets having openings therein for attaching bolts.

8 A concealed anchorage for vitreous enameled parts comprising the metal plate to be enameled, cupping angular clips or brackets having a flat base and straight side angular to said base, said straight side hav--- ing angular slots therein for attaching bolts, a plurality of cup-shaped fiat bottomed legs struck up in spaced relation in said flat vent distortion-of the latter under the high heat of the enameling process. I

10. An anchorage for enameled metal parts including an attaching element and means whereby to. weld said element to the metal parts before enameling and with space in free communication with the surrounding atmosphere between the element and parts to prevent distortion of the latter under the I tion of the parts under th'e'high heat of the high heat of the enameling process. enameling process. v

' 11. An anchorage for enameled, metal 'In testlmony whereof I have aflixed my parts including an attaching element, and signature .in the presence of two witnesses. 5 means whereby to weld said element to the OTHO M. OTTE."

metal parts before enameling and with the Witnesses: I -points of weld completely encircled by the H. A. SANDBERG,

surrounding atmosp ere to prevent distor-' I I. E'. Nonnsmom-

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