US1040623A - Expansion-joint for integrally-cast structures. - Google Patents

Description

G. F. CODA.

EXPANSION JOINT FOR INTEGRALLY CAST STRUCTURES.

APPLICATION FILED SBPT.11, 1911.

1,040,623. Patented 0013.8,1912.

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COLUMBIA PLANOUIMPH (20., WASHINGTON, n. c.

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CHRISTOPHER F. CODA, 035 DETROIT, MICHIGAN, ASSIGNOR TO THE ART STOVE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF IVIICHIGAN.

EXPANSION-JOINT FOB INTEGRALLY- CAST STRUCTURES.

Specification of Letters Patent.

Application filed September 11, 1911.

Patented Oct. 8, 191.2.

Serial No. 648,627.

To all whom it may concern:

Be it known that I, Ciims'rornnn F. Conn, a citizen of the United States of America, residing at Detroit, in the county of WVayne and State of Michigan, have invented certain new and useful Improvements in EX- pansion-Joints for integrally-Cast Structures, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to cast metal structures in which there is a differential expansion and contraction caused by unequal heating.

It is the object of the invention to maintain an integral construction and at the same time to provide for the independent contraction and expansion of portions thereof, and to this end the invention consists in the structure as hereinafter set forth.

In the drawings,-Fig1u-e 1 is a plan view of a cast metal furnace ring constructed in accordance with my invention; Fig. 2 is a cross section on line rc-m Fig. 1 illustrating the manner of forming the structure; Fig. 3 is a similar view showing the complete structure.

My invention is particularly applicable to stove and furnace constructions in which :ast metal parts are employed and which are subjected to unequal heating effects. Thus in furnace constructions it is usual to provide cast metal rings at the bottom and the top of the sheet metal jacket for holding the latter in position. These rings in use are frequently cracked and broken by the differential expansion in the outer and inner portions thereof.

As shownin Fig. 1, A is a furnace ring having an inner annular portion B which is connected to the outer annular portion C by a plurality of cross connections D, E, etc., with open spaces F therebetween. The ring 'is further provided with beads or flanges G and H, the former surrounding the open spaces F and forming a guide for engagement with the sheet metal jacket.

The connecting portion 1) which is arranged in front of the furnace is of considerable width, but the portions E are only employed as cross connecting supports and are comparatively narrow. Nevertheless, these cross connections as usually constructed will transmit the expansion stresses caused by the heating of the inner ring to the outer ring section, frequently producing a strain which will crack the casting. \Vith certain constructions this defect has been avoided by dispensing with the integral cross con nections E and providing adjustable cross braces, bolted or otherwise secured in posi tion, but this complicates and increases the expense of the construction. lhave avoided this dilliculty by the following method of construction: In the pattern from which the ring is cast the connecting portions E are formed of two overlapping lugs or cars E and E respectively projecting from the inner ring section B and the outer ring section C. These lugs or cars when the pattern is first formed lie adjacent to each other, but they are subsequently sprung apart and a core-print I is placed therebetween. lVhen the mold cavity is formed, a core preferably formed of a metal plate coated with sand is placed in the cavity pro duced by the print I, and thus whenthe casting is made the ears E and 11 will be supported from each other by this core. The core is then driven out and the spring of the casting will be sufficient to permit the cars E and 1G to come in contact. These ears are also formed with elongated registering apertures J therein which are adapted to receive a bolt K by which the ears are clamped together.

In the complete casting the overlapping ears E and I1 clamped together by the bolt K will form just as strong a supporting connection for the outer and inner sections of the ring as where the integral strut is used. When however, the casting is heated and the inner portion is expanded the slot J will permit an adjustment which will relieve both inner and outer sections from stress.

WVhile I have described the specific construction of a furnace ring it is obvious that my invention is ap ilicable to other uses.

W hat I claim as my invention is:

1. An integral casting formed with spaced portions with overlapping portions connecting said spaced portions, and clamping means for said overlapping portions.

2. An integral casting formed with spaced portions, and overlapping ears projecting oppositely from the respective spaced portions, and clai'nping means for securing said ears, permitting a relative longitudinal adjustment thereof.

gaging said apertures andseouring said ears' together.

4. An integral casting formed with spaced inner and outer portions, and an expansible in connection between said spaced outer and inner portions comprising overlapping ears having reglsterlng bored apertures therein, and a clamping bolt passing through sald apertures and securing said ears together.

1 ,oeoees 5. A furnace ring formed with an inner annular portion and an integral outer annular portion spaced from each other, and an expansible cross connection between said spaced portions comprising overlapping' ears, and clamping means for securing said ears to each other providing for independent longitudinal movement. 7

In testimony whereof I atfiX my signature in presence of twowitnesses.

CHRISTQPHER F. CODA.

Witnesses:

JAMES P. BARRY, DELBERT COLLINS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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