US1604197A - Radiator - Google Patents

Description

ed. ze, 1926.

1,604,197 s. w. RUsHMoRE RADIATOR` Filed Nov. 18, 1922 ,/y-ff7 WIH 5 5 2a @bww/11206 i, W MlLg-Atwwly Patented oa. 26,1926.

SAMUEL W. RUSHMORE, OF PLAINIELD, NEW JERSEY.

RADIATOR.

Application tiled November 18, 1922. Serial No. 601,683.

My present invention relates to radiators of a type principally used on trucks, in which there is a rigid cast metal frame surrounding and supporting the relatively thin air-cooling elements. Usually the frame is made up of four integral castings,the radiator top tank, the bottom tank and two intermediate side frame members yspacing apart the top and bottom membersv and framing in the core or honeycomb. the core consists of vertical tubes which are secured water-tight in slightly resilient brass top and bottom plates bolted to the top and bottom castings. This makes a very rigid construction well adapted for rough usage but greattrouble has been experienced from breakin of the little tubes or their connections w1th the top and ybottom plates. This may be caused merely by the excessive vibration in use but an important contributing cause is differential expansion or contraction, as when' the tubes become very hot while the side frames'are cold. The cold tends to shorten the side castings'while the heat lengthens thev tubes. This, especially when combined with the vibration Aon rough roads', puts a great strain on thel point where the tubes are brazed or soldered to the brass top and bottom plates because the space between these plates is rigidly fixed by the length ofthe side castings. Consequently eitherwith or without vibration the soldering may be cracked or the tubes broken.

An extreme condition of this .kind "is 'where radiators of this rigid frame type are` top Aand bo used for up-low condensers for steam in accordance with the method set forth in my prior Patent No. 1,378,724, granted May 27, 1891. Under such conditions if the radiator has been assembled without stress at a normal' temperature of say 70 F., copper tubes say 24 inches-long will expand say .03 inch and the side castings will contract .012 inch,

a total.I difference of .042 inch. That isl to say the tubes may be nearly one-sixteenth of an inch longer than the-distance between the ttom plates as determined b the length of the side castin The tplgtes ing Substantially rigidly he d some teenth of. an inch diterential expansion,

.with vibration, breakand when thecore consists ofthe cellular or .honeycomb b1ock.'.In such case instead of Usually giras to In pract1cen1`uch less than onefsixf Ymunicates Vwith the lower ta -lower plates respective breaking the small tubes, the core block tends to be ripped away from the bottom plate.

My invention for obviating the above and other difficulties contemplates raising the bottom plate in which the vertical tubes are secured some three or four inches, preferably making it in the form of an inverted trough or tank with an edge ange. The flange corresponds to the edge of the bottom plate which it is now customary to bolt to the bottom tank casting, and the sides of the inverted tank-like structure are made springy preferably by horizontally molded" curves or corrugations to allow a certain amount of elastic vertical movement of the bottom plate to which the tubes are secured, with respect to the flange by which it is rigidly secured ,tou the frame. This permits unequal or opposite ex ansions and contractions of the tubes wit .respect to the side castings, without imposing any serious strain.

The top sheet could, of course, be similarly made in trough or tank-like form with corrugated sides, either as a substitute for or in combination with the corrugated tank struc-` ture at the bottom.

Thus the invention a plies to that class of i radiators in which ri'gi top and bottom tankw castings are connected by rigid side members and where temperature changes in the core and side members are notuniform.

My invention may be more fully understood from the following description in connection with the accompanying drawings, in which Fig. 1 is a sectional elevation showing one embodiment of my invention.

llfig.v 2 is a'section on the line 2 2, Fig. 1, an

Fig. 3 is a sectional detail showing a modificatlon. v

In the drawing the-upper tank 1, lower tank 2, and side members 3, 4, are each integral castings, rigidly bolted together. The bottom of upper tank l is formed by the top plate 5 of the core and the top of the bottom tank is formed by the bottom plate 6 of the core. The up r tank comthrough the tubes 7, 7, the ends of which are expanded,

roesA welded, brazed,l or otherwise secured water tight in perforations 8V 9, in said uplper and l ere are Usuall sheet metal fins 9 which are cool Il()v ed by'thew" air draft and which are in'intimato contact lexpansion and contraction is taken care of by flexing of the corrugations Without imposing any serious strains on the vertical tubes 7, 7. f

The inverted trough construction increases the space in the lower tank and this is of.

advantage as aifording more space for steam separation in case the radiator is used as an up-iiow condenser.

15, 16, are the usual lugs for supporting the weight of the radiator on the frame members of the truck and 17 is the filler pipe adapted to be closed by a rap.

18, and 19, may be respectively inlet and out-let for circulation of the cooling medium through the bottom of the radiator.

Fig. 3 shows a modification in which the bottom plate 6a of the core is in or near the same plane with the margin portion 14a, which is clamped between the rigid side member 3lL and the bottom tank 2a. In this case circumferential corrugations 13a are formed between clamped margin and the base of the nearest tube. This may be designed to afford the proper degree of springiness without sacrificing so much space as is required for the inverted trough construction.

I claim:

1. A radiator comprising an air-cooled core and a frame surrounding and protecting the same, the frame' including castings constituting top andbottom tanks and rigid side members, to the respective upper and lower portions of which castings the top and bottom plates of the core are secured, the bottom plate being in the form of an inverted trough or tankhaving resilient corrugated sides and a. marginal iange extend-l ing from the lower edges of said sides and secured inixed relation to the bottoms of said rigid side members.

2. A radiator comprising rigid top and bottom tank members Aspaced apart b y rigid side members constituting a frame, 1n com-v bination with a radiator v core having top and bottom plates respectively secured t0 the upper and lower tanks, one of said plates having -a corrugated resilient connectop and bottom tion between its tube engaging area and the mzrilil'ginal area whereby it is secured to the ta 3. A radiator comprising rigid to and bottom tanks spaced apart by rigi side members constituting a trame, in combination with a radiator core having resilient top and bottom plates respectively secured to the upper and lower tanks, the bottom plate being the bottom of an inverted trough or tank witlii' corrugated sides secured to the bottom tan 4. A radiator comprising an air-cooled core and a frame surrounding and protecting the same, the core being of a type in whichstraight radiator tubes are secured in resilient top and bottom plates, the frame including top and bottom tanks and rigid side members, to the respective upper and lower'portions of which side members the resilient top and bottom plates of the core are secured, one of said plates being in the form of a trough `or tank having resilient corrugated sides connecting it to said side members.

5. A radiator comprising an air-cooled core and a frame surrounding and protecting the same, the core being of a type in which straight radiator tubes are secured in plates, the frame including top and bottom tanks and rigid side members, to the respective upper and lower portions of which side members the top and bottomplates of the core are secured, the bottom plate being in the form of an inverted trough or tank having resilient corruf gated sides and a marginal flange extending from the lower edges oflsaid sides and .secured in fixed relation to the bottom of said side members.

6. A radiator comprisingrigid top and bottom tanks spaced apart by rigid side Amembers constituting a frame, in combina- .tion with a radiator core of a type 1n which straight radiator tubes are secured in resilient top and bottom plates, and having its top and bottom plates respectively secured to the upper and lower tanks, the bottom plate being the bottom of a trough or. tank `with corrugated sides secured to the bottom tank.

Signed at New York, in the countyof New York and State of New York, this sixteenth day of November, A. D. 1922.

l SAMUEL W. aUsHMoRn.

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