US2371677A - Draft regulator - Google Patents

Description

March 20, l945- c. A. cRooKER i 2.371,67?

DRFT REGULATOR 'Filed May 27, 1943 ment and provide 'abearing surface.

` sembly work. i i

Patented Mar. 20, 1945 'U'NITE'DTATES 'PATENT FFI'CEJ f 1 pnAFrRnGUL'roR t `(Lilarertech.Crooker, Marikato`,`Minn.`

` Application May'zv, 1948, fserii'noiesss'zc mi `12 ciaims, ;7(01, ass- 45) o This invention relates to draftjcontrol devices. i

`In mi' prior'PatentNumber 212523125; granted August' 12,'1941, I disclosed a beari'ng construction for 'the pivot means fora 'valvein 'a draft control device. This pivot element included a U- 'shaped piece of metal bolted Vor otherwise se-` cured to the rim of 'the draft control device with 0 an `-aperture through one leg of'the U -shaped piece to receive the pivot pin, the other jleg being solid i to'restrain the pin against longitudinal move- 1one oftne objects 'of the present inventionis to provide pivot means for the valvefmember in the draft'control device whei'ein the `be'aring member A further object of the invention is to greatly i simplify the construction of a draft regulator by reducing the number of parts to a minimum namely a rim, a valve, and a pivot member for the valve. i i l l These and other objects and advantages of the i invention Will more fully appear from the following description made in connection with the accompanying drawing, wherein like reference characters refer to the same parts throughout the viewsy` and, in which:

Fig. 1 is a side elevation of a portion of a fiue with a lateral branch section and my regulator thereon, a portion of the branch being broken away and the regulator being shown in section with an alternate position of the valve in dotted lines; i p

Fig. 2 is a front elevation of a regulator mounted on a fiue;

Fg. 3 is a top view of the regulator showing it mounted ona short section of pipe; i

Fig. 4 is a front elevation of a modified form of the deviceiand o i Fig. 5 is a side view thereof. w

In the drawing there is shown a Vertical fiue section 6 having avshort T` section 1 extending outwardly therefrom.` The outer end of the T section 1 is provided with an outwardly directed fiange 8. i o i The regulatoriincludes a rim 9 which is annuiar ana fiat with a. reienveiyiaree centri opening. At spaced points aboutthe rim tongues w 'HI are'struck fromthe ``metal of the rim and as j showntheir free endsare directed radialjly in-` i D wardly to the center of the rim 9. It's'hould further be noted thatthe tongues lll extendgoutwardly from the main body of the rim'at a rather abrupt angle i and thence'radially inwarclly,`` i spaced relation to the back of the rim so that'the ""f main body of the rim will lie Vagainst the surface o of the short pipe section, and the inner or the' o free `ends of the tongues will lie behind the flange` W 8. `The rim is thereby supported 'on the fiange 8` and slidably Arotatable thereon. Due ``to the fact T5 that the rim.` 9 is fiat andU made of' sheet metal H it can be sprung slightly so thatithe tongues 110 i canbe slipped behind the flange 8 on'fthe'short pipe section T. This affords an extremelysimple v and e'conomical means for rotatably mounting a `regulatorrim 'on a flanged piece'of smoke j'pipe.``

Preferably located above the horizontal center line of the rim 9 is a pairof tongues and |2. Similar tongues are disposed on the opposite side `of the rim as best shown in Eigs. 2 and 3. 'Their 2W tongues |2 are provided with tapered apertures |3 to receive the ends of a pivot rod or pin 14,

The rod |4 extends through the tongues |2 and is of a length approximately .the same as the distance betweenthe inner faces of the outer tongues I I. The ends of the rod |4 are preferably pointed as shown in Fig. 3 so that there is little frictional contact between the rod |4 and the tongues ll. Friction is reduced also by'the tapering ;of the apertures l3 in the tongues l2 and there is no pocket or other collectingplace for soot'and dirt which might interfere with proper movement of the pivot rod |4 in the bearing tongues ll and |2,

A valve member l5 is positioned` in the aperture lprovided by the rim 9, and said valve mem- 40 ber, as shown in Fig. 2, is preferably of slightly` extends` through the tongues IB and is securedv to saidtongue IG by soldering, welding or other suitable means; Thus the valve member [5 is held in position by the rod |4 and is permitted `to swing with said rod to close or"partially open the aperture defined by the rim 9.'

In order to give the valve 15 a greater range of swinging movement I provide cut-outs H in the valve member |5 so that said valve will not so quickly strike against the inner edge of the rim 9. However, after a certain degree of swing the` provide a limit stop for the valve.

While I have shown the cut-outs vl'l in the valvemember 15 they could, of course, be conveniently made in the rim 9 with the same function and effect.

In order to prevent the lower portion of the valve |5 from swinging outwardly I provide a stop in the form of a tongue IB which is struck from d ,thelower portion of the rim 9 and bent outwardly 'and upwardly against the face of the rim and inwardly beyond the inner edge of the rim' to lie in the path of movement of the lower portion of the valve l5.

It will be seen from the foregoing that I have provided a draft regulator made up of three parts,

a rim, a pivot pin, and a valve element. The rim includes' integral means for rotatably positioning the regulator onithe end of a short pipe section or T so thatit canV be twisted to various positions to alter. thel effective weight of the pivot valve. Said'rim also includes integrally formed bearing members for the pivot pin or rod and itV further 'includes an integrally formed stop member to limit swinging movement of the valve in one direction.` The pivot'pin is supported by the integrally formed bearing elements and it in turn is connected to the valve'to support it for swing- Vifng movement. The structure is so greatly simplified that it can be manufactured at extremely .10W cost and its few separate parts make' the matter of assembly extremely easy. p

' in'Figs. 4 and 5 there is shown a slightly modified form of the invention, the difference lying in the arrangement of'the pivot member. In that 'formy it is shown to be a generally V-shaped element l9 which is welded or otherwise suitably secured to the valve member |5 and which has outwardly bent arm portions which extend through the bearing member |2 as in the case of I edges of the cut-outs ll will engage the rim 9 to the straight rod 14 in Figs. l through 3. The V- shaped pivot member |9 is ofiset as at 2| since the lower portion is fiat against the valve IS and the upper portion'must be set out to coincide with the apertures in tongues l2. This construction provides more weight in the lower portion of the valve than in the case of the device shown in F'igs. 1 through 3 since there is a considerable portion of the pivotl member I9 below the pivotal axis of theuvalve. The remaining features of the device, however, are the same as those shown in the first embodiment.

While I have shown two forms of the invention it will, of course, be understood that various changes may be made in the form, arrangement, details and proportions of the various parts without departing from the scope of my invention.

WhatI claim is:V

16 A draft regulator comprising, a pipe section having an outwardly directed flange thereon, an annular rim having tongues strucktherefrom at spaced points vto provide pipe fiange engaging means, said rim also having apertured tongues .struck therefrom to provide bearing elements, a

pivot p pin in the apertures of said bearing elements, stopmeans adjacent said bearing elements to limit -axial movement of said pivot pin, and a valve member swingably'supported in said rim by said pivot pin.VI i o 2. A draft regulator comprising, a rim, aligned oppositely disposed pairs of said tongues struck from and extending at right angles to the plane' of said rim, the innermost of each pair of tongues having an apertureptherein, pivot means extending through saidV vapertured tongues, the outermost of said tongues restraining said pivot means against outward endwise movement, and a 'valve member mounted on said pivot means within said rimfor swinging movement relative to said rim.

` CLARENCE A. CROOKER.

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