US1239510A - Door-check. - Google Patents

Description

R. E. I. NOHDQUIST.

DO0R CHECK.

APPLICATION FILED APR. 26. 1915.

Patented Sept. 1l', 1917 QQ" N W being inserted in the N unirnn srarns arriver nieren RONALD E. J. NORneUisT, or OAK PARK, ILLINOIS, ASSIGNOR TO THE NILES IN- VISIBLE DOOR CHECK COMPANY, OF NILES, MICHIGAN, A CORPORATION F MICHIGAN.

Ihiil.

.To all whom t may concern:

Be it known that I, RONALD J. Nonn- Quis'i, a subject of the Kil'ig` oit' Sweden, re= siding at Oak Park, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Door- Checks, of whichV the following is a speciiication. i,

This invention relates to Vdoor checks and is an improvement upon the invisible door checks shown4 in several prior patents. The object of the invention is to provide a novel form of vaive device controlling the opening or passageway within the lcheek through which liquid flows in the usual manner, to control the movement oit' the door, this valve device being' so arranged that while a ormal speed of door movement is maintained under ordinary conditions the valve may, under eXtreme pressure upon the door, yield to allow a more rapid movement of the door and thus avoid injury to the checking device; this in combination with automatic means for varying the normal opening of the valve and with means operatable from out` sidethe `device for adjusting said opening` The invention consists in a device capable of carrying out the foregoing objects which can be very easily and cheaply made andinstalled, which is satisfactory in operation and is not readily liable to get out of order. Theinvention further consists in the teatures and details ofconstruetion hereafter vmore fully set forth in the specification and claims.

In the drawings,

Figure l'is a sectional view of mechanisml illustrating this invention applied to a door,

the door being shown in closed position. i

Fig. 2 is an enlarged detail view of the right hand portion of Fig. l; the inner end of the check showing the parts in the posi? tion which they assume when the door is open.

Fig. 3 is a view corresponding` to Fig. 2, showing` the parts in intermediate Aposition between that of Figs. l and 2.

Fig. 4l is a sectional detail view onthe `line lh, of Fig. 2, and

Fig. 5 Fig. 3. y y

As inail door checks of this class, the mechanism includes a pair of plates l() vand l2, placed opposite to each other, the former door j amb 14, the latis an end view on theline 5-5, of

Specification of Letters Patent.

DOOR-CHECK.

ratemea sept. ii, iai t'.

Applieatin filed April ze, 1915. serial No. 24,140.

ter in the door` 16, and the plate l2 carryingl the door check case consistingI broadly oi the housing` 18, tubular member and closing cap 22, of ordinary construction. Similarly, 'as in the old art, the check has a piston rod 2l slidable through a suitable packing 26 in the left hand end of the check, the left end of this rod 24 being connected by a link 28 to a post 80 on plate l0, the result being that as the door 16 is swung on its hinges forward and backward from closed to open position, the rod 24C is reciprocated backward and forward within the check cass ing between the positions of Figs. l and The packing 2G is spaced from the piston rod 24, 'and paekingglands 26 and 2Gb are secured in. each end of the packing 26 around the piston rod, thereby forming a chamber 26C around the piston rod between the said glands, so that the oil which may seep through in the course oi time, instead of escaping into the outside atmosphere, where it will 'gum and harden, is caught in the said cham-ber. Such oil as does pass into the chamber, moreover, serves to lubricate the piston rod, 'and is likely to pass out of the chamber and back i-nto the casing oi? the check. This packing is, to anything in the prior art and tends to keep the check in working order for a much longer period of time than has been possible with any construction heretofore known.

In the device illustrating this invention in its vpreferred form here shown, an internal head 32 is rigidly attached te the inner right hand end oi the casing 20 and parts 1S and 32 are connected together within the casing by two oppositely placed tubular members 34 and 36. Inclosing these two tubular members, just mentioned, are coiled springs 3S and bearing at one end against member 1S and `at the other end against a flange or crosshead 42 carried cn the end of an inner cylinder i4 screw threaded onto the right hand end of piston rod 24k at 4G, the result being that, under normal conditions, the springs 3S and 4L() press the cross-head 42 and consequently the cylinder 44 and rod 24; to the right, as viewed in the `figures, until all of the parts reach the position of Fig. l and the door is closed; in other words, springs 3S and 40 are the door control springs.

,Through 'the left hand end or head of cylinder 44 is a port or passageway 48-50 controlled 'by a ball valve'52. Rigidly attached llO to the internal head 32, heretofore referred to, by any suitable means, such for instance as screw threads 56, is a cylinder 58 concentric with cylinder 44 but loose enough inside of movable cylinder 44 so that the latter may freely slide over this cylinder 58. About the left hand end or head of this inner cylinder 58 is a packing device 60 of any suit able construction, while through the center of this head is a port or passageway 62. Cylinder 58 is provided with a discharge port 66 and cylinder 44 is provided with a similar port 68, permitting oil or other working iiuid which'has passed from left to right through passageway 62, in the manner hereafter de scribed, to return into the main interior chamber of the check case, ready to be used again in the manner well known in the art.

The outer or right hand end of head 32 is provided with a suitably formed recess 70 within which is located a lever 72 pivoted at 74. Through this lever 72 near pivot 74 is inserted a valve rod 76 provided at its right hand end with a head 78 which bears against the lever 72 and at its opposite end with a point 8O entering and moving within cylinder 58 and adapted to control the right hand end of passageway 62, heretofore described. On this valve rod 76 near its left hand end is a shoulder 82 and between this shoulder and the adjacent member 32 and within the cylinder 58 is placed a coiled spring 84 which, in the obvious manner, tends to force valve rod 76 to the left, as viewed in the figure1 and consequently force the point 80 of said rod to seat itself in, and close the end of passageway 62.

Pivoted at 90 in the head 32 is a lever 92 having a hooked end 94 engaging and bearing against the lower end of lever 72, and an opposite end carrying a cam 96 lying inside of tube 36, heretofore referred to, adapted to be engaged by a cam lug'98 mounted upon cross-head 42 and traveling backward and forward along the bottom edge of turbe' 36, the cam lug 98 entering said tube through a suitably formed 96 and cam lug 98 are so arranged, shaped and located that when the parts are in the positions of Figs. 1 and 2, the lever 92 is not materially affected by the cam but that when the parts are in the position shown in Fig. 3, member 98 engages cam 96 and eleva'tes it as shown in Fig. 3, thus rotating lever 92 in a clockwise direction about pivot 90 and thus correspondingly rotating lever 72 about pivot 74. This movement of lever 72 obviously moves head 7 8 on valve rod 76 to the right thereby withdrawing point 8O of rod 7 6 from its seat thus increasing the amount o-f liquid which can flow through passageway 62.

Extending through the inside of tube 34, heretofore described, is a rod 110 carrying on its left hand end a head 112 provided with slot 100 therein. This cam,

a screw driver notch 114 adapted to be engaged by a screw driver in the hands of an operator standing at the edgeof the door. Other means for adjustably rota-ting this rod 116 may be provided withoutdeparting from this invention. Means1 such as the ring 116, isvprovided for preventing longitudinal movement of rod 110 without interfering with its rotation. Suitable packing devices 120 may also'be provided for this rod 110 when and if desired.

The right hand end 122 of rod 110 is made non-circular in cross-section and it enters a block 124 screw threaded at 126 into head 32. The result of the foregoing construction is that an operator, by turning head 112 of rod 110, may turn block 124 and cause it to move in and out of member 32 on screw threads 126.

Screw threaded into block 124 is a bolt 130` whose non-circular head 134 lies in the U- shaped recess formed in the upper end of lever 72, the fit of the parts being such that the lever 72 may freely` rock on pivot 74 so long as the bolt head 134 is in its normal position shown in Fig. 5, but the screw or bolt 130 can not be rotated; in other words, this means is provided for holding bolt 130 stationary while block 124 is rotated and consequently the relationship longitudinally of the bolt and block is regulated. Extending transversely of the bolt` 130 are horizontal arms 138 against which the lever 72 bears.

From the foregoing, it is seen that the arms 138 on bolt 130 form a stop limiting the movement of the upper end of lever 72 to the left and that the position of this stop is adjustable by the operator outside the door who applies a screw driver to the notch 114 in head 112 on rod 110 and rotates it in the direction desired to vary the rela` tive positions `as may be needed of the block iai and the boit iso. n

In the operation of the device, the'entire interior of the exterior case 18-20-22 is substantially filled with checking liquid, usually oil. Assuming the parts are in the position of Fig. 1 and the operator presses against the outside of the door16 to open it. This, in the obvious manner, well known in the art, pulls rod 24 and cylinder 44 to the left, as viewed in Fig. 1 until the parts, after passing the position of Fig. 3 reach that of Fig. 2, in so doing compressing ' springs 38 and 40. During this movement, the oil or other checking liquid freely flows through passageway. 48, past ball 52 and through passageway 50 into the interior chamber 144 of cylinder 44, closed by the left hand end or head of cylinder 58 within whichV passageway 62, heretofore referred to, is located.

When, now, the operator releases the d-oor, and it begins to` close, either throughthe compressed springs 38 and 40, or through the-agency of an external spring forming no part of this invention or through pressure by the operator himself, this'closing pressure tends to force cylinder 44 back overcylinder 58, but this movement can only take place as rapidly as the liquid in space 144 in cylinder 44 can flow through passageway 62 and its right hand end controlled by point 80 of valve -rod 76. Whenfthe parts are in the position shown in Figs. l and `2,- lever 2 is in such a position that valve rod 7G is pressed by spring 84 as far as it will go to the left with the result that the discharge opening 62-80 is as small as it is desired to e made, and the door will, therefore, in this position yof the parts close as slowly as the operator of theI device intended it should close, except as the ultimate position of lever 72 is regulated by the turning of rod 110 and consequently bolt 130 in the manner heretofore described, to adjust the position of stop 138. In this position of the parts the door will close sl-owly under the action of the check for the reason that the spring 84 is of sufficient strength to, under normal conditions, force the point 80 of rod 76 as far as it will go toward the discharge opening of passageway 62. This spring 84 is, however, sufiiciently weak so that when an excessive pressure is applied to the door itself thereby creating an excessive pressure in chamber 144, this latter excessive pressure will be applied to the stream of liquid going out of passageway 62 with the result that valve rod 76 is forced to the right and the opening 62`80 is enlarged to its maximum.

Vhen member 98, heretofore referred to, reaches the position of Fig. 3, it, in engagement with cam 96, rotates lever 92 in a clockwise direction from that of Fig. 2 and correspondingly moves lever 72 with the result that head 78 on valve rod 76 is moved to the right. The movement of this rod under spring 84 to the left is correspondingly limited by the position of lever 72, and this lever, therefore, prevents point 8O of rod 76 entering the end of passage 62 as closely as is shown in Figs. 1 and 2l with the result f that the heretofore described normal opening of passage 62-80 is correspondingly temporarily increased. In practice, the cam 96 is so shaped and the member 98 is so located that this enlarged opening is maintained during the portion of the swing of the door when it is most desirable that it close rapidly.

It will be seen from the foregoing that by this device the normal discharge area of the passagewayl controlling the checking fluid is automatically varied in size as the door moves; that the valve is automatically relcasable when an excessive pressure is exerted upon the door, and that the valve is adjustable at all times from outside the device.

`bination of a casing,

of said second-named It will, of course, be understood by those skilled in the art vthat the checking liquid, after passing to the right through passageway 62 and past valve point 80, return via ports 66 and 68 to the main chamberl of the check.

By adjusting rod 1104so that valve 62-80 conipletely closes, the door may be secured by the check in any selected open position.

Having .thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a door check and closer, the coma fluid discharge port or passageway in said casing, a valve controlling the said port, means tending to move the valve toward said port, a pivotallymounted lever having an operative connection with said valve, and a second lever pivotally mounted in said casing one end of which is operatively engaged with the firstnamed lever while its other end is free.

2. In a door check and closer, the combination of a casing, a iuid discharge port or passageway in said casing, a valve controlling said port, means tending to move the valve toward said port, a pivotallymounted lever having an operative connec-- tion with said valve, a second lever pivotally mounted in said casing one end of which is operatively engaged with the firstnamedlever while its other end is free, a cam on the free arm of the second-named lever, and means having coperative engagement with said cam for operating said lever.

3. In a door check and closer, the combination of a casing, a fluid discharge port in said casing, a valve for said port, means tending to move the valve toward said port, a pivotally-mounted lever having operative connection with said valve,` a slot in one end of said lever, a second pivotally-mounted lever the short arm of which passes through said slot and has operating connection with the first-named lever, a cam on the long arm lever, and means havlng coperative engagement with said cam or operating said levers.

In a door check and closer, the combination of a casing, a fluid discharge port in said casing, a valve for said port, means tending to move said valve toward said port, a pivotally-mounted lever having operative connection with said valve, an abutment for one end of said lever for determining the movement of said lever, means extendingfrom said abutment through the casing an to the exterior of the casing whereby the abutment may be adjusted from the exterior of the casing, a lever pivotally mounted in the casing with 'its short arm having operative engagement with the first-named lever, a cam on the long arm of the secondnamed lever, and means cooperative with said cam to operate the rst-named lever.

5. In a door cheek and closer, the combination, with the fluid-controlling valve within a easing and a lever to control said valve, of an abutment to limit the movement 5 of said lever, said (butment comprising ascrew-threadedv block, an abutment screwthreaded in said block and adapted to be vengaged by said lever and when so enga ed is held against rotation, a rod non-rotatably i0 connected with said block and extending to the exterior of the Casing whereby it may be rotated and in turn rotate the block and Gopies o! this patentmay he obtained for ve cents thereby regulate the distanoersaid abutment projects from saidblock and thus regulate the extent of movementofsaid lever, said 15 adjustment being made exterior of the door in which the Check and closer is positioned. In witness whereof, I `have hereunto subT scribed my name in the presence of twol witnesses. a

RONALD E. J. NORDQUIST.

Vitnesses y DWIGHT B. CHEEVER, `M. S. RosENzwEIG.

each, by ddxeseing the Commissioner of Intenta,

Washington, D. G."

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