US1983353A - Revolving door - Google Patents

Description

Dec. 4, 1934. w. s. ELY ET AL REVOLVING DOOR Filed Nov. 17, 1953 3 Sheets-Sheet l INVENTORS H4 uE/2 S. EZY BY form/v0 PERE/V/ mm A'ITORN EY Dec. 4, 1934. r w. s. ELY ET AL 1,983,353

REVOLVING DOOR Filed Nov. 17, 1933 3 Sheets-Sheet 2 ATTORNEY D 1934- w. s. ELY ET AL ,9

REVOLVING DOOR Filed Nov. 17, 1955 E SheetS-Sheet 5 lumm INVENTORS l KVLTER 5. ELY

fa/w/vo PERI/W ATTQRNEY- Patented Dec. 4, 1934 UNITED STATES PATENT OFFICE REVOLVING DOOR tion of New York Application November 17, 1933, Serial No. 698,482

10 Claims.

This invention relates to revolving doors, and has for an object to provide an improved revolving door of the type in which the several leaves are normally retained in fixed radial positions with reference to a central column, but in which the leaves may yield and may be swung to a collapsed condition when subjected to abnormal pressure. 1

It is an object of the invention to provide door of this type in which the leaves are adequately and securely supported in their normal positions but without resort to the usual connecting chains between adjacent leaves.

It is a further object of the invention to provide means for limiting the speed at which the collapsing and restoring movements of the leaves are effected.

It is also an object of the invention to provide a door structure which is thoroughly sealed against the admission of drafts,

Other objects and advantages will hereinafter appear.

In the drawings forming part of this specification:

Figure 1 is a view in sectional elevation illustrating a door embodying features of the in- Vention;

Figure 2 is a horizontal, sectional view of the door of Figure 1 with a dotted line showing of the door leaves collapsed and moved to one side of the door opening;

Figure 3 is a perspective View of the door leaf assembly, the view being broken away intermediate its ends for compactness of illustration;

Figure 4 is a fragmentary, sectional view showing the door leaves in folded condition;

Figure 5 is a fragmentary view in elevation showing the structure of Figure 4 as viewed from the left of said figure;

Figure 6 is a fragmentary, sectional elevation taken on the line 6-6 of Figure 9. Attention is called to the fact that the section line is along two radii at right angles to one another, and that the leaves illustrated are adjacent and not opposite leaves;

Figure 7 is a fragmentary, vertical, sectional View of the lower portion of the door;

Figure 8 is a fragmentary, sectional, plan View illustrating particularly the speed control and detent mechanism;

Figure 9 is a fragmentary, horizontal, sectional view taken on the line 99 of Figure 6, looking in the direction of the arrows;

Figure 10 is a perspective view of one of the hubs for supporting the leaves;

Figure 11 is a, perspective View of a leaf hanger;

and

I Figure 12 is a diagrammatic view illustrating the contour of a portion of a speed control and leaf detaining cam disc.

The doorway comprises the usual arcuate guides 1 erected in a building structure, a floor 2 and a suitable top or ceiling wall 3. The door comprises a pair of opposed leaves 4 and a pair of opposed leaves .5 quadrangularly related to the leaves 4, all suspended from a vertical center shaft 6 which is .revolubly supported from a trolley '7. The trolley, in turn, is mounted upon a track 8 above the ceiling wall 3.

Hubs 9 are made fast to the shaft 6 near the upper and lower ends thereof. The hubs are duplicates of one another, but are quadrangularly re1ated,the arrangement being such that the upper hub supports the opposed leaves 4, while the lower hub supports the opposed leaves 5. Each hub includes a tubular portion 10 which fits the shaft 6 and which is fixedly secured to the shaft in any suitable manner. Each hub also includes pintle blocks 11 and 12 integral with. the tubular portion 10. The opposed blocks 11 are duplicates of one another and the opposed blocks 12 are duplicates of one another. Each of the blocks is provided witha bore 13 in which a pin 14 is supported upon a ball bearing 15. The ball bearing is, in turn, supported in the upper concave face of an adjustable screw '16 which is threaded upward into the pintle block from below. Each pintle pin includes a flange 17 which stands substantially flush with, but a little above, the top of the block in which it is mounted. The screw 16 may be adjusted to raise or lower the associated pintle pin to locate the flange 17 thereof in proper relation to the top of the pintle block to causethe weight of the associated leaf to be borne substantially by the flange.

Each pintle block also has fixed in it a bearing pin l8'which extends downward below the lower surface of the hub. Each pin 18 of the lower hub is in alignment with a pin 14 of the upper hub, and each pin 14 of the upper hub is in alignment with a pin 18 of the lower hub. The pins 14 of the upper hub form supports and alternative pivots for the leaves 4 about which said leaves may be folded in one direction or the other to collapsed condition, and the aligned pins 18 of the lower hub form coaxial bearings for assisting in maintaining the axis of rotation substantially parallel to the axis of the shaft 6. Similarly the pins 14 of the lower hub form supports and alternative pivots for the leaves 5 about which said leaves may be folded in one direction or the other to collapsed condition, and the aligned pins 18 of the upper hub form coaxial bearings for assisting in maintaining the axis of rotation substantally parallel to the axis of the shaft 6.

The supporting of the leaves on the pintle pin flanges 17 is desirable since it conduces to free swinging of the leaves and avoids the tendency of the leaves to pull away from the pivots which is found to be present when the leaf is allowed to run in frictional engagement with the tops of the pintle blocks.

Each of the leaves 4 includes a hanger 19 which is set into the leaf near the upper end thereof, and which includes two bearings 20. The bearings of each leaf rest upon two of the pin flanges 17 of the upper hub, and partially embrace the pins, the bearings being open at their inner ends to permit them to separate freely from the asso-.

ciated pins. These same leaves 4 have similar but inverted hangers at the lower ends for cooperating in a similar manner with the lower pins 18 of the lower hub, the only difference being that the active pin 14 turns freely with the door leaf, whereas the lower inactive pin 18 is stationary and acts merely as a bearing for the door leaf. Each hub is surrounded by upper and lower filler sleeves 21 and 22 for filling spaces which would otherwise be open between the hub and the associated hanger, and each hanger includes a tongue 23, the inner end of which normally lies within a slot of the filler sleeve to assure an effective seal against drafts.

Provision is made at the upper and lower end of each leaf of means for holding the leaf bearings yieldingly but firmly against the two associated pins of the hub. To this end a latch 24 which is desirably formed of wear resisting steel and which constitutes a force multiplying element is pivotally mounted upon a pivot pin 25 carried by the hub. The latch partially embraces a roller 26 which is pivotally mounted in the associated hanger A swivel link 27 is pivotally mounted upon an upwardly extending bearing pin 28 carried by the latch, and the swivel link is, in turn, connected through a horizontal pivot 29 with the end link of a chain 30. The opposite end of the chain 30 is provided with a socket block 31 into which a rod 32 is threaded.

The rod 32 extends through an ear 33 of a bracket 34 which is adjustably secured to the hanger. A coil spring 35 surrounds the portion of the rod 32 which extends outward beyond the ear 33 and is held under compression by means of a cap 36 fixed on the outer end of the rod.

The bracket 34 is mounted on the hanger by means of an car 37 which surrounds and snugly fits a supporting sleeve 38. A headed screw 39 extends through the ear 3'7 and the sleeve 38, and is threaded into the hanger. The head of the screw bears against the outer face of the ear 3'7 and limits approach of the bracket 34 toward the shaft 6.

The mechanism 23-38 at the top of a leaf 4 is duplicated in inverted form at the bottom of said leaf. These mechanisms normally maintain the leaf firmly in a radial position, but when excessive pressure is applied either deliberately by an operator, or by persons rushing at the door in a panic, the leaf swings about the common axis of one pair of aligned pins 14, 18. The roller 26, moving with the door hanger, cams the latch 24 upward and causes the top of the latch to assume a substantially horizontal position flush with, or a little above, the tops of the adjacent pintle blocks 11. As the leaf is swung toward a collapsed position the swivel link is turned and caused to ride upon the upper face of an adjacent pintle block. The latch 24 is thus retained in an elevated position free to be cleared by the returning roller when the door leaf is returned to normal position. The lugs 40 are provided on the blocks 11 and 12 for the purpose of extending the supporting surfaces on which the swivel link may ride.

As soon as the cam face of the latch 24 clears the roller 26 the resistance of the leaf tofolding movement is greatly reduced and the leaf may be easily folded to a completely collapsed position.

As has been stated, the hanger mechanism is duplicated in inverted form at the lower end of each leaf 4. In the case of this inverted mechanism the swivel link is normally held upward by the spring and is depressed-when the leaf is moved toward collapsed position. The lugs 41 cooperate with the depressed swivel link in the same manner that the lugs 40 cooperate with the elevated swivel link.

. Each of the leaves 4 may be referred to as an upper hung leaf, since it derives its support from the upper hub, while each of the leaves 5 may be referred to as a lower hung leaf, since it derives its support from the lower hub. In each lower hung leaf the hanger structure at the upper end of the leaf is the same as the hanger structure at the lower end of an upper hung leaf, namely, it isinverted with relation to the hanger structure at the upper end of an upper hung leaf, while the hanger structure at the lower end of a lower hung leaf is a duplicate of the hanger structure at the upper end of an upper hung leaf.

Above the upper hangers and just beneath the ceiling wall 3 provision is made of means for limiting the speed at which the leaves maybe moved to and from collapsed condition and for determining the collapsed positions of the leaves. For this purpose provision is made of a lower cam disc 42 and an upper cam disc 43, the discs being fixed to one another and the latter disc being keyed to the shaft 6. Bearing blocks 44 and 45 are secured to the hangers of the leaves 4 and 5, respectively, and cooperate, respectively, with the discs 43 and 42 for producing friction and for determining the collapsed positions of the leaves. As seen in Figures 6 and 8, the bearing block 44 normally rests in angular depressions of both discs. The same thing is true of the bearing block 45. When an upper hung leaf 4 is swung from normal position to the dotted outline position indicated by 40!. in Figure 8, the swinging movement is substantially about the center of a pin 14 of the upper hub. The curved surface 46 of the lower disc approaches this center, and hence the bearing block 44 leaves engagement with the disc surface 46 and no obstruction is offered. The curved surface 47 of the upper disc, however, is generally concentric with the axis of the pin referred to, but is bluntly serrated so that the spring 35 of the leaf which is being swung is put under slightly increased stress intermittently during this swinging movement. Beyond the surface 4'7 the disc 43 is provided with a shallow notch 48 into which the bearing block is drawn. The disc thus serves as a detent for yield ingly retaining the leaf 4 in the position marked 4a in Figure 8. When it is desired to swing the leaf beyond the position marked 40., it may be forced beyond the shallow notch and onto the surface 49 which is of the same contour as the surface 47. The leaf in this case finally enters a notch '50 of the upper disc beyond which it cannot be moved. As seen in Figure 8, the upper right hand quarter of the upper disc is a duplicate (or rather a mirror image) of the lower right hand quarter, and the left half of the disc is a duplicate (or rather-a mirror image) of the right half. The'lower disc 42 is of the same contour as the upper disc 43 and cooperates with the lower hung leaves 5 in the manner in which the upper disc cooperates with the upper hung leaves 4. In Figure 8 upper and lower hung leaves are shown swung through forty-five degrees each to the positions 4a and 5a, respectively, and the other upper and lower hung leaves are shown swung through one hundred and thirty-five degrees to the positions 4b and 5b, respectively. The normal engagement of the bearing blocks 44 with the lower disc, and of the bearing blocks 45 with the upper disc, serves to seal the structure against drafts.

Above the upper disc 43 provision is made of a smaller disc 51 for sealing the space between said disc 43 and the ceiling wall 3. The disc 51 has screws 52 threaded into it. These screws pass freely through the upper disc 43 and have their heads freely received in openings 53 formed in the lower disc 42. The heads of the screws are located below the upper disc 43 and are adapted to bear against the lower face thereof. Coil springs 54 surround the shanks of the screws 52 and urge the sealing disc 51 upward. The disc 51 has a marginal flange which fits within a flange of the disc 43. The disc 51 is capable of telescoping snugly into the disc 43 and is held projected against the ceiling wall 3 by the springs 54. The telescoping of the disc 51 into the disc 43 enables the central shaft to be tilted when required in conjunction with the movement of the shaft and the folded leaves to one side of the door opening.

Weather stripping 55 afiixed to the upper edges of the leaves extends inward to the periphery of the disc 51. Weather stripping 56 may also be provided between the inner edges of the leaves and the shaft 6.

While we have illustrated and described in detail certain preferred forms of our invention, it is to be understood that changes may be made therein and the invention embodied in other structures. We do not, therefore, desire to limit ourselves to the specific construction illustrated, but intend to cover our invention broadly in whatever form its principle may be utilized.

We claim:

1. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support and arranged in diametrically opposed pairs, and upper and lower leaf hubs fixed on the central support, one of the hubs being provided at the upper side thereof with a pair of upwardly extending supporting pivot members for each leaf of one pair of opposed leaves and the other being provided at the upper side thereof with a pair of upwardly extending supporting pivot members for each leaf of the other pair of opposed leaves.

2. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support and arranged in diametrically opposed pairs, and upper and lower leaf hubs fixed on the central support, each hub including four upwardly extending quadrangularly related pintle pins and four downwardly extending quadrangularly related pintle pins, the downwardly extending pins of one hub being in alignment with the upwardly extending pins of the other hub, each leaf of one opposed pair having bearing against two upwardly extending pins at one side of the upper hub and the aligned downwardly extending pins of the lower hub and adapted to fold about the common axis of either pair of'aligned pins, and each leaf of the other opposed pair having bearing against two upwardly extending pins at one side of the lower hub and the aligned downwardly extending pins of the upper hub and adapted to fold about the common axis of either pair of aligned pins.

3. In a revolving door, in combination, a rotary central support; leaves, foldably mounted on the support and arranged in diametrically opposed pairs, and upper and lower leaf hubs fixed on the central support, the weight of one pair of opposed leaves being sustained entirely by the upper hub and the Weight of the other pair being sustained entirely by the lower hub.

4. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support and arranged in diametrically opposed pairs, and upper and lower leaf hubs fixed on the central support, each hub including upwardly and downwardly extending bearing members, one pair of opposed leaves being arranged to coact with the upwardly extending bearing members of one hub and the downwardly extending bearing members of the second hub, and the other pair of opposed leaves being arranged to coact with the upwardly extending bearing members of the second hub and with the downwardly extending bearing members of the first hub.

5. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support and arranged in diametrically opposed pairs, and upper and lower leaf hubs fixed on the central support, bearings on the upper hub comprising in each instance bearings utilizing more than a quadrant of the top of the hub for each leaf and bearings on the lower hub comprising in each instance bearings utilizing more than a quadrant of the top of the lower hub for each leaf, one pair of opposed leaves being supported at the upper side of the upper hub and the other pair of opposed leaves bing supported at the upper side of the lower hub.

6. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support and means normally retaining the leaves in radial positions, comprising in each instance cooperative latching members on the leaf and the central support, including a vertically displaceable, horizontally pivoted, cam latch and spring means acting substantially horizontally upon said cam latch for opposing disengagement of said latching members.

'7. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support and means normally retaining the leaves in radial positions, comprising in each instance a force multiplying latch on the central support, a member on the leaf adapted to be partially embraced by the latch, a spring carried by the leaf and flexible tension means connecting the spring in radial positions, comprising in each instance a force multiplying latch on the central support, a member on the leaf adapted to be partially em- ,braced by the latch, a spring carried by the leaf and flexible tension means connecting the spring to the latch, comprising a chain having an end link connected to the latch through a pivot extending transversely of the latch pivot, said end link being adapted to ride against the associated hub in the folding and return movements of the leaf and to maintain the displaced latch clear of the latch engaging member on the leaf during the return movement.

9. In a revolving door, in combination, a rotary central support, leaves foldably mounted on the support, and means for controlling the speed of the leaves in their folding and return movements, comprising in each instance a bearing member fixed on the leaf and a fixed member on the central support cooperating therewith and having a serrated peripheral surface whereby the resistvance to leaf movement is intermittently in-

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