USRE14255E - Collapsible revolving door - Google Patents

Description

' T. VAN KANNEL.

I 'COLLAPSBLE HEVOLVING DOOR.

APPLICATION man Dsc 29. 191s RGISSUGd F61). 6, 1917.

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YCOLLAPSIBLE REVOLVING DOOR.-

' APPLICATION FILED 05m29.191s'.

` Reissued Feb.6, 1917. 14,255.

5 SHEETS-SHEET 2.

AVC" heg T. VAN' KANNEL.

COLLAPSIBLE REVOLVING DOOR.

APeLlcATlQN ELLED nEc.29, 191e.

Reissued Feb. 6, 1917.

5 .SHEETS-SHEET 3.

NG DOOR.

T. lVAN KANN COLLAPSIBLE REVOLVI APPLICATION .FILED DEC Reissued Feb. 6, 1917.

T. VAN KANNEL.

COLLAPSIBLE REVOLVING DOOR.

Reissued Feb. 6, 1917.

UNITED sTATEs PATENT oEEIcE.

THEOPHILUS VAN KANNEL, OF YARDVILLE, ANEVI JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 VAN KANNEL REVOLVING DOOR COMPANY, .A CORPORATION OF NEWT JERSEY.

COLLAPSIBLE REVOLVING DOOR.

Specification of Reissued Letters Patent. Reissued Feb, 6, 1917,

Original No. 836,843, dated November 27, 1906, Serial No. 284,980, filed October 30, 1905. Application for reissue led December 29, 1916. Serial No. 139,713.

To all whom it may concern:

Be it known that I, THEorIIiLUs VAN KANNEL, a citizen of the United States, residing in Yardville, countyI of Mercer, and State of New Jersey, have invented certain new and useful Improvements in Collapsible Revolvin Doors, fullyV described and represented 1n the following specification.

The present invention relates to 'improve- '656,062, granted to me on August 14C, 1900,

for revolving doors, and the present invention, as also did the invention disclosed in the patent just referred to, contemplates the provision of a door whose wings are so mounted upon the central standard, post or pintle, that they may be collapsed or folded in the direction of the exit by pressure greater than that necessary to 'revolve the door in ordinary operation, so that' in case of emergencies, such as the occurrence of a panic within the building, the doors may be collapsed automatically; that is to say, Without conscious manipulation on the part of the panic-stricken crowd, and permitted to swing to one side of the spindle, leaving open passages at opposite sides of the same, for rapid ingress or egress.

Revolving doors of such construction are thus suitable for use at the entrance of theaters, assembly halls, retail stores, oflice buildings, etc., where it .isdesirable to exclude the wind and dust, but where, in case of panic, it is equally important to furnish free egress for the public.

Any rush of persons against the revolving doors, operates in the present invention, to

collapse the doors automatically, whatever point or whatever compartment'of the doors be pressed upon, as, as has been indicated above, the construction operateswithoutany skill or knowledge on the part of such-persons, tok detach the ties, employed -for hold'- ing the door Wings in their normalor radial position.

construction of the patentl of 1900, above rei ferred to, but inthe case of the former patent, each wing had to be separately engaged by the onrushing crowd, or the excessive pressure, in order to unlock them individually from their fastenings in order tofpermit the wings-to fold, and consequently in readjusting, or restablishing the Wings in normal radial relation to the central spindle, after they had been once folded or collapsed, each Wing had to be individually adjusted. Now in the present instance, the wings are held in'normal radial operative position by iexible ties or cords, with one end of a tie permanently attached to the face .of me wing, andthe pposite end of the tie being held by an a tomatically operable fixture, designed to grip and hold the tie or cord under normal conditions, but to permit its end to be released upon the application of excessive pressure, to allow the wings to be folded, there being, it will be understood, a tie of this character between the adjacent sides of all-of the Wings, or, in a four Wing door, four. ties.

this arrangement, many advantages ing, or in any way, preventing the wings?.

from folding; third, the restablishing of it is only necessary to establish the normal Aposition of the two wings, between which a the wings to normal position is rendered very easy and convenient, in that, obviously,

`tie has been broken, when the movement will Y i' pull allY of the rest of the wings to radial i;elation with regard to the central spindle.

The adjacent faces of the wings are shown herein, connected by flexible ties formed of -.Wire rope, and: are Ymade adjustable as to length to set the wings at an equal distance from one another. One end of each tie is held to the wing detachably, as above indicated. and the asteningdevice for such end is'hinged upon the wing. so that it may be" moved outwardly ever detached.

' The. wings in the present invention are pivoted upon the cent-ral spindle in a novel maimer by providing a grooved disk near each end of the spindle and furnishing each wing with two fulcrum-pins adapted each to engage the groove in one of the disks. A pinion is provided upon the spindleadjacent to each disk. and a toothed segment meshing with such pinion is attached to each of the to rengage the tie whenwings and made concentric withthe ful` crum pin, and the fulcrum pins ai'e thus enabled to change their position upon the fulcruiii-plate when the wings are moved from their normal position by their constant engagement with the groove in the disk during the rolling of the segment upon the teeth of the pinion.l i

The pinsA upon which the wings are supported are termed' fulcrum-pins herein, as the doors are supported upon Athem and turn upon them during the swinging movement' of the wings when collapsed. The boxes 'by which the pins are -iixed upon the doors are termed fulcrum-boxes." and the disks which support the pins upon the spindle are termed fulcrum-disks. I

' The 'various details of construction will be vunderstood bv reference to the annexed drawings. in which- Figure 1 is an'elevation ofthe. spindley with the doors in their workilig position,

Fig. :2 is a view showing the upper partof one door with the notch to receive the fulcruin-box, l

Fig. 3 is a plan ofthe same-parts with the door-casing partly represented.

Fig. 4 is acro-section of the tie-fastening device ladjacent to thepin (invFig. 9.

showing one side of the `voke 5.V

Fig. is a cross-section of the same on line 5 5 in Fig. 9.

Fig. 6 is a cross-section of the same on line 6 6 in Fig. 9.

Fig. 6 shows the cord tie.

ig. T` is a perspective view of the tiefastening device with the.v cover opened to insert and engage the cord. v i

Fig. S is an outside view of such fastening device. and v- Fig 9 is av sideelevation of the. same with the side plate removed on line- S-S in Fig. 8 and the inner part broken awav to expose the aperture through which the tie is inserted. "y

Fig. 10 is a view of the pivotal connectionsv between the door and the spindle in section throu li the center of thespindle. Fig. 11 is a p an of the,v fulcrum-disk with the doors fulcruni-box within the 'collapsed at one side of the same and the part of the saine.

Fig. 13 is af view showing the inner edge of the fulcrum-box and the toothed face of the segment.

Fig. 11 shows a a ulcrum-box with a segment in the, upper part of the same, and

view similar to Fig. 13 of Fig. 15 is a Vcross-section on line 14.*11 in Fig. 12.

Fig. 16 is a and wings.

In Figs. 1 and 3. (L designates the spindle, and I) the wings, heid inovably adjacent to the spindle. each by a fulcruin-pin c engaging the'groove (I in the disk e. The wings arenotched. as shown in Fig. Q, to receive fulcrum-boxes p, which embrace the disks, and a toothed segment f is secured within each notch to mesh with the pinion g upon theispindle. adjacent to the disk. The engagement of the fulcrum-pin with the groove d supports the pin so as to be capable of movement concentric with the spindle perspective view of the spindle when the doors are detached from one another'. and the pin thus operates as a fulcrum dui-lng the turning of the wing to hold the toothed segment concentric with the pinion,A

versa. Fig. 3 shows the wings disposed at regular intervals of ninety 'degrees around vthe spindle and the center of each toothed segment 4engaging the pinion.

Ties r (represented herein ofwire rope) 'are shown in Figs. 1 and 2 connecting the adjacent faces of the wings, and while thus held the wings and spindleare adapted to turn together in thenormal operation of the revolving door within its casing z'. (Shown in Fig. 3.)

`The detachment ofany of the ties fromA any of the. wings permits the wings toswing looselyr upon their fulcrum-pins c, theirA movement causing the segments to turn them all to one side of the spindle, as shown in F ig-.,11. In such movement the segments upon the adjacent wings `would interfere with one another unless attached to 'the' 'wings on different levels, and this arrangement is secured by forming .each ofthe wings with the notch j (shown in Fig. 2) where it embraces the disk and securing ya notch by means of anges k.

The fulcrum-box 'p is provided with a. socket in which the fulcrim-pin c may/move longitudinally and be pressed by a spring l toward the bottom of the groove in the disk v The bottom of the groove d' in the disk is provided, as shown in Fig. 11, with four equi-distant conical recesses m, and the point of the fulcrum-pin c is made conical to fit such recesses, Whichassists in disposing the wings in their normal position at equal distance from one another around the spindle. The recesses m operate only `as guides to the feelings of the operator in setting the wings in theirv normal position, as the tapering form of the recesses and pins permits the fulcrum-pins to serve as springecatches, which push voluntarily out of the recesses when pressure upon the wings causes them to collapse. A central partition n is formed in each fulcrum-box to prevent the passagev of air or drafts through the same, and the toothed segments for the adjacent wings are attached to seats upon such partitions at diHerent levels, so as to clear one another when the wings are collapsed, as shown in Fig. 1l.

The teeth of the segments can be cut before they are attached to the seats n. The parts are so proportioned that the extremity of each segment mzlproject into the ful- Crum-box upon the adjoining door nearly to `the partition n, but without interference from the partition or the segment attached thereto at a different level. Dotted lines in- Fig. 11 indicate the normal position of the four wings, and as such lines are at opposite angles of forty-five degrees to the plane of the collapsible wings it will be observed that the two wings at the outer sides of the group are required to turn' through an are of one hundred and thirty-live degrees to reach their normal positions, while the two central wings of the group need to turn only forty-five degrees. The pinion g is shown with sixteen teeth and each of the segments f with eight teeth which enables any of the wings to move onehundred and thirty-five' degrees without rolling upon more than four teeth of the pinion, and this brings the end of each segment into engage- *ment with the pinion, when the wings are collapsed, as s own upon the two outer doors of the group in Fig. 11. To prevent the segment from rolling farther and breaking the connection of th'e segment with the pinion, the stops o are provided upon the fulcrum-box adjacent to the fulcrumpin, (see Figs. 11 and 12), and opposed stops g are provided upon the edge of the disk to engage the stops o when the wing moves -to such desired limit. In such movement the stop upon 'the fulcrum-box clears the `first two of the stops g upon the disk, but afterward sweeps inwardly against the edge of the disk and encounters the third stop g .after-the wing has moved t'wo hundred and and thirty-live degrees from one stop g to reach its normal position, in which the fulcrum-pin c' engages the recesses m upnn the line and could be moved one hundred and thirty-five degrees farther before the stop on the fulcrum-box would encounter the other stop g upon the disk.

If the wing be pushed when the stops are in contact, it operates to rotate the disk and the spindle, and to bring such wing into the proper relation with the other wings to set the wings parallel with one another in their collapsed position, as shown in Fig. 11, and continued pressure upon any of the wings produces this result.

The segments and the stops are so propor-A tioned, as shown in Fig. 11, that any of the wings, when a tie between the wingsis de 'tached can be pushed ineither direction and operate by continuous pressure to collapse all of the wings and bring them parallel to one another.

The fulcrum-pins near opposite ends of the wings in engagement with grooves in disks at the opposite ends of the spindle form a very inexpensive and etfective joint for the wings, in which the pins can move upon the fulcrum-disks for folding all of the wings together upon one side of the spindle. The fulcrum-boxes are shown with clearance-space inside of the sameabove or below each of the segments for the adjacent segment to penetrate the box without inter- L,

ference, and it is obvious that the four segments operating upon the pinion at each end of the spindle may be made to roll in four different planes by making the pinion twice as long; but the construction shown is more economical of s ace and material. To connect the doors etachably, it is necessary to have a tie which is held at one end inan adjustedgripper, which retains the tie with suflicient force to rotate the doors under normal pressure, but releases the tie when abnormal pressure is brought upon the wings, so as to let them collapse. It is also desirable that the tie should be capable of adjustment as to length so that when the ties are first applied to the wings the wings devised the tie shown in Fig. 6, which con-v sists of a piece of wire rope 1', having a screw-threaded sleeve s soldered upon one end and a knob t soldered upon the opposite end. The fixture applied to the wmgs for holding the opposite endsof such t1e 1s also shown in Figs. 7, 8 and 9 and consists of the gripper-box u, having apertures 1 and 2 upon opposite sides to admit "the ends s and t of" the tie, and having a screw-threaded socket 3 for engaging the threaded sleeve s and an abutment 4 and spring-gripper for detachably holding the knob t. The sleeve 's forms a screw-threaded shank upon the tie,

n which can beureadily turned inthe socket when the clamp-screws ofthe socket are loosened, and the length of the tie can thus be varied to set the wings in their operative `positions. When the tie is thus suitably adjusted, it is held in its adjusted vlengtlrby tightening the screws 15 to clamp the shank.

The box is fitted to --the door-wing so that the apertures 1 and 2 are exposed upon the f opposite sides of the wing, as shown in Fig. 3, and when the ends of the tie are properly secured in the clamp 3 and the spring-gripper the wings are held in' an operative condition, To release the tie when subjected to abnormal pressure, the abutment 4 is formed of a roller and the spring-gripper is formed with a swing-yoke 5,

. one of the wings in Fig.`2,) to readily insert Y the knob between the rolls 4 and 7; To hold the cover normally locked, a spring-dog 16 is pivoted upon one end of the cover to engage a shoulder 17 within one end of the gripper-box, and a thumb-piece 18 is projected from the do `through a slot 19 in the cover to rock the og when it is desired to disengage it from the shoulder to permit the cover to be opened. The dog is sloping upon the inner side, so as to be. pushed automatically out of the way, as the cover is closed, and its form locks it upon the abutment, so that the pull exerted upon the cover by the tie (which is held in the gripper) is firmly resisted. A shoulder upon the plunger 8 holds the roll 7 normally at a suitable distance from the roll 4 to admit the tie 1' be.

tween the rolls, and the side plate which carries the roll 4 is formed with notch 11 adj acent to the aperture 2, so that the knob can be readilyv passed through such notch to locate it beyond the rolls and insert the tie 'r between the rolls without separating, the

saine, which would be diicult in view of the4 resistance of the spring 9. The casing or box which holds these parts forms al fixture containing the fastening-device for the'f'ends"` Vthe gripperox u, as shown in vFi 7 which not only renders the interior of t egripper accessible, but brings it nearer to the. adjacent door-wing, so as to a'ordsome slack inl the tie for manipulating the knob upon the end.

-v The fastening device may be inserted in the slot formed through thedoor-wing, as at the left side of Fig. 1, or it may be formed as a cross-bar extended 'between the stiles, as at the right side of Fig. 1, the former arrangement being suitable when a wooden panel is employed in the bottom of the wing and the latter arrangement when the whole p wing is filled with glass To expose the apertures l and 2 at opposite sides of the wing in the latter-case, the cross-bar w is set centrally `upon the stiles y and formed `withgrooves in its upper `and lower edges to receive the glass plates e. Where the gripper-box is set in' the rail 12, aspat the left side of Fig. 1, a hand-rail 13 is'extended bel tween'the stiles in the usual manner; but the use of such a hand-rail may be avoided when the gripper is' formed in the cross-bar 'w by vconstructing a hand-rail v13 upon the cross-bar, 'as shown in Figs. 1, 7 and 8. Such construction enables the cross-bar to perform the double function of carrying the fixture to grasp the ends of the ties detach,

ably,an`d also to furnish a support for the hand in pressing upon the door, and thus obviate the necesslty of a special hand-rail.

From the above description it will be understood that the ties between the wings 7 `hold the doors firmly in their operative relations until detached and that the ties are not yielding in themselves, but that the fastening for one or both of the ties is of a yielding character, so as to form a detachable engagement with the tie which will release when exposed to abnormal pressure, thus making the collapsing of the wings en'- tirely automatic in emergencies and requiring no especial skill or attention on the part of the passenger to clear the passage-way.

Having thus set forth the nature of the invention, what is claimed herein is: 1. .In a revolving door, a central spindle, a series of wings pivoted thereto, and having iiexible ties connecting the adjacent sides of the wings, said wings provided with automatically detachable fastenings, adjusted to permit the automatic 'detaching of the Wings under abnormal pressure, whereby upon the appllcation of excessive pressure -to s'ome ofthe wings, the tie connection therebetween is broken, and the other wings folded, without releasing the `ties therebe- 26 lposition upon the spin le, and ad-l l 'justed to release the wings when subjected to abnormal pressure, the tie connection beftween the wings subjected to abnormal pressure breaking and the wings folding without disturbing the tie connections between the other wings.

3. A, revolving door having a suitable casing, a spindle centered therein with hanger plates near its opposite ends, -said plates having guide grooves therein,- a series of wings adapted to be moved to side by side position to make emergency exits and having fulcrum whereby a series of wings may be collapsed to folded position from any direction.

4. A revolving door having a suitable casing, a spindle centered therein and provided with toothed pinions, and aseries of wings having fulcrum-pins movably supported upon a spindle and provided each with a toothed segment engaging such pinion` to cause its pins to move so as to bring the wing tangential to the spindle when the wing is moved relatively to the spindle. f

5. A revolving door having a suitable casing, a spindle centered therein with fulcrum disks and pinions near its opposite ends, and

a Series of wings having fulcrum-pis movable upon said fulcrum-disks and provided each at opposite ends with a toothed segment engaging a pinion, to cause the pins of each wing to move so as to bring the wing tangential to the spindle when the wing is' moved relatively to' the spindle.

6. A revolving 'door having a suitable casing, a. s indle centered therein with fulcrum-dis s and pinions near its opposite l ends, and a series of wings having fulcrumpins movable upon the fulcrum-disks Aand provided each at opposite ends with a toothed se ment engaging a pinion, to cause the pins o each wing to move so as to bring the wing tangential to thefspindle when the wing is moved relatively to the spindle, the segments upon the several wings being arranged to operate at different levels upon the said pinions soas to clear one another when collapsed at one side of the spindle.

7. A revolving door having a suitable casing, a spindle centered therein and provided with toothed pinion, and a series of wings having fulcrum-pins so as to be capable of movement concentric with the spindle and provided each with a toothed segment engaging such pinion, the teeth in suchsegment proportloned to engagea semicirci1`mference of the pinion, wherebyA anyof the 'wings may be rolled one hundred and fty.

five degrees from its normal position.

8. A revolvmg door having a suitable casing, a spindle centered therein with fulcrum disks andA pinions near its opposite ends, a serles of wings having fulcrum-pins supported so as to be capable of movement concentric with the spindle, and thewings proins floating in said grooves- .vided each at opposite ends with toothed segments engaging such pinions, and stops to limit the rolling of the segments upon the pinions.

' 9. A revolving door having a suitable casing, a spindle centered therein with fulcrum series of wings having fulcrum-pinssupported so as to be capable of movement eoncentric with the spindle and the'wings pro vided at opposite ends with toothed segments engaging such pinions, stops to limit the rolling of the segments `upon the pinions, and spring-catches for engaging the recesses-near its opposite ends to fit over' the disks and pinions, and fulcrum-boxes fitted to the recesses and provided each with a. fulcrum-pin movable upon' the disk and with a toothed segment 'engaging the pinion, the toothed segments in the several boxes being arranged to engage the pinions at different levels, whereby the segments clear one another when the wings are folded lto one side of the spindle.

' 11. A revolving door having a suitable disks and pinions near its opposite ends, a

casing, a spindle centered therein` with fulcrum disks and pinions near its opposite ends, and a series of wings having each recesses near its opposite ends to fit over the disks and pinions, and fulcrum-boxes fitted to the recesses and provided each with a fulcrum-pin movable upon the disk and with a toothed ksegment engaging the pinion, the boxes having partitions n, with seats provided at different levels upon the several wings'with the toothed segments attached to A such seats, lwhereby the teeth may be cut in the segments before they are attached to the boxes.

12. A revolving door having a su1table casing, a spindle centered therein with ful-` crum disks and pinions near its opposite ends, the opposed faces of the disks having each a groove near its periphery, a series of wings having each a fulcrum-pin fitted to the said groove, and a toothed segment concentric with such pln and engaging the pinion, whereby the wings may be collapsed by the rolling of the segments upon the pinions and the shifting of theVfulcrum-pins in the grooves.

13. In a revolving door having collapsible wings, the combination with a flexible tie4 fastened upon one Wing, of a fastening device upon the adjacent wing, arranged and operated to grasp the end'of such tie detachably and to resist the normal pressure upon hevwings and adjusted to release the tie under abnormal pressure, the flexibility. of

the tie being'sucli that upon the breaking of the connect-ion between the adjacent sides of two wings, the wings will be permitted Y to be automatically folded without disturbing the other ties. 14. In a revolving door having collapsible wings, the combination with' a fiexible tie fastened upon one wing andv having a knobv upon the end, 0f a fastening device upon the adjacent wing, comprising an abutment for one side of the knob and a spring gripper others, whereby the restablishment of any' one ofthe broken connections will reestabliSli thewings in normal operative position.

15. In a revolvingdoor having collapsible wings; the combination, with each Wing, of a fixture attached to the wing and having apertures upon opposite sides, a clamp within each fixture adjacent to one of the apertures for gripping one end of the cord, and

' a fastening device within the fixture adjacent to the other aperture having a springgripper to. grasp the end of an adjacent cord detachably, whereby all of the wings are detacliably connected, andl the wings may be automatically collapsed when abnormal pressure is applied to any oneof them.

16. In a revolving door having collapsible wings,"the combination, with each wing, of a fixture attached tothe wing and having apertures upon opposite,sides,a clamp within each fixture adjacent to one of the apertures for gripping one end lof the cord, and

a fastening device within the fixture adjacent tothe other aperturey comprising an abutment provided with a roller and an adjacent spring-gripper provided with a roller,d and cords connecting the several fixtures and secured each at one end in the fixture-clamp, and provided at the other end v17. In a revolving door, a .wing-fixture with a knob to engage the rollers in one of the fixtures.

'combinedwith a cordto retain the wings detachably in an operative position, the fixture consisting of the box u attached to the wing with aperture in the bottom and clamp adjacent tothe aperture for holding the end lofl the cord, ac.over hinged yupon tliebox and having an aperture for' the insertion of a cord with knob upon the endan abutment v ,[66 upon the cover havinga'roller adjacent to such aperture and a spring-gripper rovided with a foller, with space at the gids of the-rollers to pass the knobbeyond the' same, and a latch to hold thel cover normally f closed upon'the box.

y18. In a revolving'door, a tie formed of a wire rope r1 provided with screw-threaded shank s upon one end and a knob t upon justed and itfinay be automatically released when subjected to abnormal pressure.

19. In a revolving door, a tie formed of a wire rope r provided with screw-threaded shank s upon one end and knob t upon -tlie opposite end, and fixtures upon the Wings provided each with the threaded clampsocket 3 to engage the screw-thread a adjustably, and a spring-gripper to engage the knob tedetachably, as and for the purp ose set forth.

20. In arevolving door, the combination with hinged door-wings, of ties extended between the adjacent faces of the wings, and fixtures upon the wings provided each with a. clamp for one end of the tie, and a springgripper to engage the opposite end of a tie detacliably,y such spring-gripper being hinged upon the said fixture to facilitate the engagement of the tie with the spring-grip per. l

21. In a revolving door, the combination, with the wings furnished with glass panels and connected by ties between their adjacent faces, of the cross-bar w provided with grooves 4upon its upper and lower edges for the glass, the hand-rail 14 for pushing the wing, and containing a fixture for clamping one end of atie and for holding the opposite end of a tie detachably, whereby the wings may be collapsed lunder abnormal pressure. v

" 22.A In a revolving' door, a central spindle, series of wings pivoted thereto, and flexible ties connecting the adjacent sides 'of the der abnormal pressure, the ends of said flexiv ble ties being connected with the wings at points intermediatey the top and bottom 'wings automatically-detachable to permit l the automatic collapsing of the wings un,

thereof, approximate tothe points of application of the pressure upon the Wings, said' flexible ties being'adapted to hold the wings normally in radial position upon the spindle and adapted to automatically release the wings upon application of excessive pressure to some of the wings sufficient to break the tie connection therebetween, without disturbing the tie connections of the otherwin 23. A revo ving door having a suitable casing, a spindle centered therein with hanger plates near its opposite ends, said plates having guide grooves therein, a series of wings adapted to be moved to side by side position to make emergency exits and having fulcrum pins Heating in said grooves whereby a series of wings may be collapsed to folded position from any direction, said wings being provided with automatically-detachable astenings adjusted to permit the automatic collapsing of the wings upon the application of excessive pressure applied to the wings.

24. A revolving door having a suitable a spindle centered therein with hanger plates near its opposite ends, said plates having guide grooves therein, a series of wings adapted to be moved to side by side position, to make exits on the sides of the central standard, and having fulcrum 15 pins floating in said grooves, whereby a serieso wings may b collapsed to folded position from any direction, and iexible ties between the adjacent sides-of the wings and serving to hold the wings in normal radial relation to each other, and permitting all 20 of the wings be folded upon the release of one of the ties.

In testimony whereof, I have hereunto setmy hand and seal, in the presence of two subscribing witnesses.

'mEonnLUs VAN miami.. as]

Witnesses:

MELVIN Y. PALLESER, FREDERICK FmN.

Images