US 1417377 A
Description (OCR text may contain errors)
MANHOLE FRAME AND COVER.
APPLlcATloN man JUNE 7.1920.
1,417,377. Patented May 2351922.
repeats LEON GSCHWND, F YOUNGS'EOVJN, OHM), ASSIGNOR TO MORRIS BONNEVIE, 0F
` CHICAGO, ILLINOIS.
MANHOLE FRAME AND COVER.
ygpgffgy? Speciicaton of Letters atent. Pateulgd Rigby 239 1922.
Application filed June 7', 1920. Serial No. 387,267.
`provide a device of the type described in which means is provided for locking the cover in position, means also being provided `to permit the unlocking` ot the cover-.at will.
'further object of my invention is to provide a `device of the type described that ,is thoroughly practical commercially.
Other objects and advantages willappear in the following` specification, andthe novel teatures ot the invention will be particularly pointed out in the appended claim.
YMy invention is illustrated in the accompanying (,lrawings, forming part otthis application, in which- Fig. fl is a plan view of the device in operative pogirtion7 Fig. 2 isa section along the line 2 2 ot Fia l.
Fig. 8 is a bottom plan view ot a portion of the device, n Fig.l 4: is a .plan view oi a kportion oil' the device,
Fig. 5 is a section along the line 5 5 ot Fig. 4,
Fig. 6 is a sectional view of a fragmentary portion of a modiiied form oit the device.
ln carrying out my invention l provide a cylindrical outer trame member 1, which is formed with an outwardly extending` flange 2 at its lower end. The trame member 1 is adapted to be embedded in concrete 3 or the like about an opening 4 in the manner pictured in Fig. 2 ot the accompanying drawings. It will be noted that the flange 2 serves as an anchor for the device.
The outer trame member 1 is fashioned with a plurality of angular abutments 5 which project inwardly. The abutments are located at spaced distances apart around the inner wall of the trame member 1 adjacent the lower end thereof and are Jformed with their inclined upper edge provided with .respect thereto.
`tion 11 ot' the inner trame 7.
rounded teeth G, as clearly shown in the drawings.
' A second or inner trame member 7 which also cylindrical in shape, is :formed with angular prolongations 8 which extend downwardly from its lower end. it will be noted that the inclined lower edge ot the angular prolongations 8 are provided with rounded teeth 9 which are arranged to mesh with the rounded teeth G ot the angular abutments 5. whereby the second trame member 7 is supported by the trarne member 1 and is adjustable vertically with The trame member 7 is Yformed with an inwardly extending annular rib 10 which is located near its upper end. The inner wall ot' the trame member 7 above the annular' rib 10 is beveled at 11, as best seen in Fig. 2.
A. cover or lid portion 12, which is preterably olf the shape shown in the drawings. is adapted to close the upper end ot the Jframe member 7, being seated upon the annular rib l0.. The edge of the cover 12 is beveled at 1.8 to assure a close tit with the beveled por The cover' 12 may be molded or formed with its upper surface plain or ornamented with any desired design. The under surface ot the cover 12 is provided with radially extending tapering ribs 14 which greatly strengthen. the same.
A, boss 15 formed with a slot or recess 16, adapted to receive the annular-.rib 10. is 'formed integrally with the cover 12, as best seen in Fig. 2 ot the drawings. It is obvious that the boss 15 may be Jformed separately trom the cover 12 and secured to the under surface thereof in any suitable manner, as by welding.
In order to securely maintain the cover 12 in position to close the frame 7 I provide a locking device that is adapted to cooperate with the boss 15. In attaining this object I provide-a bolt or pin 17 which extends through the cover 12 at a point diametrically opposite to the boss 15. A bar 18 is rigidly secured to the lower end of the bolt or pin 17 in any suitable manner, as by passing a pin 31 transversely through the bolt 17 and the bar 18. A nut 1 9 is screwed on the end of the bolt 17 to further prevent displacement of the bar 18. The outer end of the bar 18 is connected with the inner end of a second Clt bar by ineans of :i bolt 2l and a nut 22.
.he bolt 2l acts as a pivot about which the bar 2O may be inoved. The bar 20, which serves as the bolt in the fastening` device, extends through a tl-sliaped retaining inernber or keeper 23 which is torined integrally with the cover l2 or ina-y be rigidly secured to the under suriace thereof in any suitable manner, as by welding. lt is to be noted that the end of the bar 20 is in position to engage the under side ot the annular rib l0 when the locking device is in the position pictured in 2 and consequently, since the annular rib l() at a diainetrically opposite point is engaged by the slot 1G in the boss l5, the cover 12 is securely maintained in position. A ring 24; is connected with the upper end of' the pin 17 to present a convenient means tor operating' the locking device. A i'ecess 25 is provided in the upper surface ot the cover l2 to receive the ring 24.
.ln the modified forni of the device, a fragmentary portion ot which is pictured in Fig. G of the accoinpanyingdrawings, the pin i7 is torined with a squared upper end l2 which is adapted to receive a ley or the like (not shown) such as is ordinarily used in operating' units ot Water works plants, since it is sometimes desired to operate the locking device by ineans of such a key. V
.fin eye bolt 26 extends through the center ot the cover l2 and has a nut 27 screwed on its lower end. lts upper end, which is formed into an eye 29, connects 'with aring 28 which is normally disposed in a recess 30 which is provided in the upper surface ot the cover l2. The ring` 2S is provided to 'facilitate the removal ot the cover l2 troni the traine 7,' since the ring various part-s ot the device, the operation thereof may be readily understood and requires no detailed description. The lockingdevice described in the foregoing is operated by rotating the pin or bolt l?. Since the bar lS has a pivotal connection with the inner end of the bar 20, which is thel latching bolt of the device, rotation of the pin 17 will occasion a inovernent of the ba-r 2O toward the center ot the cover l2 until the end ot the bar 2O no longer engages the under side of the annular rib l0. The cover l2 may then be removed from the trarne member' 7.
`One oi the advantages of the device lies in the extensible featurel of the same. lt is obvious that when the inner traine inember is rotatably nioved, the rounded teeth 9 will successively engage the rounded teeth G, thereby causing` the upper portion of the traine ineniber 7 to project above the ground level. Consequently the possibility of any person falling through the manhole .trame t when the cover l2 has been removed, is reduced to a minimum.
l claim: a device of the class described, a trarne ineinber formed with an inwardly extending annular rib positioned at a spaced distance trein the upper edge thereof, a closure for said. trarne nieniber arranged to rest upon the upper sui-tace oi said annular rib, said closure being provided with a boss at its outer edge, said boss having a slot adapted to receive said i.ib,wvliei'eby a portion ot the boss underlies the latter when the closure is in operative position, said closure being also provided with an integral guide keeper deviending' from the lower surface thereof below the plane of said rib, and positioned at point dianietrically opposite saidL boss, a l oclringr ineinber carried by said closure and guided by said keeper, said looking rnernbei' being` arranged tor nioveinent into and out oit operative engagement with the under surface ot said rib, and means extending vthrough said closure and operable at will Leon esciivvnin