US1071577A - Device for preventing blowing off of manhole-covers. - Google Patents
Device for preventing blowing off of manhole-covers. Download PDFInfo
- Publication number
- US1071577A US1071577A US75554313A US1913755543A US1071577A US 1071577 A US1071577 A US 1071577A US 75554313 A US75554313 A US 75554313A US 1913755543 A US1913755543 A US 1913755543A US 1071577 A US1071577 A US 1071577A
- Authority
- US
- United States
- Prior art keywords
- manhole
- cover
- covers
- rod
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/71—Power-operated mechanisms for wings with automatic actuation responsive to temperature changes, rain, wind or noise
Definitions
- This invention relates to covers for manholes and particularly to manholes which are used in connection withunderground electric lighting systems, the object of the invention being to prevent accident when gases accumulate within the manhole and the electric current becomes short-circuited and causes an explosion.
- the invention consists in providing each manhole with a plurality of extensions projccting into the manhole through suitable guide members and interposing between said guide members and the headed ends of these-extensions yielding members such as springs so that'when an explosion of the gases occurs in the manhole the 'cover may be lifted sutliciently to permit. of the escape of the gases, said yielding members then returning the cover to its seat.
- iTl'i'e invention further consists in certain novel features of construction and arrange V ment of parts which will be fully understood by reference to the descriptionv of the drawings and to the claims hereinafter given.
- Figure 1 represents a plan view of a manhole seat and its cover
- Fig. 2 represents a transverse section of the same, the cutting plane being on line 2-2 on Fig. 1.
- -10 represents the wall of' a manhole of any wellknown construction having at itsupper end the annular seat 11 on which is normally? positioned a cover "12;.
- This cover 12 i'sprovided with a plurality of downward extensions or lugs 13 having openings 14 therethrough in each of which is positioned -.a nut 15.
- These nuts 15 are provided with heads which are positioned in depressions 16 in the upper face of the cover 12.
- Secured to the wall of the manhole in any wellknown manner are the guide members 17 and 18 through which extend the reciprocating rods 19, the upper end'of each of which is threaded to a nut 15.
- the lower end of each rod 19 is provided with a head 20 between which and the guide member 18 is interposed a helical spring 21 surrounding said rod. pm or shoulder 22 limiting the downward movement of said rod in the guide members 17 and 18 when said rods are disengagedfrom their nuts 15.
- Each of the nuts 15 is provided with a flaring mouth 23 the object of which is to assist in directing the upper
- Each rod 19 is provided with a endsof the rods19 into the center of the,
- the nut 15 may be removed from the outside permitting the rods 19 to drop in their-guides 17 and 18 until the pin or shoulder 22 comes into contact with the upper face of the guide member 18.
- said cover is positioned with the nuts 15 substantially in alinement with the rods 19.
- the upper ends of the rods 19 will enter the flaring mouth 23 of the nuts and be brought into alinement therewith.
- the nuts are then turned upon the threads of the rods, thereby slightly compressing the springs 21. While the parts are in this position, should gases accumulate in the manhole and be exploded by its normal closed position.
- a manhole cover having a plurality of openings'therethrough; a nut extending through each opening provided with a flaring mouth; a rod threaded to each nut and provided with a head at its lower end; a guide for said rod; and a spring surrounding each rod between said guide and said head.
- a manhole cover having a plurality of openings therethrough and a depression in its upper face in alinement with each opening; a headed nut positioned in each opening and its corresponding depression; a rod threaded to each nut and having a shoulder thereon; a guide for each rod; and a spring interposed between said shoulder and guide'normally retaining said cover to its seat but permitting limited upward movement thereof.
- a cover having a plurality of openings therethrough and a depression in its upper face in alinement with each opening; a headed nut positioned in each opening and its corresponding depression; a rod threaded to each nut and having a shoulder thereon; a guide for each rod; a spring interposed between said shoulder and guide normally retaining said cover to its seat'but permitting limited upward movement thereof ;,and means for limiting the downward movement of said rods when disengaged from said nuts.
Description
C. E. REGO.
Patented Aug. 26, 1913.
Jilly.
DEVICE FOR PREVENTING BLOWING OFF OF MANHOLE COVERS.
I APPLICATION FILED MAR.19. 1913v 1,071,577
ona'nnns E. nneo, or Bos'roN, MASSACHUSETTS.
DEVICE FOR PREVENTING BLOWING OFF OF MANHOLE-COVERS.
Specification of Letters Patent.
Patented Aug. 26, 1913.
Application tiled March 19, 1913. Serial No. 755,543. I I
To all whom it may concern Be it known that I, CHARLES E. Rnoo, a citizen of the United States of America, and a resident of East Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Devices for Preventing Blowing Off of Manhole-Covers, of which the following is a specification. i
This invention relates to covers for manholes and particularly to manholes which are used in connection withunderground electric lighting systems, the object of the invention being to prevent accident when gases accumulate within the manhole and the electric current becomes short-circuited and causes an explosion.
Ordinarily in a manhole as now'constructed the cover is simply placed upon its seat and when an explosion occurs the cover is hurled high in the air and is liable to cause great damage and sometimes loss of life. To i prevent this, provision is made whereby when such an explosion occurs the manhole cover is limited. in its upward movement, means being employed to prevent it from being hurled into the air.
The invention consists in providing each manhole with a plurality of extensions projccting into the manhole through suitable guide members and interposing between said guide members and the headed ends of these-extensions yielding members such as springs so that'when an explosion of the gases occurs in the manhole the 'cover may be lifted sutliciently to permit. of the escape of the gases, said yielding members then returning the cover to its seat.
iTl'i'e invention further consists in certain novel features of construction and arrange V ment of parts which will be fully understood by reference to the descriptionv of the drawings and to the claims hereinafter given.
Of the drawings: Figure 1 represents a plan view of a manhole seat and its cover, and Fig. 2 represents a transverse section of the same, the cutting plane being on line 2-2 on Fig. 1.
Similar characters designate like parts throughout the drawings.
In the drawings,-10 represents the wall of' a manhole of any wellknown construction having at itsupper end the annular seat 11 on which is normally? positioned a cover "12;.
This cover 12 i'sprovided with a plurality of downward extensions or lugs 13 having openings 14 therethrough in each of which is positioned -.a nut 15. These nuts 15 are provided with heads which are positioned in depressions 16 in the upper face of the cover 12. Secured to the wall of the manhole in any wellknown manner are the guide members 17 and 18 through which extend the reciprocating rods 19, the upper end'of each of which is threaded to a nut 15. The lower end of each rod 19 is provided with a head 20 between which and the guide member 18 is interposed a helical spring 21 surrounding said rod. pm or shoulder 22 limiting the downward movement of said rod in the guide members 17 and 18 when said rods are disengagedfrom their nuts 15. Each of the nuts 15 is provided with a flaring mouth 23 the object of which is to assist in directing the upper Each rod 19 is provided with a endsof the rods19 into the center of the,
WVhen it is desired to secure access to the manhole the nut 15 may be removed from the outside permitting the rods 19 to drop in their- guides 17 and 18 until the pin or shoulder 22 comes into contact with the upper face of the guide member 18. When it is desired to replace the cover said cover is positioned with the nuts 15 substantially in alinement with the rods 19. As the cover is returned to its seat 11 the upper ends of the rods 19 will enter the flaring mouth 23 of the nuts and be brought into alinement therewith. The nuts are then turned upon the threads of the rods, thereby slightly compressing the springs 21. While the parts are in this position, should gases accumulate in the manhole and be exploded by its normal closed position. i
It is believed that the'operatibn and many advantages of the invention will be fully understood from the foregoing description.
said cover to "Having thus described my invention, I
r claim': device of the class described, the] -'1. In a combination of a manhole Cov i i means within the manhole normally secured to said'cover' permitting'limited movement to said cover from the manhole openand a spring surrounding each rod between said guide and said head.
3. In a device of the class described, the combination of a manhole cover having a plurality of openings'therethrough; a nut extending through each opening provided with a flaring mouth; a rod threaded to each nut and provided with a head at its lower end; a guide for said rod; and a spring surrounding each rod between said guide and said head. v v
4. In a device of the class described, the combination of a manhole cover having a plurality of openings therethrough and a depression in its upper face in alinement with each opening; a headed nut positioned in each opening and its corresponding depression; a rod threaded to each nut and having a shoulder thereon; a guide for each rod; and a spring interposed between said shoulder and guide'normally retaining said cover to its seat but permitting limited upward movement thereof.
5. In a device ofthe class described, the combination of a cover having a plurality of openings therethrough and a depression in its upper face in alinement with each opening; a headed nut positioned in each opening and its corresponding depression; a rod threaded to each nut and having a shoulder thereon; a guide for each rod; a spring interposed between said shoulder and guide normally retaining said cover to its seat'but permitting limited upward movement thereof ;,and means for limiting the downward movement of said rods when disengaged from said nuts.
Signed by me at 4 Post Office -S,q., Boston, Mass, this 14th day of March, 1913.
CHARLES E. REUO.
Witnesses:
WALTER E. LOMBARD, NATHAN C. LoMnAnn'.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
Washington, D. C."
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75554313A US1071577A (en) | 1913-03-19 | 1913-03-19 | Device for preventing blowing off of manhole-covers. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75554313A US1071577A (en) | 1913-03-19 | 1913-03-19 | Device for preventing blowing off of manhole-covers. |
Publications (1)
Publication Number | Publication Date |
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US1071577A true US1071577A (en) | 1913-08-26 |
Family
ID=3139810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US75554313A Expired - Lifetime US1071577A (en) | 1913-03-19 | 1913-03-19 | Device for preventing blowing off of manhole-covers. |
Country Status (1)
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US (1) | US1071577A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5611640A (en) * | 1994-05-27 | 1997-03-18 | Bowman; Harold M. | Method and apparatus for anchoring a utility grate cover |
US5628152A (en) * | 1995-08-16 | 1997-05-13 | Bowman; Harold M. | Adjustable manhole cover support with shield |
US5697729A (en) * | 1993-07-02 | 1997-12-16 | Bowman; Harold M. | Anchor for utility access hole support insert |
US6007270A (en) * | 1993-07-02 | 1999-12-28 | Bowman; Harold M. | Manhole frame assembly |
AT408106B (en) * | 1995-03-27 | 2001-09-25 | Feit Josef | Vertically adjustable manhole cover or road cap and method of fitting it in a road |
US6350081B1 (en) | 2000-07-25 | 2002-02-26 | Department Of Water And Power City Of Los Angeles | Manhole restraining system for venting out explosive gases in a manhole |
US6551015B1 (en) | 2000-07-25 | 2003-04-22 | Department Of Water And Power City Of Los Angeles | Method of and system for venting out buildup of explosive gases in a manhole |
US20070039248A1 (en) * | 2003-06-18 | 2007-02-22 | Rhodes Derrick A | Utility portal |
DE102013110452A1 (en) * | 2013-09-20 | 2015-03-26 | Meierguss Limburg Gmbh | manhole cover |
US9004810B2 (en) * | 2012-12-13 | 2015-04-14 | EJ USA, Inc. | Explosion mitigating cover |
US9340948B2 (en) * | 2014-10-01 | 2016-05-17 | EJ USA, Inc. | Explosion mitigating vault |
CN107142972A (en) * | 2017-07-18 | 2017-09-08 | 荆门天阁动力机械科技有限责任公司 | A kind of waterproof rushes Safety well cover |
CN107190780A (en) * | 2017-07-18 | 2017-09-22 | 荆门天阁动力机械科技有限责任公司 | A kind of highway safety well lid |
CN107227756A (en) * | 2017-07-18 | 2017-10-03 | 刘卫东 | A kind of Safety well cover |
CN107313459A (en) * | 2017-07-18 | 2017-11-03 | 荆门天阁动力机械科技有限责任公司 | safety well cover |
-
1913
- 1913-03-19 US US75554313A patent/US1071577A/en not_active Expired - Lifetime
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5697729A (en) * | 1993-07-02 | 1997-12-16 | Bowman; Harold M. | Anchor for utility access hole support insert |
US6007270A (en) * | 1993-07-02 | 1999-12-28 | Bowman; Harold M. | Manhole frame assembly |
US5611640A (en) * | 1994-05-27 | 1997-03-18 | Bowman; Harold M. | Method and apparatus for anchoring a utility grate cover |
AT408106B (en) * | 1995-03-27 | 2001-09-25 | Feit Josef | Vertically adjustable manhole cover or road cap and method of fitting it in a road |
US5628152A (en) * | 1995-08-16 | 1997-05-13 | Bowman; Harold M. | Adjustable manhole cover support with shield |
US6350081B1 (en) | 2000-07-25 | 2002-02-26 | Department Of Water And Power City Of Los Angeles | Manhole restraining system for venting out explosive gases in a manhole |
US6551015B1 (en) | 2000-07-25 | 2003-04-22 | Department Of Water And Power City Of Los Angeles | Method of and system for venting out buildup of explosive gases in a manhole |
AU2004248079B2 (en) * | 2003-06-18 | 2009-09-17 | Derrick Anthony Rhodes | A utility portal |
US20070039248A1 (en) * | 2003-06-18 | 2007-02-22 | Rhodes Derrick A | Utility portal |
US9004810B2 (en) * | 2012-12-13 | 2015-04-14 | EJ USA, Inc. | Explosion mitigating cover |
DE102013110452A1 (en) * | 2013-09-20 | 2015-03-26 | Meierguss Limburg Gmbh | manhole cover |
US9340948B2 (en) * | 2014-10-01 | 2016-05-17 | EJ USA, Inc. | Explosion mitigating vault |
CN107142972A (en) * | 2017-07-18 | 2017-09-08 | 荆门天阁动力机械科技有限责任公司 | A kind of waterproof rushes Safety well cover |
CN107190780A (en) * | 2017-07-18 | 2017-09-22 | 荆门天阁动力机械科技有限责任公司 | A kind of highway safety well lid |
CN107227756A (en) * | 2017-07-18 | 2017-10-03 | 刘卫东 | A kind of Safety well cover |
CN107313459A (en) * | 2017-07-18 | 2017-11-03 | 荆门天阁动力机械科技有限责任公司 | safety well cover |
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