|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||33/414 ; 33/393|
|발명자 / 주소|
|인용정보||피인용 횟수 : 7 인용 특허 : 0|
The invention contemplates a plumb-indicating and marking tool whereby marking a plumb line on a wall or other structure is a simple one-handed operation, so that the user, who may be in an otherwise precarious position on a ladder, may have one hand free at all times to assure his own personal safety. A casing encloses a reeled chalk line as well as a plumb bob connected to the chalk line, and the reel may be releasably locked for the retracted or for any desired line pay-out condition. Provision is made for fastening the casing to the user\s belt, in u...
In combination, a casing, a reel mounted for rotation within said casing and externally accessible crank means for actuating said reel, said casing being characterized by a generally tubular open-ended wall on an axis substantially tangential to said reel, a plumb bob sized for reception via the open end of said tubular wall, a chalk line wound upon said reel and connected at its free end to said plumb bob, and selectively operable brake means for retaining a selected wound-line position of said reel in said casing; said casing having a chalk-admission o...