Standpipe cap locking means
OwnerLouis J. Sampleinventor
Life of this patent
Estimating the term…
Abstract
Unauthorized removal of the cap from a standpipe, such as a fire line standpipe, is prevented through use of a bent metal bar and a nipple formed at the center of the standpipe cap. The bar has an opening to accept the nipple extending from the standpipe cap, and a slot to receive a metal pin which prevents movement of the standpipe cap, rotation of the cap being prevented by additional means formed on the cap and bar. The bar can be so formed as to also prevent unauthorized removal of the handwheel of the valve which permits liquid flow through the standpipe opening.
Claims12
In a system for controlling the flow of a fluid, said system including an outlet port for said fluid and a valve to control the flow to said outlet port, said outlet port being covered by a threaded cap, said cap having a face portion and a depending skirt, the improvement which comprises means for preventing unauthorized removal of said cap including:
- a. a headed pin mounted, essentially, in the center of said face portion of said cap;
- b. a slotted bar overlying said cap, said headed pin lying within the slot in said bar, the head of said pin preventing removal of said bar from said cap;
- c. transverse slots formed in said bar, one transverse slot lying on each side of the headed pin slot in said bar, said transverse slots being aligned and so positioned that when said bar is moved to one extremity relative to said headed pin, said headed pin abutting an end of the slot in said bar, the transverse slots are aligned diametrically opposite the part of said pin adjoining the end of said slot;
- d. means extending from said bar, essentially parallel with said skirt of the said cap;
- e. at least one extension formed on said skirt to abut said means extending from said bar when said bar is in an extreme position relative to said pin;
- f. means to prevent rotation of said bar;
- and
- g. means for insertion through the transverse slots formed in said bar to abut the part of said pin diametrically opposite the part of said pin adjoining the end of said slot, so as to prevent movement of said bar.
Dependencies are inferred from the claim text.