US2029955A

US2029955A - Guard cap

Info

Publication number: US2029955A
Authority: US
Inventors: Taylor Henry Ray
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-11-07
Filing date: 1934-11-07
Publication date: 1936-02-04
Anticipated expiration: 1953-02-04

Description

2 Sheets-Sheet 1 H. R. TAYLOR GUARD CAP Filed Nov. 7, 1934 L/fH//vr Feb. 4, 1936.

H. R. TAYLQR Feb. 4,- 1936.

GUARD CAP 2 sheets-sheet 2 Filed Nov. 7, 1934 Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to a cap designed to prevent unauthorized tampering with valves.

It is an object of the invention to provide a cap 'which can readily be placed in position so as to surround the valve to be protected, it being impossible to remove the cap without the use of a proper key.

A further object is to provide a cap which will prevent tampering with the valve and with the lock used in connection with the cap.

With the foregoing and other objects in view which Will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawings the preferred form of. the invention has been shown,

In said drawings,

Figure 1 is a vertical section showing the drip cap locked in position, it being also shown, by broken lines, in one of its positions while being applied.

Figure 2 is a section on line 2 2, Figure 1.

Figure 3 is a section on line 3 3, Figure 1.

Figure 4 is a section on line 4 4, Figure 1.

Figure 5 is a section on line 5 5, Figure 1.

Figure 6 is a section on line 6 6, Figure 1.

Referring to the figures by characters of reference, A designates a riser surrounded by a pipe or casing B and to the upper end of this riser is connected a reducing nipple C on which is mounted the Valve D to be protected.

Mounted on the pipe B is a disk I which is joined to the pipe by welding it as shown at 2. 'Ihis disk has a central opening 3 through which the upper portion of the nipple C extends. 'Ihe disk is provided adjacent its margin with an upstanding hook 4 having a laterally extended bill 5 as shown particularly in Figure 5 and formed in the disk adjacent its margin at a point diametrically opposite hook 4 is an opening 6. Surrounding the opening is a protecting flange 'I welded or otherwise attached to the disk I and depending therefrom, this guard or protecting flange I being preferably substantially oblong as shown particularly in Figure 3.

To the pipe B is welded or otherwise fixedly connected a segmental shield 8 formed of an arcuate plate which embraces pipe B and extends through an arc of more than as will be noted by referring to Figure 4. This shield is preferably inclined upwardly from the pipe B and its outer arcuate edge is substantially in line with the corresponding portion of the edge of disk I.

The cap used in connection with the parts thus far described comprises a metal cylinder 9 closed at the top as shown at IIl and having an internal diameter slightly greater than the diameter of disk I. Extending inwardly from this cap is a retaining pin I I While extending inwardly from the cap at a point diametrically opposite this pin is a lug I2 having a downwardly extending finger I3 provided with an opening I4. This finger is of such size as to be insertable readily through the opening 6 when brought to position thereabove.

Supporting pins I5 similar to the pin I I can be extended inwardly from the cap 9 at points between said pin II and the lug I2 and it is to be understood that all of these pins as well as the lug occupy substantially the same plane.

A handle II can be extended outwardly from the lower portion of the cap.

In practice the cap is placed over the Valve D and lowered so as to position disk I therein in contact with pin II and the lower end of finger I3. The cap is then rotated until the bill 5 of hook 4 passes over pin II as shown in Figures 1 and 5. At that time linger I3 will arrive above the opening 6 and will drop thereinto so that disk I will support the weight of cap 9 through contact of lug I2 and pins II and I5 with the upper surface thereof. When the cap is thus located the guard or shield 8 will be positioned beneath finger I3 so that direct access to said iinger is prevented. A lock, Which can be in the form of a padlock I 6, is then held in the hand of the user who reaches upwardly under the cap through the space at the left of the shield 8 in Figure 1 and thence around pipe B until the shackle of the lock is brought into engagement with the apertured finger I3. The padlock is then closed and the cap obviously is securely fastened. Only by the use of a proper key inserted up into the cap in the same manner as heretofore described, can the cap be unfastened. Convenient access to the lock is prevented by the shield B.

After the lock has been unfastened and detached from the finger I3, the cap can be tilted by means of handle Il as shown by broken lines in Figure 1 so as to withdraw the finger from opening 6. While thus supported the cap can then be turned to disengage bill 5 from pin II whereupon it is possible to remove the cap and obtain access to the valve.

What is claimed is:

1. The combination with a valve, a riser leading thereto, and a pipe surrounding the riser, of a disk joined to said pipe, said disk having an opening therein, a hook upon the disk, an arcuate shield xedly joined to the pipe and located beneath the opening, a cap movable into position around the disk and shield, separate means carried by the cap for engaging the disk to support the cap, there being a linger depending from one of said means, said cap being rotatable re1- ative to the disk to position one of said means in engagement with the hook and to bring the finger into the opening, a guard depending from the disk and extending around the opening to house the end of the finger, and a removable lock insertable into the guard for engagement with the finger above the shield, said lock being suspended within and surrounded and protected by the cap.

2. The combination with a riser, a pipe extending therearound, and a valve carried by the riser, of a disk xedly connected to the pipe below the valve, a shield extending partly around and joined to the pipe below the disk, a cap movable to position around the disk and shield, cooperating means upon the cap and disk for bringing said cap and disk into interengagement when the cap is rotated relative to the disk, lock engaging means carried by the cap and cooperating with the disk for fastening the cap against removal from the disk, said means being positioned above the shield, and a removable lock insertable up- Wardly into the cap between the shield and disk for engagement with the lock engaging means, thereby to be surrounded and protected by the cap and shield.

HENRY RAY TAYLOR.