GB2349168A - Padlocks - Google Patents

Abstract

A padlock comprising a body 2 provided with a bolt/shackle 6 which is moveable between a closed position in which it extends into a recess 7 and an open position in which it is at least partially retracted from said recess 7. The bolt/shackle 6 is held in the locked closed position by cambar 5 which is releaseable by integral locking mechanism 3 when operated by key 4.

Description

Locking Device This invention concerns locking devices having a wide range of uses for security purposes. In particular for double doors on buildings, gates, the rear of vans and almost any situation where conventional hasp and staple and padlock would be used. Padlocks are widely used for such purposes. However, padlocks exposed situations are vulnerable to tampering by unscrupulous persons. Most padlocks (except the very expensive) can be removed by using a stilson or wrench, which when twisted will break open either the shackle, or the staple to which it is attached.

Tbe present inventors objective is to overcome these weaknesses by providing a padlock which encloses both the shackle and the staple when in the locked position.

Accordingly this invention provides a padlock constructed of steel, which is then hardened to resist sawing or drilling. The shackle of which is enclosed in the locked position. The key cylinder is also pick and drill resistant and also replaceable by the key holder.

Preferable this padlock is then used only on an equally robust hasp and staple. Some commercially available hasp and staple are manufactured by chubb, yale era, assa, etc. which would be suitable for the purpose.

A preferred embodiment of the invention will now be described with reference rto the accompanying drawings in which: Figure 1. Shows an oblique front view of the padlock in the locked position.

Figure 2 Shows a rear view of the padlocked positions.

Figure 3 Shows the rear view of the padlock in the open position.

Figure 4 Shows the location of the spring and a ball bearing within the body of the padlock.

As shown in figure 1 the padlock comprises a body 2 complete with shackle 6 in the locked position. Shackle 6 is held in place by cam bar 5 which is rotated into open or locked position by cylinder 3 when operated by key 4. Euro or oval cylinders can be used for this purpose Figure 2 shows a rear view of padlock 2 with the void 7 out to receive a staple. It also shows the grub screw 8 which holds cylinder 3 in position.

Figure 3 shows a rear view of the padlock 2 in the open position with the shackle 6 withdrawn fully to release the staple but held in position by spring 10 and ball bearing 9.

Figure 4 shows the position of the blind hole 12 which allows insertion of spring 10 and ballbearing 9 during assembly. Hole 12 may be plugged if required after assembly.

It also shows that the circumferential cut out is held in the locked position by cam bar 5 and held in the position by ballbearing 9.

Figure 5. Shows a side view of the padlock 2 showing the void 7 milled deeply to receive a staple.

Figure 6. Shows the cam bar 5 with cut outs 12 cut from both sides to allow the release of shackle 6 when the key 4 is turned 90 either left or right. It also shows the cam end 13 which locates in the apperature of the cylinder 3 which turn when the key 4 is operated.

Figure7. Shows a front view of a suitable type of hasp 14 and staple 15 with hinged pin 16.

Figure 8. Shows a side view of hasp 14 and staplel5, with threaded bolts 17 and back plates 18 to secure it through the doors to be locked.

When the padlock is super imposed over the staple 15 and the shackle 6 is pushed into the locking position and the key 4 is removed the hasp and the staple 15 are secure together and cannot be removed without the key 4 as shown in figure 9.

A perferred option using option useing the same type of locking bar which secured two members together.

Figure 10. Shows two elements, 19 being the fixed staple with a protrusion 21 having a hole 22 cut through it to receive shackle 6.20 is a fixed bar with a void 23 cut in it to cover protrusion 21.

Figure 11 Shows a side view of both elements locked. 17 are threaded bolts with back plates 18 to secure the two elements to the members secured.

This type of locking bar would also be suitable for sliding doors.

Both types of locking devices would be zinc plated, galvanized or otherwise to resist rusting.

The present invention is not limited to the illustrations here with or to the shapes shown.

The present invention is not limited to the locking mechanism illustrated.

Claims (6)

1. A solid bodied padlock is provided wherein there is a recess in the rear thereof to receive a snug fitting staple and in which said recess is selectively dissected by a locking bar/shackle between the fully locked position whereby it retains the staple and a fully opened position in which the dissecting bar/shackle is withdrawn at least partially, beyond the body of the padlock and in which such movement being released by the operation of key operated locking mechanism within the padlock body, thereby allowing the removal of the padlock from the staple.

2. A padlock as claimed in claim 1 in which a cam bar is rotated between the fully locked position by operation of the key operated locking mechanism allowing selectively the release or retention of the locking bar/shackle.

3. A padlock as claimed in claim 1 and claim 2 in which access to the lockinglbar and staple is very restricted because they are contained within the recess located at the rear of the padlock thus considerably increasing the security thereof.

4. A padlock as claimed in preceding claims in which the key operated locking mechanism is provided by a half euro or half oval or round cylinder which is retained in the padlock by a pin or grub screw which is inaccessable when the padlock is locked onto the staple.

5. A padlock as claimed in the preceding claims in which the body of the padlock is constructed from case hardened steel or similar drill and saw resistant material.

6. A padlock substantially as herein described and illustrated in the accompanying drawings.