Security device

1. A security device, for a door in a doorway, comprising:

a floor-carriable portion comprising a blocking member;

a door-carriable portion comprising:

an operative portion, and

a mounting arrangement by which the operative portion is mountable to move, to differing radii relative to an axis of a hinge of the door, between:

a first position where the operable portion interfaces with and is configured to magnetically co-operate with the floor-carriable portion to lift the blocking member, to a blocking position, to act as a stop for the door in a communication position to stop the door opening past the communication position and

a second position where the door-carriable portion is offset from the floor-carriable portion to allow the door to open past the communication position; and

a further floor-carriable portion

configured to magnetically cooperate with the operative portion in the second position to stop the door opening past an open position beyond the communication position.

2. The device of claim 1 wherein the mounting arrangement is configured to enable the operative portion to move horizontally relative to the door.

3. The device of claim 1 wherein the mounting arrangement is configured to enable the operative portion to move parallel to the door.

4. The device of claim 1 wherein the blocking member is a pin.

5. The device of claim 4 wherein the floor-carriable portion comprises a guide sleeve for the pin to slide within for the lifting to the blocking position.

6. The device of claim 5 wherein an interior of the guide sleeve and an exterior of the pin have mutually different cross-sections to vent a bottom of the guide sleeve to a top of the guide sleeve.

7. The device of claim 5 wherein the guide sleeve is shaped to define a well under pin, and the pin and guide sleeve have complementary stop portions abutable to stop the pin falling into the well.

8. The device of claim 1 wherein the floor-carriable portion and the door-carriable portion are co-operable to hold the door in the communication position.

9. The device of claim 1 wherein the further floor-carriable portion is substantially identical to the floor-carriable portion.

10. The device of claim 1 wherein the further floor-carriable portion and the door-carriable portion are co-operable to hold the door in the open position.

11. An access point comprising:

the device of claim 1 ;

the door; and

the doorway.

12. A method of stopping a door of a doorway opening past a communication position at which the door is:

positioned to guard the doorway; and

ajar to enable the communication via the doorway,

the method comprising using a security device, the security device comprising:

a floor-carriable portion comprising a blocking member;

a door-carriable portion; and

a further floor-carriable portion;

wherein a door-carriable portion comprises:

an operative portion, and

a mounting arrangement by which the operative portion is mountable to move, to differing radii relative to an axis of a hinge of the door, between

a first position where the operable portion interfaces with and is configured to magnetically co-operate with the floor-carriable portion to lift the blocking member, to a blocking position, to act as a stop for the door in the communication position to stop the door opening past the communication position and

a second position where the door-carriable portion is offset from the floor-carriable portion to allow the door to open past the communication position; and

the further floor-carriable portion is magnetically co-operable with the operative portion in the second position to stop the door opening past an open position beyond the communication position.

13. A security device for a door in a doorway, the device comprising:

a floor-carriable portion; and

a door-carriable portion comprising:

an operative portion magnetically co-operable with the floor-carriable portion to limit opening of the door to stop the door opening past a communication position at which the door is:

positioned to guard the doorway; and

ajar to enable communication via the doorway; and

a mounting arrangement by which the operative portion is mountable to move, to differing radii relative to an axis of a hinge of the door, between

a first position where the operable portion interfaces with and is configured to magnetically co-operate with the floor-carriable portion to lift a blocking member, to a blocking position, to act as a stop for the door in the communication position to stop the door opening past the communication position and

a second position where the door-carriable portion is offset from the floor-carriable portion to allow the door to open past the communication position.

14. The device of claim 13 wherein the mounting arrangement is configured to enable the operative portion to move parallel to the door.

15. The device of claim 13 wherein:

the floor-carriable portion comprises a blocking member; and

the magnetic co-operation lifts the blocking member to a blocking position to stop the door opening past the communication position.

16. The device of claim 15 wherein the blocking member is a pin.

17. The device of claim 16 wherein the floor-carriable portion comprises a guide sleeve for the pin to slide within for the lifting to the blocking position.

18. The device of claim 17 wherein an interior of the guide sleeve and an exterior of the pin have mutually different cross-sections to vent a bottom of the guide sleeve to a top of the guide sleeve.

19. The device of claim 13 wherein the floor-carriable portion and the door-carriable portion are co-operable to hold the door in the communication position.

20. The device of claim 1 wherein the mounting arrangement comprises a bracket along which the operable portion slides.