1. A sweeping apparatus, comprising:
a frame, the frame including a means for attaching a pulling agent;
a first drive wheel supporting the frame; and
a first rotary brush member structure supported by the frame; and
a first traction drive mechanism mechanically connecting the first drive wheel to the first rotary brush member, the first traction drive mechanism configured to transfer power from the first drive wheel to the first rotary brush member, the first traction drive mechanism further configured to rotate the first brush member three complete rotations over a travel distance at least equal to the circumference of the first brush member.
2. The sweeping apparatus of claim 1, wherein the first traction drive mechanism is further configured to rotate the first brush member one complete rotation over a travel distance equal to no more than six times the circumference of the first brush member.
3. The sweeping apparatus of claim 1, further comprising:
a transport lift mechanism attached to the frame; and
at least one transport wheel attached to the transport lift mechanism;
wherein the transport lift mechanism is movable between a first position in which the frame is supported by at least the first drive wheel and a second position in which the frame is supported by the at least one transport wheel.
4. The sweeping apparatus of claim 1, further comprising a first brush height adjustment mechanism for adjusting a distance between the first rotary brush member with respect to ground over which the sweeping apparatus travels.
5. The sweeping apparatus of claim 1, further comprising:
a second drive wheel supporting the frame;
a second rotary brush member supported by the frame; and
a second traction drive mechanism mechanically connecting the second drive wheel to the second rotary brush member, the second traction drive mechanism configured to transfer power from the second drive wheel to the second rotary brush member, the second traction drive mechanism further configured to rotate the second brush member three complete rotations over a travel distance at least equal to the circumference of the first brush member.
6. The sweeping apparatus of claim 5, wherein the second traction drive mechanism is further configured to rotate the second brush member one complete rotation over a travel distance equal to no more than six times the circumference of the first brush member.
7. The sweeping apparatus of claim 5, wherein the first brush member and the second brush member are configured to rotate at different rotational speeds.
8. The sweeping apparatus of claim 5, further comprising:
a first brush height adjustment mechanism for adjusting a distance between the first rotary brush member with respect to ground over which the sweeping apparatus travels; and
a second brush height adjustment mechanism for adjusting a distance between the second rotary brush member with respect to the ground over which the sweeping apparatus travels.
9. The sweeping apparatus of claim 5, wherein the first brush member and the second brush member are configured to rotate at different rotational speeds.
10. The sweeping apparatus of claim 1, wherein the first traction drive mechanism includes a drive sprocket connected to the first drive wheel; a brush sprocket connected to the first rotary brush member; and a chain connecting the drive sprocket and the brush sprocket; wherein the drive sprocket and the brush sprocket have a ratio of at least 2.5:1.
11. The sweeping apparatus of claim 1, further comprising a drive chain adjustment mechanism, the drive chain adjustment mechanism operative to adjust chain tension between the drive sprocket and the brush sprocket.
12. A sweeping apparatus, comprising:
a frame, the frame including a means for attaching a pulling agent;
a first drive wheel supporting the frame; and
a first rotary brush member structure supported by the frame;
a first brush height adjustment mechanism for adjusting a distance between the first rotary brush member with respect to ground over which the sweeping apparatus travels;
a first traction drive mechanism mechanically connecting the first drive wheel to the first rotary brush member, the first traction drive mechanism configured to transfer power from the first drive wheel to the first rotary brush member, the first traction drive mechanism further configured to rotate the first brush member no less than one complete rotation over a travel distance equal to six times the circumference of the first brush member and no more than three complete rotations over a travel distance at least equal to the circumference of the first brush member;
a second drive wheel supporting the frame;
a second rotary brush member supported by the frame;
a second brush height adjustment mechanism for adjusting a distance between the second rotary brush member with respect to the ground over which the sweeping apparatus travels
a second traction drive mechanism mechanically connecting the second drive wheel to the second rotary brush member, the second traction drive mechanism configured to transfer power from the second drive wheel to the second rotary brush member, the second traction drive mechanism further configured to rotate the second brush member no less than one complete rotation over a travel distance equal to six times the circumference of the second brush member and no more than three complete rotations over a travel distance at least equal to the circumference of the second brush member;
a transport lift mechanism attached to the frame; and
at least one transport wheel attached to the transport lift mechanism;
wherein the transport lift mechanism is movable between a first position in which the frame is supported by at least the first and second drive wheels and a second position in which the frame is supported by the at least one transport wheel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of granting, to a user communications device, access to a service provided by a plurality of service communications devices, the method comprising the steps of
initiating a first communications link between the user communications device and a first one of the plurality of service communications devices;
generating an access key code;
storing a first data item in a first storage means of the user communications device, the first data item indicating the access key code;
characterised in that the access key code is indicative of the user communications device and the service; and the method further comprises the steps of
making the access key code available to at least a second one of the plurality of service communications devices via a communications network;
initiating a second communications link between the user communications device and the second service communications device; and
using the access key code to mutually authenticate the user communications device and the second service communications device.
2. A method according to claim 1, characterised in that
the user communications device and the plurality of service communications devices each comprise a Bluetooth communications unit;
the first and second communications links are Bluetooth communications links;
the access key code is a baseband link key; and
the step of generating an access key code is part of a Bluetooth pairing procedure.
3. A method according to claim 1, characterised in that the user communications device is a mobile radio terminal.
4. A method according to claim 1, characterised in that the first service communications device is a designated subscription communications device.
5. A method according to claim 1, characterised in that the method further comprises the steps of
transmitting a service identification code from the first service communications device to the user communications device via the first communications link;
storing a second data item in the first storage means in relation to the access key code, the second data item indicating the service identification code; and
the step of using the access key code to mutually authenticate the user communications device and the second service communications device further comprises the steps of
transmitting the service identification code from the second service communications device to the user communications device via the second communications link; and
retrieving, based on the service identification code, the access key code from the first storage means.
6. A method according to claim 1, characterised in that the method further comprises the step of using the access key code to generate an encryption key for encrypting the second communications link.
7. A method according to claim 1, characterised in that the step of generating an access key code comprises the steps of generating a first part of the access key code in the user communications device; generating a second part of the access key code in the first service communications device; transmitting the first part of the access key code from the user communications device to the first service communications device; and transmitting the second part of the access key code from the first service communications device to the user communications device.
8. A method according to claim 1, characterised in that the step of making the access key code available to at least a second one of the plurality of service communications devices via a communications network comprises the steps of
transmitting the access key code to the second service communications device; and
storing a third data item in a second storage means of the second service communications device, the third data item indicating the access key code.
9. A method according to claim 1, characterised in that the step of making the access key code available to at least a second one of the plurality of service communications devices via a communications network comprises the step of storing a fourth data item in a database, the fourth data item indicating the access key code; and
the step of using the access key code to mutually authenticate the user communications device and the second service communications device comprises the steps of
retrieving the access key code from the database; and
transmitting the retrieved access key code via the communications network to the second service communications device.
10. A communications system comprising a user communications device, a first and a second service communications device, the first and second service communications devices each providing a service;
the user communications device and the first and second service communications devices each including a respective transmitreceive unit for transmitting and receiving data signals via respective communications links between the user communications device and a selected one of the first and second service communications devices;
a selected one of the user communications device and the first service communications device comprising first processing means adapted to generate at least a part of an access key code during an initialisation procedure of a first communications link between the user communications device and the first service communications device, the access key code being indicative of the user communications device and the service;
the user communications device including first storage means adapted to store a first data item indicating the access key code; and
second processing means adapted to retrieve the access key code from the first storage means and to use the retrieved access key code during an authentication procedure of a second communications link between the user communications device and the second service communications device;
the system including a communications network interconnecting the first and second service communications devices and adapted to make the access key code available to at least the second service communications device;
the second service communications device including third processing means adapted to receive the access key code via the communications network and to use the received access key code during the authentication procedure of the second communications link.
11. A communications system according to claim 10, characterised in that
the transmitreceive units of the user communications device and the first and second service communications devices each comprise a Bluetooth communications unit;
the first and second communications links are Bluetooth communications links;
the access key code is a baseband link key; and
the initialisation procedure is a Bluetooth pairing procedure.
12. A communications system according to claim 10, characterised in that the user communications device is a mobile radio terminal.
13. A communications system according to claim 10, characterised in that the first service communications device is a designated subscription communications device.
14. A communications system according to claim 10, characterised in that
the first service communications device is adapted to transmit a service identification code to the user communications device via the first communications link;
the first storage means is adapted to store, in relation to the access key code, a second data item indicating the service identification code;
the second service communications device is adapted to transmit the service identification code to the user communications device via the second communications link during the authentication procedure; and
the second processing means is adapted to retrieve, based on the service identification code, the access key code from the first storage means.
15. A communications system according to claim 10, characterised in that a selected one of the second and third processing means is adapted to generate an encryption key for encrypting the second communications link on the basis of the access key code.
16. A communications system according to claim 10, characterised in that the second service communications device further comprises second storage means adapted to store a third data item indicating the access key code.
17. A communications system according to claim 10, characterised in that the system further comprises a third storage means connected to the communications network and adapted to store a fourth data item indicating the access key code; and the third processing means is adapted to retrieve the access key code from the third storage means via the communications network.
18. A user communications device comprising
a first transmitreceive unit for transmitting data signals to and receiving data signals from selected ones of a plurality of service communications devices providing a service;
first storage means adapted to store a first data item indicating an access key code generated during an initialisation procedure of a first communications link between the user communications device and a first one of the plurality of service communications devices, the access key code being indicative of the user communications device and the service;
first processing means adapted to retrieve the access key code from the first storage means and to use the retrieved access key code during an authentication procedure of a second communications link between the user communications device and a second one of the plurality of service communications devices.
19. A user communications device according to claim 18, characterised in that
the first transmitreceive unit comprises a Bluetooth communications unit;
the first and second communications links are Bluetooth communications links;
the access key code is a baseband link key; and
the initialisation procedure is a Bluetooth pairing procedure.
20. A user communications device according to claim 18, characterised in that the user communications device is a mobile radio terminal.
21. A user communications device according to claim 18, characterised in that
the first transmitreceive unit is adapted to receive a service identification code from the first service communications device via the first communications link;
the first storage means is adapted to store, in relation to the access key code, a second data item indicating the service identification code; and
the first transmitreceive unit is further adapted to receive, during the authentication procedure, the service identification code from the second service communications device via the second communications link; and
the first processing means is adapted to retrieve, based on the service identification code, the access key code from the first storage means.
22. A user communications device according to claim 18, characterised in that the first processing means is adapted to generate an encryption key for encrypting the second communications link on the basis of the access key code.
23. A user communications device according to claim 18, characterised in that the user communications device further comprises second processing means adapted to generate at least a part of the access key code.
24. A communications system comprising a first and a second service communications device each providing a service;
the first service communications device including
a first transmitreceive unit for transmitting data signals to and receiving data signals from a user communications device via a first communications link;
first processing means adapted to perform an initialisation procedure of the first communications link, the initialisation procedure including the generation of an access key code indicative of the user communications device and the service;
the system including a communications network interconnecting the first and second service communications devices and adapted to make the access key code available to at least the second service communications device;
the second service communications device including
a second transmitreceive unit for transmitting data signals to and receiving data signals from the user communications device via a second communications link;
second processing means adapted to receive the access key code via the communications network and to use the received access key code during an authentication procedure of the second communications link.
25. A communications system according to claim 24, characterised in that the first processing means is adapted to generate at least a part of the access key code.