Abstract: A crown type cage for a ball bearing includes an annular main portion, a plurality of pillar portions protruding in an axial direction from the main portion at predetermined intervals in a peripheral direction, and a spherical pocket formed between the adjacent pillar portions and capable of holding balls. The pillar portion has a pair of claw portions of which tip end portions are spaced apart from each other, and a connection portion that connects the pair of claw portions. A bottom surface of the main portion is provided with a part protruding in the axial direction.

Abstract: An outer diameter of a claw portion is smaller than an outer diameter of a main portion, a radial width of the claw portion is ½ or less of a radial width of the main portion, an axial width from an upper surface of a connection portion of a pillar portion to a bottom surface of the main portion is ½ or less of an axial width of a crown type cage for a ball bearing, and in the main portion, an opening portion is provided between adjacent pockets.

Abstract: The present invention aims at providing a phone terminal over which the user who is attending the PoC talking can talk at a desired timing, a server, and a talking system having the phone terminals and the server. A talking system of the present invention is constructed such that a cellular phone A 10a transmits voice data to a server 20 while a floor is not granted by the server 20, and the server 20 has a storing portion for storing the voice data from a cellular phone to which the floor is not granted and transmits voice data read from the storing portion to a cellular phone B 10b after the cellular phone B 10b released the floor.

Abstract: The present invention aims at providing an electronic key lending method capable of ensuring the high security by a relatively easy method. An electronic key lending method of the present invention of lending an electronic key (7) that unlocks or locks an electronic lock (8) from a first communication terminal (10-1), includes an electronic key transmitting step of transmitting the electronic key (7) from the first communication terminal (10-1) to a second communication terminal (10-2) while an IMS session is established between the first communication terminal (10-1) and the second communication terminal (10-2).

Abstract: The present invention aims at providing a phone terminal over which the user who is attending the PoC talking can talk at a desired timing, a server, and a talking system having the phone terminals and the server. A talking system of the present invention is constructed such that a cellular phone A 10a transmits voice data to a server 20 while a floor is not granted by the server 20, and the server 20 has a storing portion for storing the voice data from a cellular phone to which the floor is not granted and transmits voice data read from the storing portion to a cellular phone B 10b after the cellular phone B 10b released the floor.

Abstract: The present invention aims at extending a talkable time allocated by a server at the user's will of the equipment. In a PoC service that implements a half duplex talk session using a packet communication among a plurality of equipments via a PoC server, the PoC server receives a talking time extend request from a user equipment 21 to which a floor is granted (step S801). Then, the PoC server grants the talking time extend request by determining that no floor take request is made by equipments except the user equipment 21 to which the floor is granted. Then, the PoC server transmits a talking time extend notification to the equipment to which the talking time extend request is granted (step S802).