The bearing of the rocking bar is in the center of rotation combined with a support or guide arrangement [g04b 5/18c]

Synchronous clock systems, e.g., provided with radiolink or using transmission of alternating current via existing power distribution lines, etc. [g04c 15/00h]

Setting the time-indicating means, e.g., by controlling the frequency or by changing the drive of the separate clocks by using an auxiliary motor, etc. [g04c 15/00h2]

Automatic stabilization of net frequency with regard to time, e.g., by comparing one of the clocks with an independent clock, means being provided for automatic compensation of disturbances, etc. [g04c 15/00h3]

Lubricating [g04c 15/00t]  (2)

Indicating the time optically by electric means (subclass 577 takes precedence; by mechanical means subclasses 139 and 162) [g04c 17/00] precedence; by mechanical means subclasses 139 and 162) [g04c 17/00]  (3)

By hands [g04c 17/00b]

With date indication [g04c 17/00b2]

By flaps [g04c 17/00f]

With date indication [g04c 17/00f2]

By a combination of different types of indicating devices, e.g., flaps and drums, etc. [g04c 17/00k]

Guide arrangement of the moving weight in a straight course [g04b 5/18d]

By discs (by drums subclass 573) [g04c 17/00s]  (1)

With date indication [g04c 17/00s2]  (1)

Electromagnetically driven, e.g., intermittently, etc. (clocks incorporating stepping motor subclass 490) [g04c 17/00s2b]  (5)

By drums or drumlike devices [g04c 17/00t]  (1)

With date indication [g04c 17/00t2]

Combined electro-optical and electromechanical displays [g04c 17/00v]  (2)

By electric lamps [g04c 17/02]  (2)

Producing optical time signals at prefixed times by electric means [g04c 19/00]  (1)

By electric lamps [g04c 19/02]  (1)

By indicating members moved electrically, e.g., flap, band, etc. [g04c 19/04]  (1)

Guide arrangement of the moving weight in a circular course [g04b 5/18f]

Producing acoustic time signals by electrical means (for mechanical clocks or watches subclasses 225 and 243) [g04c 21/00]  (1)

Constructional details (subclasses 582 and 588 take precedence) (sound- producing devices in general g10k, e.g., 1/00) [g04c 21/02]  (2)

Indicating the time of the day (acoustic indication of time subclass 217) [g04c 21/04]

By striking mechanism [g04c 21/06]  (1)

With snail [g04c 21/08]  (1)

With locking plate [g04c 21/10]

By electro-acoustic time means [g04c 21/12]

Electro-acoustic time announcement, i.e., spoken [g04c 21/14]  (1)

Producing the signals at adjustable fixed times [g04c 21/16]  (3)

By mechanically unlocking an electromechanical vibrator, e.g., actuated by the leakage flux of the electric driving means, etc. [g04c 21/18]  (1)

Suspension of the moving weight by elastic means (subclass 60 takes precedence) [g04b 5/18g]

Provided with means for sheeting off or temporarily stopping the signal [g04c 21/20f]

By closing a contact to ring an electromechanical alarm [g04c 21/20]  (1)

By the hand(s) or handlike members closing the contact [g04c 21/20b]

Put into action by the arbor of a mechanical alarm work [g04c 21/22]  (1)

Put into action by the spring of a mechanical alarm work [g04c 21/24]

Put into action by the vibrations caused by the operation of a mechanical alarm work [g04c 21/26]

By closing a contact to put into action electro-acoustic means, e.g., awakening by music, etc. [g04c 21/28]  (3)

With provision for a number of operations at different times, e.g., ringing the bells in a school, etc. [g04c 21/30]  (1)

By the hand(s) or handlike members closing the contacts [g04c 21/30b]

Giving indications at a number of places each at a different time, e.g., system of alarms in a hotel, etc. [g04c 21/32]

Driving weights; chains; chain wheels; arbors for chain wheels (wheels and spindles in general f16f) [g04b 1/08]

Bearing, guide arrangements, or suspension allowing movement in more than one plane, e.g., there is more than one moving weight, or more than one plane in which the weight moves, and it can change place relative to the clockwork, etc. [g04b 5/18k]

By the hand(s) or handlike members closing the contacts [g04c 21/32b]

Adjustable from the different places themselves [g04c 21/32k]

Devices on watches or similar portable timepieces [g04c 21/34]  (2)

Signal-repeating devices [g04c 21/36]  (2)