|
DE818269C
|
|
Method and device for determining material defects in bars or strips made of non-ferrous metals
|
|
DE849309C
|
|
Device for regulating the oscillation frequency of the balance wheel of clockworks and other apparatus
|
|
US2541286A
|
|
Adjustment device for the frequency of spiral balances
|
|
GB657476A
|
|
A device for the testing and adjustment of the frequency of oscillation of a balance wheel
|
|
GB601734A
|
|
Alarm clock bell
|
|
GB531860A
|
|
Clock-work apparatus
|
|
GB485026A
|
|
Electric clockwork apparatus and method of synchronising same
|
|
GB488065A
|
|
Electric clockwork apparatus and method of synchronising same
|
|
GB422258A
|
|
Clockwork mechanism
|
|
GB249835A
|
|
Improvements in and relating to alarm clocks
|
|
DE424831C
|
|
Spring plate attachment for alarm clocks
|
|
DE424833C
|
|
Alarm clock
|
|
GB156617A
|
|
An alarm clock
|
