No. 51 697. 



Clocks and Pendulums. 



245 



51688. 1:1. 



51 690. 1 : 3. 



51 691. 1 : 4. 



51 695. 1 : 5. 



51 696. 1 : 5. 



s. d. 



51.691. Alarm Clock with switch (Gocht's), Figure, for accurate setting of the minutes 1. 5. 



After reaching the minute for which it has been set this clock gives a ring of the bell, at the 

 same time putting out of circuit the current at its terminals. 



51.692. Clock with 10-seconcl Signal, for Laboratories; the clock gives a soft signal every 



10 seconds 1. 2. 



51.693. --idem, with Half-minute Signal 1. 0. 



51.694. --idem, with Minute Signal 0.17.6 



51.695. Compensating Pendulum, on stand, Figure, with 9 brass and steel rods, swinging 



to V 2 seconds i 2. 10. 



51,695 a. - - i d e m, in simpler yet reliable form, with 2 zinc and 3 steel rods 1. 4. 



51.696. Compensating Pendulum, Figure, on stand with levelling screws, swinging accu- [ 

 rately to 1 / 2 second, with driving mechanism, escapement and electric contact device i 5. 0. 



>1,697. -- idem, with dial 



6. 5. 



Cl. 466, 3130, 4983, 

 629, 630. 



