TYPE 19—Stromberg Synchronous Wired (56th Minute)

For a list of Type 19 clocks, see the chart on the first page of this appendix.

This clock is normally operated by 120Vac/24Vac. Relay K5 is normally operated to supply motor power. Relay K6 activates each hour from HH:56:10 to HH:56:18, causing an eight-second signal to be transmitted on the correction line for hourly correction. Relay K6 activates every 12 hours, from 11:56:36 to 11:56:50, causing an additional 14-second signal to be transmitted on the correction line for 12-hour correction. During power interruptions and automatic clock resetting, relay K5 is deactivated.

Note:

Lathem SS Modified wall clocks operate according to the above signal operation if modified to reference the minute and second hands to HH:57:16 (versus HH:59:00) and the hour hand to 12:00 (versus 6:00).

X = Normally open contact

I = Normally closed contact

1 = V250LA4 MOV or equal

 

 

 

RELAY

 

 

 

RELAY

 

 

 

 

 

 

 

K5 (K7)

 

 

 

K6 (K8)

 

 

 

 

 

 

 

 

x

 

x

I

 

I

 

 

 

 

 

 

 

x

 

 

CLK1 OR CLK2

 

 

 

 

 

 

 

MASTER CLOCK

1

2

3

4

5

6

7

8

FIELD CONNECTIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CORRECTION COIL

10 ASB MAX.

 

 

 

 

 

 

 

 

120Vac

 

 

 

 

 

 

 

RUN MOTOR

 

 

1

 

1

 

 

 

1

AC RTN

 

 

 

 

 

 

 

RETURN

Figure B-22

Stromberg Synchronous Wired (56th Minute)

24A715/24A715M Master Clock Installation Manual

B-25