Shop bell

[Dave H (MI)]

I have this dual bell that I am going to adopt into an alarm for the shop. The junction strip has very thin (phone line size) wires. This diagram is inside the cover to the box. A red wire attaches to one terminal, a black at the opposite end. Two terminals in between with a jumper and an unidentified electronic component. The junction strip is attached to a solenoid and, guessing from how older bells operate, the unidentified component somehow breaks current to open and close the solenoid which then makes the hammer strike the bells repeatedly. Or something like that! What I do not know from looking at the diagram is what kind of voltage to use. Is there anything in this picture that gives those who know about these things the answer? Anyone know what the unknown item on the jumper might be?

 

[Dave H (MI)]

Picture

 

[RayP(MI)]

I have this dual bell that I am going to adopt into an alarm for the shop. The junction strip has very thin (phone line size) wires. This diagram is inside the cover to the box. A red wire attaches to one terminal, a black at the opposite end. Two terminals in between with a jumper and an unidentified electronic component. The junction strip is attached to a solenoid and, guessing from how older bells operate, the unidentified component somehow breaks current to open and close the solenoid which then makes the hammer strike the bells repeatedly. Or something like that! What I do not know from looking at the diagram is what kind of voltage to use. Is there anything in this picture that gives those who know about these things the answer? Anyone know what the unknown item on the jumper might be?

The unknown component is a capacitor. no idea of rating.

 

[Tony in SD]

I have this dual bell that I am going to adopt into an alarm for the shop. The junction strip has very thin (phone line size) wires. This diagram is inside the cover to the box. A red wire attaches to one terminal, a black at the opposite end. Two terminals in between with a jumper and an unidentified electronic component. The junction strip is attached to a solenoid and, guessing from how older bells operate, the unidentified component somehow breaks current to open and close the solenoid which then makes the hammer strike the bells repeatedly. Or something like that! What I do not know from looking at the diagram is what kind of voltage to use. Is there anything in this picture that gives those who know about these things the answer? Anyone know what the unknown item on the jumper might be?

Typical ringer voltage is about 90 VAC at about 20Hz. That should ring the bell if the coils are good. The ringer probably has a short duty cycle because the bell only rings for a short time.

 

[Janicholson]

PictureView attachment 64258

Most door bells operate at 15 to 16 volts from a transformer. No high voltage is used at the bell or button. The capacitor reduces static and RFI.

 

[Absent Minded Farmer]

PictureView attachment 64258

What was it's original purpose?

If it was for the phones, it would be 48v.

Otherwise, just plug it in to a variable transformer & apply more juice until you get the desired result.

Mike

 

[wore out]

Typical ringer voltage is about 90 VAC at about 20Hz. That should ring the bell if the coils are good. The ringer probably has a short duty cycle because the bell only rings for a short time.

Yep, phone ringer. Shows leads from L1 and L2 going to C. O., "phonespeak" for "Central Office".

Other note "REN = 1.0" means "Ringer Equivalence Number" is 1.0, basically it has the current draw or possibly impedance of a "standard" phone ringer.

If you GOOGLE "Phone ringer generator" you will find lots of units that will generate the correct voltage and frequency to ptoperly ring your phone bell from a 12 Volt DC source.

 

[Tony in SD]

What was it's original purpose?

If it was for the phones, it would be 48v.

Otherwise, just plug it in to a variable transformer & apply more juice until you get the desired result.

Mike

Sorry -48VDC is used to operate the phone and will not ring the bell. The bell is activated by about 90 VAC that is sent to the phone if it is on hook. On hook is determined by the current of the -48 VDC.

 

[DaveBN]

I agree, that bell is designed to ring from a standard telephone line. If you connect it properly it should be very loud. We used them in factories with loud ambient noise and they could be heard very well.
Look up Dan Mac Bell and you will probably see a picture of your bell.
Dave

 

[Dave H (MI)]

PictureView attachment 64258

Much appreciated. Not sure what I am going to do with it now.