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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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10th Jul 2017, 4:40 pm | #1 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Mystery switch
Can anyone please identify this switch for me, its likely purpose and so on. It's momentary and I think it's telephone -related. Thankyou.
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10th Jul 2017, 4:44 pm | #2 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Mystery switch
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10th Jul 2017, 4:44 pm | #3 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,193
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Re: Mystery switch
It is telephony related. It's a single pole double throw micro switch.
The common version was Switch 5A/3 which was used in 706 telephones and possibly others. I assume the /4 variant fits another type of telephone. Soeone on here will know.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
10th Jul 2017, 5:05 pm | #4 |
Octode
Join Date: Mar 2011
Location: Sheffield, South Yorkshire, UK.
Posts: 1,453
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Re: Mystery switch
It's for a 746, probably a recall button — or rather the switch with which the button engages.
See page 3 of this: http://www.samhallas.co.uk/repositor.../0000/N848.pdf Last edited by ThePillenwerfer; 10th Jul 2017 at 5:10 pm. Reason: Link added. |
10th Jul 2017, 5:07 pm | #5 |
Octode
Join Date: Feb 2006
Location: Bristol, UK.
Posts: 1,030
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Re: Mystery switch
It looks like a standard V3 microswitch with a custom actuator.
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10th Jul 2017, 6:12 pm | #6 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Mystery switch
Thanks everyone. I uncovered one still in place in an old 746 - appears to be used as a recall button.
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10th Jul 2017, 9:37 pm | #7 |
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Re: Mystery switch
Depends on the BUTTON- it can be a recall (non locking ) or bell off ( locking ) as the wish desires.
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