Patent Model - Pin-Jewel Holder

Maker and role
Ferdinand Gundorph, Patentee
 Production date
Jan 24 1882
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Object detail

Media/Materials
Brass
Measurements
1" (2.5cm)
Description
Gundorph's patent is "an improvement for a pin-jewel holder for setting the ruby-pin in the roller or disk on the shaft of the balance-wheel in watches..." The object of his invention "is to secure a means for setting a ruby-pin in a balance-disk in a more perfect manner than hitherto, so that the said pin shall be parallel to the axis of the balance-shaft, and the plane face of same perfectly tangent to the circle of oscillation of the balance." (Patent Number 252,660)
Collection
Rothschild Patent Model Collection
Object number
2015.14.3384a,b
Currently on display?
No
Maker

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