rivett608
Diamond
- Joined
- Oct 25, 2002
- Location
- Kansas City, Mo.
As with most tools... if one company makes one, so do the others.... These are also called Universal or Parallel Dividers. The black handled one at top left is the type seen in mid 19th century watchmaker's tool supply catalogs...... these were made in France, Germany and/or Switzerland. Center top is the Brown & Sharpe # 843, top right is the Kidd's patent (sept 28 1886) by The Hartford Tool Co and later bought out and marked as this example, Pratt & Whitney. In the middle left is Starrett's # 89, this was in production the longest, also came with ink and pencil tips for draftsman. Next is the J. Stevens Arms & Tool Co. #110 with micrometer adjust..... and at the bottom is a Massachusetts Tool Company # 63... one this and many others the cone point comes off to expose a needle point.....
A detail of the Watchmakers type.... beam about 1 1/2"...
A detail... these appear to have been hand filed and fitted.... an note the triangular cross section...
These are similar to trammels but different... here is the B & S with their # 845 trammels and the Stevens next to their #111 parallel divider with long bar and additional # 112 trammel heads....
A detail of the Stevens ....
And the detail of the B & S..... this is the early version with the fine adjustment..... can you imagine a factory made tool with this kind of fussy detail......there is a screw inside the tube.... the big knob at bottom locks the point bracket, the little knurled ball at top is spring loaded to the screw..... lift it and you can side the whole bracket for course adjust... then let go and it engages in the screw and a fine adjustment can be made.... now once locked if the screw is turned it will pop up instead of stripping out the threads... a built in safety....
[ 01-09-2007, 11:03 AM: Message edited by: rivett608 ]
A detail of the Watchmakers type.... beam about 1 1/2"...
A detail... these appear to have been hand filed and fitted.... an note the triangular cross section...
These are similar to trammels but different... here is the B & S with their # 845 trammels and the Stevens next to their #111 parallel divider with long bar and additional # 112 trammel heads....
A detail of the Stevens ....
And the detail of the B & S..... this is the early version with the fine adjustment..... can you imagine a factory made tool with this kind of fussy detail......there is a screw inside the tube.... the big knob at bottom locks the point bracket, the little knurled ball at top is spring loaded to the screw..... lift it and you can side the whole bracket for course adjust... then let go and it engages in the screw and a fine adjustment can be made.... now once locked if the screw is turned it will pop up instead of stripping out the threads... a built in safety....
[ 01-09-2007, 11:03 AM: Message edited by: rivett608 ]
