FRAME BRAZE-ON FITTINGS
With
perhaps the exception of track bikes that by their very nature, are
spartan, Scot's were fitted with a variety of additional braze-on's
to accommodate particular types of gear, accessories or other components.
These can be used to assist dating of a frame, though only in a very
broad sense, as it was not uncommon to have the originals removed and
replaced with different type as the customers equipment changed and
when the frames were refurbished or brought up to date.
To help identify what each particular braze-on was used for, these are
examples of the more common ones.
BRAKE CABLE CLIP
Whilst
many machines pre-1939 were not fitted with any 'fixed' means
of securing the brake cable outer to the frame, This type of clip
was used on some frames until about 1948 as a more permanent solution
than a band-on steel cable clamp. Made of spring steel these were
brazed to the underside of the top tube in three places, supporting
the rear brake cable as it ran from front to back.
From 1948 Rattray's used cable stops to route the cable, and these
clips were no longer required. |
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GEAR
CABLE GUIDES
To
solve the problem of bare inner cables running from gear levers
to gear changing equipment, Rattray's often used small pulleys.
In this particular case, a small bracket on which the pulley pivots,
is brazed to the top of the bracket shell.
A single pulley here was generally for routing a cable to a derailleur
type mechanism. Where equipped with front & rear derailleurs
there are often two pulleys combined. This arrangement is often
found on frames from the early 1950's that used Cyclo or Simplex
type derailleurs.
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The
late 50's saw the pulley arrangement replaced by simpler but almost
as effective pressed steel guide. These could be single channel
and on the right-hand side, for routing a gear cable to the rear
derailleur, or as seen here, with a second channel for passing
the cable up to the front derailleur., provided it could be operated
by a right-hand fed cable. |
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GEAR
CABLE STOP
To
allow bare-wire cable runs to the rear derailleur, a braze-on
stop was added to the top of the right-hand chainstay. The bare
cable running from the pulley or guide was fed in to a cable outer
here, from where it ran to the derailleur. The same type of stop
can occasionally be found on the left-hand side of the downtube
at the bottom, to feed the cable up to a front derailleur. |
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LAMP BRACKET BOSS
Fitted
to many Scot's, this boss was used to bolt the almost "industry
standard" lamp bracket to the front forks. Rattray's generally
used brackets and bosses produced by Chater-Lea.
Generally
these were brazed on the right-hand fork blade however some machines
for export had them fitted to the left to suit the driving 'hand'
of the country they were going to, for example on the left for
Canada as shown on the adjacent image.
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MUDGUARD
BRACKET
Until
around 1947 Scot frames that were or could be fitted with mudguards,
had these brackets brazed to the bottom of each seat stay, and
at the rear of the fork legs.
With the change in style of frame ends (dropouts) came integral
mudguard eyes and separate these brackets were no longer required
nor fitted.
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PUMP
(INFLATOR) PEG
Pump
Pegs can be found fitted on all the main tubes of the frame and
popular locations were on top of the Down tube, underneath the
Top Tube, and in front or behind the Seat Tube (at one time centrally
placed on the tube, but generally offset to the right of the frame,
to allow room for mudguards.
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Copyright © 1999-2003 R.Reid Last Updated
Thursday, 16-Oct-2003 17:28
hrs.
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