Year: 1884

page_text: F, chamber for pawl.
It will be seen that the collars A A on the spindle B are turned on the angle and
the pawl C made to fit the same; the pawl being also placed at an angle to the
spindle.
Thus in moving the stock D forward the pawl C is gripped between the
collars A. A thus working the spindle B-in moving the stock the reverse way the
pressure is released, a fresh grip is then taken and so on.
The cover E may be made to fit tightly with a small lip or cut, or be otherwise
conveniently arranged to be taken out when it is desired to oil the inside.
The pawl may be made solid or hollow and with or without a spring, the stock
preferably of malleable cast iron, the tongue of steel and the spindle of wrought
iron, the whole of the spindle being turned up in a lathe.
My improved brace may however be made of any suitable materials and in all
sizes.

page_text: I RICHARD STUART SOLOMON, of N° 11 Strand Street, Cape Town, in the
Colony of Cape of Good Hope, Ironmonger, do hereby declare the nature of my
invention for FRICTION DRILLING BRACE and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to an improved construction of drilling-braces, consisting
in the substitution of a simple application of friction in lieu of the ordinary spring
and ratchet; and among the objects of my improvements are to avoid the loss of
time incurred when working in a limited space with the ordinary ratchet-brace,
and to obtain a more durable brace, one less likely to get out of order, that can be
repaired at less cost and with greater ease, and which, having bearings double the
usual thickness and all the action well protected, is less liable to be injured by rust
and dust than the ordinary brace. I attain these objects by the mechanism
illustrated in the accompanying drawings in which :-
Figure 1 is a sectional elevation of a brace embodying my improvements: and
Figure 2 a sectional plan of same.
Similar letters refer to similar parts in each figure.
A. A are beveled collars on the spindle B; C, the pawl; D, the stock; E, cover;
F chamber for pawl. It will be seen that the collars A A on the spindle B are
turned on the same angle, and the pawl C made to fit the same, the pawl being also
placed at an angle to the spindle-Thus in moving the stock D forward the pawl C
is gripped between the collars A A, thus working the spindle B. In moving the
stock the reverse way the pressure is released, a fresh grip is then taken, and so on.
The cover E may be made to fit tightly with a small lip or cut, or be otherwise
conveniently arranged to be taken out when it is desired to oil the inside.
The pawl may be made solid or hollow, and with or without a spring, the stock
preferably of malleable cast-iron, the tongue of steel, and the spindle of wrought
iron, the whole of the spindle being turned up in a lathe.
My improved brace may however be made of any suitable materials and in all
sizes.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is-
The combination in a drilling brace of the collars A. A forming a tapered or
V-shaped groove on the spindle B, with the pawl C, set at an angle to the spindle
in the angular chamber or recess F in the stock D, the whole constructed, combined,
and arranged to operate the brace by friction, substantially as described.
Dated this Third day of July 1885.