Improvements in or connected with Braces, Bit-stocks, or the like.
Year: 1894

page_text: Date of Application, 27th June, 1894-Accepted, 28th July, 1894
COMPLETE SPECIFICATION.
Improvements in or connected with Braces, Bit-stocks, or the like.
A communication by ALBERT BREHM, of 21, Zwinglistrasse, Berlin, in the
Empire of Germany, Locksmith.
I, WILLIAM PHILLIPS THOMPSON, F.C.S. M.L.M.E. of The Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, and 6 Bank Street, Manchester, both
in the County of Lancaster, and 323 High Holborn, in the County of Middlesex,
Civil Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This invention has for its object a bit holding device for braces, bit stocks or the
like which enables a ready and secure clamping of the bit to be effected and pre-
vents the latter from slipping out of the socket when motion of the brace is reversed
for withdrawal.
In the accompanying drawings
Figure 1 shows the improved bit holding device applied to a hand brace.
Figures 2 and 3 are sections of the same full size, whilst
Figure 4 is a separate view of the method of attaching the bit.
The hand brace a of the usual form is provided with a screwed end 6, having flat
tapering sockets for receiving the tang of the bit d. Over the screwed end b fits
a nut fin which is movably arranged a plate g with a ring h attached thereto, the
plate g being formed with a slot. The ring his firmly connected to the plate g
to allow of the latter being turned from the outside and it may also be roughened
on its periphery for this object. The nut f, which may be also partially roughened
or made of a hexagonal shape, fits easily on the thread of the end b. The bit d,
the shank e of which is, as usual, tapered, may be readily and securely attached to
the brace in the following manner :-
Assuming that the plate g is turned with its slot coinciding with the socket c of
the screwed end 6, the tang of the bit d is inserted into the brace socket. Plate g
s then turned by means of its ring / about 90°, so that its slot lies across the brace
ocket and the nut is then tightened up. By this means the bit is retained with
ts tang d in the socket c'so that it can neither become loose nor fall out. The bit
s removed in a simple way by slackening the nut f so far that plate g may be
ifted by means of its ring away from the end of the brace, whereupon the said
plate g may be turned until its slot coincides with the brace socket. The screwed
end 6 may if desired have cross sockets for larger and smaller bits, but plate
nust only have a rectangular slot in order to securely clamp the tang d of the bit
n the end b.
Having now particularly described and ascertained the nature of the said inven-
ion and in what manner the same is to be performed, as communicated to me
y my foreign correspondent, I declare that what I claim is :-
An improved bit-holding device for braces, bit stocks or the like consisting of a
lotted plate g arranged in front of the brace socket and adapted to be clamped
ecurely thereto by means of a nut f screwed on the brace end, whereby, on

page_text: turning the plate 9 after the insertion of the bit and then tightening up the nut f, a
ready and secure clamping of the bit in position is effected, substantially as described
and illustrated.
(1894
Dated this 26th dex of June 1894.
WM. P. THOMPSON & Co.,
Agents.