Improvements in Handles or Holders for Tools.
Year: 1898

page_text: Date of Application, 11th Nov., 1898-Accepted, 28th Jan., 1899
COMPLETE SPECIFICATION.
Improvements in Handles or Holders for Tools.
I, ABRAHAM JOHANNES LAMBERTUS HAVERKAMP, of 78, Rokin, Amsterdam,
Holland, 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:-
-
The object of this invention is a handle or holder for tools of all kinds, especially
for screw-drivers, boring tools and the like, in which, while any desired tool is
being used, it has to be turned in one direction, whilst, for removing the tool
from the piece of work, it must be turned in the opposite direction.
"
In the tool-holders or handles hitherto introduced, for implements which are
known as
universal hafts," it is necessary, between each forward and backward
movement of the tool, to release the handle and alter the position of the hand for
the other movement. This maturally has been attended with a number of dis-
advantages, the most important of which is loss of time.
By this invention, the releasing of the handle is rendered superfluous; the
handle is simply held in the hand and moved to and fro. This is rendered possible
by the introduction of a catch contrivance between the handle proper and the actual
tool-holder, which enables the upper part of the handle to be rotated against the
lower part and the tool, whilst both are rigidly coupled in the other direction.
The object of the invention is shewn in the accompanying drawing in vertical
section.
The handle proper 1, which forms the upper part of the whole implement is fur-
nished with a pin 3, which is made square in its upper part 31, and at this
point carries a pawl or catch 4. The last-named is furnished with two ratchets
or teeth and is lightly pressed downwards by the spring 5.
,
In the boring 2 of the under part 6 of the apparatus, which carries, at its lowest
extremity, the fixing contrivance 7 for the tool, the ratchet-wheel 8 is firmly fixed
by means of a pin. By means of a pin and disc 9, and with the assistance of the
bolt or pin 3 the parts 1 and 6 are held together, so that the spring 5 easily
presses the circular pawl into the ratchet-wheel S. At the same time the upper
part 1 is properly guided in the boring of the under part 6, by means of the
additional piece 11.
The working of the apparatus is thus clear. The particular tool-screw-driver,
boring implement, or the like, is firmly secured in the apparatus at the point 7,
and the handle 1 turned backwards and forwards, being firmly held by the hand.
The firmly secured tool hereby is caused to rotate continuously in either direction
without further trouble, according to the way in which the pawl arrangement is
inserted.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
Tool-holder for boring tools, screw-drivers and the like, the distinguishing
facture of which is that the actual holder which carries the particular tool with

page_text: the assistance of a fixing contrivance, (6) is bored out on its upper side, and in
this boring the handle proper (1) is guided centrally by means of an additional
piece and the pin (3), the circular catch (4) seated on the square shaped part (31)
of the pin (3) engaging, under the action of the spring (5) in the ratchet-wheel (8)
for the purpose of enabling the tool mounted in the upper part to be continuously
rotated in either direction in spite of the to and fro movement of the handle (1),
substantially as shewn and described.
1 1
1111
17000