Year: 1886

page_text: Date of Application, 24th July, 1886.
Complete Left, 22nd Apr., 1887.
Complete Accepted, 24th May, 1887.
We JOSEPH BLAIBERG and JOSEPH MARSON both of Bute Works Oozells Street
North, Birmingham in the County of Warwick Engineers and Tool Makers and
BENJAMIN SHAW ROBERTS the younger of No. 2 Highfield Terrace Brookfield Road
Birmingham aforesaid Machine Fitter do hereby declare the nature of this Invention
to be as follows:-
+
Our said Invention consists of a drill stock the parts of which are constructed and
combined in the manner hereinafter described by which construction and arrangement
of parts the pawl and ratchet ordinarily employed are dispensed with and a smooth
and certain action obtained.
The tool holder is of the ordinary kind and is provided with the usual centre. The
said tool holder works in the socket attached to the arm of the stock and the
reciprocating motion of the said arm is made to communicate an intermittent rotary
motion to the tool holder in the following manner.
In the interior of the socket and preferably at that part where it joins the handle-
we form a recess eccentric to the cylindrical surface of the interior of the socket.
The space between this recess and the cylindrical surface of the tool holder is of a
curved wedge like figure. In this recess and parallel to the axis of the tool holder is
a cylindrical roller of a diameter somewhat less than the breadth of the tapering recess
in which it is situated. A light spring presses this roller towards the narrow end of
the recess.
The action of the parts is as follows. When the handle is turned in the direction
which causes the broad end of the recess to advance towards the roller no motion is
communicated to the tool holder but when the handle is turned in the other direction
the narrow end of the recess advancing on the roller the said roller is gripped and
wedged tightly between the eccentric surface of the socket and the cylindrical surface
of the tool holder and the handle in its motion gives a like motion to the tool holder.
Thus by giving a reciprocating motion to the handle of the drill stock an intermittent
rotary motion in one direction is given to the tool holder and the drill or tool fixed
in it.
The spindle or tool holder the roller and the socket in which the tool holder works
are made of hardened steel.

page_text: We JOSEPH BLAIBERG and JOSEPH MARSON both of Bute Works Oozells Street
North Birmingham in the County of Warwick Engineers and Tool Makers and
BENJAMIN SHAW ROBERTS the younger of No. 2 Highfield Terrace Brookfield Road
Birmingham aforesaid Machine Fitter do hereby declare the nature of our Invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
Our said invention consists of a drill stock the parts of which are constructed and
combined in the manner hereinafter described by which construction and arrangement
of parts the pawl and ratchet ordinarily employed are dispensed with and a smooth
and certain action obtained.
The tool holder is of the ordinary kind and is provided with the usual centre. The
said tool holder works in the socket attached to the arm of the stock and the
reciprocating motion of the said arm is made to communicate an intermittent rotary
motion to the tool holder in the following manner.
In the interior of the socket and preferably at that part where it joins the handle
we form a recess eccentric to the cylindrical surface of the interior of the socket. The
space between this recess and the cylindrical surface of the tool holder is of a curved
wedge like figure. In this recess and parallel to the axis of the tool holder is a
cylindrical roller of a diameter somewhat less than the breadth of the tapering recess
in which it is situated. A light spring presses this roller towards the narrow end of
the recess.
The action of the parts is as follows:-When the handle is turned in the direction
which causes the broad end of the recess to advance towards the roller no motion is
communicated to the tool holder but when the handle is turned in the other direction
the narrow end of the recess advancing on the roller the said roller is gripped and
wedged tightly between the eccentric surface of the socket and the cylindrical surface
of the tool holder and the handle in its motion gives a like motion to the tool holder.
Thus by giving a reciprocating motion to the handle of the drill stock an intermittent
rotary motion in one direction is given to the tool holder and the drill or tool fixed
in it.
Figure 1 of the accompanying Drawing represents in side elevation partly in
vertical section a drill stock constructed according to our invention and Figure 2 is a
horizontal section partly in plan of the same Figure 3 represents in vertical section a
portion of the drill stock taken in a plane at right angles to that in which the sectional
part of Figure 1 is taken.
The same letters of reference indicate the same parts.
a is the tool holder and the spindle of the saine is the ordinary centre d is the
arm of the drill stock by the reciprocating motion of which an intermittent rotary
motion is communicated to the fool holder a;e is the socket of the reciprocating

page_text: arm d through which socket the spindle of the tool holder a passes as represented in
Figure 1. The said socket e of the arm d works between the shoulder a² of the tool
holder a and the detachable collar ffixed to the spindle bg is the eccentric recess in
the interior of the socket e of the reciprocating arm d the shape of the said recess
being best seen in Figure 2. By an examination of the said Figure 2 it will be seen
that the space between the said recess 9 and the cylindrical surface of the spindle 6 of
the tool holder a is of a curved wedge like figure.
In the said recess y is a cylindrical roller the said roller being situated parallel to
the spindle of the tool holder (see Figure 1). It will be seen by an examination of
the Drawing that the diameter of the cylindrical roller is somewhat less than the.
breadth of the broadest part of the tapering recess g in which it is situated. By means
of a light bow spring i best seen in Figure 3 the cylindrical roller his pressed towards
the narrow end of the recess g.
When the arm d is moved in the direction of the arrow shown in Figure 2 the
broad end of the recess g advances upon the roller and no motion is imparted to the
spindle of the tool holder a. When however the arm d is turned in a direction
contrary to that indicated by the arrow in Figure 2 the narrow end of the recess g
advances on the roller and the said roller is gripped and wedged tightly between the
eccentric surface of the recess in the socket e and the cylindrical surface of the
spindle b of the tool holder a. The arm d is thereby bound tightly to the spindle 6 of
the tool holder and the motion given to the said arm in a direction contrary to that
indicated by the arrow is communicated to the tool holder a. In this way by the
reciprocating motion of the handle d of the drill stock an intermittent rotary motion
in one direction is communicated to the tool holder and to the tool or drill fixed in it.
The tool holder and spindle a, b the roller and the socket e in which the spindle of
the tool holder works are made of hardened steel.
Having now particularly described and ascertained the nature of our invention
and the manner in which the same is to be performed we declare that we claim as our
invention.
A new or improved drill stock consisting of the socket e containing a curved
wedge like recess g a cylindrical roller and tool holder and spindle ab the said
parts being made of hardened steel the roller being urged towards the narrow
end of the recess g by a hardened and tempered steel spring i the several parts being
constructed and operating substantially as hereinbefore described and illustrated in the
accompanying Drawing.
Dated this Twentieth day of April 1887