Improvements in and relating to Combined Adjustable Nut and Drill Wrench.
Year: 1893

page_text: te of Application, 25th July, 1893-Accepted, 2nd Sept., 1893
COMPLETE SPECIFICATION.
Improvements in and relating to Combined Adjustable Nut and
Drill Wrench.
We CHARLES HERMANN BERNHEIM and BAXTER SHEMWELL, citizens of the
United States of America, residing respectively at Conover, in the County of
Catawba, and Lexington, in the County of Davidson, both in the State of North
Carolina, one of the United States of America, Gentlemen, do hereby declare the
nature of this invention, and in what nanner the same is to be performed, to
be particularly described and ascertained in and by the following statement :—
Our invention relates to that class of ratchet wrenches provided with adjustable
jaws adapting it for use with different sized nuts.
The invention consists in the combination with the head provided with the pawl
and ratchet disc and with the annular rim or flange, and with longitudinal grooves
with spring arms mounted in the grooves, said arms provided with clamping jaws,
and a ring adjustable on the head, and a socket in the head to receive the shank of
a drill or bit, all as hereinafter described.
In the accompanying drawings-
Figure 1 is a side elevation of the improved device showing the nut jaws closed.
Figure 2 is a vertical section showing the nut jaws closed in full lines, and
showing the same in dotted lines to receive a larger nut, and also showing the drill
or bit socket.
Figure 3 is a longitudinal section through the handle, showing the double pawl
with the spring locking dog for holding it engaged with the ratchet.
Figure 4 is a section on the line y-y Figure 1, and
Figure 5 is a section on the line - Figure 2.
A represents a head having formed thereon or connected thereto about centrally
of its length the ratchet disc B, and the portion of the head above the ratchet disc
to which the handle is connected is provided with a circumferential groove b, with
which a screw & connected with the sleeve of the head or handle B' engages so as
to hold the handle end wise relative to the head, while permitting the head to be
rotated relatively to the handle.
The lower portion of the head is provided with an annular rim or flange B³, and
said portion is provided with grooves C, extending from the lower edge of ratchet
disc to and through the flange. These grooves are preferably made tapering or
inclining inward from the flange toward the disc, and in said grooves are mounted
spring arms D connected with the head at their upper ends by means of screws or
bolts, d.
The spring arms D have formed integral therewith at their lower ends angular
clamping jaws, E, for engaging the side faces of a nut.
Surrounding the head is a ring F, having its inner face made in tapering form,
which engages the spring arms D to clamp the jaws against the nut.
The lower portion of the head is provided with a socket G made in form to
receive the shank of a bit or drill, that is, provided with angular sides tapering
from the mouth toward the closed or inner end and made of such size and length as
to receive the shank of varying sized drills or bits.
A set-screw G¹ passes through the head to engage the shank to hold it in the
socket.
The head or handle may be of any desired form, either to grip with the hand, or
in the form of a breast plate, or a different form of handle may be used to best
adapt the device to the kind of work to be done.
The handle H for rotating the head is connected to said head by means of a
leeve or collar H', and the handle is provided with a socket to receive a spring h,

page_text: Mounted on the collar is the double pawl I, which is provided with an arm I', with
which the spring h engages, and which spring acts to hold the pawl engaged with
the ratchet when thrown to either side and lock the handle engaged with the head
and to be rotated thereby.
When the parts are in position represented by the full lines, Figures 1 and 2, the
spring arms will grip a small nut, and the ring F will act to hold the jaws firmly
engaged therewith, and when it is desired to grip a nut of larger size, the ring can
be pushed up on the head to allow the arms to be spread apart sufficiently to take
such larger nut, the ring being forced down a sufficient distance to hold the jaws
engaged with said nut.
By forming the flange B2 on the head it will be seen that the strain is brought
against the side wall thereof in such manner as to relieve the spring arms from side
strain or twisting action.
By the combination as above described it will be seen that a combined adjustable
nut and drill ratchet wrench is provided, and at a reasonable cost, and permits its
use in places not readily accessible with the ordinary form of nut wrench.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
The combination with the head, of the pawl and ratchet disc, the head provided
with the annular rim and with the longitudinal grooves, the spring arms mounted in
the grooves, the angular nut clamping jaws, on the spring arms, a ring adjustable
on the head to hold the jaws engaged with a nut, and a socket in the head to
receive the shank of a drill or bit, substantially as and for the purpose set forth.
Dated this 25th day of July 1893
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.