An Improvement in Spanners, Pipe-wrenches, and similar Tools having Adjustable Jaws.
Year: 1899

page_text: Date of Application, 11th July, 1899
Complete Specification Left, 15th Jan., 1900 -Accepted, 3rd Mar., 1900
PROVISIONAL SPECIFICATION.
An Improvement in Spanners, Pipe-wrenches, and similar Tools
having Adjustable Jaws.
I, WALTER JOSEPH LEES GUEST, of "Braeside," Como Street, Alphington, near
Melbourne, in the Colony of Victoria Clerk, do hereby declare the nature of
this invention to be as follows:-
This invention relates to that class of tools such as spanners and pipe-wrenches
which have adjustable jaws, and its object is to provide a tool of this description
which can be adjusted quickly, and will be more convenient in use than the
ordinary screw operated tools.
According to my invention, I make the body, beam, or base of the tool with
serrations or file-like teeth, which are preferably formed beneath the level of
its upper surface, and I arrange the movable jaw so that it slides along said body
beam or base in the ordinary manner.
Near the upper end, and at the back of the movable jaw is pivotally supported
a lever carrying a pawl, the lower end of which is formed to correspond with the
upper surface of the body, beam or base, and may be serrated on its lower end to
correspond with the serrations or teeth on said body.
The lever is pivotted at the back of the movable jaw, and either encircles or
passes through the pawl so that when said lever is raised the pawl will be lifted
out of engagement with the serrated surface of the body to enable the movable
jaw to be moved backwards or forwards at will.
When said lever is pressed down it causes said pawl to jam against the serrations
along the upper surface of the body and thus secures the movable jaw in position
and at the same time forces said jaw forward slightly so as to provide a positive
grip and also serves as a brace for the upper edge of said jaw, which is thereby
enabled to better withstand the pressure to which it is subjected.
If preferred a curved handle can be used so that pressure can be applied for
operating said pawl from the opposite side of the body or beam, thus giving a
more direct thrust to the pawl.
T .
1000
ABEL & IMRAY,
Agents for the Applicant.
An Improvement in Spanners, Pipe-wrenches, and similar Tools
having Adjustable Jaws.
I, WALTER JOSEPH LEES GUEST, of "Braeside," Como Street, Alphington, near
Melbourne, in the Colony of Victoria Clerk, do hereby declare the nature of
Price Rd1

page_text: 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 relates to that class of tools such as spanners, vices, and pipe-
wrenches which have adjustable jaws, and its object is to provide a tool of this
description which can be adjusted quickly, and will be more convenient in use
than the ordinary screw operated tools.
According to my invention, I make the body, beam, or base of the tool with
serrations or file-like teeth, which are preferably formed beneath the level of its
upper surface, and I arrange the movable jaw so that it slides along said body,
beam or base in the ordinary manner.
Near the upper end, and at the back of the movable jaw is pivotally supported
a lever carrying a pawl, the lower end of which is formed to correspond with the
upper surface of the body, beam or base, and may be serrated on its lower end
to correspond with the serrations or teeth on said body.
In order that my invention may be clearly understood I will describe it by
reference to the accompanying drawings in which,
Figure 1 is a side elevation of an adjustable spanner or screw hammer in
position when about to grip constructed according to this invention, whilst,
Figure 2 is a similar view to Figure 1 showing position of parts when object
is firmly gripped.
:
Figure 3 is a perspective view of a bench vice embodying my improvements.
The same letters of reference indicate the same or corresponding parts in all
the figures.
a represents the body, base or beam of the tool, and b the serrations which are
formed transversely along the upper surface thereof, whilst c represents the
movable jaw which slides along said body and d the lever which is pivoted to the
back of said movable jaw and which carries a pawl e arranged to engage with the
serrations or teeth b on the body a, a spring f being used to normally keep said
pawl in engagement with said serrations or teeth. These latter may be formed
below the level of the upper surface of the body of the tool as illustrated in
Figure 3 in which case they will not be liable to contact with the article which is
being gripped between the jaws.
The lever pivoted at the back of the movable jaw e either encircles the
pawle or passes through it so that when said lever is raised the pawl will be
lifted out of engagement with the serrated surface of the body to enable the
movable jaw to be moved backwards or forwards towards or from the fixed
jaw 9.
:
When the lever d is pressed down it causes the pawl e to jamb against the
serrations along the upper surface of the body and thus secures the movable
jaw in position and at the same time forces said jaw forward slightly so as to
provide a positive grip and also serves as a brace for the upper edge of said
jaw, which is thereby enabled to better withstand the pressure to which it is
subjected.
This positive grip is produced because of the toggle link motion of the lever
and pawl the effect being that these two parts will be more nearly in a straight
line when the lever is forced down and thus the movable jaw will be forced
forward with very considerable pressure.
If preferred a clip h may be arranged to slide along the body and engage with
flanges along the upper edge thereof as illustrated in Figure 3 so that when
moved over the lowest part of the lever the latter can be raised but when
slid towards the highest part of said lever the latter will be locked and the
movable jaw will therefore likewise be locked in position.
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:
A spanner, vice, pipe-wrench or similar tool having adjustable jaws fitted with

page_text: a lever pivotted to the adjustable jaw and carrying a pawl engaging with
serrations or teeth on the upper surface of the body or base of the tool, said
lever and pawl being arranged so as to force said adjustable jaw forward to
provide a positive grip when the lever is depressed substantially as herein described
and explained.
1-13
P
2000