Improvements in or connected with Ladders, Tressels, or the like.
Year: 1898

page_text: Date of Application, 7th Mar., 1898
'
"
1000
ALL
1000
PROVISIONAL SPECIFICATION.
Improvements in or connected with Ladders, Tressels, or the like.
We, CHARLES ARTHUR DAY, of Mill Street, Macclesfield, in the County of
Chester, Ironmonger, and THOMAS BURGESS, LUKE HAROLD RENSHAW, and JOHN
JOSEPH BURGESS, trading as Renshaw, Burgess & Co. of Congleton, in the said
County, Engineers and Machinists, do hereby declare the nature of this invention
to be as follows:
This invention relates to step ladders, builders' ladders, fire ladders, shop steps,
tressels for scaffolding and the like and is designed to provide for the adjustment
of the same upon uneven ground.
It comprises a sliding bar to be attached to the leg or support of the ladder
capable of being moved to and fro and securely held in position when set or
adjusted by means of a rack or equivalent device.
In carrying out the invention we construct a bracket to be affixed to the leg of
the ladder or other article in which the sliding bar is placed and which acts as
a guide and support therefor.
In one construction the sliding bar is provided with a rack or worm teeth and
to the bracket is secured a worm which gears therewith. The worm is mounted
upon a spindle to which it is keyed or secured and the spindle is provided with a
knob or handle by which it can be rotated. By rotating the worm in one
direction or the other the sliding bar is moved either up or down.
In another arrangement the sliding bar is provided with a rack or ratchet teeth and
a pawl or equivalent is pivoted to the bracket to engage therewith and prevent
movement. The pawl is provided with an eccentric or other projection with which
a pivoted strap, catch or the like also on the bracket engages and holds it firmly
in contact with the teeth or rack on the face of the sliding bar.
The lower ends of the sliding bar may be shod with rubber pads, metal or other
material according to the description of article to which the invention is to be
applied.
'ד
1
Maal 1908
Improvements in or connected with Ladders, Tressels, or the like.
We, CHARLES ARTHUR DAY, of Mill Street, Macclesfield, in the County of
Chester, Ironmonger, and THOMAS BURGESS, LUKE HAROLD RENSHAW, and Joun
[Price 8d.1

page_text: JOSEPH BURGESS, trading as Renshaw, Burgess & Co., of Congleton, in the said
County, Engineers and Machinists, 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 relates to step ladders, builders' ladders, fire ladders, shop steps,
tressels for scaffolding and the like.
It is designed to provide an improved appliance for the adjustment of the feet
of such articles upon uneven ground which can be quickly and easily manipu-
lated and set and which will not be liable to movement when in use.
It is well known that the feet of ladders have been adjusted by means of screws
passed through a bracket or by a sliding bolt of ordinary construction but such
are not considered satisfactory appliances for the purpose being either too slow
of adjustment or unreliable.
Our invention consists of a sliding bar fitted in a suitable guide bracket provided
with a rack c or its equivalent with which gears a worm mounted upon the bracket
and by the rotation of which the sliding-bar is moved up or down as required.
The invention will be fully described with reference to the accompanying
drawings;
Fig. 1. Front elevation of the appliance on the side of a ladder leg.
Fig. 2. Side elevation in section of same.
Fig. 3. Transverse section on line -y Fig. 1.
Fig. 4. Front elevation of sliding bar removed from the guide bracket.
To the leg A of the ladder we affix a guide bracket B constructed to act as a
guide and support for a sliding bar C the bar C fitting into the groove 6 between
the guides b formed to receive it.
The sliding bar C is constructed with a rack or worm teeth on its face (or side)
of suitable shape and pitch to engage with a worm D.
The worm D is mounted on a spindle or pin E fitted to the affixed supporting
bracket B and is free to rotate thereon in either direction. The worm 1) may be
rotated in either direction by passing the hand over the face of it or if preferred
a knob or handle may be provided for operating it. By rotating the worm D in
one direction or the other the sliding bar C is moved either up or down as required
and when the worm is at rest sliding movement of the bar C is prevented by the
teeth of the rack e resting against the worm.
In a modified arrangement the sliding bar is provided with ratchet or other teeth
instead of worm teeth and a pawl is pivoted to the bracket B instead of the worm
to engage with the teeth to prevent movement. The pawl is held in engagement
with the teeth to prevent movement by a pivoted eccentric stop catch or the like
also on the bracket B which engages with it and holds it firmly in contact with
the teeth or rack on the face of the sliding bag.
The lower ends of the sliding bar may be shod with pivoted pads F of metal,
rubber or other material according to the description of article to which the inven-
tion is to be applied.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed it is to be understood that
a sliding adjustable bar per se is not claimed as the invention but that what we
claim is:
1. An appliance for adjusting the feet of ladders step-ladders, tressels and similar
articles to uneven or unlevel ground comprising a sliding bar fitted into a suitable
guide and supporting bracket constructed with a rack or teeth on the face and
a worm mounted on the bracket gearing therewith by which the bar is moved up
and down substantially as described.
2. An appliance for adjusting the feet of ladders, step-ladders, tressels, and
similar articles comprising a sliding bar fitted into a guide and supporting bracket
constructed with a rack or teeth on the face or side a pawl pivoted to

page_text: the bracket to engage the teeth and an eccentric or other device to hold the pawl
in contact with the teeth by which the sliding bar is held stationary substantially
as described.
3. An appliance for adjusting the feet of ladders, step-ladders, tressels and
similar articles having the several parts constructed and arranged in combination
substantially as described and shown.
Dated this 5th day of December 1898
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.