Improvements to Ladders.
Year: 1894

page_text: Date of Application, 24th Oct., 1894
Complete Specification Left, 22nd Nov., 1894-Accepted, 19th Jan., 1895
Date of Application, 24th Oct., 1894
Complete Specification Left, 22nd Nov., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements to Ladders.
JAMES HENRY HEATHMAN 2 Endell Street London, W.C. Ladder Maker do
hereby declare the nature of this invention to be as follows
The attachment to a ladder and its supports of supports to be raised and lowered
by levers, screws, cams or other means so as to move the ladder into perpendicular
line when it is standing upon uneven or unlevel ground.
:
Dated this 23rd day of October 1894.
J. H. HEATHMAN,
Applicant.
JAMES HENRY HEATHMAN 2 Endell Street London W.C. Ladder Maker, 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:
When ladders or steps stand upon irregular ground it is troublesome to block up
the side the ground is lowest in order to get the ladder in an erect position safe for
use, and therefore I have invented the attachment to a ladder of a support or
supports to be raised and lowered as circumstances require for moving the ladder
into a perpendicular line upon unlevel ground.
The accompanying drawings illustrate some of the ways in which the attachment
can be made.
Fig. 1. represents A the ladder side, B a bracket affixed thereto with a screw
boss E through which travels a screwed spindle C. at the end of which is a lump
end or swivel plate D to rest upon the ground so that by screwing down spindle
when D presses upon the ground the ladder side A must rise.
Fig. 2. F is a lever which when raised depresses the spindle G which can be
held in position by pushing a pin through either of the holes H.
Fig. 3 shews a lever M pivoted at O upon the arm of a bracket attached to the
ladder and attached to a cam L, so that by depressing the lever the cam turns and
carries the spindle J through the brackets K affixed on the ladder and a pin can be
put into either of the holes N as they come opposite the hole in spindle J so as to
hold secure at the height desired.
The spindle may also be operated by means of a rack & pinion or a worm gear;
while for small ladders or steps Figures 4. 5. 6. 7 & 8 shew methods of attaching
the supports-in each case A representing either the side of the ladder or its
supporting leg.
Fig. 4 is a sliding grooved stick secured by jamb nuts upon bolts through the
ladder & the grooved stick.
Fig. 5 is a stick sliding through sockets and having holes through which a pin
can be placed, or holes can be made in A & the pin put in either through or above
the stick.

page_text: Fig. 6 shews a stick held by a screw cramp affixed to one of the sockets through
which it slides.
Fig. 7 is a bolt sliding in a socket and having several slots for the arm of the
bolt to pass in-and even an ordinary bolt can in some instances be applied for the
purpose my invention effects.
Fig. 8 is a screw spindle to be fixed either direct into A or into a block or angle
plate to be fixed on to A.
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.
The attachment to a ladder, and its supports of supports to be raised and lowered
by levers, screws, cams, or other means so as to move the ladder into perpendicular
line when it is standing upon unlevel ground.
Dated this 19th day of November 1894.
J. H. HEATHMAN,
Applicant.