Improvements in Ladders to Extend or Convert into Trestles.
Year: 1890

page_text: Date of Application, 8th Oct., 1890
Complete Specification Left, 28th Oct., 1890-Accepted, 13th Dec.; 1890
PROVISIONAL SPECIFICATION.
Improvements in Ladders to Extend or Convert into Trestles.
JAMES HENRY HEATHMAN 2 Endell Street London W.C. Fire Engineer & Ladder
Maker do hereby declare the nature of this invention to be as follows:-
Two or more ladders are arranged to reach varying heights and detach or form
trestles to suit differing requirements. The main ladder is made tapering to a wide
base and parallel grooved strips are fixed down behind the rungs; tongue pieces aro
fixed to the lower part of the sliding ladder to travel in the grooved strips on the main
ladder. The main ladder is fitted with a rocking lever which supports the sliding ladder
when extended, such lever being actuated by a circuitous cord through pulleys with
or without springs,
A rope & pulley is provided to raise & lower the slide ladder.
A pair of horns are fixed to the main ladder & carry a bolt which serves to guide &
hold in position the sliding ladder or the bolt can be withdrawn & passed through
the horns and holes in the slide ladder to form a hinge upon which such sliding
ladder may open out to support the main ladder and therewith form trestles.
More than one sliding ladder can be employed.
.:.נ
1
1000
COMPLETE SPECIFICATION.
Improvements in Ladders to Extend or Convert into Trestles.
JAMES HENRY HEATHMAN 2 Endell Street London W.C. Fire Engineer & 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:-
Two or more ladders are arranged to reach varying heights and detach or form
trestles to suit different requirements. See accompanying drawings.
The main ladder "A" is made tapering to a wide base and parallel grooved
strips "C" are fixed down the rungs. Tongue pieces "D" are fixed to the lower
part of the sliding ladder "B" to travel in the grooved strips "C" on the main
Jadder "A."
The main ladder A is fitted with a rocking lever "F" which supports the sliding
ladder "B" when extended such lever being actuated by a circuitous
cord "H" travelling on a pulley "J," and a rubber spring "G" automatically pulis
the lock into work & holds it under the rungs of the sliding ladder.
A rope "L" & pulley "K" is provided to raise & lower the slide ladder "B."
A pair of horns "E" are fixed to the main ladder "A" and carry a holt also
marked "E" which serves to guide & hold in position the sliding ladder "B," or the
bolt can be withdrawn and passed through the horns & holes in the slide ladder as
shewn in Figure "4" to form the hinge upon which such sliding ladder may open out
to support the main ladder & therewith form trestles.
When more than one sliding ladder is to be employed the main ladder and sliding
ladder shewn in the drawings would be made of greater width so that the extra
sliding ladder can be placed between the sides of sliding ladder B and grooves
would be ploughed out inside the sides of ladder "B" to receive tongue pieces
like "D" fixed on the lower part of the extra sliding ladder. The lock with its
connections and the raising rope & pulley shewn on Figures 1. 2. 3 & 4 and
lettered "F. G. H. J. K. L" being duplicated upon ladder B.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is
1. The application of grooved strips in conjunction with tongue pieces to travel
therein for guiding & holding in position one ladder which slides over or from another
ladder as shewn in Figure 5 of accompanying drawings.
2. The combination of means for raising arresting and lowering one or more
ladders which slide over or form another ladder, with means for guiding the sliding
ladder or ladders and means to enable a sliding ladder to be utilised as a support for
the main ladder to form trestles, all as herein described and shewn in the accompanying
drawings Figs. 1. 2. 3. 4 & 5.
Dated this 95th day of Ontahan 1800
J. H. HEATHMAN,
Applicant.