Year: 1898

page_text: Date of Application, 25th June, 1898
Complete Specification Left, 16th Mar., 1899-Accepted, 17th June, 1899
I, JAMES THOMAS ADSHEAD, Cabinet Maker, &c., of Stoneyfield Saw Mill,
Ambrose Street, Rochdale. in the County of Yorkshire, do hereby declare the
nature of this invention to be as follows:-
My invention relates to improvements in step ladders, which consists of a
metallic apparatus as a substitute for the ordinary ropes.
I construct on one of the wood steps of the ladder in the centre an iron bracket
bolted thereto, to the said bracket I pivot a long metal curved slide with a
spring and head. The slide has a long slot with a returned end in the head.
The slot engages with a pin mounted on a bracket fixed to the back rail cross bar
of hinged strut.
When the steps are opened ready for use, the curved slide lifts with the bottom
back rail cross bar, the spring presses the slot in the head of slide down on the
pin mounted on the bracket fixed on the back rail cross bar of the hinged strut
and the steps thus become firm.
The invention is a slide affixed between the front and back parts of a ladder
of four, five, six, or seven steps, which when opened locks itself and makes the
ladder secure.
J. P. BAYLY,
18, Fulham Place, Paddington, London, W.,
Agent for the Applicant.
I, JAMES THOMAS ADSHEAD, of Stoneyfield Sawmill, Ambrose Street, Rochdale,
in the County of Lancaster, Cabinet 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:-
My invention relates to an improvement in step ladders with the object of
dispensing with the ordinary rope or cord that is usually employed for limiting
the distance that the back stay or strut may be opened, also enabling said stay
to be set at a greater or less angle and to be secured in the required position
automatically. In the accompanying drawing Fig. 1 represents a side view of
a step ladder with my invention applied set open to the full extent. Fig. 2
shows the same step ladder closed. Fig. 3 is a side view of the quadrant fastener,
Pi Q71

page_text: constituting my invention, as applied to the aforesaid step ladder, drawn to an
enlarged scale. In these views similar letters refer to similar parts I affix to
the centre of one of the steps a of the ladder a metallic bracket as 6 and pivot
thereto a curved slide or quadrant c with a slot c¹ formed therein, and a returned
head at the opposite end of the quadrant. The aforesaid returned head
engages with a pin d formed on a bracket d which is secured to the back rail
cross bar of the hinged strut e. When the steps are opened for use, the pin
that is attached to the bracket d passes along the groove c¹ in the curved slide c
and enters the returned head ca herein before named where it locks itself by the
formation of said head, and may be further secured if desired either by a spring
or a wing nut. In some cases I form the quadrant c with one or more curved
projections such as at intervals along the slide as shown in dotted lines in
Fig. 3 and within the slot c¹, either of which may engage if required with the
aforesaid pin so as to retain the strut e partially open.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what I
claim is:.
-
1st. In step ladders the use of a curved slide or quadrant with a slot formed
therein and a returned head as in said quadrant which is secured by a hinge
to the back portion of one of the steps of the ladder, in combination with a stud
or pin fastened to the cross bar of a hinged strut as e in the manner and for the
purpose substantially as herein before described.
2nd. In step ladders the use of a quadrant fastener constructed and applied in
the manner and for the purpose substantially as herein before described.
Dated this 10th day of March 1899.
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester,
Agent for the Applicant.