Year: 1897

page_text: I, CHARLES HENRY SLATER, Carlton Husthwaite, Thirsk, Yorkshire, Joiner and
Wheelwright, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in lifting jacks and more especially to those
employed in raising carriages. My improved jack consists essentially of a suitable
stand or base to which are attached the lower ends of two upright standards, the
Darrower dimensions of which face one another leaving a space between them. The
upper ends of the standards are connected by a cheek on each side, these cheeks
being prolonged somewhat at one end, so as to project beyond one of the standards.
In the space between the standards and running between these upper cheeks, is a
rack of less width than the space between the standards, the rack having downwardly
tending teeth. The bottom of the rack is kept in place by a shoe grooved so as to
permit the rack to be run freely up and down the standards. Between the projecting
ends of the upper cheeks is pivotted the upper end of a short hanging lever, the
lower end of which is pivotted between the forked end of a handle of considerable
length, the forked end of the handle having between it that one of the two standards
which is the nearer to the teeth of the rack. The forked end reaches to within
the space between the standards and has across its extreme end a pin which can
by moving the handle up and down be successively brought under each tooth in
the rack and so raise it, to the required height. A catch between the upper
cheeks is kept in contact with the rack (so as to retain it as it rises) by a spring,
and a link connected to it has one end of a cord or chain attached to it, the other end
of the cord or the like being attached to the handle already mentioned. Assuming
the rack to be run down to its lowest position, it can be raised gradually by causing
the pin of the forked handle to pass under each tooth of the rack in succession, this
being brought about by moving the handle up and down as already explained, and
the rack being kept in its successively higher position by the catch already men-
tioned. When it is required to lower the rack, the pin at the end of the forked
handle is disengaged from the rack and the catch withdrawn by pulling the cord or
chain. A cheek is provided at each side of the lower end of the rack and runs up
and down with it. These cheeks are prolonged beyond the second standard and have
between the prolonged ends a hanging shaped clutch, held by a winged headed
nut.

page_text: I, CHARLES HENRY SLATER, Carlton Husthwaite, Thirsk, Yorkshire, Joiner &
Wheelwright, 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 improvements in lifting jacks and more especially in those
used to raise carriages. My improved jack consists essentially of a suitable stand or
base a, as shown in the accompanying drawing which is a part sectional side view, to
which base are attached the lower ends of two upright standards and a third
standard c, the narrower dimensions of which face one another and leave a space d
between them. The upper ends of b and c are connected by a cheek e on each side,
these cheeks & being prolonged somewhat at one end so as to project beyond one of
the standards as at f. In the space d and running between 8 is a rack g of less
width than d, the rack having downward tending teeth h. The bottom of g is kept
in place by a shoe i forked to slide ou c and permitting g to run freely up and down
between band c. Between the projecting ends of eis pivotted the upper end of a
comparatively short hanging lever or link j, the lower end of which is pivotted
between the forked end k of a handle between the fork & being the standard c.
The forked eud k reaches to within d and has across its end a pin m which by moving
the handle up and down can be successively brought under each of the teeth h of the
rack g and so raise it to the required height. A catch n between the cheeks e is kept
in contact with some one of the teeth by a spring o aud a link p connected to n
has one end of a cord or chain g attached to it, the other end of q being attached to l.
A projection rat right angles to the end of g passes between the standards 6 and
carries the pillar 8 which is slotted to slide on and can be kept in place by a set
The extreme end of is made narrower than the rest of it. The pillar s
carries the smaller pillar u which can be slid up and down and kept in place by the
thumb set screw v. The caps w, w' are for putting under the part which is to be
raised. The rack g, pillars and end r¹ enable the jack to be used for moving articles
of various heights.
screw t.
The action of the apparatus is as follows:-Assuming the rack g to be run down
to its lowest position it can be gradually raised by causing the pin m of the fork k to
come in succession under each tooth of the rack g, this being brought about by
moving the handle up and down, the catch n keeping the rack in position as it
rises. When it is required to lower g, the pin m is retired from the tooth it happens
to be in and the catch a pulled back clear of g by drawing the cord or chain.
It is proposed to make the jack principally of metal.
I do not restrict myself to the precise dimensions, relative proportions or
disposition of parts as shown in the drawing as some variation is possible without
departure from the essential features of my invention.
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 :-
1. Lifting jacks each having as its essential features a rack with downward tending
teeth, the said rack being free to slide up and down between standards supported on
a suitable base, the upward movement of the rack being brought about by the
successive application to the teeth of the rack of a pin crossing the gapped end
of a handle which pivotted to one end of a link, the other end of which
is pivotted to a projection at the top of the standards, a catch being provided

page_text: to retain the rack as it rises and provision being made to adapt the jack for
raising artioles of various heights by a projection at fight angles to the rack and
having horizontally slidable thereon a pillar carrying a smaller and vertically slidable
pillar, the whole substantially as described in the above specification and exemplified
in the accompanying drawings.
2. Lifting jacks constructed operated and operating substantially as described in
the above specification and exemplified in the accompanying drawing.
Dated this 3rd day of Tule 1800
HUGHES & YOUNG,
23, Coleman Street, E.C., Agents.