Improvements in Screw Jacks and like Appliances.
Year: 1895

page_text: Date of Application, 27th Feb., 1895
Complete Specification Left, 23rd Nov., 1895-Accepted, 28th Dec., 1895
ALTUALUN 1ט ע.U01U
Improvements in Screw Jacks and like Appliances.
We. HARRY WILLIAM YOUNG and DAVID THOMAS YOUNG, of Ryland
Street Works in the City of Birmingham, Engineers, do hereby declare the
nature of this invention to be as follows:-
This invention relates to screw jacks and like appliances having a screw operated
with a ratchet lever.
The object of my invention is to provide a safe and ready means of reversing or
withdrawing the ends of the pawl from the recesses or teeth upon the ratchet wheel
or head end of the jack or like screw.
In carrying our invention into effect we construct the screw jack or other
appliance in the usual manner, providing it with the ordinary fittings and with the
serrated or ratchet ring in the required position for receiving the lever and pawl
box or ratchet handle which we attach to the screw or ram.
We make our lever and ratchet handle which covers the pawl in any well known
manner varying the shape and configuration of its outer end to suit the particular
bar rod or spanner which may be employed for obtaining the desired leverage.
We attach the pawl with its opposite shaped ends to the stock of the ratchet
lever head or handle in a peculiar manner by providing a piu, stud, or fulcrum
upon which we mount or secure the pawl. The pawl and pin may be turned
together or as a whole within the bearings formed in the jaws or box part of the
head; and thus although the pin does not permit the pawl to turn upon it the pin
itself cannot turn or move without turning round, or reversing the pawl. We
accomplish this by making the hole within the pawl square, rectangular or other
than round, or we provide a key or keyway therein to cause the pawl to be secured
to a round or other pin. The holes within the sides or jaws of the ratchet or
spanner head or handle we make circular and we provide a head or heads upon
the outer extremity or extremities to enable a spanner or key to be placed
thereon when it is desired to turn move, or reverse the spindle or pin for withdrawing
the pawl or for putting the pawl in position one side or the other between the
ratchet wheel teeth.
We make our manipulating lever with a spanner, or jaw or box suitable for
turning the pin when in position, and when desired we place a lock nut or pin
upon the projecting end or ends of our pawl pin to prevent iis accidental
removal.
We employ the ordinary spring and tumbler or bolt and the usual frames or
handles for our screws, or rams, modifying the shape of the central part of
our pin and the form of the manipulating projecting head to suit any particular
requirement.
Deted this 26th dor of Februar 1895
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.

page_text: We, HARRY WILLIAM YOUNG, and DAVID THOMAS YOUNG, of Ryland
Street Works, in the City of Birmingham, Engineers, 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 screw jacks and like appliances having a screw operated
with a ratchet lever.
The object of our invention is to provide a safe and ready means of reversing or
withdrawing the ends of the pawl from the recesses or teeth upon the ratchet
wheel or head end of the jack or like screw.
In the accompanying sheet of explanatory drawings Figure 1 is a front elevation,
and Figure 2 a sectional plan of our improved ratchet appliance when attached to
a screw jack ratchet.
In carrying our invention into effect we construct the screw or jack or other
appliance in the usual manner, providing it with the ordinary fittings, and with
the serrated or ratchet ring A and the lever B, inserted at opposite ends of the
pawl box or ratchet handle C, which we attach to the screw or ram.
We make our lever and ratchet handle which covers the pawl D in any well-
known manner varying the shape and configuration of its outer end c¹ to suit the
particular bar, rod, or spanuer, B, which may be employed for obtaining the
desired leverage.
We attach the pawl D with its opposite shaped ends dd' to the stock of the
ratchet lever head or handle C in a peculiar manner by providing a pin, stud, or
fulcrum E upon which we mount or secure the pawl D. The pawl and pin may be
turned together or as a whole within the bearings c² ³ formed in the jaws or the
box part of the head C, and thus although the pin E does not permit the pawl to
turn upon it, the pin itself cannot turn or move without turning round, or reversing
the pawl. We accomplish this by making the hole d' within the pawl D square,
rectangular or other than round, or we provide a key or keyway therein to cause
the pawl to be secured to a round or other pin. The holes within the sides or
jaws of the ratchet or spanner head or handle C we make circular and we provide
a head E or heads upon the outer extremity or extremities of the pin E to
enable a spanner or key to be placed thereon when it is desired to turn, move or
reverse the spindle or pin for withdrawing the pawl or for putting the pawl in
position one side or the other between the ratchet wheel teeth.
We make our manipulating lever B with a spanner, or jaw or box suitable for
turning the pin head E' when in position, and when desired we place a lock nut or
pin e upon the projecting end or ends of our pawl pin to prevent its accidental
removal.
We employ the ordinary spring F and tumbler or bolt H for acting on the pawl
back, and the usual frames or handles for our screws, or rams, modifying the shape
of the central part of our pin and the form of the manipulating projecting head to
suit any particular requirement.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is.―
1. In a screw jack ratchet pawl making and arranging the pin or pivot with
circular ends for bearing in the head socket or handle, while the central part is of
such a shape as will cause the pawl to move when the pin is moved in its bearings
substantially as and for the purposes herein before described, and as illustrated in
the accompanying drawings.

page_text: 2. In a screw jack or like ratchet paw!, the use of a pin or pivot which is free to
turn in its bearings, but upon which the pawl is fixed and unable to turn, and
having a projecting head or end for permitting the pawl to be moved so as to alter
its position on the ratchet by the pin being turned, substantially as herein before
described.
3. The improvement in fittings and appliances for screw jacks and for like
purposes, substantially as hereinbefore described, and as illustrated in the
accompanying drawings.
Dated this 22nd day of November 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.