IMPROVEMENTS IN FLOORING CRAMPS
Year: 1884

page_text: I THOMAS THORNTON of 34 Margaret Street Bury Lancashire Carpenter & Joiner
do hereby declare the nature of my invention for IMPROVEMENTS IN FLOORING
CRAMPS to be as follows:-
1st In shortening the distance between the fulcrum and weight (resistance) by
means of a movable end added to the sliding bar thereby giving greater leverage.
2nd An improved wedge arrangement for releasing the bar.
3rd Improvements in the tongue and in the spring belonging to it.
4th General improvements in the construction of the machine as sett forth fully
in the accompanying drawing and specification.
My invention is shown in the drawing marked (A) Figs 1. 2. 3. 4. 5. 6. In which
D is a sliding bar with a cross head to engage the edge of the boards the underside
of the bar is grooved as shewn in section Fig 3, and into this groove fits a tongue I,
working from a centre and as this tongue is at an angle with the bar, the bar will
only move in one direction.
I move this bar with a lever the fulcrum being the teeth F.
After the boards are cramped up I simply drive in the wedge H which releases
the tongue from contact with the bar and allows it to move freely back to its
former position.
"
The improvements I wish to patent are sett forth in the specification and are
fully shewn in the accompanying drawing marked (A) in which Figs 5. & 6. show
improvements upon Figs 1. 2. 3. 4.
1st I make a movable end or falling piece C. to the sliding bar D which falls
below the end of the bar against an abutinent under the bar and is made of any
width that I may think suitable. My object in this is to get a greater power with
the lever E. because of the shorter distance between the weight (resistance) and
the fulcrum. It also make an intermediate distance between the teeth F. in
moving the bar D.

page_text: 2nd I make a ledge or rim G. on the underside of the wedge H to move in
a corresponding grove in the sides of the box for the purpose of keeping the wedge
when slack free or clear from the tongue I.
3rd I make the tongue I longer which gives it a greater purchase upon the
sliding bar D. A larger and stronger spring K also being inserted.
4th I also improve the general construction of the machine by means of flanges
as shown in the drawings at L. L. for the purpose of giving rigidity to the outer
casing or box part, and by varying the outline in other portions of the design,
I may also make some with the teeth C. raised higher as shewn in dotted lines in
Fig 5 for the purpose of gaining power.

page_text: I THOMAS THORNTON of 34 Margaret Street Bury Lancashire, Carpenter and
Joiner do hereby declare the nature of my invention for IMPROVEMENTS IN
FLOORING CRAMPS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:―
My improvements are shewn in the Drawings Figs 1. 2. 3. 4.
1at I make a movable end or falling piece C. to the sliding bar, D. which falls
below the end of the bar against an abutment under the bar, and is made of any
width that I may think suitable. My object in this is to get a greater power with
the lever E. because of the shorter distance between the weight (resistance) and the
fulcrum. It also makes an intermediate distance between the teeth F. in moving
the bar D.
2nd I make a ledge or rim G. on the underside of the wedge H to move in
a corresponding groove in the sides of the box for the purpose of keeping the
wedge when slack free or clear from the tongue I.
3rd I make the tongue I. longer than before which gives it a greater purchase
upon the sliding bar D. and holds it firmer. A longer and stronger spring K. also
being inserted.
4th I also improve the general construction of the machine by incans of flanges
as shewn in the drawings at L. L. for the purpose of giving rigidity to the outer
casing or box part, and by varying the outline in other portions of the design, and
by arranging the clip M. with a removable pin N. so as to allow of wider clips
being fitted to the machine for varying thicknesses of flooring beams.
I may also in some cases make the teeth F. rising by steps as shown by the
dotted lines in Fig 1.
The fish-tail I may also vary as I find convenient into the shape indicated by
the dotted lines O. O.
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
1st Shortoning the distance between the fulcrum and weight (resistance) by
means of a movable end added to the sliding bar thereby giving greater leverage
substantially as hereinbefore described.
2nd The wedge arrangement for releasing the bar substantially as described.
3rd Greater purchase upon the sliding bar by a longer tongue and stronger spring
substantially as described.
4th The construction of the machine as sett forth fully in the accompanying
Drawings and specification.
Dated this 10th deve of 1004