IMPROVEMENTS IN FLUSH SASH LIFTS AND IN THE MODE OF MANUFACTURING THE SAME
Year: 1885

page_text: Manufacturing the same.
I WALTER JOHN MAY of the firm of May and Padmore of 123 Leopold Street
Birmingham in the County of Warwick Brass Founders do hereby declare the
nature of the said invention for "IMPROVEMENTS IN FLUSH SASH LIFTS AND IN
THE MODE OF MANUFACTURING THE SAME" and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement to be as follows that is to say :-
My invention has for its object improvements in flush sash lifts and in the mode
of manufacturing the same in such a manner as to be generally superior in finish
and equality of metal as compared with the cast ones.
In order that my invention may be better understood and more easily carried
into practice I have appended hereunto a sheet of drawings upon which I have
illustrated the mode of manufacture of the two parts constituting my improvements.
Figure 1. is a plan of a rolled brass or other sheet metal plate K with the centre
cut out at its centre by a suitable stamp or machine somewhat like the shape
shown by C.
Figure 2. is a longitudinal section of the same plate in line D. E.
Figure 3. is a plan of the same plate with the edges c¹, c³, c³, and c, turned
down to about right angles with the surface thereof leaving a slightly rounded
edge c, c, c, and c³, This plate is also provided with suitable countersunk screw
holes ff, f, and f³.
Figure 4. is a longitudinal section through Figure 3. on a centre line similar to
that of Figures 1 and 2.
Figure 5. is a plan of another rolled brass or other sheet metal plate H. which is
raised or otherwise dished down at M. The holes n, n¹, n³, and n³ are so punched
through the flanges that a burr n' and n³ is made to project upwards from the
flanges as more distinctly seen at
Figure 6. which is a longitudinal sectional elevation of Figure 5.
Figure 7. is a plan of the completed article.
Figure 8. is a longitudinal sectional elevation of Figure .7.
Figure 9. is a cross sectional elevation of Figure 7.
In completing a flush sash lift I take a front plate K completed as shown by
Figures 3 and 4 and a back plate H also completed as shown by Figures 5 and 6.

page_text: and place them together when the burrs raised from the holes n, n¹, n³, and n³,
enter, the small or under side of the countersunk holes f, f¹, f, and ƒ³ of the
centre plate K. The two parts H and K are now securely locked together by
turning the burred edges of the holes of H. over the enlarged part of the holes
in the outer plate K. forming the two for all practical purposes into one flush
sash lift.
It will be noticed that the edges c¹ and c³ form slight horizontal projections in
the recess just at the part where the points of the fingures would come in lifting
a sash and thus prevent the fingures from slipping out which is an advantage
which may be taken advantage of when desired to enable me to make the recess M.
shallower but if not so desired the projections c¹, c³, c³, and c, may be greatly
reduced in length or left plain.
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
"
The Improvements in flush sash lifts and in the manufacture of the same of the
front plate K and the flanged back plate H brought together to form practically
one plate substantially as herein set forth and illustrated upon the accompanying
drawings.