Apparatus for Opening and Closing Fanlights, Skylights, or Casements.
Year: 1888

page_text: Date of Application, 24th Mar., 1888
Complete Specification Left, 6th July, 1888
Complete Specification Accepted, 10th Aug., 1888
PROVISIONAL SPECIFICATION.
Apparatus for Opening and Closing Fanlights, Skylights, or
Casements.
I, JOHN HENRY MARSTON 9 Cobden. Street Humberstone Road Leicester in the
County of Leicester Pattern Maker do hereby declare the nature of this invention
to be as follows :-
To frame of casement I securely fasten a radius bar in section like a ordinary
ladder but with a horizontal swivel joint, about one inch from casement frame. The
upper part of this joint is shaped. Under the ladder bar and secured to top
bar of casement is a brass or iron box, above which and attached to, is a guide for
the ladder bar to slide through. It is this guide that operates on the shaped end
of swivel joint which causes ladder bar to move inward. when casement is closing and
outwards when casement is opening. Inside this box ] fix a worm with cog teeth
cut round its outer circumference. The worm is fixed so as to work between the
spaces in ladder bar. Below and gearing into cog teeth on worm is a small pinion.
When motion is given to pinion it causes the worm to move up or down the ladder
bar. On the pinion shaft is fixed a cord pulley partly surrounded by a ring of
metal. to prevent cord from lieving pulley, close to pulley is two glass eyes to prevent
cord from chafing.
Dated this 23rd day of March 1888.

page_text: DISCRIPTION VE
DRAWINGS, UEFERENUM
Fig. 4. plan, Fig. 5 front view of plate E.
Fig. 6.
circumference.
Fig. 7.
رو
DOEPT
of worm C. with cog teeth cut round its outer
Fig. 8 front view. Fig. 9 plan of cord pulley F with centre hole drilled and slotted
as shown, the small hole in edge of cord Pulley is for the purpose of threading cord
round pulley..
Fig. 10. plan. Fig. 11 front view of small pinion D, the end of pinion shaft is of
the same shape, as centre hole in cord pulley. When pinion shaft is drove through
cord pulley, its shape prevents it turning round.
Fig. 12 side view, Fig. 13. plan looking down on Ladder bar A, as it would appear
when casement is open.
Fig. 14. a section through line C. D. on Fig. 13.
Fig. 15 plan Fig. 16 front view of framing B. showing round stud i which
operates on L shaped end of ladder bar causing it to move round, parallel with
casement.
Fig. 17. represents another form of worm with small pinion combined, I fix this
in place of worm with cog teeth round its outer circumference, when worm is
required to travel at a faster. speed.
Having now discribed the different views of drawings, the operation is as follows
commencing with casement closed.
When motion is communicated to pinion shaft by cord round pulley, the pinion
communicates this motion to worm with cog teeth cut round outer circumference, the
worm then travels between spaces in ladder bar. On its journey the round stud, on
framing, presses against edge of ladder bar causing it to move from side of case-
ment, to right angles with casement, thus allowing worm to complete its journey to
extreme end of ladder bar. On the return journey, the round stud on framing presses
against shaped end of vertical swivel joint causing ladder. bar to move round
parallel with casement, allowing a blind to move up or down casement without coming
in contact with apparatus.
The apparatus can be fixed to side of casement when required.
. Alteration required would be to have ladder straight instead of curved.
The apparatus will open or close Lights or ventilators in Greenhouses or Con-
servatorys.
Having now particularly discribed and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The ladder bar A. with vertical joint J. and horizontal swivel joint G with
L shaped end.
2. The worm C. with cog teeth cut round its outer circumference and working
between spaces in ladder bar A.
3. The method as shown on, Drawings of fixing cord pulley F on pinion shaft.
4. Worm with small pinion combined as shown on Fig. 17 Sheet 2.
5. The general arrangements construction, and combination of parts together
constituting my improvements in the construction of apparatus for opening and
closing Fanlights, Skylights, or Casements.
Dated this 5th day of July 1888.