A Self-acting Revolving Shutter or Blind for preventing accidents in Shafts, Hoists, Lifts, or Elevators
Year: 1887

page_text: Date of Application, 4th June, 1887
Complete Left, 20th Feb., 1888
Complete Accepted, 6th Apr., 1888
I FREDRICK HOWARD SMITH of No. 5 University Terrace Belfast in the County of
Antrim Ireland Architect, do hereby declare the nature of this invention' to be as
follows:-
A Self-acting Revolving Shutter or Blind for preventing accidents in Shafts, Hoists,
Lifts, or Elevators.
The invention consists in fixing a drum or roller of iron or wood, with a grooved
wheel or pulley fixed on each end, at the Top and Bottom of the Shaft or Opening in
which the Cage, Bucket, Lift, or Elevator travels; one end of the Shutter or Blind
is fastened to the upper drum or roller and the other end to the top of the Cage or
Bucket, the one end of a second Shutter or Blind is also fastened to the lower drum
or roller and the other end to the bottom of the Cage or Bucket, these Shutters or
Blinds may be of wood, or of iron louvres, or laths, or other metal, or in one sheet;
or canvas with iron or wooden laths fastened at equal distances horizontally across
them and working in a groove at each side of the Shaft or Opening, to form a guide
for the Shutters or Blinds; the wheel or pulley at top and bottom of the Shaft or
Opening, at one side, is connected by a chain, rope, or belt fastened to the lower
wheel or pulley and then wound round the upper wheel or pulley as often as is
necessary to allow the Cage or Bucket to ascend to the top of the Shaft or Opening;
on the other side a second chain, rope, or belt is connected to the upper grooved
wheel or pulley and wound round as often as is necessary for allowing the Cage or
Bucket to ascend to the top of the Shaft or Opening; and then fastened to a balance
weight for lifting the Cage or Bucket, and also prevents the upper Shutter or Blind
getting slack and jambing in the grooves or guides at the sides of the Shaft or
Opening; the Shutters or Blinds have small friction rollers to keep them in the
grooves or guides.
Dated this 2nd day of June 1887.

page_text: Self-acting Revolving Shutter or Blind for Preventing Accidents
in Shafts, Hoists, Lifts, or Elevators.
I FREDRICK HOWARD SMITH of No. 5 University Torrace. Belfast, in the County
of Antrim Ireland, Architect, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
A new application or adaptation of the Revolving Shutter or Blind to prevent
accidents in Shafts, Hoists, Lifts, or Elevators.
The Invention consists in fixing a drum or roller of iron or wood with a grooved
wheel or pulley fixed at one end, at the Top.and Bottom of the Shaft or Opening, in
which the Cage, Bucket, Lift, or Elevator travels; one end of the Shutter or Blind
is fastened to the upper drum or roller, and the other end to the top of the Cage or
Bucket the one end of a second Shutter or Blind is also fastened to the lower drum
or roller, and the other end to the bottom of the Cage or Bucket, these Shutters or
Blinds may be of wood, or of iron louvres, or laths, or other metal, or in one sheet,
or canvass with iron or wooden laths fastened at equal distances horizontally across
them and working in a groove at each side of the Shaft or Opening, to form a guide
for the Shutters or Blinds; the wheels or pulleys B B at top, and CC at bottom of
the Shaft or Opening, at one side, is connected by a chain, rope, or belt fastened to
the lower wheel or pulley C, and then wound round the upper wheel or pulley B
as often as is necessary to allow the Cage or Bucket to ascend to the top of the Shaft
or Opening on the other side a second chain, rope, or belt is connected to the upper
grooved wheel or pulley B and wound round as often as is necessary for allowing the
Cage or Bucket to ascend to the top of the Shaft or Opening, and then fastened to a
balance weight D to prevent the upper Shutter or Blind E getting slack and jambing
in the grooves or guides F F at the sides of the Shaft or Opening; the Blind or
Shutter drums or rollers A A can also be worked by two balance weights D D as
shewn in the drawing, instead of the chain, rope, or belt to connect the wheel or
pulley B on the top and bottom drum or roller A, the rope or chain hangs direct
from the upper drum or roller A, and the rope or chain from the lower drum or
roller A, is carried up and falls over a sheave or pulley H, fixed at or near the
upper drum or roller A; the Shutters or Blinds EE havo small friction or guide
rollers K K to keep them in the grooves or guides F F. The two timber guides L L
shewn at each side of the plan, and on the section, aro to guide or steady the balance
weights D D when rising and falling.
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,
A new application or adaptation of the Revolving Shutter or Blind, to prevent
accidents in Shafts, Hoists, Lifts, or Elevators.