Improvements in Window Cleaning Chairs or Platforms.
Year: 1897

page_text: Date of Application, 7th Sept., 1897
Complete Specification Loft Ath July 1000 hocenter 6th 1
1000
PROVISIONAL SPECIFICATION.
Improvements in Window Cleaning Chairs or Platforms.
I, THOMAS WELCH, (Engineer), of 200, East 69th Street, New York City, in
the County and State of New York, United States of America, do hereby declare
the nature of this invention to be as follows:
The object of my invention is to provide a window cleaning chair or platform
which may be securely fastened to any window in a convenient and expeditious
manner and which may be readily carried from one window to another or to any
portion of a building.
The invention consists in the novel construction and combination of the several
parts as will be hereinafter fully set forth.
The invention will be described as applied to a window frame having the usual
inside sill and in connection with which an outside sill is used, the said frame
being also provided with the usual division beads separating the sash grooves.
The chair consists of a seat and a back, a supporting post being attached to the
bottom portion of the seat at the back, adapted to rest upon the outer sill. An
extension bar which contains the adjusting mechanism is attached to the front
portion of the seat and extends usually beyond its sides. The extension bar is
provided with a longitudinal chamber having tie or cross bars at each side of the
central portion of said chamber and other cross bars between said bars and
the ends of the chamber. An opening is made in the top and the bottom of the
extension bar of the seat, the openings being usually made of elliptical shape.
At the opening an elliptical nut is exposed terminating at each end in a tube
located within the chamber. The tubes are made somewhat thick at their ends
and in the end portion of one of said tubes an opening having a right-hand thread
is provided and at the opposite end an opening having a left-hand thread in its
wall is made. The tubular extensions of the nut are passed through openings in
the cross bars and have annular shoulders formed thereon engaging with the
inner faces of the said cross bars whereby the nut and its tubular extensions may
be turned and yet be held against end movement. The peculiar shape is given
to the nut in order that it shall not interfere with a person seated in the chair.
In connection with the extension of the chair two clamping shoes are employed.
each provided with a recess so arranged as to receive a parting or dividing bead
of the sash grooves of the window frame. The shoes are of such length that they
will fit snugly in the said grooves and have bearing against the outer stop bead
as well as against the inner stop bead of the frame. A screw is secured to each
shoe usually at its centre, the thread of the screw on one shoe being a right hand
thread and that on the other shoe a left-hand one. These screws are adapted to
enter openings in the extensions of the nut having correspondingly threaded
walls. Guide rods are located at each side of each screw which guide rods and
likewise the screws are loosely passed through openings in end plates attached to

page_text: the extensions of the chair and through corresponding openings made in the
partitions in the chamber. Preferably near each end of the extension bars of the
chair ears are formed between which clamps are pivoted. These clamps are made
in two sections connected by a right and left-hand threaded screw operated through
the medium of a nut and the two sections are guided in their adjustment by rods
which are secured to one of the sections at each side of the adjusting screw and
enter openings in the opposing section. The outer section of each clamp
terminates in a hook or is so formed that it may engage with the inner longi-
tudinal edge of the inner window sill.
It is obvious that by turning the adjusting nut in one direction the shoes will
be forced to an engagement with the sides of the window frame and by turning
the nut in an opposite direction the shoes will be drawn inward and the chair
may be disconnected from the window. The clamping shoes are usually sufficient
to hold the chair in position in the window frame, the clamps being simply
employed as additional means of safety. The shoes may be so shaped and be of
such dimensions as to fit between the stop beads of any window frame.
I desire it to be understood that any equivalent of the screw adjusting device
may be employed without departing from the spirit of the invention.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.
improvements in window Cleaning Chairs or Flatforms.
I, THOMAS WELCH, of 200, East 69th Street, New York City, United States
of America, Engineer, 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::-
The object of my invention is to provide a window cleaning chair or platform
which will be safe, simple, durable and economic, which may be securely fastened
to any window in a convenient and expeditious manner and which may be readily
carried from one window to another, or to any portion of a building.
The invention consists in the novel construction and combination of the several
parts, as will be hereinafter fully set forth and pointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding parts
in all the figures.
Figure 1 is a horizontal section through a window frame, the section being
taken on the line 1-1 of Figure 2, and also a plan view of the window cleaning
chair in position in the window frame, a portion of the chair being broken
away;
Figure 2 is an outside view of a portion of the window frame, and a rear
elevation of the window cleaning chair in position in the frame;
Figure 3 is an enlarged detail sectional view of the adjusting device for the
locking mechanism of the chair; and
Figure 4 is a transverse section taken substantially on the line 4-4 of Figure 1.
A represents a window frame having the usual inside sill 10, and in connection
with which an outside sill 11 is used, the said frame being also provided with the
usual division beads 12, separating the sash grooves. In the drawings I have
illustrated the application of the invention to a chair, which consists of a seat 13
and a back 14, a supporting post 15, being attached to the bottom portion of the

page_text: seat at the back, adapted to rest upon the outer sill 11. An extension bar 16
is attached to the front portion of the seat. This bar contains the adjusting
mechanism, and extends usually beyond the sides of the seat. The extension
bar 16 is provided with a longitudinal chamber 17, having tie or cross bars 18 at
each side of the central portion of said chamber, and other cross bars 19 between
said bars 18 and the ends of the chamber.
An opening 20 is made in the top and the bottom of the extension bar 16, and
usually these openings are of elliptical shape, as illustrated. At the opening 20
an elliptical nut 21 is exposed, terminating at each of its ends in a tube 22
located within said chamber. The tubes 22 are made somewhat thick at their
ends, and in the end portion of one of said tubes an opening having a right-hand
thread is provided, and at the opposite end an opening having a left-hand thread
in its wall is made. The tubular extensions of the nut 21 are passed through
openings in the cross bars 18 and have annular shoulders 23 formed thereon,
engaging with the inner faces of the said cross bars, as shown in Figure 3.
whereby the nut and its tubular extensions may be turned, yet these parts will
be held against end movement. The peculiar shape is given to the nut 21 in
order that it shall not interfere with a person seated in the chair.
In connection with the extension of the chair two clamping shoes 24 are
employed, and each shoe is provided with a recess 25, so arranged as to receive
a parting or dividing bead of the sash grooves of the window frame, as illustrated
in Figure 1; and the shoes are of such length that they will fit snugly in the
said grooves, and have bearing against the outer stop bead as well as against the
inner stop bead of the frame. A screw 26 is secured to each shoe, usually at
its centre, the thread of the screw on one shoe being a right-hand thread, while the
thread of the screw on the other shoe is a left-hand one. These screws 26 are
adapted to enter openings in the extensions of the nut 21 having correspondingly
threaded walls.
Guide rods 27 are located at each side of each screw 26, which guide rods and
likewise the screws are loosely passed through openings in end plates 28, attached
to the extensions of the chair and through corresponding openings made in the
cross bars or partitions 19 in the chamber 17.
Preferably near each end of the extension bar 16 of the chair, ears 29 are
formed, between which clamps B are pivoted. These clamps are made in two
sections b and 61, connected by a right and left-hand threaded screw 30, operated
through the medium of a nut 31, as shown in Figure 4, and the two sections are
guided in their adjustment by rods 32, which are secured to one of the sections at
each side of the adjusting screw, and enter openings in the opposing section.
The outer section of each clamp B, terminates in a hook 33, or is so formed that
it may engage with the inner longitudinal edge of the inner window sill 10.
It is obvious that by turning the adjusting nut 21 in one direction, the shoes 24
will be forced to an engagement with the sides of the window frame, and by
turning the nut 31 in an opposite direction, the shoes will be drawn inward
and the chair may be disconnected from the window. The clamping shoes 24 are
usually sufficient to hold the chair in position in the window frame, the clamps B
being simply employed as additional means of safety. The shoes 24 may be so
shaped and be of such dimensions as to fit between the stop beads of any window
frame.
I desire it to be understood that any equivalent of the screw adjusting device
may be employed, without departing from the spirit of the invention.
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:
1. The combination with a window chair or platform, of a chambered extension
thereon, a tube mounted to rotate in the extension, the said tube having threaded
portions at its ends, rods having threads engaging the screw threads of the tube,

page_text: and shoes on the outer ends of the rods, the said shoes being recessed to receive the
parting beads of a window casing, substantially as specified.
2. The combination with a window chair or platform, of a chambered extension;
thereon, a tube mounted to rotate in the extension, a nut on the tube and
projected through top and bottom openings in the extension, means for preventing
longitudinal movement of the tube relatively to the extension, screw rods operated
by the tube, and shoes on the outer ends of the rods, substantially as specified.
3. The combination with a window chair or platform, of a chambered extension
thereon, a tube mounted to rotate in the extension, screw threaded rods operated
by the tube, shoes on the outer ends of said rods, and guide rods extended from
the shoes through holes in end plates on the extension, substantially as specified.
4. The combination with a window chair or platform, of laterally movable rods,
shoes on said rods for engaging a window casing, adjustable clamps for engaging
the inner side of a window casing, and guide bars for the clamps, substantially as
specified.
5. The combination with a window chair or platform, of clamps pivotally con-
nected thereto, each clamp consisting of two sections, a screw for adjusting one
section longitudinally with relation to the other section, and guide rods for the
adjustable section, substantially as specified.
1
Tl 1900
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.