IMPROVEMENTS IN HAND-BLOWERS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I WILLIAM EDWARD GEDGE, of No. 11 Wellington Street, Strand,. London, in
the County of Middlesex, Patent Agent, do hereby declare the nature of my
"to be as follows:-
invention for "IMPROVEMENTS IN HAND-BLOWERS
This invention relates to certain improvements in hand blowers, and consists in
the application of toothed gearing from the crank shaft or point of application of
the power employed through a train of toothed gear wheels to the shaft which
carries the fan; of the collection and casing in of all the working parts of the
apparatus so that they are not exposed or widely separated; in a pin and means
for keeping the casing holding the gears in its proper place; and of steel buttons
in the ends or extremities of the bearings of the gear spindles in order to keep the
gears in their proper longitudinal positions, and take up end play.
Hand blowers now in general use are driven either by a crank or elso by a lever,
but before the power is applied to the shaft carrying the fan, it is transmitted
through belts, bands, worm or friction gears the fan in its casing being capable of
separation from the rest of the parts of the blower, the driving apparatus being
connected by belts, bands, etc., is likewise separated and also exposed.
In the invention the fan and driving incchanism are contained in a case of
peculiar construction all the driving parts being protected without interfering with
the free ingress of the air to the fan.
The frame or casing consists of three main parts the fan case, the cylindrical or
supplemental shell and the cover or exterior closing plate. The fun case is a
circular flanged casing having an outlet flanged so as to bolt on to any pipe to
carry off the blast produced by the fan which is encased in it.
A lug is cast upon one end of the fan case which is bored centrally to act as a
journal for the spindle carrying the fan, the opposite end having a journal box.
Circular openings in the ends of the fan case allow air to enter.
A circular flange is formed upon one end of the case and this flange is drilled to
receive bolts for bolting the cylindrical shell and Cover to it. A projection is faced
at right angles to the axis so that the corresponding face of the cylindrical shell
shall sit true upon it.
A circular aperture slightly larger than the fan diameter is bored out of the
flanged head to receive a projecting circular plate part of the cylindrical shell.

page_text: The cylindrical or supplemental shell, casing in the gear, has a partition dividing
it into two parts; this partition has an opening in it to allow the air to pass
through it on its way to the fan. A hole is also bored or cored in the centre to
allow the fan spindle to pass through.
Connected to this partition by three lugs which are bored and act as journals
for the gear spindles is a circular plate which serves to complete the fan casing
and also acts as an adjustment of the cylindrical shell from the fact that it is
accurately fitted to the part bored for its reception in said shell and serves to
keep the axis the shell coincident, with the axes of the fan case and the cover.
There is a large circular hole in the centre of this plate to allow the air to pass
through to the fan. One of its faces serves as a longitudinal adjustment.
The circular cover or exterior closing plate has a groove turned in it to fit a
ring of the cylindrical shell. This groove serves to keep the axis of the cover
coincident with those of the fan case and cylindrical shell. It has four lugs cast
upon it which are bored to act as journals for the gear spindles.
A rabbeted edge or flange might be cast on or formed around the circumference
of the face of the plate forming the cover to receive the above mentioned flange or
ring with equally good results.
The cover or exterior closing plate also has openings in it to allow the air to
enter and a shelf cast upon it which serves to entirely case in the gear wheels
thereby keeping them free from dust and liability to accident.
Bolt holes are bored through it corresponding to those on the main flange of the
fan case and it is bolted to said flange. A hole is bored through the cover into the
shell and a pin driven therein so as to keep the gears in their proper position.
A large gear or toothed wheel keyed on the crank shaft, drives a pinion which is
cut on a shaft which carries another large gear which drives a pinion cut on a shaft
that carries another large gear which drives a pinion cut or keyed on the spindle
carrying the fan.
The spindles which carry the gears and fan are run in journals which are brass
brushed-and-have-steel-buttons at their extremities and are so adjusted that there
is no lateral play of the fan or gears anywhere, the end bearing being being
entirely taken up by the buttons. This prevents end motion of the spindles,
which if allowed would necessitate a greater depth of case and a wider separation
of the gears to prevent their striking each other. By my construction I am
enabled to run them very closely and Compactly.
By thus abandoning belting and using direct toothed gearing set in motion by a
crank. I get the maximum elliciency of the power applied.
The air enters the fan chamber through an opening on one side and on the other
side through the two openings in the cover thence through an opening in the shell
thence through the opening in the circular plate into the fan casing and by the
revolution of the fan is driven through the opening at the bottom of the fan case.
I am aware that fan blowers have been driven by worm gears, and by pulleys
and connecting belts by which tho requisite speed is produced and I do not propose
to claim such a construction.
Dated this J
T
1004

page_text: and also acts as an adjustment of the casing Y from the fact that it is accurately
fitted to the part bored for its reception in X and serves to keep the axis of Y
coincident with the axes X and Z.
There is a large circular hole in the centre of this plate to allow the air to pass
through to the fan. The face t, t, serves as a longitudinal adjustment.
Z is a circular cover having a groove turned in it to fit the ring n, n, of Y.
This groove serves to keep the axis of the cover Coincident with those of X and Y.
It has four lugs & cast upon it which are bored to act as journals for the gear
spindles.
It will be manifest that a rabbeted edge or flange might be cast on or formed
around the circumference of the face of the plate Z, to receive the flange n with
equally good results.
It also has openings in it to allow the air to enter and a shelf J cast upon it
which serves to entirely case in the gear wheels thereby keeping them free from
dust and liability to accident. Bolt holes are bored through it corresponding to
those on the main flange of X and it is bolted to said flange of X A hole i is
bored through the cover Z into the casing Y and a pin driven therein so as to keep
the gears in their proper position.
A is a large gear keyed on the crank shaft; this drives the pinion B which is
cut on the shaft which carries the large gear C. This large gear C drives a
a pinion cut on the shaft that carries the large gear E. This large E drives the
pinion F, which is cut or keyed on the spindle carrying the fan.
The spindles which carry the gears and fan are ran in journals which are brass
bushed and have steel buttons 8, 8, at their extremities and are so adjusted that
there is no lateral play of the fan or gears anywhere, the end bearing being
entirely taken up by the buttons. This prevents end motion of the spindles, which
if allowed would necessitate a greater depth of case and a wider separation of the
gears to prevent their striking each other. By my construction I am enabled to
run them very closely and compactly.
It will thus be seen that I have done away with the causes of inefficiency
incident to hand-blowers-now in use, and the liability to accident and breakage by
concentrating the apparatus into what is in reality one compact casing..
By abandoning belting and using direct toothed gearing I get the maximum
efficiency of the power applied. By turning the crank R the gearing is set in
motion. The air enters the fan chamber through m, on one side and on the
other side through the two openings in the cover Z thence through P, thence
through the opening in the circular plate into the fan casing X and by the
revolution of fan M is driven through the opening O.
I am aware that fan blowers have been driven by worm gears, and by pulleys
and connecting belts by which the requisite speed is produced and I do not claim
such a construction.
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
1º. In a blowing apparatus, a fan having its shaft journaled, so that it turns
within a containing case, and a pinion formed or secured directly upon the
shaft in combination with a train of gearing connected with said pinion
and journaled so as to turn in a chamber formed at one side of the fan case,
substantially as herein described.
20. The fan case, having a box centrally located at one end to receive the fan
shaft and an opening at the opposite end sufficient to allow the passage of
the fan, in combination with the shell Y, having a plate to fit said opening
and journal boxes for one end of the gear shafts and a plate Z fitting the
opposite end of the shell and having journal boxes for the opposite ends of
the gear and fan shafts, substantially as herein described.

page_text: The fan-case X supplemental shell Y with its diaphragm r and journal boxes
for gear shafts in combination with the exterior closing plate Z formed to
fit the edge of the shell and having a means for adjusting and securing it to
the fan case substantially as herein described.
The fan case X supplemental shell Y with its diaphragm r and gear wheels
journaled within as shown, in combination with the external closing plate Z
and the transverse shelf or diaphragm J whereby the gears are enclosed
substantially as herein described.
The fan case having air passages around the central shaft, supplemental shell
within which the driving gears are contained and the diaphragm and
exterior closing plate, said plate and diaphragm being provided with
openings through which air may pass to the fan case substantially as herein
described.
-
The fan case, supplemental shell and exterior closing plate, with journal boxes
for gear and fan shafts as shown in combination with the buttons or disks
fitted into the ends of the journal boxes, to prevent end motion substantially
as herein described.
The fan case supplemental shell and the exterior closing plate Z, with journal
boxes for gear and fan shafts said plate being grooved or channeled to fit
the edge of the supplemental shell, and having a pin fitting a corresponding
socket whereby the plate is held in one position and the journal boxes and
shafts are always kept in line substantially as herein-described.
Dated this Seventeenth day of March 1884.