Year: 1888

page_text: Date of Application, 13th Nov., 1888
Specification Accepted, 31st Dec., 1888
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings, in the County of Middlesex, 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:-
This invention relates to machines used for sand papering and especially to the
adjusting devices for determining the parallelism of the sand cylinder, and the table
which overlies the same, and which is commonly known as the sand guard, and also
for regulating the depth of the cut to be given by the action of the sand paper; and
also to the mechanism for imparting an axially longitudinal reciprocating motion to
the revolving sand cylinders, and to other parts designed for perfecting the operation
of the machine which will be hereinafter described.
As the general construction of such machines is well known it will be unnecessary
to set out more than the portions of the machine to which the present improvements
are applied.
The machine to which the said improvements are specially applicable is formed
of a main frame carrying a series of sand paper cylinders, the periphery of which,
appearing through a slot in the sand guard, acts upon a board which is introduced
between positively actuated feed rolls, carried, part in the main frame, and part
in a vertically and independently adjustable frame which also carries the pressure
rolls.
The main frame and pressure frame are connected by a screw passing through the
latter into the former and a guide pin which serves as a guide and support to the
screw against transverse strain.
In the accompanying drawings
Figure 1 is a perspective view of the entire machine.
Figure 2 is an elevation parily in soution of the woohing or eran from ana cida

page_text: Figure 3 is a vertical section through the centre of one of the said cylinders.
Figure 4 is a transverse section of a sand cylinder showing the mechanism for
securing the sand paper on the cylinder.
Figure 5 is a partial longitudinal section of the same, and
Figure 6 is an elevation showing one end of the cylinder.
The same letters are employed in all the figures to designate similar parts.
The main frame carries a series of, preferably, three sand paper cylinders, marked
respectively No. 1, No. 2, and No. 3. More or fewer may be employed. The
adjusting mechanism hereinafter described is applicable to each of the cylinders and
its sand guard, and is duplicated to any extent required; to describe its application to
one will therefore be sufficient.
Immediately under the shaft of each cylinder, I place a through shaft A, which
projects at both ends beyond the main frame, and carries on the overhung ends
swinging arms B, which are pivoted at one end to the frame and are adjustable at the
free end, vertically by means of the set screws B¹, passing through lugs on the main
frame. The adjustment of these set screws regulates the position of the shaft A.
When this adjustment has been made the arm B, is confined further by a set screw B²,
passing through a slot therein.
On the same shaft A, is placed immediately inside the frame, on both sides other
arms C, which are attached to the shaft by set screws C, so that when. the arm is
turned at one end it will turn the shaft and the corresponding arm at the other end
of the through shaft A. The arm C is actuated on one side, by a bar C, attached
thereto by a bolt. This bar C, extends out through the main frame at the end of
the machine and is fastened to an extension C³, by a bolt. C. The extension is
surrounded by a sleeve C, the two parts being connected by a male and female
screw, and the sleeve is turned by a hand wheel C. As the sleeve is confined in the
frame so that it cannot move lengthwise when it is turned, the bar C², will be drawn
or thrust so as to swing the arm C.
The arm C is formed with a segmental excentric slot C, to receive a wrist pin D,
attached to the vertically sliding frame R, which carries one end of the sand cylinder
shaft G. This frame slides in ways attached to the main frame and is raised or
lowered by the action of the excentric slot C, on the wrist pin D. A corresponding
arm and frame at the other end of the cylinder shaft G, and shaft A, similarly raises
or lowers that end of the cylinder shaft. A slot E, in the frame E, permits this to
be done without interference by the shaft A, which passes through the slot and also
allows the shaft to be independently adjusted by means of the arms B.
Similar mechanism is attached to all the sand cylinders so as to permit their
independent adjustment in relation to the sand guards F, for the determination of the
amount of the cut. These sand guards are also independently adjustable with a
view to establishing and maintaining their perfect parallelism in reference to the
surface of the cylinders.
They are iron tables or plates covering that portion of the space enclosed within the
main frame which is immediately over the sand cylinders and are slotted so as to
permit the peripheries of the sand cylinders to appear above the plane of their upper
surface. Unless these surfaces are parallel in all parts to the cutting surface of the
cylinder, the work will be imperfect; and as heretofore constructed the part of the
table opposite the middle of the slot was liable to sag under the pressure of the board,
being unsupported except at the corners. Struts F¹, are attached to the main frame
by dovetailed recesses, and through the struts are passed; at one or more places,
rods F2, formed with threads. A nut F³, above the strut and another below F
determine the elevation of the point of the rod which bears against a flange F, on the
sand guard F. One such rod may be used by attaching a collar or head Fe, to
support two of the tables F, where their edges adjoin.
To support the corners of the table or sand guard F, I form it with lugs F', to rest
upon the heads of set bolts F, passing through lugs Flo, on the main frame, and with
square ends beneath the lug Fo, to receive a wrench by which they may be turned.
Through the lugs F7, set screws F8 are tapped the lower ends of which are received
3
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page_text: has been properly adjusted.
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It is desirable that the sand cylinders shall have imparted reciprocating movement,
as well as one of rotation. The former is provided in the following manner.
Horizontal shafts H', are hung on hearings on the outside of the main frame,
carrying on the outer end a bevel pinion which may be driven by a corresponding
mitre wheel on a transverse driving shaft, or said shaft may be otherwise driven from
any convenient part.
This shaft carries an excentric H, which revolves within a frame H³, placed within
the jaws of an arm I, which confines it side wise while they permit it to play freely in the
other direction. I is a cap confining the frame H2. The arm I is attached to a collar I',
surrounding the cylinder shaft G. This collar is confined end wise between rings I³
fastened to shaft G, by set screws which turn with said shaft, while the shaft rotates
within the collar I. The excentric H, imparts to the shaft G, a longitudinal recipro-
cating motion in its box L, in which it revolves.
K is a bracket bolted to the main frame which carries the boxes K of the shaft H.
It has hitherto been usual to uso a series of sand cylinders of the same size, and
revolving at the same speed to dress and polish the wood; but in these machines the
work is imperfect, as the wood is left with a sort of fine fuzz on its surface. To
remove this and more perfectly polish the surface of the wood, I introduce another,
preferably, smaller, and more rapidly moving sand cylinder covered with finer sand
paper, acting with a light touch upon the surface of the wood to remove such fuzz.
The sand paper is cut into sheets of sizes proper for covering the entire surface of
the cylinders, and attached thereto in the following manner. On the shaft G is the
sand cylinder G¹, on the periphery of which a groove G2 M is the head of the
cylinder, inside of which is a sliding plate N formed as shown. A rack N', is formed in
a recess in the plate, and a slot at N2, and another recess at N³, in the latter is a guide
pin P. O is a pinion engaging the rack N', and turning by a spindle O¹, and
wrench 02, outside the head. Q is a pin on a sliding bar or bolt R, which extends
radially through the bottom of the groove G2, and said pin Q, extends through the
slot N. When the pinion is turned, the plate is caused to move transversely in the
line of the recess N³, and the rack N, and draws the pin Q, and bolt R, radially
toward the centre, or projects it in the opposite direction.
R' is a semi circular trough attached to the head of the bolt R, and inside it is a
button R, which turns on a stem introduced into the head of the bolt. On the outside
of the head G, a racket s is attached to the spindle O¹ and receives a pawl S¹ which
may be disconnected by an excentric S².
The paper is cut to the proper size and passed around the cylinder. The head of
the bolt is projected and the button R turned lengthwise of the trough R'. The
ends of the paper are then passed over the heads of the buttons over which the
trough 1, is laid and then the buttons aro turned transversely in the trough, thus
fastening the ends of the sheet of sand paper. The plate N, is then drawn down,
drawing the bolt R with it to tighten the sheet and bring the paper fastening device
into the groove G².
These fasteners may be reproduced at intervals, and all simultaneously operated by
extending the spindles s through the series.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondents I declare that what I claim is :-
First. In combination with the sand cylinder and shaft of a wood polishing machine
a through shaft A, carrying the cylinder bearings, and the arms B, and set screws for
adjustably supporting the ends of the shafi, substantially as set forth.
Second. In combination with the sand cylinder and shaft, the through shaft A,
frame E, having a stud pin D', and the adjustable slotted arm C, regulating the
position of the cylinder, substantially as set forth.
Third. In combination with the sand cylinder G', and shaft G, the through shaft A,

page_text: adjustable arms B, swinging arms C, and slotted frame E; whereby the ends of
the shaft. A, can be independently adjusted, and both ends of the sand cylinder can be
equally and simultaneously moved substantially as set forth.
Fourth. In combination with the sand cylinder, and shaft G, the vertically
adjustable frame E, arm C, bar C, and sleeve (³, threaded thereon and confined so as
to have only a motion of rotation, substantially as set forth.
Fifth. In combination with the sand cylinder and shaft G, the vertically adjustable
frame E, arm C, rod C³, sleeve C³, confined to the main frame and hand wheel C',
substantially as set forth.
Sixth. In combination with the sand cylinder and sand guard or table F, adjusting
bar F, arranged to support the table between its ends, and strut F1, supporting said
bar adjustably, substantially as set forth.
Seventh. In combination with the sand cylinder, main frame and sand guard or
table, F, the adjustable supporting bolt F, and locking bolt F, substantially as set
forth.
Eighth. In combination with the table or sand guard F, independently adjustable at
each end, the sand cylinder G, independently adjustable at each end and also
simultaneously adjustable at both ends, substantially as set forth.
Ninth. In combination with the sand cylinder and shaft G, the excentric H,
shaft H, and sleeve 1', and arm I, which receive a reciprocating movement from the
excentric and impart it to the cylinder, substantially as set forth.
Tenth. In combination with the sand cylinder and shaft G, the excentric H,
shaft H frame Harm I, sleeve I', and rings 13 substantially as set forth.
Eleventh. In a wood polishing machine a series of sand cylinders having different
degrees of fineness, and rotating at different peripheral velocities, one or more of said
cylinders having also a longitudinal reciprocation, substantially as set forth.
Twelfth. In combination with the grooved sand cylinder the reciprocating bolt R,
and paper clamp, and the transversely sliding plate N, by which the bolt is moved
radially, substantially as set forth.
Thirteenth. In combination with the sand cylinder, the reciprocating bolt R, and
paper clamp R, R², pin Q, plate N, having transverse recesses, pin P, and rack N'
and pinion O, substantially as set forth.
1
Novamber 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.