Improvements in Rubbing or Polishing Machines.
Year: 1893

page_text: Date of Application, 24th Oct., 1893-Accepted, 25th Nov., 1893
COMPLETE SPECIFICATION.
Improvements in Rubbing or Polishing Machines.
A communication by the MOORE CARVING MACHINE COMPANY, of No. 1919,
Portland Avenue, Minneapolis, in the County of Hennepin and State of
Minnesota, United States of America.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6 Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil 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 this invention is to provide a machine for sand papering, rubbing
or polishing the surface of articles manufactured of wood or other material capable
of taking a polish, which machine is strong and enduring in all its parts, is simple
in its construction, is capable of fine adjustment, is easy of manipulation, and is
adapted to polish flat, bevelled or rounded surfaces, both on the top and the sides
of the article being polished.
In the drawings:-
Figure 1 is a side elevation of the complete machine, parts being broken away
for convenience of illustration.
Figure 2 is a front elevation of the machine taken at a right angle to Figure 1,
parts being broken away, and omitted for convenience of illustration, and other
parts being broken away to exhibit interior construction.
Figure 3 is a view, mostly in central, longitudinal section, of the buffer or
polisher carriage and a fragment of the bar or guide on which it travels, with a
fragment of the mechanism by which the carriage is operated, and with the buffer
or polisher attached thereto.
Figure 4 is an end view of the mechanism complete that is shown, mostly in
section, in Figure 3.
Figure 5 is a detail of a weight or counterpoise and its supporting and adjusting
devices.
Figure 6 is a detail of the guide-supporting yoke or arms.
Figure 7 is a detail, partly in section, of an adjusting device.
In these drawings-
A, is a standard terminating at its upper extremity in an overhanging laterally
deflected arm A, on which standard most of the operative mechanism is
supported.
This standard serves the purpose of, and is a permanent frame or support for
much of the operative mechanism, and the form and construction of this standard
or frame are not necessarily essential to the invention, though the form and con-

page_text: article being polished while supported on the car, is exerted more directly against
the fixed support, and is thereby best resisted. A dressing case or bureau is
indicated at G, being an article among the many which this machine is adapted to
polish. The rails C C are laid, and the car D is adapted to travel laterally, or
substantially at a right angle to the reciprocating movement of the buffer or
polisher carriage hereinafter described.
A buffer or polisher carriage 10 is mounted and reciprocates on the guide bar 11.
The guide bar 11 consists preferably of a hollow cylindrical steel tube, provided
with a fixed wood termination 12, forming a handle to be grasped by the operator,
and an inserted telescoping rod 13, forming its other extremity, secured adjustably
in place by the set screw 14. This guide bar 11 is pirotted medially, so as to
have vertical movement in an upturned yoke 15 swivelled on a ledge or pro-
jection 16 integral with the standard A. The vertical oscillating movement of
the guide bar is limited by the stop 17 around the guide bar, the stop being
fixed on the standard A. The carriage 10 and the excess in weight of the guide
bar in front of the yoke 15 are counterbalanced by weights 18 located adjustably
on the rear end of the guide bar and conveniently on the extension rod 13. For
securing a nice adjustment of these weights 18, they are preferably formed in pairs
secured to the extremities of a cross head 19, which cross head is suspended
pivotally from a yoke 20 mounted adjustably on the rod 13, and held thereto by
the set screw 21. The cross head 19 is suspended on the yoke 20 by means of the
pivotting screws 22 turning through the yoke into conical recesses therefor in the
cross head. The weights 18 are severally secured to the cross head by the set
screws 23.
The carriage 10 is constructed preferably as a cylindrical sleeve about the guide
bar 11, the sleeve being provided with interior longitudinal brasses 24, 24' at the
top and bottom respectively, secured in place adjustably by set screws 25, 25. A
feather 26 (Figures 3 and 4) enters a longitudinal groove therefor in the underside
of the guide bar 11 and prevents rotary movement of the carriage on the guide bar.
The brasses are provided with pockets containing graphite 27, for lubrication.
This carriage, 10, which reciprocates on the bar 11, carries the buffer or polisher
thereon. For this purpose, an adjustable block 28, having its extremities turned
iuwardly radially, is fitted to bear at the inner surfaces of these inwardly turned
ends against the surface of the sleeve of the carriage 10 and to be adjustable
circumferentially on the sleeve. The radially inwardly turned ends of this block 28
are extended or turned inwardly horizontally, forming flanges 29, which pass under
the longitudinally projecting or overhanging edges of segmental or partially
⚫ circumferential ribs 30 on the sleeve of the carriage. The block 28 is locked
releasably in position on the sleeve of the carriage by the set screws 31. By this
construction, the polishing block may be secured to the carriage in such position as
to polish the top surface of an article on the car D, or at such other angle radially
on the carriage as to adapt it to polish the side of the article, or a bevelled or curved
part thereof.
A tiltable head-block 32 is attached to the adjustable block 28 centrally, by a
bolt 33. This head-block 32 is provided centrally with a rounded projection or
boss 34, which enters the correspondingly concave recess therefor in the block 28,
forming a curved or ball bearing, and an opposite and corresponding boss 35 on the
under surface of the block 32 fits in a corresponding concave recess in a washer 36,
about the bolt 33 inside of the nut turning thereon, which latter boss and concave
washer also form a curved or ball bearing for the movement of the block 32. The
bolt 33 is supported in the block 28 and passes transversely through the block 32
in the axis of the bosses 32 and 35. The aperture in the block 32 through which
this bolt passes is enlarged from the medial plane of the block outwardly in both
directions toward its surfaces, thereby providing for the limited tilting of the block
on the bolt. The block 32 diverges from block 28 outwardly. This permits the
tilting of the block 32, which is also provided for by the clearance of the bolt 33
in the block 32. This provision for the tilting of the block 32 permits of the

page_text: adjustment of the polisher to uneven or billowy surfaces on the article being
polished. A pin 37, fixed in the block 32, which enters loosely an aperture therefor
in the block 28, prevents the horizontal rotation of the block 32. The longitudinal
extremities of the block 32 are turned downwardly and inwardly, forming transverse
ways or bearings 38, adapted to receive projecting parts of the sand-paper, or
polisher block 39. The block 39, being removably inserted in the block 32, is
secured temporarily therein by the buttons or latches 40 pivotted to the block 32,
which fall by gravity in front of the edge of that portion of the block 39 that is
received on and supported by the ways 38. This block 39 may be of material
adapted to serve as a buffer or polisher, but it is intended that its under surface
shall be covered with sand-paper, leather or other suitable material for abrading,
polishing or buffing, as desired.
For reciprocating the buffer or polisher, a fly wheel 41 is fixed on the shaft 42,
having a band wheel 43 on which a belt 44 runs from the power supply. The
shaft 42 has its bearings in a box 45, the parts of which box are secured and made
adjustable in the standard A transversely thereof, in an aperture therefor, by the
bearing screws 46. An oil cup 47, provided with a suitable tube therefor, supplies
oil to the box 45 for the lubrication of the shaft 42. A vibrating arm 48, pivotted
to and depending from the overhanging arm A¹ of the standard A, is provided
medially with a truss 49, and is connected operatively to the fly wheel 41 by a
furcate or slotted pitman 50, which straddles and furnishes a bearing for the
vibrating arm and is pivotted at its front extremity to the truss 49 medially, and
at its rear extremity is connected adjustably to a radial spoke of the fly wheel 41,
by a holding bolt 51, serving as a wrist pin on the fly wheel. The head of the
bolt 51 enters and is adjustable radially of the wheel in a channel 52 therefor in
the spoke of the wheel, the bolt being provided with a nut on its outer end having
a wrench handle 53 whereby the parts are clamped together. Washers on the
bolt 51 are interposed between the pitman and spoke of the wheel and the nut 53
respectively, to provide for the movement of the pitman on the wrist. A
segmental plate 54, rigid on the arm A', receives the bearing of a flattened portion
of the vibrating arm 48, and steadies its motion. An oil cup 55 supplies oil to the
connection between the arm A' and the vibrating arm 48 for the lubrication
thereof. A rod, consisting of two members 56, 561, connects the free extremity of
the vibrating arm 48 to the carriage 10. The member 56' is furcate and is swivelled
on the member 56 at an angle thereto. The member 56' is pivotted in a ball 57
(Figures 3 and 4) by means of the laterally disposed set screws 58, and the
ball 57 is pivotted in a boss or lug 59 integral with the sleeve 10, by means of
vertically arranged centres 60, whereby a universal joint is formed. The rear
extremity of the member 56 is similarly connected to the free extremity of the
vibrating arm 48 by a universal joint, the furcate ends of the member 56 being
pivotted to an interposed ball by horizontally arranged screw threaded centering
pins 61, and the ball being pivotted in the arm 48 by vertically arranged centering
pins 62.
An adjustment of the member 56' on the member 56 longitudinally thereof is
provided for, in and by a sleeve 63 revolubly loose on the member 56, on which it
is prevented from movement end wise by bearing at one end against a shoulder and
at the other end by the nuts 64 turning on the member 56. The member 56' is
provided with a suitable eye therefor and fits loosely on the sleeve 63, being held
to revolution therewith while adjustable longitudinally thereof, by a pin 65 fixed
in the member 56', which pin projects iuto a longitudinal groove therefor in the
sleeve 63. Set nuts 66, one on either side of the member 561, turn by screw thread
on the sleeve 63, and are adapted for adjusting the member 56¹ along the
member 56.
From the foregoing description, it will be understood that a polisher being
reciprocated by the mechanism described therefor, will reciprocally traverse the
surface of an article supported on the table or car, and that the car, being moved
to right or left, will bring every portion of the surface of the article beneath the

page_text: polisher, so that its entire upper surface or sides may be polished completely by
the machine; and that the operative parts of the mechanism are so supported and
balanced that but little effort is required on the part of the operator to control and
properly manipulate the polisher for these purposes.
Having now particularly described and ascertained the nature of the said inven-
tion 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 :-
1. In a machine of the character described, the combination of a standard or
frame a guide bar pivotted on the standard and capable of being swung vertically,
a driving shaft mounted in the standard, a vibrating arm pivotted on the standard,
a pitman connecting the vibrating arm to a crank on the driving shaft, a recipro-
cating polisher carriage on the guide bar and a rod connecting the carriage to the
free extremity of the vibrating arm, substantially as described.
2. In a machine of the character described, the combination of a standard or
frame, a driving shaft mounted in the standard, a fly wheel fixed on the shaft, a
vibrating arm pivotted on and suspended from the standard, and a pitman
connecting the vibrating arm medially to a wrist pin on the fly wheel and a
reciprocating polisher carriage connected directly to the extremity of the vibrating
arm, substantially as described.
3. In a machine of the character described, the combination of a standard
having an overhanging and laterally deflected arm, a shaft mounted in and
transversely of the standard, a fly wheel on the shaft at one side of the standard,
a vibrating arm pivotted on the deflected extremity of the standard and pendent
therefrom in the vertical plane of the fly wheel, and a pitman connecting the
vibrating arm medially to the wrist pin of the fly wheel, substantially as
described.
4. In a machine of the character described, the combination of a standard
having an overhanging and laterally deflected arm, a shaft mounted in and
transversely of the standard, a fly wheel on the shaft at one side of the standard,
a vibrating arm pivotted on the deflected extremity of the standard and pendent
therefrom, a vertically disposed bearing plate 54 rigid to the standard and adapted
to bear against and guide the vibrating arm, and a pitman connecting the vibrating
arm to the wrist pin of the fly wheel, substantially as described.
5. In a machine of the character described, the combination of a standard, a fly
wheel journalled on the standarde a vibrating arm pivotted on and pendent from
the standard, a medial truss on the vibrating arm projecting laterally therefrom
on the side opposite to the fly wheel, and a pitman connecting a wrist pin on the
fly wheel to a distant part of the truss, substantially as described.
6. In a polishing machine, the combination of a vibrating arm, a polisher
carriage and a rod (connecting the carriage to the arm) consisting of two members
swivelled together, as described.
7. In a polishing machine, the combination of a vibrating arm, a polisher
carriage and a rod (connecting the carriage to the arm) consisting of two members
swivelled together, one of which members is arranged at an angle to the other
member, substantially as described.
8. In a polishing machine, the combination of a vibrating arm, a polisher
carriage, a connecting rod consisting of two members swivelled together, and balls
or gimbals interposed between the ends of the rod and the vibrating arm and the
polisher carriage respectively, forming universal joints between them, substantially
as described.
9. In a polishing machine, the combination of a cylindrical guide bar having a
longitudinal groove therein, and a polisher carriage reciprocable thereon, the
carriage consisting chiefly of a sleeve and bearing brasses adjustable therein, one
of the brasses being provided with a feather which enters the groove in the guide
ba: and prevents rotation of the carriage thereon, substantially as described.
10. In a polishing machine, the combination of a substantially cylindrical

page_text: polisher carriage reciprocable on a guide bar, an adjustable block to which a
polisher block is attached, and means substantially as described for adjusting the
adjustable block circumferentially on the carriage.
11. In a polishing machine, the combination of a reciprocable polisher carriage,
a polisher block secured detachably to a head-block, said head-block secured
tiltably to an adjustable block, which last block is secured adjustably to the
carriage, substantially as described.
12. In a polishing machine, the combination of a reciprocable polisher carriage,
a polisher head-block mounted and tiltable laterally on the carriage, and a polisher-
block secured detachably to the head-block, substantially as described.
13. In a polishing machine, the combination of a reciprocable polisher carriage,
an adjustable block on the carriage, a polisher head-block provided with curved
bearings and a bolt holding the polisher head-block to the adjustable block tiltably,
substantially as described.
14. In a polishing machine, the combination of a standard, a yoke swivelled on
the standard, a guide bar pivotted medially in the yoke, a polisher carriage
reciprocable on an arm of the guide bar and an adjustable counterpoise on the
other arm of the bar, substantially as described.
15. In a polishing machine, the combination of a standard, a yoke swivelled on
the standard, a guide bar pivotted medially on the standard, a polisher carriage
reciprocable on one arm of the guide bar, a yoke adjustable on the other arm of
the guide bar, and weights pivotted and pendent on the yoke in pairs opposite each
other laterally, substantially as described.
16. In a polishing machine, the combination of a standard, a guide bar pivotted
medially on the standard, and a polisher carriage reciprocable on one arm of the
guide bar, a counterpoise on the other arm of the bar, and a stop fixed on the
standard adapted to engage and limit the oscillation of the bar, substantially as
described.
•
17. In a polishing machine, the combination, with a polisher carriage recipro-
cable horizontally, of a car adapted to support an article being polished, which
car includes wheels travelling on a track at a right angle to the motion of the
reciprocable polisher carriage, and cranked axles whereby the floor of the car is
let down between the wheels so as to bring the transverse rubbing strain of the
polisher on the article being polished down more nearly to the plane of the car
track, substantially as described.
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