Improvements in Boring Machines.
Year: 1894

page_text: Date of Application, 27th Nov., 1894-Accepted, 14th Sept., 1895
DI MULTICATION
Improvements in Boring Machines.
I, CHARLES CRISTADORO, of 791 Laurel Avenue St. Paul, in the County of
Ramsey, and State of Minnesota, United States of America, Manufacturer 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
-tatement :-
My invention relates to improvements in boring machines, its object being to
provide a mechanism by which any desired number of holes, in any desired relative
position, may be bored simultaneously.
To this end my invention consists of a horizontal, rectangular bed provided with
guides parallel with the several sides and supported on a suitable frame. In these
guides are adjustably arranged a series of clamps in which are adjustably secured
horizontal ums extending above the bed towards its centre and fitted with chucks
to receive augers or bits. Upon the spindles of the chucks are secured sheaves
carrying a belt connected to a source of power whereby all the bits are operated
simultaneously and at equal speed.
My invention further consists in the specific construction and combination herein-
after described and particularly pointed out in the claims.
In the accompanying drawings, forming part of this Specification, Figure 1 is a
plan view, and Figure 2 is a side elevation, of my improved machine.
In the drawings 2 represents the rectangular bed supported upon the frame A
and provided with guides or slots 3 parallel with the sides of the bed.
guides are adjustably secured the clamp blocks 4 in any desired manner, as by
In these
means of set screws 5 engaging the under side of the bed. These clamps have
cylindrical openings to receive arms 6, the blocks being split, as shewn in Figure 2,
and adapted to be closed together by means of the screw 7, thereby clamping the
members tightly upon the arms. These arms extend at right angles to the guides
in which the respective blocks are secured, one end being fitted with a yoke 8 in
which is journalled the vertical spindle 9 fitted with the sheave 10 and provided
with bit chuck 34 adapted to receive the auger or bit 11 in the ordinary manner.
12 is a driving shaft connected to a suitable source of power and fitted with the
driving pulley 13. The belt 14 runs from the driving pulley around the several
sheaves 10 and the sliding sheave 15. This sheave is mounted upon a block 16
which works in a guide upon the arm 17 under the tension of the cord 18 running
from the block over the sheave 33 and supporting the weight 19 by means of which
um'orm tension of the belt 14 is secured. Underneath the series of bits is
airauged a table B provided with the transverse guide 20 and longitudinal
guide 21 along which are adjustably secured the stops 22 and 23. These stops are
arranged at right angles with each other, as shewn, and so adjusted as to hold a
box or piece of stock 24 laid upon the table and bearing against the stops in
position to be bored. The table B is supported by the cross bars 25 and 26 fitted
to the vertical guides 27. The cross bars are adjustably connected together by
means of the hand screw 28 having a bearing in one and threaded through the
other, whereby the height to which the table can be lifted may be varied at will.
To the cross bar 26 are connected the levers 29 which have their pivot fulcrum on
the cross bar 30, their power ends being connected to the treadle 31.
depressing the treadle the table is lifted carrying the stock laid upon it against the
By
ID017

page_text: bits 11, the depth of the holes bored being determined by the adjustment above
described.
In order to force the stock off the bits after being bored I provide a small frame
or plate 35 supported centrally over the table by means of the spring arms 36
secured to the frame and adapted to bear upon the stock when lifted by the
table.
OPERATION.
The stops 22 and 23 are first set for the required size of box or stock and the
distance between the cross bars 25 and 26 adjusted for the height of the same and
the depth of holes to be bored. The box with its lid is then laid upon the table
underneath the frame 35 and against the stops, as shewn in Figure 1, and the
requisite number of bits advanced and secured in position over its edges. Power
is then applied to drive the belt and the treadle is depressed carrying the table
upwards against the tension of the springs 36 and with it the box laid thereon, the
bits boring holes of required depth therein. Upon releasing the treadle the table
drops, carrying with it the box, the springs 36 assisting in clearing the box from
the bits which can then be removed and another substituted therefor, the operation
being repeated, and the parts can in a few minutes be readjusted to adapt them to
any other size of box.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination of the bits, each independently laterally adjustable in both
directions, the stock holder adjustable to different sizes of stock, and means for
moving one of said parts a predetermined distance towards the other.
2. The combination, with the bits, each independently laterally adjustable in
both directions, of the table movable to and from the same, substantially as
described.
3. The combination of bits, each independently laterally adjustable in both
directions, the support adjustably movable to and from the said bits, and the
laterally adjustable stops upon said support, substantially as described.
4. The combination of bits, each independently laterally adjustable in both
directions, means for operating them simultaneously, and means adjustable to
different sizes of stock for carrying the stock against said bits, substantially as
described.
5. The combination of bits, each independently laterally adjustable, means for
simultaneously operating the same, adjustable stock-holding devices, and means for
driving said bits into said stock to a limited depth, sub-tantially as describe 1.
6. The combination of parallel bits, each independently laterally adjustable in
both directions, common means for simultaneously operating the same, the stock
support adjustable to various sizes of stock, means for adjusting the normal
distance between said support and said bits, and means for moving one towards and
from the other, substantially as described.
7. The combination of the stock support, devices carried thereby for holding
different sizes of stock, the gang of bits independently adjustable in a horizontal
plane, means for driving them simultaneously, means for bringing the stock and
bits together, and means for limiting the depth of cut of the bits, substantially as
described.
8. In a device of the class described, the combination, with the horizontal
vertically movable table provided with adjustable stops, of a series of bits arranged
above said table, means for adjusting each of them laterally in both directions, and
common means for operating them simultaneously, substantially as described.
9. In a device of the class described, the combination, with the rectangular
trame, of the horizontal vertically movable table arranged therein. the laterally
adjustable stops upon the surface of said table, the bit chucks mounted in bearings

page_text: above said table, means for laterally adjusting the position of each of the same
independently in both directions, and means for simultaneously rotating the sime,
substantially as de-cribed.
10. In a device of the class described, the combination, with the horizontal
rectangular frame, of the guides parallel with the respective sides thereof, the
horizontal vertically movable table arranged within said frame, the laterally
adjustable stops upon said table, the clamping blocks independently adjustable
along said guides, the bit carrying arm adjustable in each of said blocks, the bit
chucks carried by said arms, and means for simultaneously rotating said chucks,
substantially as described.
11. The combination, with a suitable support, of the horizontal vertically
movable table, the series of vertical bits supported above said table, means for
laterally adjusting the position of each of said bits in both directions, and means
for simultaneously rotating the same, substantially as described.
12. In a device of the class described, the combination, with the rectangular
horizontal frame, the guides upon the sides of said traine and parallel therewith,
the horizontal table vertically movable within said frame, the clamps independently
adjustable along said guides, the arm adjustably secured in each of said clamps at
right angles with said guides, the bit chucks mounted in bearings upon the inner
ends of said arms, the sheaves upon the spindles of said chucks, the belt running
upon said sheaves and provided with a belt tightener, and a driving pulley therefor
connected to a suitable source of power, substantially as described.
13. The combination, with the horizontal rectangular bed, of the guides
adjacent to the sides of said bed and parallel therewith, the horizontal arms
adjustably secured at right angles with said guides in supports adjustable along
said guides, the bit chucks mounted upon the inner ends of said arms, the pulleys
connected to said chucks, the common driving belt for said pulleys, and the driving
pulley and belt tightening pulley for said belt, substantially as described.
14. The combination, with the frame having a horizontal rectangular bed, of
the guides parallel with the sides of the said bed, the table arranged centrally
in said bed and movable upon vertical guides, the treadle levers for operating said
table, the laterally adjustable stops upon said table, the series of independently
laterally adjustable vertical bits above said table, and means for simultaneously
operating the same, substantially as described.
Dated this 27th day of November 1894.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.