Improvements in Brush Block Boring Machinery.
Year: 1889

page_text: Date of Application, 23rd July, 1889-Accepted, 21st Sept., 1889
COMPLETE SPECIFICATION.
Improvements in Brush Block Boring Machinery.
1, ANDREW HOUSTOUN MORIER, of 145 Argyle Street, in the City of Glasgow, in
the County of Lanark, North Britain, Brush Manufacturer, do hereby declare the
nature of this invention, (which has been communicated to me from abroad by
John Conway Murphy, of Brooklyn, New York, United States of America,
Gentleman,) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The said machinery is designed for boring the perpendicular and slanting holes in
brush blocks; and, as many holes may be bored at the same time, the machines aro
known as multiple boring machines.
The said invention chiefly consists
First. In the construction and combination of four operating shafts, four recessed
disks secured to the shaft, a bit driver provided with four journals which fit in the
recesses in the disks, the crank carrier which is secured to the bit driver, the boring
plates and the bits as hereinafter described.
The chief object of this part of said invention is to dispense with the use of two
cranks which have heretofore been necessary in this class of machines, for operating
the bit driver, by substituting therefor a metallic bit driver which is provided with
four journals and to which the crank carrier is rigidly secured whereby an even
reciprocating movement is given to the crank carrier.
Second. In the construction and combination of a stationary shaft and two revolving
bevelled wheels mounted thereon and provided with driving pulleys, with two sets of
spindles, pinions attached thereto, and boring rods which are attached at the end of
the spindles, the two sets of rods being placed at different angles as hereinafter
described.
The chief object of this part of said invention is to avoid the strain brought to hear
upon the drill rods in boring the two outside rows of holes in a brush block, the two
rows of holes being placed at an angle to each other, and to operate the two sets of
drill rods by two separate driving wheels.
In the accompanying drawings making a part of this specification
Figure 1, is a side elevation of a boring machine, partly in section.
Figure 2, is a detached view of the bit driver and the disks by which it is
operated.
Figure 8, is a vertical section of the bit driver, the crank carrier, and the journals
through which the boring rods pass.
Figure 4, is a side elevation of a machine of a modified construction.
Figure 5, is a vertical section of the same taken on the line a, a, of Figure 4, and
Figure 6, is a vertical section taken on the line y, y, of Figure 4.
In Figures 1, 2, and 3,
A represents a suitable supporting frame: B. the driving pulley through which
the other parts of the machine are operated. This pulley B. is placed upon the outer
end of the shaft C which is journaled in suitable bearings, and to which the operating
wheel is secured. Meshing with this wheel D, are four other wheels of the same
size which are secured to the shafts F which are journaled in suitable bearings pre-
pared to receive them, and secured to the inner ends of these shafts F. are the
disks G, which have the eccentric recesses H, formed in them. When motion is
imparted to the wheel D, through the pulley B, and shaft C, the shafts F. and disks G,
are caused to revolve by the wheels E. Between the disks G, and journal board
holder K. is placed the bit driver L, which is formed in a single casting or plate as
shown, and which is provided with a journal M, at each of its corners, and these
journals M. fit in the eccentric recesses H, formed in the disks G. This bit driver is

page_text: provided with flanges 0 around three of its edges, and with the lugs P, at its top,
inrough which the set screws Q are passed. The crank carrier K is placed between
the flanges and lugs P, and.held rigidly in position by means of the set screws Q.
The four journals impart to the bit driver and crank holder an even steady movement
which cannot be imparted by means of the two cranks which have heretofore been
used for this purpose. Where cranks are used a jerk is given to the crank holder at
each reciprocation, and this jerk soon causes the crank carrier and journal boards to
split, when the machine becomes inoperative at once. The great trouble experienced
from this source will be better understood when it is stated that sometimes the crank
carrier and journal boards do not last more than a few hours. By using four journals,
as here shown, all of this jerking movement is done away with and the crank carrier
and journal board being relieved of all strain, will last almost indefinitely. The journal
boards are held in the holder K, as shown, and can be adjusted at the will of the
operator. The brush block is placed in a holder T, which is caused to reciprocate
upon the frame by means of the toggle joint U, which is connected to the spring
actuated treadle V, in the usual manner. The toggle joint is here used so that when
the holder T is forced forward it is held rigidly in position so that there can be no̟
action or spring while the bits are boring the block.
In Figures 4, 5 and 6 which illustrate a machine of a modified construction,
A represents a frame of any desired construction, in which the stationary grooved
shaft B, is rigidly held in a horizontal position. This shaft B is provided with a
groove C, which extends from one end to the other, so that the operating parts can be
freely adjusted at the will of the operator. Suspended upon this shaft is the journal
plate D, which is shaped as shown. (Figure 2,) provided with a hub through which
the shaft B, passes, and having a thickened edge or flange extending around it, so as
This
to form journals or bearings for the spindles E, provided with the pinious e
journal plate D is placed in close proximity to the large bevelled driving wheel F,
which revolves freely upon the shaft B, and which is provided with the driving
pulley G, upon one side s0 as to be driven by the belt H. Each one of the
spindles E, is supported at its rear end in the journal plate D, and has its middle or
central portion supported by a second journal plate 1, which is also hung upon the
shaft B. but which plate 1. is somewhat smaller than the one D. The spindles E, pass
through the outer edge of the plate I, outside of the second or inner row of spindles J.
which have their rear ends journaled in the plate I, but their journals are placed inside
of the bearings of the spindles E. Pladed upon the shaft B, next to the journal
plate I, is a second but smaller bevelled operating wheel L. which is also provided
with a driving pulley N, which is operated by a belt 0. This wheel meshes with a
second series of pinions N¹, upon the inner set of spindles J. for the purpose of causing
these spindles to revolve at the same time and in the same direction as the ones E.
The front ends of the spindles J, are supported in a journal plate P, which is also
secured to the shaft B, and in which plate the spindles revolve. Two sets of
spindles E, J, extend at different angles to each other so that the two sets of boring
rods Q, R, shall extend at different angles through the form board S. The boring
rods Q, bore the outer row of holes in the brush block T, and at one angle, while the
second and inner sets of rods 1, bore the inside row at a different angle.
The form board S, and the block holder U, are fastened to the sliding plate V, at
their lower ends and this plate is made to reciprocate upon the top of the table W. by
means of an L-shaped lever X, which is connected to the spring actuated treadle Y,
by a connecting rod Z. When the treadle is depressed the lever X, forces the plate V.
with all of its attachments endwise, and thus causes the form board S. to move
backward over the boring rods at the same time that the brush block T, is forced upon
them.
Heretofore it has not been found practicable to use the boring rods Q, R, at such an
angle as is necessary to hore tlie outer rows of holes in brush blocks, owing to the
great amount of strain and breakage caused by bending the boring rods out of
line. By journaling the spindles in journal plates at about the angle at which the
holes are to be bored, and providing them with pinions which extend at a suitable

page_text: angle to the driving wheels F, L, it will be seen that the boring rods are deflected
but very little out of a straight line, and hence a very slight strain is brought to
bear upon them. By making one journal plate smaller than the other, the spindles
are arranged in concentric circles, and thus the boring rods can be placed at
different angles without interfering with each other, or causing any unnecessary
wear upon any of the operating parts.
Having now particularly described and ascertained the nature of my said iu-
vention, and in what manner the same is to be performed, I declare that what I
claim is
1. The combination of the driving shaft provided with a driving wheel, the four
shafts provided with wheels which mesh with the driving wheel, the recessed disks
secured to the ends of the shafts, and the bit driver provided with journals which
fit in the recesses in the disks, substantially as set forth.
2. A bit driver provided with a journal at each of its corners, and with the
flanges Q, lugs 1', and set screws Q, substantially as set forth.
3. The combination of the shafts F provided with operating wheels E, and the
driving shaft provided with a driving wheel for operating the wheels E, the disks G,
provided with eccentric recesses H, and the bit driver provided with a journal at
each of its corners, crank carrier, the boring rods, the journal plates, and a
mechanism for presenting the brush block to the bits, substantially as set forth.
4. In a boring machine, the combination of two concentric sets of spindles provided
with operating pinions, the boring rods connected to the spindles, the operating wheels
of unequal size, the journal plates of unequal sizes, the shaft upon which the journal
plates are placed, a form through which the points of the boring rods pass, and the
operating mechanism for presenting the blocks to the bits, substantially as shown.
5. In a boring machine, the combination of two sets of spindles, one placed inside
of the other, operating mechanisms for driving them, the boring rods connected to the
spindles, and the forin board, whereby the two sets of boring rods are operated at
different angles, substantially as descritted.
6. The combination of the stationary shaft, the three journal plates D, 1, 1, placed
thereon, the two operating wheels F. L. provided with pulleys, the two concentric sets
of spindles journaled in the journal plates and provided with pinions to engage with
the operating wheels, the boring rods, the form board, and a mechanism for presenting
the brush block to the bits, substantially as set forth.
Dafed this 23rd day of July LS89
HERBERT J. ALLISON,
Agent for the Applicant.