IMPROVEMENTS IN METAL PLANING MACHINES
Year: 1885

page_text: We, EDWARD PETER WALTER and HENRY CHARLES WALTER, both residing at
105 Cannon Street, Bridgeport in the County of Fairfield and State of Connecticut,
in the United States of America, Machinists, do hereby declare the nature of our
invention for " IMPROVEMENTS IN METAL PLANING MACHINES" and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement :-
Our invention relates to certain novel and useful improvements in machines for
planing metal and has for its object to impart motion from the driving pulleys to
the mechanism which effects the movements of the table by positive and uniform
means, while at the same time the arrangement of the pulleys may be more
convenient and all the unnecessary rattling noise common to planers done away
with.
Our invention also has for its object to provide means in a planing machine
whereby power may be transmitted with great facility and positiveness and
furthermore to greatly simplify the construction and application of said means
and with these ends in view our invention' consists in the details of construction
and combination of elements hereinafter fully described and then specifically
designated by the claims.
In order that those skilled in the art to which our invention appertains may
more fully understand its construction and operation we will proceed to describe
the same in detail referring by letter to the accompanying drawings in which
Fig. 1 is a horizontal section with the table broken away.
Fig. 2 a vertical cross section and
Fig. 3 a detail side elevation.
Similar letters denote like parts in the several figures.
Motion is communicated to the table by means of a spirally toothed pinion A
upon a shaft B crossing the bed diagonally said pinion gearing with a rack in the
table. This shaft we extend outward at the side of the machine and arrange ou
the extremity thereof a spur wheel C which gears with a spiral pinion D on the
shaft E. This shaft is preferably journaled so as to extend transversely to the line
of movement of the table, but it also may be located on the front of the machine
parallel to the line of movement of the table.
FF are loose pulleys mounted on either end of said shaft and G G are friction
disks mounted on and rigidly secured to the shaft outside of the pulleys so that it
will be readily understood that the face of the friction disks when the latter are
thrown against either of the loose pulleys will bend against said pulley and lock
the two by friction for the purpose presently explained.
His a bushing or bearing for the shaft B one end of which extends inside of the
franie of the machine and is threaded at I. J is a sleeve threaded internally and

page_text: running on the thread I The inner end of this sleeve forms a flange or shoulder K
which is placed between two collars L M secured to the shaft E. Secured to or
formed with the sleeve J is an arm or crank N to which is attached a connecting
rod O.
The other end of this rod is attached to the shipper P and it will therefore be
obvious that when the shipper is operated by the blocks QQ on the table the
sleeve J will be caused to revolve a portion of a revolution in either direction as
the case may be, which will cause it to travel on the threads I carrying with it the
shaft E say in the direction of the arrow Figs. 1 and 2 which will bring the disk GL
into contact with the pulley F or a washer a interposed between said disk and
pulley when the shaft will be caused to revolve with the pulley.
The resistance offered the spiral pinion D by the gear C in the starting said gear
will cause an end thrust of said pinion and its shaft in the direction of the arrow
which will tend to bind the driving disk G¹ more tightly against the pulley F¹ this
tendency will increase with the increase of load or resistance of the gear C and
will decrease in like manner with the decrease of resistance so that the friction
or bite between the disk and pulley will be only just enough to overcome the
resistance of the gear C.
Now when the table in its travel operates the shipper P in the opposite direction
from that above described, the sleeve J will be caused to travel in the opposite
direction of the arrow carrying with it the shaft E and disks G G which will
disengage the latter from the pulley F and engage the former with the pulley F
which revolving in the opposite direction of the pulley F¹ will reverse the shaft
an consequently the gear C and table.
By these means we are enabled to produce a machine working absolutely noiseless
due to the smooth and continuous rotation of the two spiral pinions and shafts,
without any vibrations such as is caused by the action of the common gear tooth
while at the same time the reciprocating table of the machine reverses in a very
short movement of table without shock or jar, so that the quality of the work will
be improved and no chatters will be produced while the speed of the return stroko
may be increased so as to largely increase the quality of work produced.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
what we claim is
1. The combination with a metal planer having an obliquely arranged shaft
provided with a spirally toothed pinion meshing with a rack in the table and a
spur wheel on its outer extremity, of a driving shaft having a spirally toothed
pinion meshing with said spur wheel substantially as shown and described.
2. The combination with a metal planer having an obliquely arranged shaft
provided with a spirally toothed pinion meshing with a rack in the table and a
spur wheel on the outer extremity of said shaft meshing with a spirally.toothed
pinion on a driving shaft, of a shaft capable of a longitudinal movement in its
bearings and having rigidly secured thereto disks and loosely arranged thereon
pulleys, said disks and pulleys adapted to be thrown into engagement and a worm
which engages with a gear wheel secured on a primary shaft and means for
effecting an initial engagement between the disks and pulleys substantially as
set forth.