Improvements in Machines for Planing Metals.
Year: 1894

page_text: Date of Application, 18th Jan., 1894
Complete Specification Left, 18th Oct., 1894-Accepted, 24th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Machines for Planing Metals.
WILLIAM BENTLEY 122 Westfield Road, Leeds, Engineering Draughtsman,
do hereby declare the nature of this invention to be as follows :—
Whereas in most belt driven planing machines as at present constructed the
attendant when requiring to stop & start the table, (or in plate-edge planers the
tool-carriage), in the middle or any part of the stroke before the tappets operate,
cannot readily do this without also moving the feed gear, & advancing the tool
which is not desirable, I employ a starting & stopping lever (hereafter called in
this Application a starting lever) made so that the feed lever oscillates on a turned
socket cast or forged on the fulcrum of the starting lever. The feed lever is
formed with a one-notch sector on one side of its fulcrum, & is engaged with the
starting lever by a steel detent carried in a slot in the starting lever, but forced
into the notch on feed lever by a spring so arranged that the workman pressing a
small handle conveniently placed on the handle of the starting lever, thereby
withdraws the detent from the feed lever, so that the feed gear rests, although the
starting lever be moved through its full swing.
Dated this 17th day of January 1894.
COMPLETE SPECIFICATION.
Improvements in Machines for Planing Metals.
WILLIAM BENTLEY 122 Westfield Road, Leeds, Engineering Draughtsman
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:-
Whereas in most metal-planing machines as at present constructed the attendant
when occasionally requiring to stop and re-start the table, or in plate-edge planers the
tool-carriage, in the middle or any part of the stroke before the tappets operate,
cannot readily do this without also operating the feed-gear, and advancing the tool,
which may sometimes spoil the work, I employ a hand-lever constructed so as to
be capable of starting, stopping or reversing the machine without affecting the feed
gear, whenever an advance of the tool would be in danger of spoiling the work.
In order to show how I do this, reference may be made to the accompanying two
sheets of drawings.
Fig. 1 is the plan and Fig. 2 the front elevation of the driving end of a plate-edge
planing machine, carrying two tools cutting opposite ways.
B is the bed shown broken for convenience, C is the travelling saddle, actuated
in the usual manner by a longitudinal driving screw and pullies P with open aud
cross belts, which are shifted by forks, lever L, tappets T on twisting shaft S (only
one tappet shown) the said tappets T being alternately raised and depressed by
inclined planes A1, A2 on saddle C.
The twisting motion imparted by A', A² to shaft S is (by means of bevel gears D
and shaft E), communicated to a hand lever H keyed on shaft E.
The hand-lever H has a boss or socket formed on it, the exterior of this socket
is turned and forms a bearing for a sector Q which has a slotted arm on one side of
the axis of shaft E. This slotted arm is connected by a link R to another slotted

page_text: lever M, which it oscillates. The lever M is keyed to a horizontal shaft N, which
by its circular alternate motion gives a continuous vertical feed to the tools,
through the reversed ratchets and other connexions usual in such machines. These
are indicated on the drawing.
The sector Q has a notch cut out of its edge, into which a catch t fitted to hand
lever H is forced by a springs, but the said catch can be withdrawn from notch
in sector Q by pressing the little handle h which operates the little leverand
rod rattached to the catch t.
The attendant pushing or pulling the hand lever H, and simultaneously pressing
the little hand h, can start, stop or reverse the tool carriage, without the fatigue of
working the feed-gear or the danger of putting in a cut when it is not required.
Fig. 3 is a plan and Fig. 4 a side elevation of a rack planing machine to which
the special reversing hand-lever is applied.
In this instance S is the reversing segment in one piece with the hand-lever H,
which is keyed on the shaft E. Beneath H and enveloping the shaft E is the
one-notch sector Q with its long socket passing through a fixing F.
To the low end of the socket of Qis keyed a lever, which by the link R and
lever M imparts a circular alternate motion to the vertical shaft N which is
connected with the feed gear on cross slide.
On the low end of shaft E is keyed a lever L which by link C and bell-crank X
gives motion to bar Y for shifting the belts on pullies P.
Thus as before by pressing the handle when working the hand lever H, the
attendant can start, stop, or reverse the table without the labour of working the
feed gear or risk of spoiling the work through setting in a cut at the wrong time.
Having described these arrangements and combinations I declare that I claim
The application to metal planing machines of the hand lever H with disengaging
catch t, springs, rod r, lever l, and small handle h, for enabling a workman to
start, stop, or reverse the tool-carriage or work-table with or without imparting
a feed traverse to the cutting tool.
Dated this 17th day of October 1894.
WILLIAM BENTLEY,
Applicant.