Improvements in Dovetailing Machines.
Year: 1894

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Date of Application, 30th June, 1894
Complete Specification Left, 27th Aug., 1894-Accepted, 29th Sept., 1894
Improvements in Dovetailing Machines.
JOHN ANDERSON Pottery Lane Newcastle-on-Tyne Engineer do hereby
declare the nature of this invention to be as follows:-
This invention consists of a frame carrying a vertical revolving spindle holding
the cutter. The top of the frame carries a sliding table provided with a lateral
slide or carrier in which the wood is fixed at right angles so that when the cutter
passes through the side wood into the end wood, thus finishing one corner of a box
at each operation, all the motion being obtained from an horizontal shaft gearing
in to a vertical, which has a crank working an eccentric cam connected by a rod to
the sliding table, thus imparting a gradual motion up to the cutter by half the
revolution of the crank, and withdraws by the second half, and at the same time
by means of cams and pawls giving the carrier a lateral impulse preparatory for
the next cut, this being repeated until the distance is complete.
Dated this 29th day of June 1894
JOHN ANDERSON.
COMPLETE STETICATION.
Improvements in Dovetailing Machines.
JOHN ANDERSON Pottery Lane Newcastle-on-Tyne 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 :-
This invention relates to machines with one or several revolving spindles with
cutters for making dovetails in cabinet and joinery work, the main feature being
the arrangement of the movements which are placed in the most accessible position
for adjustment, and out of the reach of shavings and other refuse thus obviating
all risk of the movements being choaked or broken, also being more compact takes
up less space than other machines in use for the same purpose.
The invention may be described as follows, reference being had to the letters
and figures upon the accompanying drawings.
Fig. 1. is a side elevation showing section of carrier B. with the wood A. in
position for operation dotted line L shows position of the revolving spindles
carrying the cutter. Fig. 2. is a back clevation. Fig. 3. a plan.
The wood A is secured in the carrier B. between adjustable gauge stops B¹―B²
the whole having a lateral travel upon table C which also has a traverse or a traverse
or reciprocating motion upon the frame imparted by the speed cone D. upon the
shaft E. having a worm F. gearing into wheel G. secured to the vertical shaft H.
which is provided with crank I. at the top end, which operates cam J. and it being
connected by rod K. to dovetail table C. so that each revolution of shaft H. moves
table C. with carrier B. containing the wood A. up to the cutter and at a certain
point of withdrawal. The cam M. acting upon lever O. which is pivoted at 01
releases pawl P. from the carrier rack B³ and at the same time the lever Q moved
by cam N. pushes the slide block R. to the right, and the lever S. engaging the
carrier rack is carried forward by a stud in slot T. thus the job is moved one space
for the next cut in succession until the traverse is complete, line L. representing
D7

page_text: the spindle which is driven by belt from a countershaft situated in a convenient
position from the machine, this also propels shaft E. with its various connections.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
First. The arrangement whereby the horizontal wood operated upon extends
toward the countershaft.
Second. The vertical shaft H. cam J. rod K. block R. and levers O. and Q with
the pawls.
Thirdly. The adjustable gauge stops B1-B2 in the carrier substantially as
shown and for the purpose set forth or any mere modification.
Dated this 25th day of August 1894.
JOHN ANDERSON.