Improvement in the Skip Motion of Biscuit Machinery.
Year: 1890

page_text: Date of Application, 11th Sept., 1890
Complete Specification Left, 10th June, 1891-Accepted, 1st Aug., 1891
PROVISIONAL SPECIFICATION.
Improvement in the Skip Motion of Biscuit Machinery.
I, DAVID ESPLIN THOMSON, of Gillespie Street Works, Gilmore Place,
Edinburgh, in the County of Midlothian, North Britain, Engineer, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to simplify the adjustment of the skip motion of
the biscuit cutting machine.
I carry out my invention by driving the skip motion direct from the crank shaft,
and I make all the adjustments of the skip motion independent of the other
adjustments of the machine.
Dated this 10th day of September 1890.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
COMPLETE SPECIFICATION.
Improvement in the Skip Motion of Biscuit Machinery.
I, DAVID ESPLIN THOMSON, of Gillespie Street Works, Gilmore Place,
Edinburgh, North Britain, Engineer, do hereby declare the nature of this inven
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The object of my invention is to simplify the adjustment of the skip motion of
the biscuit cutting machine.
I carry out my invention by driving the skip motion direct from the crank shaft,
and I make all the adjustments of the skip motion independent of the other
adjustments of the machine.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended two explanatory sheets of drawings, in the several
figures of which corresponding parts are marked with the same letters of
reference.
Figure 1 is an elevation of the arrangement for actuating the skip motion of the
biscuit cutting machine.
Figure 2 is a plan.
The biscuit cutting machine is a large machine with many other parts which it is
not necessary to show, as this invention relates solely to the arrangement for
actuating the skip motion. The skip is a periodic motion which has to be given to
the carrier of the trays on which the dough after being cut is brought along from
the cutters.
According to my invention the skip motion is actuated from the crank shaft A
by mechanism which is independent of any of the other motions of the machine.
In carrying out my invention an eccentric or alternately a cam B is fitted to the
crank shaft and carries an eccentric strap C. This eccentric strap C is connected
to a rod D which is pivoted to a second rod E. The rod E is supported on
bearings F and G attached to the framework of the machine and is free to move.
backwards and forwards in the bearings. A third rod H is pivoted to and
supported at one end by the rod E, while its other end is fixed in a slot of the
arm I pivoted loosely on the axle J which drives the carrier of the trays. The
skip motion is given by the pawl K on the arm 1 acting on the projection or
tooth on the wheel L which is fixed to the axle J. As the crank shaft A
revolves with the eccentric a backward and forward motion is given to the rod D
71

page_text: and communicated by the intermediate rods E and H to the lower end of the
arm 1. The lower end of the bar I is thus kept moving backwards and forwards
with every revolution of the crank shaft and every time the tooth or projection
engages with the pawl K the axle J will be shut forward which will give the skip
to the trays whieli is desired. So long as the tooth is not acted on by the pawl K
the motion of the arm I will not interfere with the ordinary motion of the axle J.
The amount of skip can be regulated by the position in the slot of the end of the
rod H.
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
The mechanism for actuating the skip motion from the crank shaft independent
of any of the other motions of the machine, substantially as described.
Dated this 9th day of June 1891.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.