Improvements in or relating to Brakes and Automatic Stopping Mechanism for File-cutting Machines.
Year: 1889

page_text: Date of Application, 2nd Dec., 1889
Complete Specification Left, 1st Sept., 1890-Accepted, 4th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in or relating to Brakes and Automatic Stopping
Mechanism for File-cutting Machines.
We, RICHARD DENISON of the Sydenham Works Holbeck, Leeds in the County of
York, Engineer, and JOHN BLAKEY, of 44 Lady Lane, Leeds aforesaid Boot and Shoe
Manufacturer do hereby declare the nature of this invention to be as follows:-
This invention relates to brakes and automatic stopping mechanism that may be
applied to file cutting machines having a sliding bed and fly wheel and it is
particularly applicable to machines such as are described in the Specification
of Letters Patent granted to the said Richard Denison the First day of May 1886
No. 5935.
According to this invention, to the side of the sliding bed of the aforesaid machine
may be attached an adjustable cam or tappet piece or projection which is set to come,
during the traverse of the bed, in contact with a spring pin carried in suitable
bearings on the bed of the machine. One end of the spring pin is attached to the end
of a horizontal bent or curved lever (which is also pivoted to the bed of the machine)
whilst its free end is provided with a hook or catch. To the hand lever of the belt
fork mechanism may be pivoted or hinged a spring or lever armed at its lower end
with a projection or pin with which the book of the bent or curved lever engages.
To the hand lever when required may be added a heel or end piece to which a spiral
or other spring may be attached for drawing the lever over when it is required to
throw the belt onto the loose pulley as soon as the hand lever is released from the
hooked end of the bent or curved lever.
Directly under the fly wheel of the hereinbefore mentioned machine may be
mounted vertically in suitable bearings a brake (composed of hard wood or other
suitable material) capable of being raised and lowered by an eccentric, cam, or its
equivalent mounted and fixed on the horizontal shaft of the belt fork mechanism.
As soon as the hereinbefore mentioned tappet or cam piece, during the traverse of
the sliding bed of the machine to which it is adjustably fixed, comes in contact
with the spring pin one end of the bent or curved lever is thereby depressed at the
same time the hooked end is raised and releases its hold of the projection attached to
lever, pivoted to the hand lever, which is then drawn over by the spiral or other spring
for throwing the belt on to the loose pulley. At the same time the horizontal shaft
to which the hand lever is attached is partially rotated in its bearings, and by means
of the eccentric or cam the brake block is raised and comes in contact with the
periphery of the fly wheel thereby immediately stopping the machine.
But should the chisel in any way become "snipped" or damaged before the
adjustable tappet piece has reached the spring pin, the lever pivoted or hinged to the
hand lever may be pressed inwards drawing the catch out of gear with the hooked end
of the bent or curved lever thereby permitting of the hand lever to be drawn over by
the spring for throwing the belt onto the loose pulley and bringing the brake into
action as previously described.
The above brake and automatic stopping motion is particularly applicable to the
above described file cutting machines and may be used either separately or together in
combination with such machines as well as with other file cutting machines having a
fly wheel and sliding bed.
Dated this Thirtieth day of November 1889.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Brakes and Automatic Stopping
Mechanism for File-cutting Machines.
We, RICHARD DENISON, of the Sydenham Works, Holbeck, Leeds, in the County
of York, Engineer, and JOHN BLAKEY, of 44 Lady Lane, Leeds aforesaid, Boot and
Shoe Manufacturer, 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 brakes and automatic stopping mechanism that may be
applied to file cutting machines having a sliding bed and fly wheel; and it is
particularly applicable to machines such as are described in the Specification of Letters
Patent granted to the said Richard Denison the First day of May A.D. 1886
No. 5935.
In the drawings:
:-
Figure 1 is a part side elevation, Fig. 2. a part end elevation, and Fig. 3. a part
plan of a file cutting machine with our invention applied. Fig. 4. a part end eleva-
tion shewing the connection between the brake actuating mechanism and the belt fork.
Figs. 5, 6, and 7 are respectively a side elevation, end elevation and a plan of a detail.
In the drawings the brake and automatic stopping motion are shown applied to such
parts of a file cutting machine (of a similar construction to that described and
illustrated in the herein before named Specification) as are necessary to illustrate their
application and combination; but we would have it understood that the brake and
stopping motion may be used separately or in combination with such machines, as well
with other constructions of file cutting machines having a sliding bed and fly wheel.
A is the bed of the machine having arms a a' projecting from its opposite ends.
B the moveable bed which slides upon the bed A, and it is provided with a
trough b in which the anvil boscillates. CC are the standards provided with bearings
for receiving the adjustable head and chisel operating mechanism, not shown in the
drawings. E E' are fast and loose pulleys mounted on the cam shaft F, on which
shaft is also keyed the fly wheel S. T is the belt fork to which a sliding motion is
imparted (as hereafter described) from hand lever T¹ through shaft T, carried in
bearings T fixed to bed A, lever T4, connecting link T5 jointed respectively to lever T
and the sliding bracket T-mounted upon the arm of bracket T-in or to which the
prongs of the belt fork are fixed.
All the above parts may be of a similar construction and operate in the same
manner as described in the above named Specification.
According to our invention to the sliding bed B-preferably, though not necessarily
so, the side furthest from the driving pulley E-is attached the tappet piece I provided
with a slot hole i to enable it to be adjusted in a longitudinal direction and afterwards
fixed in position by set screws . The end is curved to form a cam.
The tappet
piece I is set to come in contact, during the traverse of the bed B, with a spherical
headed pin J mounted in suitable bearings j fixed to or cast on the extension arm a.
A helical (or other) spring j1 may be arranged to encircle (or act upon) the pin J for
returning it to the position shown in the drawings after being depressed by the cam
end of the tappet piece. The lower end of the pin J may be attached to (as shown)
or arranged to rest upon the upper surface of the heel k of a curved lever K (which is
pivoted at k to the bed A) whilst its free or front end k¹ is shaped to form a hook
for the purposes to be hereafter described. When the lower end of pin J is
arranged to rest upon the upper surface of heel ka spring will be required for raising
the lever K after it has been acted upon by the cam i² and pin J.
To the face of hand lever T' is jointed at ta spring lever L armed at or near its
lower end with a pin 7 preferably though not necessarily so, rectangular in shape. The
pin projects from the lever L at or about a right angle, and it is made to pass
through a hole in the hand lever T¹ to a suitable distance beyond its inner face to
enable the hooked end of curved lever K to engage with it for retaining the belt on

page_text: driving pulley E. To the hand lever T¹ is also added the heel piece t² to which is
connected one end of the helical spring t³, attached at its other end to the bed A,
and employed for drawing the lever over in the direction of arrow as soon as the
hook k releases its hold of the pin l. When the lever is drawn over the required
motion for moving the belt on to the loose pulley E' is imparted to the fork T through
shaft T2, lever T, connecting link T and sliding bracket T*.
In order to throw the belt on to the loose pulley as soon as the bed B has been
traversed the length of the file blank being operated upon the tappet piece I is
adjusted on the side of the bed B that its curved end shall press the pin J down-
wards thereby raising the hooked end k¹ of lever K clear of pin 7. When this is done
the spring draws the hand lever T¹ over and at the same time the shaft T2 (on
which hand lever T¹ is fixed) is partially rotated for moving the belt as previously
described on to the loose pulley E. But should the chisel become damaged or
the machine require to be stopped before the end of the file blank is reached, the
attendant can at any time release the hand lever T¹ from its connection with the
hooked end k¹ of curved lever K by pressing the upper end of spring lever Linwards,
when the hand lever T¹ will be at once drawn over by the spring t³ as herein before
described.
The above described stopping motion may be used alone or in combination with a
brake N which is constructed and operated as follows:-
Below the periphery of the fly wheel rims is adjustably mounted on a vertical
spindle O (which is made to slide in bearing O¹) the brake block N formed of hard
wood or any other suitable material. The block N is screwed to a plate n of iron
which acts as a nut for the screwed end of spindle O and it is locked in position by a
second nut n. The lower end of the spindle O rests upon an eccentric P which is
mounted and keyed upon the shaft T2 in such a manner that when the shaft is
partially rotated as herein described and the belt moved onto the loose pulley E¹ the
eccentric will have raised the brake N into contact with the rim of the fly wheel for
more quickly stopping the machine. But as soon as the attendant presses the
handle T' over to bring it into position for engaging with the hook end k¹ of lever K
the eccentric will have been moved so as to allow the brake block N to fall clear
of the rim s.
In some cases a cam may be used in place of the eccentric, and the end of the
spindle O allowed to rest upon the shaft T2 when the brake is not in operation.
A pointer Q and indicator or guage R marked with a scale may sometimes be used
for setting the anvil 6' to any required angle.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. The application and use in file cutting machines such as herein described of an
adjustable tappet piece such as I, attached to the side of the sliding bed for automati-
cally stopping the machine by means of a spherical headed spring pin such as J,
hooked ended lever such as K, spring lever such as L, spring such as t³ in combination
with the belt fork T and mechanism for actuating the same substantially as set forth.
2. The application and use in file cutting machines such as herein described of the
brake and means for actuating the same in combination with the herein described
automatic stopping mechanism substantially as set forth.
3. In file cutting machines such as herein described the construction of apparatus
shown in the drawings for automatically applying the brake and stopping the machine
in any portion of the traverse of the sliding bed.
Dated this Thirtieth day of August 1890.
RICHARD DENISON.
JOHN BLAKEY.
By W. Fairburn-Hart
Agent.