Improvements in Paper Box Machinery.
Year: 1895

page_text: Date of Application, 28th May, 1895-Accepted, 13th July,
1895
COMPLETE SPECIFICATION.
Communicated from abroad by LEROY W. BROWN, ALFRED BIRNIE, WILLIAM
PERKINS BIRNIE, and DONALD BIRNIE, all Manufacturers, of Brightwood,
near Springfield, Mass., U.S.A.]
Improvements in Paper Box Machinery.
1 JOHN WILLIAM MACKENZIE, of the Firm of Wheatley & Mackenzie,
Engineers and Patent Agents, of 40 Chancery Lane, London, 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 :-
The object of this invention is to produce a machine for making paper boxes of
a certain description as hereinafter set forth, which machine while not being
entirely automatic in all respects is of comparatively simple and inexpensive
construction and capable of performing the bending and satting operations upon
the side and end flaps and stay sections of the blank with the utmost efficiency.
In using this machine, the scored blank from which the box is to be made has
its Haps, which constitute the opposite sides of the box, bent up by hand, and
then introduced into the machine, which on being then set in motion gums the
blank at one end, turns in the stay sections at each end, and bends the corresponding
end flap at right angles to the part of the blank which constitutes the bottom and
causes the adhesion and setting of the end section to, and upon, the inturned stay
sections; the box is then, by hand, withdrawn and turned end for end and the
machine on being again set in motion repeats the aforementioned operations.
Another object of the invention is to so construct the machine that the operative
devices may be adjusted and adapted to boxes of different dimensions.
And the invention consists in constructions and combinations of parts, all
substantially as will hereinafter fully appear and be set forth in the claims.
Reference is to be had to the accompanying drawings in which the present
improvements are illustrated and in which :-
Figure 1 is a sectional elevation showing all of the principal operating parts of
the machine.
Figure 2 is a plan view of the machine with some of the more unimportant
upper parts of the machine broken away for clearer illustration of parts there-
below.
Figure 2 is a plan view of parts hereinafter particularly referred to.
Figure 3 is a front elevation of the machine with some parts in vertical section.
Figure 4 is a perspective view to especially show the form and arrangement of
some of the parts, more especially the gumming mechanism and the devices which
turn in the stay sections.
Figure 5 is a perspective view showing the adjustable support for one of the
stay-turning devices.
Figure 6 is a perspective view to illustrate the flap and stay-inturning devices
as in their operating relations to the corresponding portions of the box-blank.
Figure 7 is a perspective view showing the devices as having partially inturned
the end section and stay sections at the end of the box.
Figure 8 is a perspective view particularly showing the co-operation of the
follower which sets the inturned parts, with the devices which turn in the said parts
and the fixed parts on, or against, which the work is performed.
Figure 9 is a plan view of the blank from which,the box is to be made.
Figure 10 shows the manner of seizing the blank and bending in the side flaps
on which are the stay sections, ready for introduction into the machine.

page_text: Figure 11 is a perspective view of the completed paperboard-box as seen
looking into it.
Figure 12 is a perspective view of a part of the automatic unclutching mechanism
which ensures the stopping of the machine after one end-flap and stay section
inturning and setting operation.
Similar characters of reference indicate corresponding parts in all of the views.
Reference is first directed to the drawings in which the box-blank is variously
illustrated, and generally indicated by the letter, c.
Of this blank, the middle portion, 2, is to be termed the bottom section, the
portions,,, the end flaps, the portions, *, ¹, the side flaps, and the portions, .,.,
at the ends of the end flaps, the stay sections.
The dotted lines in Figure 9 represent the scoring, or lines of bending. In the
making of the box after the side flaps have been bent up at right angles to the
bottom section, the stay-sections are inturned into planes at right angles to the side
flaps, and then the gummed end-flaps are turned in upon and united to the stay-
sections.
In the drawings, A represents the bed or table of the machine which is in the
form of a massive bar or block extended in the manner of a cross-girder between,
and bolted to, the side standards which constitute the supporting legs, a, a, and
uprights, a³, a². At the front edge of this bed, A, are supported two forwardly
projected metallic blocks, or thick plates, or castings, B, with plane level tops, 20,
and with the opposite outer perpendicular faces, 22.
The separation of said opposite outer faces is to be the same as the width of
the box which is to be produced.
These blocks, B, which may be termed the blank-rests are the parts on and
against which the box-blank is presented and supported and with which co-operate
the inturning devices, C, for the stay-sections,, and the inturning devices, D,
for the end flap, and which withstand the pressure of the follower, G, which very
forcibly presses and sets the so-inturned portions of the blank.
The bed, A, has at its front face the large, deep, longitudinal groove, 24, and
near the bottom the forwardly standing ledge, 25. The blank-rests, B, B, are
connected, as a matter of preference and advantage, with the supports, C³, C,
for the stay-section inturning devices. Said rests, B, have angular or L-shaped
lugs or projections formed on or secured thereto. The member, 27, of each angular
projection of the rest, B, extends at and beyond the rear edge of the block, B, as
seen in Figures 1, 2, 5, 6, 7, and 8, while the other member, 31, of the angular
projection has its position alongside the outer face, 22, of rest, B, and is separated
from such face by a distance somewhat greater than the thickness of the card-board
from which the blanks are formed.
The support, C, is securely screwed or fitted to the member, 31, of the angular
projection and as seen in Figure 4 has the elevated part, or riser, 26.
This space, for the introduction of the blank,-between the face, 22, of rest, B,
and the proximate side of the support, C2, and part, 31, is clearly shown at y, in
Figures 24, 3, 5, 6, 7, and 8.
The bed has the horizontal slots, 29, 29, through which the said bolts pass, all
so that by said bolts and the nuts, 30, therefor, the rests, B, and supports, C2, may
be rigidly confined in any desired separated adjustment upon the so-slotted bed.
The aforesaid part, 27, fits in the longitudinal groove, 24, in the front of the bed, A.
The lower edges of the rests, B, may also have bearings upon the tops of the
aforementioned ledge, 25.
The combined rests, B, B, and supports, C³, C³, for the stay-section inturning
devices are engaged by a right-and-left-hand screw, 32, suitably journaled and
constrained against end wise movement and provided with the crank-handle, or other
adequate means for causing its rotation, through means of which, when the nuts
are loosened, to adjust to a nicety the said parts, B and C, which move as one
part.
Now, in each of the aforesaid risers, 26, are formed the transverse oblique

page_text: vay, 33, in which is fitted the slide, C, which constitutes the stay-section inturning
levice, and the way, 34, extending fore-and-aft and deeper than the way, 33, in
which slides the bar, 35, which carries the stud, 36, which impinges in the cam-
lot, 37, of the stay inturner so that, duly, the proper transverse movements may
be imparted to the sliding device, C.
The actuating motion is imparted to the bar, 35, by means as follows:
The cam, 40, on the main-shaft, F, together with the thrust-rod, 42, and
corresponding springs, 43, impart the rocking reciprocatory movement to the
arm, 44, of the rock-shaft, 45; and the rocking movement of such shaft, through
its duplicated lever-arms, 46, which are connected to the horizontal rod, 47, impart
a bodily reciprocatory movement to said rod, which, being in engagement with the
upturned perforated, or slotted members, 48, of the bars, 35, drive the latter.
The engagement between the upturned members of the operating bars, 35, and
the rod, 47, is a loose sliding one so that any required adjustments of the parts, C¹³,
carrying said operating bars, 35, will be permitted and ensured without any
attention to this connection.
The device, D, which turns inwardly and rearwardly the end-flap, is constructed
in the form of a pusher block, or plate, carried by the intermediately pivoted
lever, 50, the pivotal support, 52, for this lever being in the bracket, 53, which is
bolted upon the stationary cross-bar, H, which extends horizontally across the front
of the machine between and supported by the uprights, a², 2, and above the
rests, B, B, and with its rear vertical face in a plane very slightly in advance of
the faces, 21, of said rests, B.
The said intermediately pivoted lever, 50, has its upper arm in connection with
the thrust-rod, 54, the roller, 55, of which is in operative engagement with the
cam, 56, of the main-shaft, F.
The spring, 57, is operatively applied to ensure the retractile movement of the
parts as the cam recedes, all as common in this class of machinery.
JJ represents the gummers. These have a reciprocatory movement horizontally
fore-and-aft to gum the end flap near the marginal portions thereof which are to
be brought against and united to the stay sections, a,, (sec Sheet 5).
These gummers have their projection forwardly, to gum, in their paths of
movement which are just above the rests, B, B, and their gumming impact is
against the aforesaid bar, H, though of course directly against the interposed end
flap,, which, as clearly seen in Figure 6, lies against the rear face of this bar
up to the gages, 60, 60.
The guminers J. J, consist of suitably faced gummer bodies which, are
secured, with their vertical gumming faces forwardly presented, upon the
horizontal bar, 63, which is carried at the forward end of the shaft, 64, which
latter is constrained for its fore-and-aft movements in ways therefor of the guide
support, 65.
The shaft, 64, receives its reciprocatory movement by being linked to the
lever, 66, of the rock-shaft, 67, which shaft receives its rocking movement by
having its arm, 68, connected to the thrust-rod, 69, the roller, 70, of which is
impinged upon by the cam, 72; in conjunction with this cam the retracting
spring, 73, is operatively applied for the manifest purpose. The aforesaid gummer-
supporting-bar, 63, is longitudinally slotted, as seen at 75, whereby, through means
of the bolts, 76, the gummers may be adjustably confined in any proper degree of
separation.
The gummers are gummed by means as follows:
The gum-box, M, with the gum-box-roll, 71, is mounted above the paths of
movement of the gummers; and just forward of the ends of the gum-box are the
two opposite standards, 77, 77, having the slots, 78, which are vertical as to the
greater portion of their lengths, with, however, the rearwardly curved upper
5 terminals seen at 79, Figures 1 and 4.
1
The gudgeons of the bodily reciprocatory gum roll, f, extend through said
slots, 78, and outside of the said standards, they receive connection with the

page_text: slotted arms, 81, which extend forwardly from the rock-shaft, 84; this rock-shaft
is operated by cam, 85, and spring, 87,, through the thrust-rod, 91, and radial
arm, 93, of the said rock-shaft,, 84.
As the arms, 81, are swung, the gum-roll, f, moves, as it is constrained to do by
the slotted standards, vertically over the faces of the then properly positioned
gummers, J, and then rearwardly to contact against the gum-box-roll, 71.
The aforesaid bar, H, is surrounded by the tube, or envelope, d, of flexible
material, such, for instance, as one constituted in part of canvas or other textile
material, as seen at 80, and in part of an extra thickness of rubber, as seen at 82,
the one edge, 83, of which rubber thickness is horizontal and longitudinally along
the inner face of the bar, H, between its upper and lower edges, as seen in
Figure 6, particularly.
The object of this band, or envelope, d, surrounding the bar, H, is to provide at
the rear face of the said impact part, H, an even and prominent layer or thickness
which is to reach up just as high as the upper edge of the end flap so that when
the gumming face of the gummer comes against the end flap, x, with a layer of
gum thereon which may be fully as thick or a little thicker than the thickness of
the blank, and in case the gummer has a height greater than the vertical extension
of the flap, a³, there will be a distance of seperation,-when the gummer has come
to its impact against the blank,-between the face of the gummer and the
proximate face of the bar, H, or the rebated part of the envelope, d, therefore,
greater than may ever be spanned by any layer of gum on the gummer; thus there
can be no accumulating deposits of gum against the rear face of the impact-bar, H,
to, after a time, prevent the gummer contacting properly on the end-flap.
The gages, 60, 60, are carried upon the aforesaid envelope, d, surrounding the
bar, H, and when this bar is adjusted to bring the upper edge, 83, of the more
prominent layer, 82, at any given height to correspond with the width of the end-
Alap, the said gages, 60, 60, are incidentally, and correspondingly properly brought
to their due adjustments.
In order that the aforesaid inturning device for the end-flap may have its proper
action against the flap which, while being gummed and previously to being inturned,
lies against the inner side of the impact bar, H, faced as aforesaid, the said bar, H,
is apertured as seen at 86.
The follower, G, has its descending movement, after the gummed flap, a, and
stay-sections, 25, have been inturned to set and unite these parts firmly upon each
other and to impart the decided and true right-angular shaping to the end of
the box by means, for instance, such as the duplicated cams, 88, which impinge
for the descent against the rollers, 89, of the said follower and for the ascent of
the follower against the rollers, 90, which are carried at the upper ends of vertical
arms 92.
In addition to the rests, B, B, projecting forwardly from the front of the bed
of the machine there is also another stop or rest seen at L, which is below and
between the said rests, being projected forwardly from its supporting connection
with the under part of the bed so that the vertical face, 95, at its outer
extremity will be substantially in a plane coincident with the outer vertical end
faces, 21, of the said rests.
This machine is so constructed and equipped that it may be intermittently.given
one complete operation at pleasure,-as occasioned by one complete rotation of its
driving shaft, by means of the rod, 96, which may be actuated by a treadle, or
otherwise, the end wise thrust of which rod ensures the establishment of clutched
relations of the loose pulley, 97, on the main shaft, F, with the fixed collar, 98, on
said shaft through means of intervening devices which also automatically secure
the unclutching when the one complete operation of the machine has been effected
and, which devices will be now.pointed out.
The hub of the loose pulley, 97, has in circular arrangement a series of
sockets, 99, while the fixed collar, 98, has the bolt, 100, which plays in a socket, 102,
therefor, in the said fixed collar, which is parallel with the axis of said collar.

page_text: This bolt, 100, carries the radial stud, 103, which projects through and beyond the
ongitudinal slot, 104, through the side of the collar which is open to the said
socket, 102. The said radial stud, 103, of course revolves in consonance with the,
rotation of the shaft, F.
Under the shaft, F. and adjacent the path of revolution of said stud, 103, there
is a bracket, or casting, 105, suitably sustained by one of the uprights, a. This
part has at its shelf-like top a construction such as seen in Figure 12, that is it has
a vertical slot, 106, the length of which is parallel with the shaft, F; at the
forward side of the slot the bracket top is formed with an abutment, or raised
wall, 107, which occupies a portion, only, of the length of said slot while at the
rear side of the bracket there is another raised part, 108, with the rear surface
thereof cam-formed, or beveled, as seen at 109, the inclination of this bevel being
from a point at the rear of the bracket near its end which is towards the end of the
shaft, F, to a point which is near the plane of the outer end of the abutment, 107.
The angular lever, h, to an arm, 110, of which the operating rod, 96, is connected,
has its other arm, 112, extended to play within the aforesaid slot, 106, its extremity
being between the stud, 103, and the end of the slot.
Of course when the stud, 103, has a position against the abutment, 107, which is
when the bolt which carries this stud is withdrawn from its clutching engagement
with the loose pulley, the collar, 98, and the shaft, F, as well, are restrained.
against rotation; now so soon as the angular lever, h, is swung to force the stud
out from engagement with the abutment, 107, the bolt, 100, is moved into clutch,
whereupon the main shaft, F, receives its rotary movement,-the now revolving
stud, 103, being permitted to pass the end, 113, of the abutment, 107;-the plane
in which this stud, 103, revolves is one which intersects the oblique rearwardly
presented face, 109, of the raised part, 108, so that one rotation of the shaft,
having been almost completed, the stud is, by its impingement against the cam
surface, 109, caused to have a movement lateral to its plane of revolution, causing
the bolt, 100, to be withdrawn from clutch and its stud to assume a position to have
its further progress impeded by the abutment, 107.
It will be manifest from the foregoing description and a familiarity with the
accompanying drawings that this machine may be utilized as follows:-
--
When the machine is at rest and the follower, G, is elevated and the pusher, or
inturning device, D, stands in its forward position and the stay-section deflectors, C,
are receded, the operative may, after having seized the blank and bent the side
flaps at right angles to the bottom, as shown in Figure 10, slip the blank into
the relative position indicated in Figure 6 so that the flap, d, at one end is pushed,
up and upon the inner face of the bar, H, the bottom section lies against the
outer or front end faces of the rests, B, B, and the stop, L, the side flaps, t, lie
against the opposite lateral sides of the rests, B, B, and between such sides and
the supports, C, C', while the stay sections,,, project above the level of the,
tops of said rests; the machine is now set in operation whereupon in their due,
times the gummers, J, J, forwardly move to gum the blank and recede, the
devices C, C, inwardly deflect the stay sections and the pusher, D, inturns the end,
5 flap, whereupon the follower, G, descends and sets the inturned flap and stay
sections, the devices, C, C, and D, having in good time, as determined by the grade,
of their operating cams, receded.
5
The machine is now automatically stopped by the unclutching device whereupon,
the box is reversed and its other end is operated upon by the means, and in the
manner described whereupon the completed box is withdrawn to leave the machine,
clear for a repetition of the said operations.
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 :
1. In a paper box machine, the combination with a stationary perpendicular:
front-faced rest against which to set the box-blank, having a flat top, and

page_text: perpendicular lateral sides, of a deflector for the end flap, having its location
normally above and in front of the said rest and adapted to move above and rear-
wardly across the top of said rest, and then to retreat, and the paired deflectors for
the stay-sections adapted to have approaching movements across and above the
lateral upper corners of the said rest and to then recede, and means for imparting
the reciprocatory movements to the said deflectors, substantially as described.
2. In a paper box machine, a rest having a flat top, perpendicular front surface
and perpendicular lateral sides, a bar above and having its rear vertical face slightly
in advance of the plane of the front-face of said rest, in combination with gummers
having a reciprocatory movement forward and rearwardly above said rests to and
away from said bar, substantially as described.
3. In a paper box machine, a rest having a level top, a perpendicular front
surface and perpendicular lateral sides, a bar above and having its rear vertical face
slightly in advance of the plane of the front-face of said rest and having an aperture
therethrough, and the end flap deflector mounted to move above and rearwardly
across the rest and through the said aperture and to then retreat, and means for
actuating it, substantially as described.
In a paper box machine, a rest for the paper box blank having a level top, a
perpendicular front surface face and perpendicular lateral sides, of a fixed bar
above and having its rear vertical face slightly in advance of the plane of the
front face of said rest, and having one or more gages rearwardly extended from
its vertical rear face, substantially as described.
5. In a paper box machine, the combination with the rests, of the bar above and
forward of the plane of the front face of the rest and end-flap deflector, lateral
stay-wing deflectors, horizontally reciprocatory gummers and the follower to descend
against, and rise from, the top of the rest, and means for imparting the motions to
said respective movable devices, substantially as described.
6. In a paper box machine, the combination with the pair of rests and the
supports for the stay-wing deflectors supported thereon and which with said rests
are adjustable, substantially as described, of the stay-wing deflector slides, horizontal
reciprocatory gummers, which are adjustably mounted, the end flap deflector and
the follower to descend against and rise from the top of said rests and means for
imparting the motions to said deflector slides, the gummers, the end flap deflector
and said follower, substantially as described.
7. In a paper box machine, the combination with bed or table having groove
way in its front face, of the blocks or rests, B, B, having at their rears the projecting
members, 27, to fit in said groove-way, and meaus for holding them in confinement
in said groove-way, substantially as described.
8. In a paper box machine, the combination with the bed or table having a
groove-way therein, of the blocks or rests, B, B, having supporting and slide
engagements in said groove-way, of the right-and-left-hand screw which screw
engages said rests, and means whereby to rotate it, substantially as described.
9. In a paper box machine, the combination with a bed or table, of blocks or
rests, B, B, having a movable supporting engagement at the front of the table and
supporting inturning devices for the stay-sections which have their position outside
of, and at a short distance from, the lateral vertical sides of said rests, and means
for causing the approaching movements of said devices above, and across, the upper
corners of the rests, substantially as described.
10. In a paper box machine, the rests, B, B, and the stay-section inturning
devices, located outside of the lateral vertical sides of said rests, and having
supports therefor which are sustained by, and movable as one with, said rests, but
which have their positions alongside of, and separated from, the said vertical lateral
sides of the rests, substantially as described.
11. In a paper box machine, the combination with the bed having the groove-
way and the rests, B, B, which have support and slide engagements in said groove-
way and which carry the supports, C, C, at, and separated from the vertical
lateral sides thereof, of the stay section inturning slides which normally have

page_text: positions outwardly beyond the space separating their supports from the sides of
the rests, means for imparting the reciprocatory movements of the slides across said
space, and the right-and-left-hand screw engaging the pair of rests, with means for
effecting its rotation, substantially as described.
12. In a paper box machine, in combination, the rest, B, having supported in
fixed relation to its lateral side the support-block, 26, which is provided with the
transverse way, 33, and therebelow the way, 34, at right angles thereto, the slide
constituting the deflector for the stay-section, movable in the transverse way, 33, a
bar movable in the way, 34, and having a cam and stud engagement with
said slide, and means for imparting a reciprocatory movement to the bar,
substantially as described.
13. In a paper box machine, the combination with the bed having the groove-
way in its front face and having the horizontal longitudinal slots extending through
it from its grooved front to its rear side, of the blocks, or rests, B, having at their
rears the projecting members, 27, to fit in said groove-way, the bolts engaging said
rests and passed therefrom through said slots of the bed and provided with
confining nuts, substantially as described.
14. In a paper box machine, the combination with the rests, B, substantially as
described, and the apertured bar, H, standing above, and just forward of, the rests,
of the end-flap inturning device which consists of the lever pivotally mounted and
having at its extremity a part to move through the aperture of the bar and adapted
to impinge against the end flap of the properly presented box blank, together with
the cam, a thrust-rod operated by the cam, and connected to said lever, and the
retracting spring, 57, substantially as described.
15. In a paper-box machine, the combination with the table having the separate
and adjustable rests, B, B, which have level tops perpendicular front-faces in a
coinciding plane, and perpendicular lateral sides, of a stop, L, having a vertical face
which is in a plane coincident with the perpendicular front faces of said rests,
substantially as described.
16. In a paper box machine, the combination with the rests, B, B, and bar above,.
and in front thereof, of gummers, J, J, and a reciprocatory carrier, mounted for a
forward and rearward movement over said rests to, and against, and then away
from, the rear face of said bar, the guiding shaft, 64, for said gummer-carrier and
the support and guide-ways therefor, the rock-shaft, 67, having the lever-arm, 66,
connected to said shaft, 64, and having the arm, 68, a cam, and a thrust-rod
operated thereby and connected to said arm, 68, substantially as described.
17. In a paper box machine, the combination with rests and supports, C.
adjustable in unison, the stay-section inturning devices mounted on said supports C³,
of the bar, H, above and in advance of the rests, B, and the gummers adjustably
mounted on a horizontally reciprocatory support, substantially as described.
18. In a paper
box machine, the combination with the reciprocatory
gummers, J, J, and the gum-box-roll located adjacent the receded position of
the gummers, the members, 77, having the slots, 78, therein, comprising the
deflected terminals, 79, the gum-supplying roller, f, having its journal constrained
to move in said slotted member, 77, the rock-shaft, 84, with its slotted arms, 81,
which engage the journals of the roller, f, and the lever-arm, 93, the cam and
thrust-rod, 91, and spring, 87, all arranged for operation substantially as
described.
19. In a paper box machine, the combination with the bar, H, of an envelope
which is in the form of a flexible tube adapted to the cross sectional contour of the
bar, which may be slipped around on the bar and provided with one or more
rearwardly projecting gages, 60, 60, substantially as described.
20. In a paper box machine, the combination with the bar, H, of an envelope
which is in the form of a flexible tube adapted to the cross sectional contour of the
bar, and which may be slipped around on the bar and which is provided with the
extra thickening layer, 82, which has its upper edge at some distance below the top.
edge of said bar, substantially as and for the purpose set forth.

page_text: 21. In a paper box machine, the combination with the rests, B, B, adjustably
mounted and each having, in fixed relation to its lateral side, and separated
therefrom, a support which is provided with a slide-way for the stay-wing deflector
which has a position, normally, outside of the space that separates the rests from
said support, slide-bars movably guided in said supports and having cam-actuating
engagement with the said deflector slides, a rod with which said slide-bars have
sliding engagements and means for imparting a bodily reciprocatory movement to
said rod in a direction at right angles to its length, substantially as and for the
purpose set forth.
22. In a paper box machine, the combination with the slides, C, C, movable in
Bupporting ways therefor and reciprocatory bars, 35, 35, having studs engaging in
cam slots of said slides, of the rod extending crosswise of, and having sliding
engagements with both of said bars and means for imparting a bodily reciprocatory
movement to said rod in a direction transversely of its length, substantially as
described.
23. In a paper box machine, the combination with the bed of table and the
rests, B, B, movably mounted on the bed, having the supports, C3, C³, supported
thereby in separation from their lateral sides, which supports have the slides, C, C,
adapted for movement in ways thereof across the adjacent edge of the rests, B, B,
the bars, 35, 35, having studs engaging in cam slots of said slides, the rod extending
crosswise of, and having sliding engagements with both of said bars, means for
imparting a bodily reciprocatory movement to said rod in a direction transversely
of its length, and the right-and-left-hand screw engaging both of the said rests, B, B;
substantially as aud for the purpose set forth.
Dated this 28th day of May 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.