Improvements in Paper Files and Attachments.
Year: 1892

page_text: Date of Application, 29th Nov., 1892-Accepted, 31st Dec., 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by JOHN F. OHMER, Wilfrid I. OhmER, ALFRED
A. OHMER, and EUGENE A. OHMER, doing business in copartnership under the
name and style of M. Ohmer's Sons, of No. 132, North Main Street, Dayton, in
the County of Montgomery and State of Ohio, United States of America,
Manufacturers.]
Improvements in Paper Files and Attachments.
I, AMBROSE MYALL, of 21 Cockspur Street, Pall Mall, in the County of
Middlesex, Civil Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to certain new and useful improvements in paper files
and attachments.
These improvements have reference to clamps in which the expansion of papers
compressed within the file increases the grip of spreading pieces upon the side-
bars of a file box; to other forms of construction in which the expansion of
the papers creates the grip; to others in which the grip is effected by the
spreading pieces through other means than the expansion of the papers; have
reference to equalizing the grip of said pieces automatically; and to means for
breaking their gripping engagement; have special reference to the provision of
friction, or clutching devices carried by the slide of the platen or plate, in com-
bination with operating means adapted to throw such devices into engagement with
the rods or ways through the action of gravity.
The instrumentalities and details by which my invention is carried into practical
operation will be hereinafter more fully described, and pointed out in the claims.
In the accompanying seven sheets of drawings, on which like reference letters
indicate corresponding parts;
Fig. 1, represents a plan view of pivoted gripping pieces and portions of the side-
bars, the supporting cross-piece being in section ;
Fig. 14, a file box and clamped file;
Fig. 2, a vertical section on x x Fig. 1;
Fig. 3, a similar view to Fig. 1, showing the gripping pieces abutting on each
other to equalize the gripping engagement.
Fig. 4, another view showing the pieces directly actuated by the expansion of the
paper and equalized;
Fig. 5, a similar view on the same principle as Fig. 4, with the gripping pieces
laid in cross piece or casing and simply fulcrumed ;
Fig. 6, a cross section on the line y, y, of Fig. 5;
Fig. 7, a bottom view of a device in which the grip is effected by. a spring piece
acted on by the expansion of the papers;
.
Fig. 8, a section on the line 2, 2, of Fig. 7;
Fig. 9, represents a front view of my device mounted on the side-bars shown in
section ;
Fig. 10, a side view of a file box and my device mounted thereon ;
Fig. 11, a similar view to Fig. 9, showing straight links;
Fig. 12, a vertical section through the center of Fig. 11;
Fig. 13, a similar view to Figures 9 and 11, showing the links operated by a cam
as a rotatable piece ;
Fig. 14, a plan view of Fig. 13;
Fig. 15, a vertical section through the center of Fig. 13, the lower position of the
cam being indicated by dotted lines;
Fig. 16, cam operated vibrating arms and operative cam and a fragmentary view
of a side-bar notched ;

page_text: Fig. 17, represents a side elevation of a letter file embodying my invention, a
part being broken away to facilitate illustration ;
Fig. 18, a rear view of the same with a part in section to assist also in illustrating
my improvements.
Fig. 19, a detail view on a larger scale showing the friction or clutching device,
the operating handle, the sliding bearing, and the rod or way;
Fig. 20, a similar view showing a modification of the friction or clutching
devices;
Fig. 21, another similar view showing another modification of such devices;
Fig. 22, a sectional view of the sliding bearing and rod, and rear view of a 1
frictional clutching device and operating handles;
Fig. 23, a side elevation of a paper file entire, showing still another modification
of my improved frictional or clutching device.
Fig. 24, a plan view of the same parts;
Fig. 25, a horizontal section of the sliding bearing and a plan view of one of the 1
rods, and of a friction or clutching device;
Fig. 26, a section on the line x x of Fig. 24; and
Fig. 27, still another modification.
The letters, A A; designate the side-bars or guides on which the clamp is mounted.
A cross-piece or casing B, is slidingly engaged with said guides, and a pressure 2
board C is connected thereto, to receive the expansive action of the file D, after
the compression of the same within the box. This pressure board may be mounted
on a pivot E, as in Figures 1, and 3. Any thickness of the papers effecting a
slanted. position of the board, will still be communicated to the center of the
casing.
In Fig. 1, the side-bars are gripped by spreading pieces F, pivoted at G, and
thrown into gripping engagement by a spring H. The clamp may be readily slid
towards the papers and compressed thercon but the spring H will immediately
spread the pieces to grip the side-bars on any attempt to slide the clamp backward,
except by operating a push piece or sliding rod I, which throws the gripping pieces 3
to the dotted position. The clamp may be readily drawn back by the knob J,
engaged by the fingers, while the thumb acts on the push piece I. Here the
expansion of the papers increases the grip of the spreading pieces.
In Fig. 3, a similar spring H, acts on the spreading pieces K, slidingly mounted on
pins L, and butting together at their inner ends in their gripping position as 3
shown in Fig. 3. Here it will be seen that the expansion of the papers likewise
increases the grip of the spreading pieces while the latter press equally on the
side-bars on account of their sliding support.
.
In Fig. 4, the spring in the other forms is done away with preferably, and
the spreading pieces are directly engaged by a knob M, forming an extension 40
from the back board C, and engaging, with the spreading pieces at their inner
ends, which pieces may be either pivoted as F, on the left, or slidingly
mounted like K, on the right. The clamp being, pushed against the papers,
the expansion of the latter will immediately act to spread the gripping pieces
as shown in this figure. A push rod similar to the former breaks the gripping 4
engagement as before.
•
In Fig. 5, spreading pieces Q, are shewn simply laid within the supporting case
with their inner. ends engaged with the projections at O, on a push piece which
serves also as a support for the pressure board C. Instead of a slotted or pivoted
engagement of the spreading pieces with the supporting case, I provide fulcrums P, 50
engaging with the spreading pieces either with or without the notch P¹ shown on
the right. The spring H, may or may not be used in this form, since the action of
the compressed papers will serve to spread the pieces Q, before tending to slide the
clamp. The grip is broken by operating the push piece to the dotted position.
The pressure board C, in this case is loosely mounted on the end of the push piece 5
to accommodate itself to the pressure of the papers, as indicated by dotted lines.
.The equalizing feature is also included in this form.

page_text: In Figures 7 and 8, the gripping engagement is effected by a double armed
piece R, loosely or otherwise mounted at S, in an extension from the back board,
which is engaged by a push piece sliding in the case or support. This piece R,
has a certain amount of resiliency and tends to straighten and thus spread out to
grip the side-bars as shown. By pushing in on the piece I, the ends of the
spreading piece are brought inward by the action of the piece against the stops T,
on which it slides as shown by the dotted lines. Here the spreading piece effects
its own gripping engagement with the rod, which is increased by the expansion of
the papers thereon. The rods are gripped equally by reason of the slidable
mounting of the piece R as shown at S. The pressure board C, may vibrate on a
horizontal axis formed by the rod U, having the guide pins V.
This loosely mounted connection of the pressure board is one of the important
features of my device. In Fig. 4, the same effect as in Fig. 5, is produced by
means of the ball head M; in fact, in both of these figures the connection is such
as to form a universal joint allowing of vibrating the board back and forth sidewise
as indicated by dotted lines in Fig. 5, and also back and forth at the upper and
lower ends of the board. Thus if the papers are a little thicker on one side than
on the other, the board will adjust itself to press both sides equally; if the top of
the papers in the file are somewhat thicker than the bot om, the board at the top
will be pressed backward and press both the top and bottom of the file uniformly.
This pivotal connection also allows the papers to lean backwards when the grippers
are released and the papers loosened from the clamp for examination. In Fig. 7,
the same effect is produced by the center connection and guiding pieces V. The
transverse rod U supports the pressure board to allow the backward and forward
motion of the top and bottom of the board on the horizontal, while the guides V
readily vibrate independently. Figures 4 and 5 show the pressure board with
merely a central connection giving the universal joint action above mentioned.
Fig. 7, is somewhat steadier and less pliable in its motion. I wish to be under-
stood as laying claim broadly to the above universal connection of the pressure
board with its support.
I have thus fully described and illustrated forms by which the before mentioned
expansion of the papers may serve either to actuate the gripping pieces, or increase
their grip after being otherwise brought into engagement with the side-bars' or
rods of the file box. I do not limit myself to any particular construction or
arrangement of the parts herein shown and described, but have been thus full 'in
order that my invention may be carried into effect in a variety of ways. The
adjustability of the spreading pieces to and from each other, and the side-bars,
allows of readily fitting up the device without the care and nicety that would be
otherwise required. A better action at less trouble and expense, thus results.
It will be observed that in some of the constructions, the spring proper acts on the
gripping pieces; in other arrangements the expansion of the compressed papers acts
on the grippers with a reaction or spring-like force; in both, the grippers are actuated
by a spring action, which will be found in all the arrangements so far illustrated,
and constitutes the underlying principle of my device.
In Figures 9 to 16 the pressure-board C, is carried by the cross-piece B, and
vibrating rods or arms E' are also secured to said cross-piece, as will be presently'
described, and impinge at their outer ends in a locking engagement with said side-
bars, being resisted or opposed in their pressure thereon, by the reactionary pressure
of the cross-bar on the other side from the vibratory arms. The object is to grip
the side-bars between the arms and the cross-bar B, by operating means that
will act on said arms to secure a spring-like bending of the parts and effect a 'set
position of the mechanism. This may be effected by inclined links as in Fig. 9;
straight links and extension of the rotatable piece, as in Fig. 11, and cam means as
in other figures, which serve to illustrate means for producing this engagement of
the vibrating arms. In Figures 9 and 10 the vibrating rods or arms E' are pivoted,
preferably at one point g' to the cross-bar, which latter opposes the ends of said
arms when they are brought down upon the side-bars A, by the action of the

page_text: connecting links M¹ operated by the handle h. These links M' are connected at one
end to the arms at some distance from the pivot point of the arms, and at the other
to a rotatable piece, H¹. It will be observed, however, that the rotation of the
piece, H', in Fig. 10, will bring the point of attachment of the links at their lower
ends, in line with, (or a little beyond), the center G', and the upper point of
attachment of the links. This will effect a set position of the parts. The links
will stop in their locked position against the cross-bar B, or otherwise. Thus the
parts are set in their locking position, and the outer ends of the arms E' are brought
down firmly upon the side-bars, to grip them between the opposing ends of the cross-
bar. As before mentioned, the spring of the parts will allow of operating the
rotatable piece into the set position. By this form just described, the spring of the
arms is considerable, and permits of more readily adjusting the parts when setting
up the same.
In Figures 11 and 12, this spring of the parts is increased by connecting the
links M with a cross extension N of the rotatable piece, the length of which
extension, as seen in Figure 11, is such as to allow a straight connection of the
links, instead of the triangular arrangement of Fig. 9.
In Fig. 13, the arms E¹ are brought down upon the side-bars by means of a
double armed piece M", which takes the place of the two links and the cross
extension N' shown in Fig. 11. A rotatable piece H¹ pivoted at G¹ Fig. 15,
is brought down by means of a handle h, so as to bear upon the double armed
piece M, and cause the arms E¹ to operate as before described. The point
of contact of the piece H¹ will travel along the bearing plate m', so that the
spring of the double armed piece and the arms E', will react through the
center of the pivot G', or just beyond the center, to effect a set position of
the parts and lock the same, as previously described.
In Fig. 16, the cam-like rotatable piece H', bears against one arm E¹ which
acts on the other arm to throw it also to its locking position. Each arm is pivoted
between its ends.
The side-bars A may be smooth, and the grip effected by frictional contact of
the locking arms or rods, operating against the opposing portion of the cross-bar B.
Or, if desired, indentations, c, may be formed in the inside-bar, as shown in the
small figure of Fig. 16, in order to assist the grip of the parts on the said side-
bars. The spring of the parts when in their set position, and the grip they exert
upon the smooth side-bars constitute the preferred form of engagement of the
parts; the bars when smooth, readily allow the clamp to slide back and forth
thereon, allowing an easy and silent adjustment.
In Figures 19 to 27 inclusive, I have illustrated various forms or constructions
for carrying my invention into effect. In all the forms, it will be observed, the
dominant feature of a friction or clutching device adapted to engage with the rods
or ways to prevent the bearings from slipping or sliding back and releasing the
compression of the documents, prevails; in Figures 19 to 27, a gravitating device
for the friction or clutching device is shown. I will now describe the several forms
in detail.
In Figures 17, 18 and 19, the cross-bar B, is provided with plates B¹, to which
are pivoted dogs or detents F, at f, the lower end of the dogs being slotted at I¹.
To each of these plates is pivoted an arm J', of a handle lever h, the pivot being
at k. This bandle lever is made sufficiently heavy to gravitate with such force as
to throw the dogs F into contact with the ways or rod with sufficient positiveness,
so that in connection with the tendency of the dogs to bind against the rods in
an attempt to slide the bearings back, the bearings are held against such move-
ment and are made to resist the pressure of the documents against the platen or
follower, B.
i
The bearings, however, may be pushed forward so as to carry the platen or
follower up
to the documents, or to move it against them to compress them, either
without lifting the handle lever, or by lifting it and relieving the ways or rods of
engagement by the dogs. It is preferred to raise the handle as this prevents

page_text: unnecessary wear between the dogs and ways or rods. It is only necessary; how-
ever, to drop the handle lever, when the dogs, by such operation through the gravi-
tating action of the handle, immediately assume the binding position and lock the
bearings against any back movement.
Referring to Figures 20, 21 and 22, it will be seen that the dogs F" are mounted
on the same pivot f¹ with the handle lever, such pivot having a bearing in the
plate B of the cross-bar, B. It will be also noticed that in Fig. 20, the dog
engages the lower side of the rod or way A, while in Figures 21 and 22, the dog
is shown engaging with the upper side of said rod. or way. These two forms are
alike, however, in so far as concerns the dogs being rigidly connected with the
handle lever, so as to move with the handle lever.
In Fig. 20, the dog extends away from the handle lever and is thrown into, and
maintained in, clutching engagement, by the rearward gravitation of the handle
lever, while in all the remaining figures the handle lever gravitates in a forward
direction in order to operate the dogs into engaging position. In all these last
described, however, the gravitating action applied through the handle lever and
dogs to lock the bearings in one direction, and leave them free to slide in the other
direction, is preserved.
In Figures 23, 24 and 25, I have arranged the dogs F so that they, will engage
with the inner side of the rods or ways. The dogs are pivoted at 8 to a bracket 9
secured to a cross-bar B. The inner ends of the dogs are provided with elongated
holes or slots 10 and are slightly overlapped, as suggested by the dotted lines in
Fig. 25. The gravitating handle lever Jis pivoted to the cross-piece B through
brackets 11, extending down from such cross-piece and receiving the pivot 12.
The cross-piece is slotted, as seen at 13 in Fig. 25, to receive one end of the arm
of the handle lever, the upper termination 14 of such arm passing through the
elongated holes or slots 10 of the dogs, and so engaging them that, as the handle
lever gravitates, it throws the dogs into engagement with the rods or ways, and
thus locks the cross-piece B and its attached platen or follower, C, against moving
back. By raising the handle lever, the dogs are thrown out of engagement with
the rods or ways. The cross-piece with its platen or follower can be moved back
and forth or away from the documents and then back to them when the handle is
in elevated position, and these movements can be given by and through the handle.
The positions of the dogs are shown in the dotted lines in Fig. 24, and the full
lines in Fig. 25, which is the engaging position, and in the dotted lines in Fig. 25,
which is the disengaging position.
In all of the figures save 23 to 26, the cross-piece is a single piece or plate
extending from bearing to bearing. While the detail construction of this part of
the device is not material, I have shown this cross connection in the latter. figures
in the form in cross section of a box, there being plates besides the cross-piece B
which form a rectangular cross section. A bracket 15 connects each pivot 16 of
the platen or follower with the plate as shown in Fig. 26.
I have illustrated the dogs shown in Figures 20, 21 and 22, as having serrations
to make them engage the ways or rods with a pricking action.
In Fig. 25, I have shown the rods or ways as serrated at A¹ for the engagement
of the dogs in a more positive manner. Serrations may or may not be used.
Referring to Fig. 27, it will be seen that yet another modification is illustrated.
In this figure, a dog 2, is pivoted at 3 and provided with a point adapted to enter
the serrations A' of the way A. The dog is slotted at 4 to receive the pin 5 by
which it is connected with a part 7, through the hand lever J'. This lever in
Fig. 27, is pivoted to the bearing or slide at 6, which is a point in line with the
center of the way or rod, so that in operating the platen or follower through the
handle lever, the force will be applied at the place best adapted to prevent binding
of the bearing or slide on said way. The lever has a projection 7 adapted to
extend down to the slotted dog engaging by the pin 5.
It will be understood that this is a sectional view showing the cross-piece B.in

page_text: "
section, and one of the dogs, and its connection with one arm of the lever. In
organizing the complete device, these parts are in duplicate, there being a set for
each end of the cross-piece B.
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:
1st. In a file box, the combination with side-bars, or guides, of a sliding support
or case mounted thereon, and adapted to compress the papers within the box,
spreading pieces mounted on said support, a spring to spread them into gripping
contact with said bars, and a push piece to break said gripping engagement, the
expansion of the papers acting on the supporting case, and increasing the gripping
contact.
2nd. In a file box, the combination with side-bars and casing or support
slidingly mounted thereon, of spreading pieces adapted to grip said side-bars and
abutting on each other in their gripping position, a spring to effect said gripping
contact, the expansion of the papers compressed by the clamp acting to increase
said engagement, the gripping engagement being broken by reversely operating said
spreading pieces and equalized on said bars by the abutment of said spreading pieces.
3rd. In a file box, the combination with side-bars, and a supporting cross-plate
or case slidingly mounted thereon, of spreading pieces slidingly mounted on said
support and adapted to grip said side-bars at their outer ends, and abutting on
each other in their gripping position to equalize the grip on both bars, the expansion
of the papers increasing said gripping engagement, and a push piece to break said
engagement.
4th. In a file box, the combination, with side-bars and a supporting case slidingly
mounted thereon, of spreading pieces slidingly mounted on said supporting case
and adapted to grip said bars at their outer ends, a pressure board acting on their
inner ends to spread the same under the expansive action of the papers in the said
file, whereby the expansion of the papers will act directly on the gripping pieces to
spread them.
5th. In a file box, the combination with side-bars and a supporting case slidingly
mounted thereon, of spreading pieces adapted to elongate and grip the side-bars, a
pressure board acted on by the expansion of the papers and operatively connected
to said spreading pieces to communicate directly the expansion of the papers
thereto, and a push piece acting to compress the papers and break said gripping
engagement of the spreading pieces.
6th. In a file box, the combination with side-bars and a supporting piece
slidingly mounted thereon, of a spreading device mounted between said side-bars
and adapted to grip the latter, a pressure board for the filed papers connected to
said-gripping device to spread the same under the expansive action of the papers,
and a push piece to draw in said spreading device to break said engagement before
returning the clamp.
7th. In a file box, the combination with side-bars and a cross-piece slidingly
mounted thereon, of a pressure board or piece acted on by the expansion of the
compressed papers in the file, a spreading device operatively connected to said
pressure board or piece and spread into gripping contact with said bars by the said
expansion of the papers, the loosely mounted connection of said gripping device
with the said support and pressure board, allowing of equalizing the grip of the
said side-bars, substantially as described.
8th. In a file box, the combination with side-bars and a supporting piece
slidingly mounted thereon, of a spreading device carried by said supporting piece,
and adapted to be spread to grip said bars, and a push rod or button acting on
said spreading device to break said gripping engagement.
9th. In a file box, the combination with side-bars, and a cross supporting piece
slidingly mounted thereon, of a spreading device carried by said supporting piece

page_text: and adapted to be spread to gripping engagement with said bars, and a push
piece slidingly mounted between finger hooks mounted on said cross-piece, and
acting to break said grip of the spreading device by the action of the thumb thereon,
while the fingers are engaged with said finger hooks.
10th. In a file box, the combination with guides, and a supporting piece slidingly
mounted thereon, of grippers carried by said supporting piece, and a spring action
applied to said grippers.
11th. In a file box, the combination with side-bars and independent grippers
therefor, of a spring bearing near its ends against said grippers equally, and
movably, mounted to effect a like gripping engagement at each side-bar, whereby
if one gripper is slightly different from the other, the spring will compensate for
the difference and give a like grip to both.
12th. In a file box, the combination with side-bars and a cross-piece mounted
thereon, of a pressure board, carried by said cross-piece and having a universal
joint connection therewith, to allow of adjusting itself to different thicknesses of
portions of the file.
13th. In a file box, the combination with side-bars and a cross-piece mounted
thereon, of a pressure board supported at substantially its center by said cross-
piece, the connection between said pressure board and cross-piece allowing of the
sides of the board moving back and forth in a horizontal plane and the top and
bottom in a vertical plane.
14th. In a file box, the hereindescribed self-adjusting connection between a
pressure board and its support, the same consisting of a loosely mounted fulcrum
piece connecting said pressure beard with its support, whereby the board may
adjust itself at the sides, the top and the bottom, substantially as shown and
described, according to the irregular thickness of the papers in the file.
15th. In a file box, the combination with side-bars or ways, of a cross-piece, a
back board carried thereby, vibratory arms carried by said cross-piece and adapted
to impiuge on said side bars interposed between said vibratory arms and cross-piece,
and means to effect such impingement to lock the back board in its adjusted
position thereon.
16th. In a file box, the combination with side-bars or ways, of a cross-piece
slidingly engaged with said side-bars, vibratory arms pivoted to said cross-piece,
their outer ends adapted to engage sidewise with the side-bars interposed between
said cross-piece and arms, and operative connections acting on said arms between
their points of engagement and their pivots.
17. In a file box, the combination with side-bars or ways, of a cross-piece
slidingly mounted thereon, vibratory arms pivoted at their inner ends to said cross-
piece and adapted to bear against said bars at their outer ends, link mechanism
connected to said arms between their outer and their inner ends, and means to
operate said links and lock said arms upon said side-bars.
18th. In a file box, the combination with side-bars or ways, of a cross-piece
slidingly engaged with said side-bars or ways, pivoted arms carried by said cross-
piece and adapted to engage at their outer ends with said side-bars, and a rotatable
piece operatively engaged with said arins to effect a spring of the parts in operating
them to their locking position on said bars.
19th: In a file box, the combination with side-bars or ways, of a cross-piece,
slidingly engaged with said side-bars or ways, vibratory arms pivoted to said cross-
piece, a rotatable piece also carried by said cross-piece, and locking connections
between said rotatable piece and said arms adapted to give a spring action or
bending of the parts in operating them to and from their locking position
whereby a het position of the parts is assumed when the arms are locked on
said bars.
20th. In a file box, the combination with side-bars or ways, adapted to be slid
back and forth along said side-bars, of vibratory arms pivoted at their inner ends
to said cross-piece, and adapted to impinge at their outer ends, on said bars or ways,

page_text: a rotatable piece pivoted to said cross-piece, and links connected at their outer ends
with said arms between their pivoted points and the side-bars at their inner ends to
a point on the rotatable piece eccentric to its pivot or opposite said arms, whereby
in setting the arms to their locking position by the rotation of said piece the spring
of the parts will effect a set position of said rotatable piece.
21st. The combination with a file box, and side-bars thereon, of a cross-bar
slidingly engaging with said side-bars, arms pivoted to said cross-bar near the center,
links engaging with said arms between their pivot point and their ends, to allow a
spring of the arms when the outer ends of said arm are brought into gripping
engagement with the side-bars, the latter being interposed between said arms and
cross-bar, as in a vice, and a rotatable piece pivoted to said side-bar and engaging
with the other ends of said links, to exert a pull on said arms when the points of
attachment of said links and the pivot of the rotatable piece, are brought sub-
stantially into the same plane, the spring of the arms effecting a set position of the
parts in their locked position.
22nd. The combination with a file box and side-bars thereon, of a cross-bar
slidingly engaging with said side-bars, gripping arms pivoted to said cross-bar and
adapted to bear, at their outer ends, upon said side-bars, the pressure being
received by the cross-bar, to grip the side-bars interposed between, a rotatable
piece pivoted to said cross-bar, and link connections between said piece and said
arms, the points of engagement of the links with said arms and rotatable piece,
and the pivot of said piece, being brought into substantially the same plane, when
it is desired to effect a set position of the parts to lock the clamping device on said
side-bars.
23rd. The combination with the ways or rods and the sliding bearings and platen
or follower of a paper file, of dogs carried by said bearings, and a gravitating
handle lever also carried thereby and engaging with said dogs, the gravitation of
the handle lever throwing the dogs into engagement with the rods or ways in a
position which holds them against the back movement of the bearings.
24th. The combination with the rods or ways, the bearings slidable thereon and
the platen or follower of a paper file, of dogs and a gravitating handle lever con-
nected with said dogs, the gravitation of the handle lever throwing the dogs
into engagement with the ways or rods and locking the bearings against back
movement.
25th. The combination with the ways or rods, the bearing sliding thereon, and a
platen or follower of a paper file, of dogs pivoted to said bearings and a gravitating
handle lever also pivoted to said bearings, and a connection between the short end
of the lever arms and one end of the pivoted dogs, the normal position of the
handle lever subjecting it to a gravitating action in the longer arms thereof, for the
purpose described.
26th. The combination with the ways or rods, the slidable bearings thereon and
a follower or platen of a paper file, of dogs pivoted to the bearings and a handle
lever also pivoted to said bearings, the shorter arms of said lever engaging through
a pin and slot with one end of the dogs respectively, and the handle lever arranged
to normally tend by gravity to engage the dogs with the ways or rods.
27th. The combination with the ways or rods, the slidable bearings thereon, and
the platen or follower of a paper file, the bearings having depending plates, of a
dog pivoted to each plate with its upper end adjacent to the lower side of the rod
or way and its lower end slotted, and a handle lever whose arms are also pivoted
to said plates, said arms engaging through a pin with the slots in the dogs and
occupying a normal oblique or angular position to a perpendicular, the gravitation
of the handle lever operating to lock the dogs and the elevation thereof to unlock
them.
28th. The combination with the ways or rods, the slidable bearings and the
platen or follower of a paper file, of dogs pivoted to said bearings, and a gravitating
handle lever also pivoted to said bearings, a connection between the dogs and the

page_text: handle lever by which the dogs are moved into and out of contact with the ways
or rods, the gravitation of the handle lever effecting the former and the hand
manipulation of the lever effecting the latter.
29th. The combination with the ways or rods and the sliding bearings, and a
platen or follower of a paper file, of dogs carried by said bearings and adapted at
one end to engage with the rods or ways and provided with a slot in the other
portion and a gravitating handle engaging with said dogs through the sliding
connection in the slots of the dogs.
30th. The combination with the ways or rods and the bearings and a platen or
follower of a paper file, of dogs pivoted to said bearings with a slot in one end and
adapted at the other to engage with the rods or ways, and a gravitating handle
lever pivoted to the bearings substantially opposite the center of the ways or rods,
and having projections carrying pins fitted to said slots.
31st. The combination with the rods or ways, the sliding bearing and the
follower or platen of a paper file, of dogs pivoted to said bearings and a gravitating
handle lever slidingly engaging with said dogs.
Dated this 29th day of November 1892.
AMBROSE MYALL.