improvements in папи капр.
Year: 1895

page_text: improvements in папи капр.
We, JAMES HENRY GRESSITT and HENRY WILLIAM Fox, of No. 8 Vansant
Building, in the City of Baltimore, and State of Maryland, United States of
America, Manufacturers, 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 :-
Our invention relates to improvements in hand stamps of that class which employ
an oscillatory impression block. The invention will first be described and then
designated in the claims.
In the accompanying drawing,-
Figure 1 is a side elevation of the stamp.
Figure 2 is a top view of same, except that the depressing knob is omitted.
Figure 3 is a detail showing the construction of ink-roller bearing.
Figure 4 is a section of the oscillatory block and attached parts.
Figure 5 is a view of the tumble plate.
Figure 6 is a view of the knob carried on the shaft of the oscillatory block.
The letter, A, designates two vertical side plates secured together by cross
rods, d; a frame or yoke, C, has one end, c, pivoted at, E, between the two side
plates, and a torsional spring, e, wound around the pivot rod, E, serves to elevate
the free end of the said frame or yoke. The two side plates, A, have curved front
ends, the said curves forming part of a circle which is concentric with the
pivot, E. The curved end of one plate has a lug, a, which coacts with a notch, w,
on a tumble plate, H, and causes the impression block, B, to oscillate or partly
turn. The free end of the pivoted frame, C, has two yoke-arms, b, and the oscil-
latory impression block, B, has position between these arms and is carried thereby;
a shaft, m, passes through this block to which it is rigidly fixed, and the shaft ends
are free to turn in said two yoke-arms, b. The oscillatory block has at one end a
recess, i, and a spiral spring, j, is around the shaft and occupies the recess; one
end of the spiral spring bears against the inner side of one of the yoke-arms, b.
thus this spring serves to push the shaft, m, and the oscillatory block, B, end wise
and keep then normally pressed over toward the yoke-arm on the other side. The
tumble plate, H, heretofore mentioned, is loose on the shaft, m; this plate has two
edges, n, substantially at right angles with respect to each other, and the notch, w,
is in the corner adjoining the said two edges. Opposite this notch the tumble
plate has a curved edge, o, which extends from one edge, n, to the other; this
plate has a center hole, m', for the shaft, m, and a series of small holes, p, around
or concentric with said shaft hole. On the end of the shaft, m, is a knob, q, fixed
rigidly, whereby on grasping the knob the impression block, B, may be turned.
This knob has a short pin, p, which will fit in either one of the series of concentric
holes, P, on the tumble plate. The block, B, has a plural number of impression
faces, T, whereon a type plate of rubber may be secured; in the present instance
this block has six faces and therefore provides for carrying six different type
plates or impression plates. The number of concentric holes, p, in the tumble
plate should correspond with the number of impression or type faces on the
oscillatory block, which, as stated, is in the present instance six.
From this
description it will be seen that the knob, q, may be grasped and pulled so as
to compress the spiral spring, and thereby slide the block, B, and shaft, m,
endwise and release the pin, p₁, from the hole, p, it may be in, and thus allow

page_text: the block, B, to be turned so as to present a different impression face for use,
then the said pin, pl, may be set into another hole, p, so as to retain the desired
impression face in the proper relation for printing.
It is desirable to prevent the tumble plate, H, from being drawn away from the
yoke-arm, b, when the knob, q, is pulled, as just described; in other words when
the knob, q, is pulled it is desirable that the shaft, m, shall draw freely through
both the yoke-arm, b, and the tumble plate, HI, for the reason that only by the
tumble plate remaining stationary can the pin, p', on the knob be released or
detached from the hole, p, in the tumble plate. To ensure that this pin will
withdraw from the hole it is in, we provide as follows for keeping the plate, H,
stationary when drawing the knob the yoke-arm, b, has a groove or slot, r, and
the tumble plate, H, has a lateral hook, s, which takes in said groove or slot, thus
the plate is coupled or fastened to the yoke-arm without interfering with its freedom
of tumbling.
fits
The side plates, A, at their highest part and front end have a forward-projecting,
down-curved arm, u, provided with a rounded extremity, u', having a bearing, v,
for the journal, vl, of an ink-roller, G; the rounded extremity of each arm, u, is
larger than the ink-roller and has a radial slot or hole, a, and a spiral spring, y, is
in this slot or hole and bears against the journal, ». A part cylindric case,,
on the rounded extremity, u', and covers or encloses the ink-roller and also the
radial hole, x, and confines the spiral spring, y, therein; a screw, 21, secures the
case,, on said rounded extremity. By having the down-curved arns, n, to support
the inking-roller, the curved edge, o, of the tumble plate, EL, may take up under
said curve, as in Figure 1, and the said arms are not in the way of the knob, q.
By having the radial slot and spring, y, the ink-roller is kept pressed toward the
oscillatory block, B, and yet said ink-roller may yield or be pushed away by the
block, B, when it passes the roller. By having the rounded extremity, ', larger
than the ink roller, G, the partly-cylindric case, z, may be fastened on said
extremity and cover the ink-roller and yet leave it free to turn on its journals, v'.
A depressing knob, C, has a shank, C3, which is securel on the pivoted fra ne ;
by pressing down on this knob, C, an impression may be made by one of the type
faces on the oscillatory block, B.
In operation the impression block, B, makes at least a quarter turn and back
again every time the frame, C, is depressed, and this is the reason we term it an
oscillatory block.
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. In a hand stamp, the combination of a pivoted frame having yoke-arms;
plate ends having a lug, a; a shaft revoluble in said yoke-arms and having slight
endwise movement and carrying an impression block; a tumble plate loose on the
shaft and having a notch, w, to coact with said lug and a series of holes concentric
with the shaft; a knob on the end of the shaft and provided with a pin, p', to
engage one of the holes in the tumble plate; and means for holding the said loose
tumble plate stationary when drawing the shaft end wise so that the shaft may be
drawn freely through it in order to detach the knob-pin from one of the holes in
the plate, substantially as described.
2. In a 'hand stamp, the combination of the yoke-arms one of which has a
groove, plate ends having a lug, a; a shaft revoluble in said yoke-arms and
having slight end wise movement and carrying an impression block; a tumble plate
loose on the shaft and having a notch, w, and a series of holes concentric with the
shaft and provided with a lateral hook which engages the groove on the yoke-arm;
and a knob on the end of the shaft and provided with a pin, p³, to engage oue of
the holes in the tumble plate.
3. In a hand stamp, the combination of the side plates, A, provided at their
highest part with projecting down-curved arms each having a rounded extremity, u¹ ;

page_text: 5.
a bearing, v, and a radial hole, a; an inking roller, G, whose journals are in said
bearings; a spiral spring, y, in each radial hole and pressing against the journals;
a part cylindric case, z, fitted on the said rounded extremities and confining the
springs and covering the ink-roller; a pivoted yoke frame; and an oscillatory
impression block carried by said yoke frame.
Dated this 30th day of November 1895.
JAMES HENRY GRESSITT.
HENRY WILLIAM FOX.