Improvements in or connected with Typewriters.
Year: 1894

page_text: Date of Application, 16th Oct., 1894
Complete Specification Left, 16th July, 1895-Accepted, 21st Sept., 1895
Improvements in or connected with Typewriters.
A communication from abroad by THE REMINGTON-SHOLES TYPEWRITER
COMPANY, United States of America.
I, JAMES GRIEVE LORRAIN, of Norfolk House, Norfolk Street, Strand,
London, W.C. Chartered Patent Agent, do hereby declare the nature of this
invention to be as follows:-
My improvements relate particularly to mechanism for operating the bell which
indicates the approach of the carriage to the left hand end of its range of travel,
and to mechanism for varying such range.
In the accompanying drawings:
Figure 1 is a plan of the rear portion of a typewriter embodying my improve-
ment.
Figure 2 is a vertical section in line a-b of Figure 1 looking in the direction
indicated by the arrows in said Figure 1.
Figure 3 is a rear elevation exposing the bell and stop mechanism.
Figure 4 is a detail front elevation of the bell and stop mechanism.
Figure 5 is a section through the spring drum and adjacent mechanism.
A is the frame of the machine. A is the usual top plate of the machine. Bis
the platen carriage. This may be of any well known construction and may be
arranged to be reciprocated on one or more rails, C, supported upon the top
plate, A. B' is an arm reaching rearward from the carriage for the attachment of
the strap from the spring drum,
The movement of the carriage toward the right hand side of the machine is to
be restrained and controlled by any suitable form of escapement mechanism which
is operated in the well known manner by the operation of the key-levers of the
machine.
A hanger, A³, extends downward and to the left from the top plate, A', at the
left hand rear corner of the machine and has at its lower end a bearing, A', in
which rests a shaft, D. D' is a hollow drum loosely surrounding the shaft, D, at
the front of the hanger, A, and enclosing a coiled spring, S, the outer end of
which is attached to said drum and the inner end of which is attached to said shaft.
F is an arm attached immovably to the drum, D. At the rear of said hanger, a
plate, E, loosely surrounds said shaft, D. All of the margin of said plate,
excepting approximately the lower half is concentric with the shaft, D, and is
provided with gear teeth, E. Between the upper edge of said plate and the lower
side of the top plate, A', a gear rack, E, is arranged to mesh into the teeth of
said plate, E, and is supported in a fixed hanger, E, at one end and a hanger, E,
to which said rack is rigidly attached and which banger is in turn held by a
binding screw, A³, which extends through and is adapted to slide in a transverse
slot, A, in the top plate, A. By sliding said rack back and forth, said plate, E,
may be partially rotated and locked in any desired radial position within the
limits prescribed by the portion of the circle not provided with teeth, E.
At its lower portion, said plate, E, has an arm, E³, substantially in the plane of
said plate. A bell, e, is secured to the rear face of said plate. A hammer, E', is
hinged to the lower end of said arm so as to swing in a plane parallel to said plate
and into contact with said bell. A contracting spring, E7, is joined by one end to

page_text: said arm and by the other end to said hammer in such manner as to draw said
hammer toward said bell. Es, is an arm extending from the hammer toward the
front of the machine and resting normally against the right hand side of the
arm, E', and extending into the path of the arm, F, on the drum, D'. At the right
of the arm, E, is another arm, E, which supports the stop, E10, which is directed
toward the front of the machine and stands in the path of the
arm, F.
D2 is a strap attached to the drum, D', at d, and extending upward through the
opening, a', in the top plate, A', over the guide rail, D³, to the arm, B. When the
carriage is drawn to the right, the drum, D', is rotated and the spring, S, strained.
When the carriage is allowed to move to the left, the drum is rotated in reverse
direction until the arm, F, engages the arm, E8, and pushes the hammer, Eº,
from the bell. As the drum moves further, the arm, E8, slips over the arm, F,
allows the spring, E', to draw the hammer, E, into contact with said bell. On
rotating still further the drum brings the arm, F, into contact with the unyielding
stop, E. Further rotation is then prevented. The distance between the arm, EB,
and the stop, E, should be sufficient to provide a proper interval of time between
the ringing of the bell and the engagement of the drum by the stop, E10.
and
G is a wheel loosely surrounding the shaft, D, and provided with ratchet
teeth, and gear teeth, g. A dog, g³, is hinged to the side of the drum, D, and
having its free end engaging the teeth of said wheel. A spring, 93, is arranged to
hold said dog in contact with said teeth. Under this arrangement, the wheel, G,
is rotated with the drum, D', when the latter is rotated by the unwinding of the
spring, S. Said wheel, G, may be used for propelling ribbon-moving mechanism
in the usual manner.
At the rear end of the shaft, D, a ratchet wheel, H, is applied rigidly to said
shaft, and a dog, H, is hinged to the hanger, A³, in such manner as to allow said.
wheel to be moved only in the direction opposed to the spring, S. A handle, H',
may be applied to said wheel, H, for turning the latter.
A is a scale applied to the top plate, A', adjacent to the slot, A'. A pointer, a',
is applied to the screw, A³, in such manner as to be carried with the latter and the
rack, E, to indicate the position of the arms, E³, and E, with reference to the
total range of travel which may be given to the platen carriage.
To set the stop, E, to stop the platen carriage at the farthest point at the left
of the machine, said screw and pointer are moved to the left band end of the
scale, A. To lessen the movement of the platen carriage toward the left, said
screw and pointer are moved to the right in proportion to the extent to which it is
desired to limit such movement. It will be observed that the distance between the
arm, E, and the arm, E10, remains the same when the plate, E, is rotated. There-
fore, the bell will always ring at the same interval preceding the stopping of the
carriage by the arm, E.
A communication from abroad by THE REMINGTON-SHOLES TYPEWRITER 4
COMPANY, United States of America.
I, JAMES GRIEVE LORRAIN, of Norfolk House, Norfolk Street, Strand,
London, W.C. in the County of Middlesex, Chartered Patent Agent, 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 5
statement:
My improvements relate particularly to mechanism for operating the bell which

page_text: 5
adicates the approach of the carriage to the left hand end of its range
nd to mechanism for varying such range!,
In the drawings, filed with the Provisional Specification:
Fig. 1 is a plan of the rear portion of a typewriter embodying my improvement.
Fig. 2 is a vertical section in line a-b of Fig. 1 looking in the direction indicated
by the arrows in said Fig. 1.
Fig. 3 is a rear elevation exposing the bell and stop mechanism.
Fig. 4 is a detail front elevation of the bell and stop mechanism.
Fig. 5 is a section through the spring drum and adjacent mechanism.
A is the frame of the machine. A is the usual top plate of the machine. Bis
the platen carriage. This may be of any well known construction and may be
or more rails, C, supported upon the top
arranged to be reciprocated on one
plate, A. B' is an arm reaching rearward from the carriage for the attachment of
the strap from the spring drum.
The movement of the carriage toward the right hand side of the machine is to
be restrained and controlled by any suitable form of escapement mechanisin which
is operated in the well known manner by the operation of the key-levers of the
machine.
A hanger, A³, extends downward, and to the left from the top plate, A', at the
left hand rear corner of the machine and has at its lower end a bearing, A', in
which rests a shaft, D. D¹ is a hollow drum loosely surrounding the shaft, D, at
the front of the hanger, A³, and enclosing a coiled spring, S, the outer end of
which is attached to said drum and the inner of which is attached to said shaft.
F is an arm attached immovably to the drum, D'. At the rear of said hanger, a
plate, E, loosely surrounds said shaft, D. All of the margin of said .plate,
excepting approximately the lower half is concentric with the shaft, D, and is
provided with gear teeth, E. Between the upper edge of said pláte and the lower
side of the top plate, A', a gear rack, E³, is arranged to mesh into the teeth of
said plate, E, and is supported in a fixed hanger, E, at one end and a hanger, E*,
to which said rack is rigidly attached and which hanger is in turn held by a
binding screw, A', which extends through and is adapted to slide in a transverse
slot, A, in the top plate, A. By sliding said rack back and forth, said plate, E,
may be partially rotated and locked in any desired radial position within the limits
prescribed by the portion of the circle not provided with teeth, E'.
is
At its lower portion, said plate, E, has an arm, E', substantially in the plane of
said plate. A bell, e, is secured to the rear face of said plate. A hammer, E*,
hinged to the lower end of said arm so as to swing in a plane parallel to said plate
and into contact with said bell. A contracting spring, E', is joined by one end to
said arm and by the other end to said hammer in such manner as to draw said
hammer toward said bell. Es is an arm extending from the hammer toward the
front of the machine and resting normally against the right hand side of the
arm, E³, and extending into the path of the arm, F, on the drum, D'. At the right
of the arm, E, is another arm, E', which supports the stop, E, which is directed
toward the front of the machine and stands in the path of the arm, F.
aud
D is a strap attached to the drum, D', at d, and extending upward through the
When the
opening, a', in the top plate, A', over the guide rail, D³, to the arm, B¹.
carriage is drawn to the right, the drum, D', is rotated and the spring, S, strained.
When the carriage is allowed to move to the left, the drum is rotated in reverse
direction until the arm, F, engages the arm, E8, and pushes the hammer, E, away
0 from the bell. As the drum moves further, the arm, E8, slips over the arm, F,
On
allows the spring, E', to draw the hammer, E, into contact with said bell.
rotating still further the drum brings the arm, F, into contact with the unyielding
stop, E. Further rotation is then prevented. The distance between the arm,
and the stop, E, should be sufficient to provide a proper interval of time between
the ringing of the bell and the engagement of the drum by the stop, E.
G is a wheel loosely surrounding the shaft, D, and provided with ratchet
teeth, g,
and gear teeth, gl. A dog, g³, is hinged to the side of the drum, T¹, and
E³,

page_text: having its free end engaging the teeth of said wheel. A spring, 93, is arranged to
hold said dog in contact with said teeth. Under this arrangement, the wheel, G,
is rotated with the drum, D', when the latter is rotated by the unwinding of the
spring, S. Said wheel, G, may be used for propelling ribbon-moving mechanism
in the usual manner.
At the rear end of the shaft, D, a ratchet wheel, H, is applied rigidly to said
shaft, and a dog. H', is hinged to the hanger, A3, in such manner as to allow said
wheel to be moved only in the direction opposed to the spring, S. A handle, H2,
may be applied to said wheel, H, for turning the latter.
A is a scale applied to the top plate, A', adjacent to the slot, A. A pointer, a³,
is applied to the screw, A', in such manner as to be carried with the latter and the
rack, E, to indicate the positions of the arms, E³, and E10, with reference to the
total range of travel which may be given to the platen carriage.
To set the stop, E10, to stop the platen carriage at the farthest point at the left
of the machine, said screw and pointer are moved to the left band end of the
scale, A. To lessen the movement of the platen carriage toward the left, said
screw and pointer are moved to the right in proportion to the extent to which it is
desired to limit such movement. It will be observed that the distance between the
There-
arm, E, and the arm, E, remains the same when the plate, E, is rotated.
fore the bell will always ring at the same interval preceding the stopping of the
carriage by the arm, E10.
Having now particularly described and ascertained the nature of my said inven-
Lion and in what manner the same is to be performed, I declare that what I
claim is:
In a typewriter, the combination with the frame of the machine, of a suitably
mounted platen carriage, a spring drum having a part for striking the bell-hammer
hereinafter mentioned, a suitable connection between said spring drum and said
carriage, a part adjustable about the axis of said drum, a bell-hammer supported
by said part eccentric to the axis of said drum, and a bell, substantially as set
forth.
2. In a typewriter, the combination with the frame of the machine, of a suitably
mounted platen carriage, a spring drum having a part for striking the bell-hammer
and engaging the stop hereinafter mentioned, a suitable connection between said
spring drum and said carriage, a part adjustable about the axis of said drum, a
bell-hammer and a stop supported by said part eccentric to the axis of said drum,
and a bell, substantially as set forth.
3. In a typewriter, the combination with the frame of the machine, of a carriage,
a bearing supported by said frame, a shaft extending loosely through said bearing
a drum loosely surrounding said shaft and suitably connected to said carriage and
enclosing a spring having one end secured to said shaft and the other end secured
to said drum, a plate, E, loosely surrounding said shaft and bearing a bell, e,
mechanism for securing said plate in different position radial to said shaft, a stop
attached to said arm and extending into the path of a portion of said drum, and a
bell-hanmer so hinged as to be adapted to strike said bell and provided with a part
extending into the path of a portion of said dram, substantially as set forth.
4. In a typewriter, the combination with the frame of the machine, of a carriage,
a suitably journaled spring drum, a bell, a plate radially adjustable upon the axis
of said drum and having a series of teeth upon its circumference, an adjustable
gear engaging said teeth, and a bell-hammer supported by said plate eccentrically
to the axis of said drum, substantially as set forth.
5. In a typewriter, the combination with the frame of the machine, of a carriage
a suitably journaled spring drum, a bell, a plate radially adjustable upon the axis
of said drum and having a series of teeth engaging said drum, a bell-hammer and
a stop supported by said plate eccentrically to the axis of said drum, substantially
as set forth.
6. In a typewriter, the combination with the frame of the machine, of a bel

page_text: and bell-hammer, a support to which said bell and bell-hammer are secured, said
support being rotatably secured to said frame eccentric to said bell and hammer, a
platen carriage spring drum, a part connected with said platen carriage spring drum
and arranged to traverse a path substantially concentric to the axis of said support.
and into which said bell-hammer extends, substantially as set forth.
7. In a typewriter, the combination with the frame of the machine, of a bell,.
bell-hammer, and stop, a support to which said bell, bell-hammer, and stop are
secured, said support being rotatably secured to said frame eccentric to said bell,.
bell-hammer, and stop, a platen carriage spring drum, a part connected with said
platen carriage spring drum and arranged to traverse a path substantially concentric
to the axis of said support and into which said bell-hammer and stop extend,.
substantially as set forth.
J. G. LORRAIN.