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Патент USA US2117451

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May 17, 1938.
‘ w. H. ‘ROBERTSON'
2,117,451
CASH REGISTER
Original Filed Jan. 10, 1930
2 Sheets-Sheet 1
duo: “(4:
May 17, 1938.
H. ROBERTSON
2,117,451
CASH REGISTER
Original Filed Jan. 10, 1930
2 Sheets-Sheet 2
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05651179
By
William H. Robertson
0587 1179
Hi8 d?iozmq
2,117,451‘:
Patented May 17, 1938
UNITED STATES PATENT OFFICE.
2,117,451
CASH REGISTER
William H. Robertson, Dayton, Ohio, assignor to
The National Cash Register Company, Dayton,
Ohio, a corporation of Maryland
Original‘ application January 10, 1930, Serial No.
419,938. Divided‘ and this application June 21,
1935, Serial No. 27,619. In Canada March 24,
1930
(Cl. 101-93)
11 Claims.
This, invention relates to printing mechanism
for cash registers and like machines, but more
an issuing detail strip which is identical in every
way to the permanent detail strip.
particularly to impression hammer controlling
mechanism for machines of the type illustrated
5 and described in Letters Patent of the United
States No. 1,816,263, issued August 4, 1931, and
United States Patent No. 1,929,652 issued October
10, 1933 both to William H. Robertson, and, in ap
plication for Letters Patent of the United States,
10 Serial Number 419,938 ?led January 10, 1930 by
William. H..-Robertson, now Patent No. 2,056,485.
This application isa division of the above named
application.
One object of this. invention is to provide ma
15 chines. of the character disclosed in the above
patents and application with mechanism to pre
vent the rebounding of the impression hammers
and thereby preventing the possibility of blurring
the record material.
Another object is to contrive mechanism to
20
govern the number of impression strokes the
printing hammers make during, a single machine
operation.
Still another object is to devise mechanism to
2
control the effectiveness of one‘of, two printing
platens carried by one of the impression ham
mers.
GENERAL DESCRIPTION
The printing mechanism used in the machine
chosen to illustrate one form of the present in
vention is identical with that disclosed in the
parent application and includes two groups. of
type carriers simultaneously set by differential
mechanism under control of depressed amount 10
keys in adding operations and under control of
the totalizer wheels in totalizing operations. One
printing hammer is provided to take impressions
from one group of type carriers on an issuing de
tail strip and another impression hammer is pro 15
vided to take a plurality of impressions at each
operation of the machine from the other group of
type carriers, one of such impressions being made
on an issuing ticket and another on a permanent
detail strip.
The lower hammer makes one printing stroke
each machine operation to effect a single impres
sion on the issuing detail‘ strip. However, the
upper hammer may be controlled at will to make
one or two printing strokes. during each opera—
tion of the machine. When the upper hammer
makes two printing strokes, the ?rst impression
25
With these and incidental objects in view, the
invention includes certain novel features of con
struction and combinations of parts, the essential
3 O elements of which are, set forth in appended
is made upon an issuing ticket, and after this
ticket is ejected from the path of the hammer
claims and a preferred form or embodiment of
which is hereinafter described with reference to
the drawings which accompany and form a part
of this speci?cation.
35
In said drawings:
sitioned to make only one printing stroke, the feed»
of the issuing ticket is disabled and the impres
sion is made on the permanent detail strip.
As the issuing ticket is only about half as 35
wide as the permanent detail strip and covers
only a part of the type carriers, it is necessary
to provide means to prevent a double impression being made upon the part of the detail strip.
not covered by‘ the issuing ticket when the upper 40
hammer makes two printing strokes. This is
accomplished by means‘of a shiftable platen block
carried by the upper impression hammer which
Fig. 1 is a side elevation as observed from the
right of the machine, depicting the impression
40
mechanism and the operating, means therefor.
Fig. 2 is a detail view of the rebound preventing
mechanism for the upper impression hammer.
Fig. 3 is a detail view of the rebound preventing
mechanism for the lower impression hammer.
Fig.‘ 4 is. a facsimile of a printed ticket or
45 postage label issued by the machine of this in
vention.
Fig. 5 is a side elevation of the mechanism for
controlling the impression strokes of the upper
impression hammer,
50
Fig. 6 is a detail view of the operating mech
anism associated with the hammer disabling
mechanism pictured in Fig. 5.
.
Fig. '7 is a top plan view of the upper impressio
hammer and portrays in particular the mech
55
anism associated with the shiftable platen block
carried by said‘ hammer.
Fig. 8 is a facsimile of a fragment of a per
manent detail strip used in the machine of this
60 invention. Fig. 8 also represents a fragment of
the impression is duplicated on the permanent
detail strip.
When the upper hammer is‘ po
cooperates with the portion of the permanent
detail strip and type carriers not covered by the
issuing ticket. Prior to the ?rst impression, the
shiftable platen block is moved away from the
type carriers to prevent an impression‘ being made
on the permanent detail strip at this time. Prior
to the second printing stroke of the hammer the
movable impression block is shifted. back to
effective position.
The impression hammers disclosed herein are
actuated by strong springs, which are‘cocked by
a camming device and suddenly released. Just 55
before the hammers contact the record material,
the action of the strong spring is abruptly ter
minated; the momentum of the hammers being
suf?cient to complete the impression stroke. The
force of the impact of the resilient platen blocks 60
2
2,117,451
against the type carriers is sufficient to cause
the hammers to rebound more or less violently
and this rebound reacts against the spring actu
ating means sufficiently to make a light second
impression stroke, which almost invariably blurs
the record material. In the present application,
mechanism is disclosed which makes it impos
sible for the hammers to make a rebounding re
peat stroke.
10
For a complete disclosure of the machine and
particularly the printing mechanism to which the
instant invention is applied, reference may be
had to the parent application cited at the’ begin
ning of this speci?cation.
15
DETAILED DESCRIPTION
Type wheels
Referring to Fig. 1, groups of type wheels 515
and 516 are rotatably supported on rods 5'11 and
518 projecting from a printer frame (not shown)
' suitably secured to a right side frame 36 and
properly spaced therefrom. A shaft 215 journaled
in the main frames of the machine, and a plu
rality of telescoping tubes 214 supported by said
shaft extend from the accumulating section of
the machine through the frame 30 and into the
printing mechanism. The shaft 215 and the tubes
40
clockwise, ?exing the spring 628.
The arm 631
carries a stud 635 which in cooperation with a
projection 636 of the arm 619 imparts counter
clockwise movement to said arm 6 I 9 and the ham
mer 612 to flex the spring 620 when the lever 621
receives clockwise movement as explained directly
above.
During rotation of the shaft 216 the lobes 633
and 634 move beyond the roller 636 and into con
tact with a nose 631 of the arm 631. When the
nose 631 rides off the lobes 633 and 634 the springs
628 and 62D sharply retract the lever 621 and _.
the arm 619 until such movement is arrested by '
parted thereto by the machine differential mech
into contact with the type wheels to record the 5:7
anism, is transmitted to the type wheels 515 and
516 and sets these wheels to print characters cor
responding to the depressed amount keys in add
ing operations or the totalizer‘ wheels in totaliz
transaction.
ing operations.
projecting from the printer frame (not shown).
45 The inking ribbon 585 is directed by various studs
and plates carried by an ink ribbon support plate
(not shown) between the type wheels 515 and
516 and their respective impression hammers.
Mechanism is provided to feed the ribbon and to
reverse the direction of travel of said ribbon.
However, such mechanism is not disclosed here
in, but reference may be had to the U. S. Patent
No. 1,929,652 issued October 10, 1933 to William
H. Robertson, for a full disclosure of this mecha
nism.
Impression hammers
The printing mechanism of the instant machine
includes a lower impression hammer 612 and an
upper impression hammer 613 pivoted respective
ly on studs 363 and 622 secured in the frame 36
and carrying respectively resilient impression
65
The main drive shaft 216 makes a complete
counterclockwise revolution each machine oper
ation and during this rotation lobes 633 and 534, 11)
on the cam 632, in cooperation with the roller
6311 rocks the lever 621 and the hammer 613
214 have fast on the outer ends thereof gears 286
meshing with pinions 581, one of which is secured
on the side of each of the type wheels 515. The
gears 2811 are also connected by intermediate
gears 582, to pinions 584 secured to each of the
type wheels 516. By this means the differential
positioning of the shaft 215 and tubes 214, im
A reversible inking ribbon 585 is alternatively
60
to normally maintain a roller 636 on a forwardly
extending arm 631 of said lever in contact with Ch
the periphery of a hammer operating cam 632
secured on the main drive shaft 216.
the nose 631 contacting the low surface of the
cam 632 and the arm 619 striking the abutment
621. The hammers 613 and 612 move in unison
with their respective levers 621 and 619 until the
movement of said levers is terminated in the
manner explained above. However, said ham"
mers have sufficient momentum to carry them
on, causing their respective platens to carry the
record material and the inking ribbon sharply
unwound from and wound onto spools 586 and
581 supported respectively on studs 588 and 589
55
and said arm 625. A strong spring 628, one end
of which is attached to a rearwardly disposed arm
of the lever 621 urges said lever counterclockwise
blocks or platens 611) and 611. A spring 616 is
tensioned to urge the hammer 612 counterclock
wise to normally maintain a stud 611 in a down
wardly extending arm 614 of said hammer in
contact with a projection 618 of a hammer oper
ating arm 619 fulcrumed on the stud 303 and
urged clockwise into contact with a stop stud or
70 abutment 621 by a comparatively strong spring
620. A downwardly extending arm 625 of the
hammer 613 carries a stud 624 normally main
tained in contact with a projection 626 of a ham
mer operating lever 621 loose on the stud 622,
by a spring 623 tensioned between said lever 621
It is desirable that the impression hammer 612
make only one printing stroke to make a single
impression upon an issuing detail strip 112, while
the hammer 613 is making two printing strokes. ~11)
The hammer 612 is prevented from making the
?rst impression stroke by the high portion of a
segment 638 secured to the cam 632 in cooper
ation with an arcuate surface of a projection 639
of the arm 619. During rotation of the main 4-5
shaft 216 the high portion of the segment 638
passes under the projection 639 before the nose
631 rides off the ?rst lobe 633 of the cam 632.
This blocks clockwise imprinting movement of
the arm 619 and the hammer 612 under in?uence '
‘of the spring 620 and it is therefore evident that
said hammer 612 is thus prevented from making
the initial imprinting movement in unison with
the hammer 613. Just before the nose 631 rides
off the lobe 634 to effect a second impression
stroke of the hammer 613, the high surface of
the segment 636 moves beyond the projection
639, thus permitting the hammer 612 to move in
unison with the hammer 613 during its second
printing stroke to make a single impression upon 60
the issuing detail strip 112.
Mechanism to prevent rebound of the printing
hammers
When the hammers 612 and 613 (Fig. 1) make 65
a printing stroke, sharp contact of their respec
tive platens 6111 and 611 with the type carriers
and the resiliency of said platens causes said
hammers to rebound sharply. This causes the
studs 611 and 624 to contact the projections 618 V
and 626 with suiiicient force to slightly rock the
arms 619 and 62? against the tension of their
respective springs 62!] and 628.
The resulting
return movement of the arms 619 and 631 is suffi
cient to cause the hammers 612 and 613 to make
2,112,451
a second‘ light impression stroke, commonly re
ferred‘ to as a rebound‘ stroke, which generally
results in a blurring or smudging of the ?rst im
pression made on the record material. In the
present machine this undesirable condition has
been overcome by means of individual rebound
preventers associated with each of the hammers.
These rebound preventers positively block‘ any
rebounding movement of the impression ham
10 mers subsequent to an impression stroke.
Both
of the rebound preventers operate upon the same
principle, but due to difference of structure there
in it is deemed advisable to describe each of
them in detail.
A ?attened pin 645- on a downwardly extending
15
arm 646/ of the hammer 6I2‘ normally lies in a
recess formed in the upper edge of a rebound.
preventing arm 641 (Figs. 1 and 3) pivoted on a
stud 646 extending between the frame 36 and
20 the printer frame (not shown). The pin 645
also lies within a larger recess in a detent slide
649‘, slidably supported by the stud 648 and a
stud 656 in the arm 641, said recess being large
enough, topermit relative movement of the stud
25 645 thereto. counterclockwise cocking move
ment of the hammer 6I2 causes the stud 645 in
cooperation with an inclined wall of the recess
in. the arm 641 to rock‘ said arm and the slide
649 counterclockwise against the tension of a
30 spring 653. Counterclockwise movement of the
slide 649 moves a projection 652 thereon below a
?attened stud 651 secured in‘ the frame 30. Im
mediately thereafter‘ continued counterclock~
wise movement of the arm 6I2 causes the stud
35 645 to engage the rearwardly disposed wall of
the recess in the slide 649 to shift said slide rear.
wardly to move the projection 652 thereof di
rectly underneath. the stud 65L This. retains the
forward wall. of the recess in the arm 641 out of
40 the path of the stud 64,5 upon return printing
movement of the hammer 6I2' under in?uence of
the spring 620' and allows said stud to. engage the
forward ‘wallv of the recess in the slide 649 to
shift said slide forwardly to move’ the projection
45 652 out of the path of the stud 65I. The spring
653‘ immediately returns said slide and the arm.
641. upwardly until the top edge of the arm 641
contacts. the stud645. When the printing ham
mer 612' recoils from its impact with the type
50 carriers, in the manner explained above,. the stud
645 moves off. the top edge of the arm 641 and
into‘ the recess therein. permitting said arm and
the slide 649 to be returned full. distance up
wardly by the spring 653 to. the position here
55 shown. This moves the forward wall of the re
cess in the slide 641 in the path of the ?attened
surface of the stud 645 to positively block rebounding. movement of theihammer M2.
The rebound preventer for the hammer 6I3
60 (Figs. 1 and 2) functions similarly tov the rebound
preventer for the hammer 6I2. However, due to
the fact that this rebound preventer varies in
structure from the one just described, it is
deemed advisable to give a detailed description
65
thereof. When the lobes 633 and 634 of the
cam 632 retract the hammer 6I3‘ clockwise, pre
paratory to a printing stroke of said hammer, a
stud 654 in an extension 655 of said hammer‘ in
70 cooperation with an angular surface on a re
3.
with the stud 651‘ and a stud 658 in a rearward‘
arm of said lever 656,. by means of said stud 658.
Clockwise movement of the lever 656 and the
slide 659' ?exes a spring 660 and rocks a shoulder
66I= of said slide 6.59 out of the path of or beneath
a stud. 662 projecting from the frame 30. Con
tinued a clockwise movement of ‘the hammer 6I3
causes the stud 654 to engage the rearward wall
of a notch in the forward end of the slide 659 and.
shifts said. slide rearwardly to move the shoul
der or step 661 beneath the stud 662‘, to restrain
return movement counterclockwise of the lever
666 and slide 659 under in?uence of the spring
666 when the hammer starts its imprinting move
ment counterclockwise. The stud 662. (Fig. 2)
retains the slide 659 ‘and the lever 656- in clock
wise position- during the greater part of the im
printing stroke of the hammer 6I>3 until the stud
654 moves beneath a hook-shaped projection 644
of said lever 656. ‘Near the termination of? its
counterclockwise movement the stud 654 en
gages the inner wall of the notch in the slide‘
659 and shifts said slide forwardly to move the
shoulder 66! from beneath the stud 662, thus
permitting the spring 660 to return the lever 656
counterclockwise until the projection 644 rests
on top of the stud 6541.
Recoil clockwise of the
hammer 6I3 caused by impact of the platen 6“
with the type carriers causes the stud 654 to ride
off of the lower surface of the projection 644 and
the spring 660 immediately returns said lever
656 to normal position to place the projection 644
in the path of the stud 654 to positively block
rebounding movement of the hammer 6I3.
Control of ticket printing and issuing mecha
nism by transaction keys
Depressing the transaction key 44 (Fig. 5)‘ con
trols the printing mechanism to issue a permit
ticket 691- (Figs. 1 and 4). Depressing any one
of the three keys 45, 46 or 41 operates‘mechanism
that prevents the permit ticket printing hammer‘
6I3 from making its ?rst impression stroke and
renders ineffective the permit ticket feeding
mechanism.
The keys 45, 46‘ and 41 each- carry a stud I03
which cooperate respectively with the angular
camming surfaces of three tooth-shaped projec
tions of a sector I65 formed on the outer end of
an arm I66‘ fulcrumed on a differential support
50.
ing shaft I49 journaled in the main frames of
the machine. Depressing any one of the keys
46, 46 or 41 by means of the stud I63 in cooper—
ation with the angular ‘camming surface rocks
the sector I65 and‘ the arm I66 clockwise which
movement by means of a link I61, connected be
tween the sector I65 and. the upper end of’ an
arm I68, is transmitted to said arm I68. The
arm I68 is secured to a short shaft I69 journaled
in the right frame 30 and a bracket not shown. 60
Consequently said shaft moves in unison with the
arm I 68. Clockwise movement of the arm I68
shifts a pitman 663 rearwardly, the forward‘end
of said pitman being pivoted at 615 to said arm
I66 and the rearward end of said pitman being
slotted to embrace a stationary stud 664 project
ing inwardly from the frame 30. Rearward
movement of the pitman 663 causes a downward
projection 665 thereof in cooperation with a stud
666 in‘an arm 661 loose on a rod 566 supported
bound preventing lever 656, rotatably' supported
by the main frame, to shift said arm 661 clock
on a stud 651 secured in the frame 36, rocks said
wise.
lever clockwise. Clockwise movement of the lever
656 is transmitted to a detent slide 659, slidably
15 mounted by means of slots therein in. cooperation
id
The arm 661 is ?exibly connected by a spring
668 to a hammer arresting lever 669 also. loose
on the rod 566. The spring 668 normally main 75
4.
2,117,451
tains a raised surface of the arm 661 in contact
with a stud 616 secured in the lever 669. ‘The
lever 669 carries a stud 610 which extends with
in a slot 61I in the lower end on a link 612
(see also Fig. 1) the upper end of said link be
ing pivotally connected to a crank 613 secured
on a shaft 439 journaled in the right and left
indicator end frames, the right one (35) of which
is here shown in dot and dash lines.
_
counterclockwise rotation of a shaft 213 (Fig.
6), as explained fully in the parent application,
rotates companion plate cams 421 and 426 in
transaction key 44, in a manner explained in the
parent application, releases any depressed trans
action key 45, 46 or 41, thus permitting a spring
I1I (Fig. 5) in cooperation with a crank I12 se
cured to the shaft I69 to return said shaft, the
lever I68, and the pitman 663 and the sector I65
to normal position as here shown. The tension
ing arm 661 returns in unison with the pitman
663 to relieve the tension of the spring 668, thus
preventing clockwise movement of the lever 669 10
when the link 612 is lowered in the manner ex
plained above.
When the lever 669 remains in
unison therewith.
The peripheries of the cams 421 and 428, in
15 cooperation with their respective rollers 429 and
its ineffective position, the slot 61I in the link
612 prevents the up-and-down movement of said
link from imparting movement to the stud 619
436 on the Y-shaped'arms of a cam lever 43I ful
crumed on a rod 432, rocks said lever ?rst counter
clockwise and then back to normal position, as
here shown.
and lever 669. It is therefore to be understood
that when the machine is operated with the
20
Oscillating movement of the lever 43I ?rst
lowers and then raises a pitman 433, the lower
end of which is pivoted to said lever 43I, and the
upper end of said pitman being guided by a slot
therein in cooperation with a rod 435 extending
25 between the indicator frames. Oscillating move
ment of the pitman 433 by means of a stud 436
in the upper end thereof, in cooperation with
a horizontal slot in a crank 436 secured on the
shaft 439 rocks said crank and said shaft ?rst
30 counterclockwise and then back to normal posi
tion. Initial movement counterclockwise of the
shaft 439 (Figs. 1 and 5) and the crank 613
vmoves the link 612 downwardly thus allowing the
spring 668, which has been tensioned by clock
wise movement of the arm 661 under influence
of the pitman 663, to move the lever 669 in uni
son with the link 612. Clockwise movement of
the lever 669 moves a surface 614 on the broad
end thereof opposite the stud 654 in the hammer
6I3 to block clockwise retracting or cocking
movement of said hammer, thereby preventing
said hammer from being in?uenced by the ?rst
lobe 633 of the cam 632 in cooperation with the
lever 621 and the spring 628.
Before the second lobe 634 of the cam 632 im
parts cocking movement to the lever 621 the com
panion cams 421 and 428 in cooperation with the
lever 43I shifts the pitman 433 upwardly to re
turn the shaft 439, the crank 613 (Fig. 1) and
50 the link 612 to normal position as here shown.
45
transaction key 44 depressed, the hammer 6I3
is free to make two impression strokes, the ?rst
of which causes a record of the transaction to be
imprinted upon the permit ticket 691 (Figs. 1
and 4) and the second upon the permanent de
tail record strip 199 (Figs. 1 and 8).
Shiftable platen for the permit ticket printing
hammer
By referring to Figs. 1 and 7 it will be seen
that the permanent detail strip 199 is guided
by the rollers 965 around the head of the ham
mer 6I3 and maintained in close relationship 3O
to the platen block 6| I.
It will likewise be ob
served that the issuing ticket 691 is fed upward
ly between the inking ribbon 585 and the per
manent detail strip 199. Therefore when the
transaction key 44 (Fig. 5) is depressed, the web
of the issuing ticket 691 is fed upwardly between
the ribbon 585 and the permanent detail strip
199. Consequently the ?rst impression will be
made on the issuing ticket 691. Immediately
after being imprinted the ticket 691 is ejected 40
from the machine, thus permitting the second
impression to be made on the permanent detail
strip 199. When one of the transaction keys 45,
46 or 41 is depressed, the feed for the issuing
ticket 691 is disabled; consequently the web of
said ticket is not fed upwardly between the rib
bon and the permanent detail strip. In such a
case there is no need for two impression strokes
of the hammer M3 and therefore the ?rst im
pression stroke of the hammer is disabled in
the manner explained above and the second im
pression stroke causes the transaction to be re
Return movement upwardly oi the link 612 (Fig.
5) returns the disabling lever 669 counterclock
wise to normal position to remove the surface
614 thereof from the path of the stud 654. The
55 hammer 6I3 then makes its single printing stroke
corded upon the permanent detail strip 199.
By referring to Fig. 7 it will be noted that the
ticket 691 covers only part of the type wheels
under influence of the lobe 634 of the cam 632 to
make an impression upon the permanent detail
strip 199 (Fig. 1) which is unwound from a sup
manent detail strip 199. Therefore to prevent
the ?rst stroke of the hammer from making an
ply roll, (not shown) threaded around various
60 guide studs and two rollers 805 turnably sup
ported by plates 896 (see also Fig. 7) secured to
the hammer 6I3 and ?nally wound upon a re
ceiving roll (not shown). For a complete de
scription of the permanent detail strip feeding
65 mechanism reference may be had to the parent
Patent No. 2,056,485.
The transaction keys 45, 46 and 41 (Fig. 5) are
stay-down keys and are therefore not influenced
by the automatic key releasing mechanism.
It is
therefore evident that as long as one of these
keys is depressed the pitman 663 retains the arms
661 in clockwise position to tension the spring 668
and consequently the lever 669 will operate each
machine operation to block the ?rst imprinting
movement of the hammer 6| 3. Depressing the
516 and is only about half as wide as the per
imprint upon the portion of the permanent rec
ord strip not covered by the issuing ticket 691
a shiftable platen is provided which is moved
to an ineffective position during the ?rst print
ing stroke of said hammer. The shiftable platen
and associated mechanism will‘ now be described.
Directing attention to Figs. 1, 5 and '1, the im 65
pression hammer 6I3 has at its upper end a
laterally extending table 685 with an upwardly
extending rib 684 extending the full width of
the type wheels 516. Substantially half of the
rib 684 (Fig. 7) is channeled to receive the im 70
pression block 6“ while the other half of said
rib is cut away to provide room for a platen
supporting bar 68I channeled to receive a platen
block 689 adapted to make imprints upon the
portion of the permanent detail strip 199 not 75
2,117,451
covered by the issuing ticket 691. The platen
bar 68! is supported by the forward ends of
plungers 682 and 683 which ‘extend.- through
holes in the rib ‘684 and are further supported
Cl by holes in ears 686 projecting from a bracket
'68‘! secured to the table ‘685. Compression
springs 688 wound around the plungers 682 and
683 are con?ned between the rail 684 and collars
689 one of which is secured to each of the plung
10 ers 682 and 583. I The springs 688 urge the plung
ersl 682 and 683 rearwardly as viewed in Fig. 1
and downwardly as viewed in Fig. '7, to normally
maintain rollers, turnably mounted in slots in
the ends of said plungers, in contact with the
15 peripheries of symmetrical cams 696.
The cams 690 are secured on a shaft 69I turn
ably and shiftably supported in substantially
horizontal slots in a pair of upturned ears 692
of the bracket 681. Loose on the shaft 69]
are two eccentrics 105, which in cooperation
with studs 168 in extensions of the ears 692 pro
vide a means of adjusting the shaft 69! and the
cam 690 in relation to the plungers 682 and 683;
thus providing a means of adjusting the platen
bar Bill and the platen 680 relatively to the type
wheels 516 to control the impression. The ec
centrics 105 have knurled rims 106 which pro
vide an easy means of adjusting said eccentrics,
and which in cooperation with retaining‘ clips
10‘! (Fig. 1) secured to the table 685 provide a
means of retaining the eccentrics in adjusted
position.
Secured on the righthand end of the shaf
69! (Figs. 1 and'l) is a crank 695 connected by
a link 694 to an arm 693 secured on a shaft 426
journaled in the indicator frame. Also secured
on the shaft 426 (Fig. 6) is a crank 431 slotted
to receive the stud 436 in the pitman 433.
As explained hereinbefore, depressing the
transaction key 44 (Fig. 5) conditions the print
ing mechanism to make two impressions, one on
I. Ll
the issuing ticket 691 (Fig. 7) and the other on
the permanent detail strip 199. The ?rst'im
pression is made on the ticket 691 after which
said ticket is severed from its web and ejected
from the machine, and the second impression is
made on the permanent detail strip 199. Prior
to- the ?rst impression stroke of the hammer 6l3
the cams 421 and 428 (Fig. 6) in cooperation
with the lever 43l shift the pitman 433 down
wardly to rock the crank 43'! and the shaft 426
a slight distance clockwise. The arm 693 (Fig.
1) and the link 664 transmits clockwise move
ment of the shaft 426 to the arm 695 and the ec
’ centric shaft 66L Clockwise movement of the
shaft 69l moves the high portions of the cams
696 away from the plungers 682 and 683 where
(H
5
conditioned by depression of one of the transac
tion keys 45, 46 or 41 (Fig. 5) ‘for a single im
pression, still its operation at this time does no
harm whatever.
While the form of mechanism herein shown
and described is admirably adapted to ful?ll the
objects primarily stated, it is to be understood
that it is not intended to con?ne the invention
to the one form‘or embodiment herein disclosed,
for it is susceptible of embodiment in various 10
forms, all coming within the scope of the claims
which follow.
What is claimed is:
1. In a machine of the class described; the
combination with ‘a manipulative device; a print 15
ing hammer; and means to cause the printing
hammer to deliver a plurality of impression blows
at each operation of the machine; of normally
idle means to block the printing hammer against
operation; a tension member to shift the blocking 20
means to effective-position; means controlled by
the manipulative device to actuate the tension
member; and means to release the blocking
means for movement into blocking position and
then restore said blocking means into idle posi 25
tion.
2..In a machine of the class described, the
combination with a printing hammer; a manipu
lative device; and means to cause the hammer to
deliver a plurality of impression blows at each 30
operation of the machine; of normally idle pre
venting means to render the printing hammer in
effective; means controlled by the manipulative
device to control the operation of the preventing
means; and means timed with relation to the
hammer-operating means, to release the prevent
ing means for operation prior to an operation of
the hammer and to restore the preventing means
to ineffective position after the operation of the
hammer.
operation of the machine; of a normally ineffec—
tive means to disable the hammer; a tension arm;
a spring connecting the disabling means and the
tension arm; means operated by the manipula
tive device to shift the tension arm to place addi
tional tension on the spring; and means nor
means‘ against operation and operable during a
machine operation to release said disabling
means at a predetermined time.
4. In a machine of the class described; the 55
combination with a manipulative device; a print
ing hammer; and means to cause the hammer
to deliver a plurality of impression blows at each
operation of the machine; of a normally ineifec~
type carriers so that the ?rst impression will
not be made on the portion of the detail strip
199 not covered by the issuing ticket 691. Im
trolled by the manipulative device to operate the
and before the second impression, the cams 421
and 428 and connected mechanism return the
shafts 426 and Bill counterclockwise to normal
position as here shown, whereupon the cams 690
restore the platen bar Bill to printing position
so that the second impression will be made upon
70 the full width of the permanent record strip 199.
The mechanism just described for shifting the
platen bar 68l (Fig. 7) out of and into printing
position functions every machine operation, and
while it is unnecessary for this mechanism to
75 operate when the printing mechanism has been
50
mally in position to restrain said disabling
upon the springs 688 (see also Fig. 7) shift said
plungers and the platen bar 68I away from the
mediately after the ?rst impression is completed
.40
3. In a machine of the class described; the
combination with a manipulative device; a print
ing hammer; and means to cause the hammer to
deliver a plurality of impression blows at each
tive means to disable the hammer; means con
60
disabling means; and restraining means to re
lease the disabling means for operation before
the time of the ?rst impression blow of the ham
mer and to restore the disabling means to ineffec
65
tive position before the time of the second oper
ation of the hammer.
5. In a machine of the class described; the
combination with a manipulative device; a print
ing hammer; and means operable at each opera 70
tion of the machine to cause the printing hammer
to deliver a plurality of impression blows; of a
normally idle means to disable the hammer; a
tension arm, a spring connecting the tension arm
and the disabling means; a pitman; means con 75
6
2,117,451
trolled by the manipulative device to actuate the
pitman and rock the tension arm; a link coacting
with the disabling means to restrain the disabling
means against operation; and means to operate
m. the link to release the disabling means to the ac
tion of the spring before the time of occurrence
of one of the impression blows and to restore
the disabling means to idle position thereafter.
6. In a machine of the class described; the
combination with type elements; a printing ham
mer; and a platen; of plungers carried by the
hammer to adjustably support the platen; re
silient means tending to retract the adjustable
platen; a shaft; restraining members on the
15 shaft coacting with the plungers to- normally
maintain the adjustable platen in printing posi
10
tion; and means to rock the shaft and the re
straining members to release the plungers to the
action of the resilient means, whereby the platen
is withdrawn from printing position.
7 . In a machine of the class described, the com
element associated with the hammer to normally
prevent rebound thereof; a member connected
with the element; means on the hammer to move
the element to ineffective position; retaining
means engaged by the member when the element 15
is in ineffective position to retain the element in
ineffective position during the entire printing
operation of the hammer, the hammer adapted,
upon the termination of said printing operation,
to disengage the member from the retaining ,
means; and means to move the element into ef
bination with a printing hammer; and means to
cause the hammer to deliver a printing blow; of
means to prevent rebound of the hammer against
fective position to obstruct rebounding printing
the printing face, including a hammer-arresting
member normally in arresting position; a latch
11. In a machine of the class described, in com
bination with a printing hammer, means to re
ing member associated therewith for relative
movement in one line only to latch the member
out of arresting position; and means on the
printing hammer cooperable with the hammer
arresting member and the latch, whereby the
member is moved out of and into arresting posi
tion and the latch is moved into and out of latch
ing position.
35
tive means rendered. effective upon withdrawal of
the member to move the blocking means to ef
fective position; and means to operate the mem
ber to release the ‘blocking means to move to e1’
fective position under in?uence of the moving
means, said operating means also adapted to re
turn the blocking means to ineffective position.
10. In a machine of the class described, the
combination with a printing hammer and means}
to impart a printing blow to the hammer, of an 10
8. In a machine of the class described, the
combination with a printing hammer and means
to actuate the hammer, of means to block the
hammer, movable from a normally ineffective
position into an effective position; normally inef
40 fective means to move the blocking means to
said effective position; means to render the mov
ing means effective; and means cooperating with
the blocking means to release said blocking
means to move to effective position under the in
45 ?uence of the moving means, and to thereafter
return the blocking means to ineffective position.
9. In a machine of the class described, the
combination with a printing hammer and means
to actuate the hammer, of means to block the
50 hammer against actuation, movable from a nor
mally ineifective position into an effective posi
tion; a member to normally retain the blocking
means in ineffective position; a normally ineffec
movement of the hammer when it is released by
the hammer.
tract the hammer, and a spring to operate the
hammer to effect a printing operation, of a piv
oted arm provided with a shoulder normally in
the path of the hammer to prevent rebound of 1
the hammer after a printing operation; a slide
connected with the arm to pivot with the arm
and to move relatively thereto; a stop; a cam on
the arm coacting with the hammer as the ham
mer is retracted to- withdraw the shoulder from
the path of the hammer and to move the slide
relatively to the stop; a shoulder on the slide co
acting with the hammer whereby the slide is
moved by the hammer into a position to engage
the stop wherein the arm is held out of the path
of the hammer as the hammer makes its printing 40
operation; an abutment on the slide in the path
of the hammer whereby the hammer moves the
slide to disengage the slide from the stop as the
hammer makes its printing operation; and a re
storing spring to restore the arm and slide into
their initial positions when the slide is disen
gaged from the stop to position the shoulder on
the arm into the path of the hammer to arrest
the hammer as it rebounds from its operating
spring after a printing operation.
1
WILLIAM H. ROBERTSON.
60
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