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Патент USA US2108217

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Feb. 15, 193s.
L, C. S'TRINGER
2,108,217
TUBE CUTTÍNG DEVICE
Filed May 5, 1957
3 Sheets-Sheet l
Á?iorneys i
Feb» 15, 1938.
1_. ci STRINGER
2,108,217
TUBE CUTTING DEVICE
Filed May 5, 1937
5 sheets-sheet 2
Áí?orneys
Feb. -15, 1938.
L. C. STRINGER
2,108,217
TUBE CUTTING DEVICE
` Filed May 5, 1957
3 Sheets-Sheet 3
Inventor
.
.4 Hornet/.s
Patented Feb. 15, 1938
UNITE;
2,108,217
STTE-S PNT GFFECE
2,108,217
TUBE CUTTING DEVICE
Louis C. Stringer, Chicago, Ill., assignor to Elec
tronics Supply Corp., a corporation of Dela
Application May 5, i937, Serial No. 140,957
10 Claims.
The present invention relates to what is be
lieved to be a structurally new and improved
device for scoring glass tubes in general, the
speciñc concept as herein illustrated and par
5 ticularly described having to do with an ingen
ious method and means to facilitate accurate
and reliable severance of incandescent bulb por
tions.
.
Looking toward the promotion of a better
10 understanding of the nature and type of this
novel bench-style manually controlled machine,
it seems to be in keeping with good vpolicy to
direct attention to the specific line of endeavor
in which it is particularly adapted for expedient>
_15 use, To this end it is to be pointed out that
certain methods of reclaiming electric lamps and
bulbs have been brought into vogue to renovate,
repair, and adequately recondition so-called
burnt-out lamps.
Persons skilled in the art to which the inven
20
tio-n relates are familiar with the fact that when
the filament of an incandescent lamp is broken
or otherwise impaired, or the effectiveness of gas
2
is destroyed, the lamp is useless unless the iila
ment is properly reconditioned and replaced, this
calling for a complete rebuilding of said lamp.
I have discovered the need for the perfection
of a complete and systematic method of rejuve
nating and reclaiming incandescent bulbs, and
inasmuch as one of the procedural steps involved
therein necessitates severance of the neck from
the bulbous shell to free the filament-equipped
mounting, a machine or tool adequate to accom
plish this result properly is in demand.
Owing
35 to the fragile nature of incandescent bulbs or
envelopes, it has been found that the device
needed for the purpose intended must be of a
manually regulated and hand controlled type, and
thus, the purpose of the present invention is to
40 perfect this phase of the general reclamation
method through the instrumentality of a struc
ture aptly designed to do the job well.
The procedural aspects and accompanying fea
tures and advantages of the invention will be
45 come more readily evident from the succeeding
detailed description and the accompanying illus
trative drawings disclosing the preferred- em
bodiment of the invention.
(Cl. 33-21)
Figure 2 is a top plan View of the arrangement
depicted in Figure l.
Figure 3 is an enlarged fragmentary view, part
ly in section, and partly in elevation, said View
being on the plane of the line 3--3 of Figure 2. 5
Figure 4 is a detail section on the line á-li of
Figure 3.
Figure 5 is what may be called a front end
elevation of the oscillatory cutter head with the
cover plate removed.
10
Figure 6 is a horizontal section on the line 6_6
of Figure 5.
Figure 7 is what may be called an end eleva
tion of the adapter abutment.
Figure 8 is a perspective View of one of the
spring pressed cutter or diamond point mounts.
Figure 9 is a cross-section on the line 9-9 of
Figure. 3.
In the drawings, as shown in Figures 1 and 2,
the base or supporting frame i@ comp-rises a
suitable bench-type base plate il having stand
ards or uprights i2 provided at their upper ends
with bearings to accommodate the oscillatory
horizontal shaft or arbor i3. This is longitudi
nally shiftable in the bearings parallel to the
by the set screws M. On the outer end of the
arbor is the adapter abutment or iitting to
accommodate the incandescent bulb i5 being
repaired.
The adapter ñxture is denoted con- ,
veniently by the numeral Hi. It comprises a
detachable cup ll’ having a cushion i8 fitted
therein. The cup is detachably mounted on the
arbor in any suitable fashion, as indicated at I9.
In practice several different sizes of adapter ñx
tures i6 will be utilized to accommodate Varying
types of conventional glass bulbs, or tubes, as
the case may be. Incidentally, it may be men
tioned that the bulb` i5 embodies the conven
tional bulbous body or shell 2u having a neck
2l formed with the customary sealed-in tip car
rying the ñlament-equipped mount (not shown).
During the course of repair, it becomes neces
sary, in accordance with my prescribed method,
to sever the neck 2l from the body
in order
that the mount may be removed for recondi
tioning and repair. This being a precision job, it
is necessary to form the score line 212 at a pre
determined point forming the juncture of the
r,
In the drawings:
neck and shell or body 2li.
Figure l is a side elevational view of the com
factorily accomplished in the present machine
through the instrumentality oi the cutter
plete assemblage in readiness to accommodate
structed in accordance with the principles of the
55 inventive concept.
_
plate H and held in predetermined set positions
"0
the bulb for severance or cutting, this being con
5
This may be satis- 5U
equipped mandrel unit mounted on the arbor I3.
The aforementioned unit comprises a mandrel
proper in the form of a sleeve 23, this being slìd- 55
2,108,217
2
ably and rotatably mounted on the arbor. The
sleeve forms a convenient hand grip and it is
provided at a predetermined point with a re
silient latch 24 having a V-shaped detent 25
releasably engageable with threads 26, whereby
to provide a sort of a rack and pawl locking
connection between the mandrel and arbor. The
use of the annular threads 25 makes'it possible
to readily slide the mandrel to the desired posi
tion on the arbor, lock it, and thereafter freely
oscillate it or ,turn it for the cutting operation.
On the end of the sleeve is a cross-head 21 pro
vided with a pair of spaced parallel supporting
rods 28 carrying the cutter head 29. The pre
ferred type of head comprises a disk or plate 30
having diametrically opposite grooves formed
therein, as seen to advantage in Figure 5.
The
disk is centrally apertured, as at 3l, to admit
the entrance of the neck of the bulb, and in ef
2.0 fect becomes an oscillatory annulus. Mounted in
the grooves are spring pressed blocks or mounts
S2 having the scoring point 33 preferably dia
mond-point. The blocks are pressed simulta
neously inwardly under the action of the spring
33 held in place by retention cleats 34. These
spring pressed cutter elements are shielded and
held in place by a detachable face or cover plate
35, as illustrated in Figures 3 and 6.
This complete cutter head, as a unit, is remov
30 ably supported on the outer ends of the rods 28
by quick removable set screws 3E of the type seen
in Figure 6. Incidentally, to accommodate dif
ferent types of bulbs, different sized cutter heads
must be employed. The cutter heads are stand
35 ardized to ñt on the rods 2d.
Moreover, each
cutter head is the same in construction, and the
only difference is in the accommodation aper
ture at the center to take care of different sized
bulb necks.
I next call attention to the numerals 31 which
40
designate latches for actuating trips for the
spring pressed cutter elements. The outer` ends
of the latches extend through slots 38 in the disk
38 and engage the blocks 32, as seen in Figure 3.
45 These latches are pivotally mounted, as at 39,
on supporting lugs 49, the latches having operat
ing handles d! located on diametrically opposite
sides of the mandrel or sleeve 23.
The handles
4| terminate in spaced relation from the spring
50 pawl 25 so as not to interfere with the action
thereof.
With this arrangement it is obvious that the
position of the cutter head 29 can be regulated
and set with relation to the adapter fixture l5.
55 This determines the position of the score line 22
on the neck of the bulb, as is obvious.
In pre
cision work of this character, a fine adjustment
is required.
.
In practice, the position of the cutter head
60 is set or regulated by the means 25 and 26.
This is accomplished by bodily sliding the man
The methodical phase of the inventive con
cept resides, it is believed, in a method consisting
in holding the bulb in one hand, and fitting it
into a hand rotated cutting tool, whereby upon
holding the bulb stationary and oscillating or
turning'the tool, the neck may be properly scored
and thereafter severed from the body in a pre
scribed and safe manner. The chief novelty,
however, resides, it is believed, in the particular
construction of the machine or device for ac
10
complishing this job.
It is thought that the description taken in con
nection with the drawings will enable a clear
understanding of the invention to be had. There
fore, a more lengthy description is thought un
necessary.
'
'
While the preferred embodiment of the inven
tion has been shown and described, it is to be
understood that minor changes coming within
the ñeld of invention claimed may be resorted to 20
if desired.
I claim:
1. A fragile tube cutting device of the class de
scribed comprising a support, an arbor on said
support, said arbor being provided with an adapt- ‘
er fixture against which one end of a bulb is held,
a mandrel mounted for oscillation and sliding on
said arbor, said mandrel including an annular
cutter head adjustable toward and from said
adapter fixture.
,
2. In a device of the class described, a rela
tively ñxed arbor having a cushioned adapted de
vice to accommodate one end of an incandescent
or equivalent bulb, a rotary cutter-equipped head
adjustable toward and from said fixture and
adapted to surround the neck of the bulb, and a
mandrel on which said head is mounted, said
mandrel in turn being mounted on said arbor.
3. A glass cutting device of the class described
comprising a relatively stationary arbor having 40
an adapted member on one end, a mandrel ro
tatably and slidably mounted on said arbor, co
acting means between the mandrel and arbor to
limit the sliding movement of the mandrel, a
cutter head supported from said mandrel, said 45
cutter head including spring pressed cutter ele
ments, and remote control actuating means for
said cutter elements coacting with the cutter
elements and mounted on said mandrel.
4. In a structure of the class described, an 50
abutment against which one end of a bulb may
be held, a cutter head associated with said abut
ment and adjustable toward and from it, said
cutter head being centrally apertured to em
brace the neck of the bulb, and manually regu
lated diametrically opposed spring pressed scor
ing elements mounted in said head for scoring
the neck.
5. In a device of the class described, a base in
cluding standards, an arbor slidably mounted in
said standards, a detachable abutment Viixture
dre] and its cutter head as a unit on the arbor
on said arbor, said arbor being provided with
l 3. When the machine is set, the bulb 2B is held
in one hand and the neck is inserted through the
retention elements, a sleeve slidably and rotat
ably mounted on said arbor and including a pawl
cooperable with said retention elements, an an
nular cutter head, means supporting said cutter
head on said sleeve, and latches pivotally mount
ed on said sleeve and engageable with cutter
65 cutting aperture in the head, the neck being
brought to bear against the cushioning block I8
in the adapter cup il. This is brought out in
Figure 3. By holding the bulb in the left hand,
for instance, and catching hold of the sleeve 23
with the right hand, an oscillatory twist back
and forth, generally once around, will score the
bulb, after which it can be bodily removed, a1
lowing the neck 2l to be detached to permit ac
cess to be had for withdrawing the mount (not
75 shown).
elements.
6. In a structure of the class described, a
support including a base having standards ris
ing therefrom, a shaft mounted in said stand
ards, said shaft being provided on one end with
a removable cushion-equipped abutment cup, a
sleeve mounted on said shaft, coacting means 75
3
2,108,217
between the sleeve and shaft to permit the sleeve
to rotate and to permit it to be slidably ad
justed and held in a predetermined adjusted
position, and a cutter head iixedly mounted on
said sleeve.
7. A glass tube scoring device of the class de
9. In a structural assemblage of the class de
scribed, a rotary bulb neck embracing and scor
scribed comprising relatively ñxed adapter and
abutment means against which the sealed-ín
ing annulus designed to permit the 4neck of the
bulb to be held, by hand, in operative relation
end of a bulb may be braced and held, and
10 complemental scoring means in alignment with
and being adapted to encircle the Work to cir
cumscribe a breakable score line around the
Work at a predetermined distance from said
abutment.
«
ship with the scoring means, and a relatively
ñxed stop in workable alignment with the axis 10
and adjustable toward and from said first-named
of said annulus to allow one end of the bulb to
means.
be pressed thereagaínst.
8. A scoring device for glass tube severance
of the class described comprising a relatively
15 fixed abutment against Which one end of the
Work is adapted to be held by hand, and a com
plemental oscillatory scoring unit of a hand ro
tated type, said scoring unit being located in
spaced longitudinal alignment with the abutment
Ul
10. A bulb scoring device embodying a scor
ing unit centrally apertured to permit the neck
o-f a bulb to be'inserted and projected through 15
and beyond the aperture, and scoring means car
ried by said unit and cooperable with the aper
ture to surround said neck.
LQUIS C. S'I‘RINQER.
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