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Патент USA US2407333

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Sept. 10-, 1946.
Filed March 1, 1945
Patented Sept. 10, 1946
HarryL. Van Velzer, StateGollege, Pa.
Application Marchrl, 1945, Serial‘No. 580,453‘ '
5 Claims.
(655mm under the act of Mai-c113, 1883', as
amended April 30, 19281370 0. G. 75"?)
The invention described herein may be manu
factured and used by or for the Government for,
governmental purposes, without the payment to
me of any royalty thereon.
- cup. 4 of approximately the same length as the
body-‘la, of ‘the ‘plug. It is”of a diameter to ?t
over 2a "andlint'eriorly threaded with threads
complementary to those on 2a. It is adapted
to receive and cooperate with 2a. Radially di
rectedistuds, pins, set screws or. the like 5, ex-‘
tend. from its side walls playing freely in the
The invention to be hereinafter described re
lates to bulb grippingiand holding devices.
There are many devices provided with resilient
longitudinal slot 6 of.‘ la.
members for receiving therebetween and yield
As‘ 2 is rotated it will, of course, feed 4 longi
ingly holding bulbs, such as electric light bulbs,
tudinally of‘ Iain one direction or the other ac
and various other objects of a somewhat similar 10 cording to the direction of ‘rotation, the extent
frangible nature. An objection to most of them
of such feed or travel corresponding to the num
is that they are not adjustable to objects of vary
ber of rotations of _2. The longitudinal feed of
ing sizes to any considerable extent. A- further
cup, [affects the operations of the gripping and
objection to many is thatthough they may be
elements or features, as will be more
spread to receive objects ofvincreasing size, they 15' holding
can not be contracted about such larger objects In‘ the opposite end of la are mounted the in
or, in fact, about any object received therein.
ner ends of a plurality of ?exible gripping orjaw
The‘present invention is constructed and de
members or elements ‘I. They vmay be secured.
signed‘ to avoid the above and other objections
therein to travel'therewith by any suitableand
and provide a simple, e?i‘cient, compact and dur
acceptable means.‘ In the instance. shown,v it is
able bulb'gripping and holding device which may
‘a friction ?t. Preferably, these gripping mem
be produced at low cost from readily obtainable
bers are leather in the form and shape known
and used ‘as V-belt. Their ?exibility, preferably,
In order to more‘clearly disclose the construe.
tion, operation and use-of thee-invention, refer‘
ence should beha-dl to the accompanying draw-r
ing forming ‘part of the present application.
Throughout the several ?gures of the drawing
like reference‘ characters designate the same
parts in the different views.
Fig.1 is a central longitudinal cross section,
showing only the two operative gripping parts
that would appear in elevation;
Fig; 2 is a top plan view of Fig. 1, omitting the
flexible gripping members and'the spreader; and
Fig. 3 is a right hand end elevation of the
In Fig. 1 the invention is shown in its full oper
ative grippingv and holding position.
Referring to the drawing in detail, I and la
indicate, respectively, outer and inner tubular
members of a telescopic handle.
frequent and regular intervals throughout their
lengths. In the construction shown, four such
members are used though it will be well under
stood that the invention is not in any degree lim
30 ited to four. Two, only, of the four arevshown.
A view at right angles to Fig. 1 would show the
In the drawing:
25 is‘increased by lateral kerfs or V-notches 8 at
The outer or
free endof la is closed by a tubular plug 2 hav
ing a ?anged and knurled‘head 3 and an exteri
orly-thre‘aded body an of reduced diameter‘ and
appreciable length. Plug 2 is swivelled into the
outer end ‘of la by‘one or more‘ small set screws,
pins, or the like extending through the wall of la
and into an annular groove or channel in 2.
This, of course, locks the plug in the free end
of la, and prevents its removal or any longitudi
nal movement. On the other hand, it permits
unlimited rotation of 2 within Ia.
other two but‘ would add nothing to a clear un
derstanding of the invention. Through each of
these members is threaded a strong, small di
ameter wire 9 such as piano wire, for instance. '
One end is anchored to the outer end of the re
spective member ‘I. The opposite end is extend
ed‘ through the interior of the handle and an
chored to the inner end or bottom of cup 4.
By stressing wires 9 jaws 1 will contract upon
themselves and toward each other in generally
circular paths or. directions along the lines of’
least resistance-—i. e. along the notched edges.
However, without devices to guide in formation
45 of the curves they willbe relatively small in di
ameter, ?at and irregular and the curve of one
member‘ may I not, necessarily, correspond with
that of‘, any other. To avoid these di?iculties a
‘spreader has been devised comprising a rod or
piston l0 and spider or head ll. Each arm or
branch [2 of the spider terminates in a saddle
l3 adapted to straddle and receive the V edge of
the respective member ‘I. '
Rod 9 extends longitudinally through outer
tube l and the telescoped part of inner tube la
Mounted within la isa longitudinally movable
and between the assembled ?exible members ‘I
within those members. The extreme inner end
It is thought that the construction, operation
and use of the invention will be clear from the
of rod III is yieldingly connected to a radially ex
preceding detailed description.
tending web I4 of a collar or ring I5 carried by
one end of the member I.
That part of web I4
connected to I5 extends through and is freely
However, the ring I5 being
?xed to I travels with it and is stationary with
. slidable in the slot 6.
relation thereto. This member I4, on the other
hand, is provided with holes or perforations for
the free passage of the wires 9 during any tele
scoping movement of tubes I and la. A tension
spring I6 connects the web It! with the adjacent
end of II] urging I0 toward I4 in a retracting ac
Many changes may be made in the construc
tion, arrangement and disposition of the various
parts of the invention within the scope of the
appended claims Without. departing from the ?eld
of the invention and it is meant to include all
,such within this application wherein only one
g preferred form has been illustrated, purely by
way of example and with no thought or intent
of, in any degree, limiting the invention thereby.
Having thus ‘described my invention what I
claim and desire to. protect by Letters Patent is:
1. ‘In combination in a bulb holding device,
a tubular handle, ?exible holding members
tion. That, in turn draws the spider II against
the members 1 at points only slightly beyond the
outer or free end of I, thereby spreading them
and maintaining them, at that point, uniformly
separated or distended, the spider'and tube end
cooperating in this action.
With the parts in the position of Fig.- 1, the
jaws are gripping and are securely held about
mounted therein and extending therebeyond to
7 provide gripping jaws, means extending through
said flexible members and therebeyond within
20 said handle, means stressing said last named
means and means movable within said handle
the bulb or other object which would be inclosed
by" them. To loosen that grip, the head 3 is
turned to‘ travel the, member 2, 2a toward the 25
jaw end. This removes strain from wires 9 and
permits the ?exible members 7 to slack, extend
or loosen, reducing the gripping action. It also
reduces the binding friction between ‘I and the
end‘ of I, as will be clear. Then the ring I'I, slid
ably mounted on I and provided with radial web
between said ?exible holding members and yield
ably engaging and spreading said ?exible mem
bers adjacent and exterior to said handle.
2. In combination in a bulb holding device,
a tubular handle, ?exible holding members
mounted therein and extending therebeyond to
provide gripping jaws, means extending through
said ?exible members and therebeyond within
said handle, means stressing said last named
means, means movable within said handle be
I8 extending through aligned slots 6 and I9 in
tween said ?exible holding members and engag
la and I respectively, and connected to I6, is
ing and spreading said ?exible members ad
moved toward the jaw end, against the tension
of spring I6. This carries the spreader out of 35 jacent and exterior to said handle, and means
for releasing said engaging and holding means.
engagement with members ‘I, allowing them to
slacken and collapse.
‘With the jaws ‘I secured in Ia against longi
tudinal movement therein, the spreader 9—I3
ill‘ the position of Fig. l, frictionally binding and
looking ‘I against the end of I and de?ecting
them to open or spread position, and the wires 9
under the desired tension, the curved jaws
formed by the members ‘I become substantially
Rigidity, however, is not imparted until the
necessary tension is exerted.
That tension is
imparted by drawing the cup 4 toward the head
3 or plug 2, as previously stated, The requisite
travel of 4 along 2a of 2 to create the desired ten
sion, may be altered by various circumstances
and conditions, including the degree, vamount or
3. A bulb holding device comprising a hollow
handle member, ?exible gripping members se
cured at one end within the handle and extending
therefrom, ?exible tension means positioned
within the gripping members and. secured to the
outer ends of the gripping members and adapted
upon tensioning to vary the conformation thereof,
and means positioned on the handle and con
nected to- said tension means for varying the
tension on the tension means, whereby the pres
sure exerted on a bulb by the gripping members
may be varied.
4. The structure as claimed in claim 3, includ
ing a spreader positioned between the gripping
members and yieldingly adjustable with respect
thereto to adapt the gripping members to engage
bulbs of different sizes.
extent of spread or curvature of the members ‘I
5. A bulb holding device comprising a hollow
in forming the jaws for the respective use. The
handle member, a plurality of ?exible gripping
threaded connection amply provides for estab
elements having their inner ends secured within
lishing the respective desired tension under any
the handle member and extending therefrom, ten
and all circumstances for all uses or applications
sioning elements respectively positioned within
for which the device hasbeen devised.
the gripping elements and connected thereto at
As will be well understood, the members I and
la‘ are each provided with diametrically placed 60 the outer ends of the gripping elements, adjust
ing means on the handle connected to the ten
slots 6 and I9 for free travel of the webs I4 and
sioning elements for varying the loading thereof
I8. .While pairs or" such slots have been shown
to thereby vary the conformation of the gripping
and are preferable, more may be used.
elements, a sleeve slidably mounted on the handle
Rod I 0 may be secured to web I 8 in any manner
member and engaging the exterior of the gripping
desired as by soldering, welding, riveting etc. In
elements, a spreader movable longitudinally with
assembled relation it has an easy sliding position
respect to the handle and engaging the inner sur
centrally within the handle and between the in
faces of the gripping elements and a yielding
ner edges of the members ‘I, a very gradual and
connection between the spreader and said sleeve
slightly increasing radial space resulting between
‘I and II), longitudinally of Iii in the direction of 70 member.
the spider II from the end of Ia to the end of I,
due to the slightly greater diameter of I.
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