U.S. patent number 3,643,083 [Application Number 04/864,776] was granted by the patent office on 1972-02-15 for battery-operated devices.
This patent grant is currently assigned to Optotechnik G.m.b.H., Propper Manufacturing Company, Inc.. Invention is credited to Helmut A. Heine.
United States Patent |
3,643,083 |
Heine |
February 15, 1972 |
BATTERY-OPERATED DEVICES
Abstract
A battery-operated device such as a medical diagnostic unit
requiring batteries for illumination purposes. The device has an
elongated hollow grip which also acts to accommodate batteries in
its interior, and a springy clip is carried by the grip at its
exterior surface to enable the grip to be situated on the wall of a
garment pocket or other enclosure with the grip situated within the
enclosure and with an upper part of the wall thereof extending
between the clip and the exterior surface of the grip. A movable
switch member is guided for movement by the clip and situated in a
position to be engaged by the upper edge of the wall of the
enclosure and displaced thereby to a circuit-opening position
whenever the grip is situated within the enclosure, so that in this
way the circuit will be automatically opened when the device is not
used and carried about in a garment pocket or placed in another
enclosure which will operate in a similar manner to place the
switch automatically in its open position.
Inventors: |
Heine; Helmut A.
(Herrsching/Obb., DT) |
Assignee: |
Propper Manufacturing Company,
Inc. (N/A)
Optotechnik G.m.b.H. (N/A)
|
Family
ID: |
5714805 |
Appl.
No.: |
04/864,776 |
Filed: |
October 8, 1969 |
Foreign Application Priority Data
|
|
|
|
|
Nov 30, 1968 [DT] |
|
|
P 18 11 923.8 |
|
Current U.S.
Class: |
320/135; 362/183;
320/114; 200/60 |
Current CPC
Class: |
A61B
1/00034 (20130101); A61B 1/00032 (20130101); A61B
1/227 (20130101); A61B 3/1208 (20130101) |
Current International
Class: |
A61B
3/12 (20060101); A61B 1/227 (20060101); A61B
1/06 (20060101); F21l 007/00 () |
Field of
Search: |
;240/10.68,1.6R,10.66,1.5F,2I,1.6CH,6.46,6.46R,6.4CL ;320/2,3,20,27
;310/50 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Prince; Louis R.
Assistant Examiner: Yasich; Daniel M.
Claims
What is claimed is:
1. In a device which operates with electric illumination, an
elongated hollow grip which also functions as a battery housing,
said grip having an exterior surface, a springy clip carried by
said grip at said exterior surface thereof for clipping the grip
onto an upper edge region of an enclosure such as a garment pocket
with the grip situated in the latter, said clip having a bottom
free end and a top end fixed to said grip and said clip defining an
elongated gap with said exterior surface of said grip, so that the
enclosure wall can pass between the grip and the bottom free end of
the clip toward the top end of the latter into and along said gap,
and switch means carried by said grip for closing and opening an
electrical circuit, said switch means including a shiftable switch
member bridging said gap and movable between a lower
circuit-closing position and an upper circuit-opening position, and
said clip carrying a guide means which guides said switch member
for movement between said positions with said switch member when in
its lower position situated in alignment with the enclosure wall to
be engaged by an edge of the latter for automatic displacement
upwardly to said circuit-opening position when the grip is situated
within the enclosure with the upper wall portion thereof extending
along said gap between the clip and the exterior surface of the
grip.
2. The combination of claim 1 and wherein said guide means includes
an elongated portion of said clip which is formed with an opening
through which part of said shiftable switch member extends with
edges of said clip which defines said opening thereof engaging and
guiding said shiftable switch member for movement between said
positions thereof.
3. The combination of claim 2 and wherein a detent means coacts
with said shiftable switch member and said clip for releasably
holding said switch member in one or the other of said positions
thereof.
4. The combination of claim 3 and wherein said detent means
includes a part of said shiftable switch member which is formed
with a transverse bore, a spring situated in the latter bore, a
pair of ball members urged apart from each other by said spring,
and one pair of recesses formed in said clip and receiving said
ball members when said switch member is in one of its positions
while said clip is formed with a second pair of recesses receiving
said ball members when said switch member is in the other of said
positions thereof.
5. The combination of claim 1 and wherein said switch means
includes a stationary contact carried by said grip and a movable
contact displaced by said switch member into engagement with said
stationary contact when said switch member is moved to said
switch-closing position thereof while said movable contact assumes
a position displaced from said stationary contact when said switch
member is moved to said circuit-opening position thereof, said grip
having an upper end adapted to be connected to an instrument and a
lower end provided with a removable end wall which may be removed
for inserting batteries into and removing batteries from the
interior of the grip, said grip having an elongated tubular wall of
electrically nonconductive material providing the grip with its
exterior surface and carrying at the region of said lower end a
circular ring of electrically conductive material, said removable
end wall having a conductive portion engaging said ring and
carrying a spring engaging a battery to provide part of an
electrical circuit from the battery through the spring to the ring
carried by said wall of said grip, and an elongated conductor
extending from said ring along said wall of said grip to said
stationary contact of said switch means.
6. The combination of claim 1 and wherein said hollow grip is
adapted to accommodate rechargeable batteries in its interior, said
grip being made up of an elongated tubular wall of electrically
nonconductive material and carrying in an inner upper end region an
electrically conductive plate engaging one pole of a battery as
well as a contact of an electrical instrument mounted on the grip,
said grip having a lower end carrying a removable closure and in
the region of said closure a threaded ring fixed to said grip and
made of an electrically conductive metal, an elongated conductor
extending along said grip in the interior thereof and electrically
connecting said ring to said plate, said closure having an outer
electrically conductive ring threaded onto said ring carried by
said grip, and said closure having a bottom end wall of insulating
material carried by said outer ring thereof, an inner electrically
conductive support situated within said closure and carried by said
outer ring thereof with a layer of insulation situated between said
support and outer ring to prevent said support and outer ring from
being in electrical communication with each other, a spring carried
by said support and engaging a pole of a battery within said grip
to connect the battery electrically to said support, said
electrically nonconductive bottom wall of said closure being formed
with an opening and said support carrying an electrically
conductive portion accessible through said opening, and said switch
means having a stationary contact carried by said grip and a
movable contact displaced by said shiftable switch member into and
out of engagement with said stationary contact, and an elongated
conductor extending along said grip from said stationary contact to
said support of said closure and being electrically connected to
the latter, whereby said closure may be removed and replaced for
removing and inserting batteries into said grip while with
batteries still in said grip a pair of contacts of a recharging
unit can respectively be placed on and engagement with said portion
of said support through said opening of said bottom wall and the
other in engagement with said outer ring of said closure to provide
for a recharging circuit enabling batteries to be recharged while
they remain within said grip.
7. The combination of claim 6 and wherein a charging unit is
provided for recharging the batteries in the said grip, said
charging unit having a guide sleeve for receiving said grip, and
said sleeve being received between the exterior surface of said
grip and said clip and having a top edge which engages said
shiftable switch member to move the latter upwardly to its
circuit-opening position when the grip is mounted on the charging
unit, so that the circuit is automatically opened when recharging
of the batteries takes place.
Description
BACKGROUND OF THE INVENTION
The present invention relates to battery-operated devices.
In particular, the present invention relates to devices such as
medical diagnostic instruments which require illumination from
batteries. Thus, for example, instruments such as otoscopes,
ophthalmoscopes, illuminating devices for examining the human eye,
and the like, are provided with lamps which must be energized to
provide the required illumination.
Such lamps must receive their power either from a cable connected
to the lines through a wall plug or from batteries. When a cable is
used it is necessary to use also a transformer, while when
batteries are used these are included in a chamber of the device
itself.
Wherever it is possible, the use of batteries is preferred because
an electrically conductive cable extending from the instrument is
cumbersome and with the use of batteries any possible risks of
defective operation as with a defective transformer, for example,
are eliminated. Moreover, batteries are preferred because there
often is no wall plug available to receive the cable.
It is known to construct diagnostic instruments of this type in
such a way that the batteries are housed within a hollow enclosure
which at the same time acts as a grip for the instrument. It is
important to provide particularly small and light battery-enclosing
grips for instruments which a physician carries about not only in
his bag but also, for example, in a breast pocket of his jacket
during visits to a hospital, so that such an instrument is at all
times readily available.
While it has been customary in the past to use for such purposes
dry batteries (zinc-carbon batteries and the like), there are now
available small rechargeable batteries, particularly in the form of
nickel-cadmium battery cells. It is therefore desirable to
construct a grip which serves as a battery housing in such a way
that it is also possible to make use of cells of this latter type
with the capability of recharging such cells without taking them
out of the grip, since such operations would represent a highly
significant inconvenience and disadvantage for a physician.
Inasmuch as the light source in diagnostic instruments of this type
may be visible from the exterior and furthermore since the light
provided by such a light source is in many cases not visible or
only visible from a single direction, it frequently happens that
the operator of the instrument forgets to turn the instrument off
after it is used. The result is a useless discharge of the
batteries and an early burning out of the short-lived lamps.
SUMMARY OF THE INVENTION
It is accordingly a primary object of the present invention to
provide a construction which will avoid the above drawbacks.
In particular, it is an object of the invention to provide a grip
which can accommodate batteries in its interior and connected with
a structure which will automatically open the electrical circuit in
the event that the operator forgets to turn the instrument off.
It is also an object of the invention to provide a construction of
the above type which permits the use of either dry batteries or
rechargeable batteries.
It is in particular an object of the present invention to provide a
construction capable of automatically turning the device off when
it is placed in the pocket of a jacket or when it is placed in a
charging unit for recharging the batteries.
According to the invention the grip of the device is hollow so as
to accommodate batteries in its interior. The grip has an exterior
surface carrying a clip by means of which the grip with an
instrument carried thereby may be mounted in a pocket or other
enclosure with a wall of such an enclosure extending between the
clip and the exterior surface of the grip. The electrical circuit
includes a switch means which has a movable switch member movable
between circuit-opening and circuit-closing positions, and the clip
carries a guide means which guides the shiftable switch member for
movement between these positions. The arrangement is such that the
upper edge of the wall of the pocket or other enclosure will engage
the shiftable switch member to displace it from its switch-closing
to its switch-opening position when the grip is situated within the
enclosure with wall thereof situated between the clip and the
exterior surface of the grip, so that in this way an automatic
opening of the circuit will take place even if the operator should
forget to place the switch in its circuit-opening position.
BRIEF DESCRIPTION OF DRAWINGS
The invention is illustrated by way of example in the accompanying
drawings which form part of this application and in which:
FIG. 1 is a fragmentary sectional elevation of one embodiment of a
structure according to the invention;
FIG. 2 is a fragmentary sectional elevation of another embodiment
of a structure according to the invention;
FIG. 3 is a fragmentary partly sectional illustration of detent
structure for releasably maintaining a shiftable switch member in a
selected one of a pair of positions;
FIG. 4 is a fragmentary partly sectional elevation of a further
embodiment of a structure of the invention;
FIG. 5 is a fragmentary sectional elevation on an enlarged scale of
the structure at the lower end region of FIG. 4; and
FIG. 6 is a schematic partly sectional perspective illustration of
a recharging unit for recharging batteries within the grip.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to FIG. 1, the embodiment of the invention which is
illustrated therein is particularly suited to accommodate within
the hollow grip particularly small dry batteries. The grip 1 is
made of a suitable, advantageously light material, which preferably
is plastic. Thus, the grip 1 is of an elongated tubular
construction and has a wall which is not electrically conductive.
In order to connect this grip or battery enclosure with a
diagnostic instrument, the upper end of the tubular grip fixedly
carries a threaded sleeve 7 made of metal. The instrument can be
treated to this sleeve so as to be connected in this way to the
grip 1. Of course, other types of connections can be used instead
of a threaded connection. For example a bayonet connection can be
used.
With this embodiment of the invention the lower end of the hollow
grip 1 is closed, so that the insertion of the batteries into the
hollow grip takes place upon removal of the instrument 9, which may
simply be a hand lamp which can be focused, so that the interior of
the hollow grip 1 becomes accessible through the threaded
connecting ring 7. The lower end wall of the grip supports a spring
3 which urges the batteries 2 upwardly with the top pole of the
upper battery 2 engaging a contact pin 10 which is electrically
connected with the lamp of the instrument. In addition, the spring
3 is in electrical engagement with an elongated conductor 4 in the
form of an electrically conductive strip which extends upwardly
along the inner surface of the hollow grip 1.
The grip carries a switch means which includes a stationary contact
formed by the upper end of the conductor 4. This switch means
includes a movable contact in the form of a springy member 5
capable of being displaced into and out of engagement with the
stationary contact so as to close and open the circuit. The spring
5 will move away from the stationary contact due to the inherent
resiliency of the spring 5. Since the top end of the conductor 4 is
shaped to form the stationary contact, no special stationary
contact or connection between the latter and the conductor 4 is
required.
The switch means includes a shiftable switch member 6 which is
guided for movement in a corresponding groove formed in the
exterior surface of the grip 1. When the shiftable switch member 6
is in its upper end position, displaced toward the instrument 9,
the contact 5 situates itself away from the stationary contact, so
that in its upper end position the switch member 6 is in its
circuit-opening position. When, however, the shiftable switch
member 6 is displaced downwardly away from the instrument 9, this
switch member 6 will cam the movable contact 5 into engagement with
the stationary contact at the top end of the conductor 4, so that
the circuit will be closed. Thus, the lower position of the
shiftable switch member 6 represents the circuit-closing position
thereof.
Inasmuch as battery grips of this type will conveniently be carried
about by a physician, for example, in a garment pocket, such a
battery grip is provided, in accordance with the invention, with a
springy clip 8 capable of releasably holding the grip 1 within the
pocket or other enclosure with the wall of the latter situated
between the springy clip 8 and the exterior surface of the grip 1.
Thus, the clip 8 has a lower free end resiliently urging itself
toward the exterior surface of the grip 1 so as to clamp the grip
releasably in a pocket engaging the wall thereof. The top end of
the clip 8 is fixed directly to the exterior surface of the grip
1.
At the region of its upper end the clip 8 is formed with an
elongated opening acting as a guide means in that the clip 8 has
opposed side edges slidably engaging the shiftable switch member 6
so as to guide the latter for movement between its upper
circuit-opening and lower circuit-closing positions. The shiftable
switch member 6 extends outwardly beyond the front surface of the
clip 8 through a distance sufficient to provide for convenient
manipulation of the switch member 6 in order to turn the device on
and off. At the same time the shiftable switch member 6 does not
extend beyond the clip 8 to such an extent that accidental shifting
of the member 6 will take place, and thus the structure reliably
prevents unintentional turning of the device on and off by
accidental engagement of the switch member 6 with an exterior
projection.
It is clear, therefore, that the shiftable switch member 6 extends
across the gap between the exterior surface of the grip 1 and the
clip 8. Therefore, when the grip 1 is placed in a pocket or other
enclosure, the upper wall portion of the latter will have its upper
edge situated in the region of the shiftable member 6 between the
exterior surface of grip 1 and the clip 8. If it should happen that
the shiftable switch member 6 is in its lower circuit-closing
position, then this upper edge of the wall of the pocket or other
enclosure will engage the switch member 6 and automatically
displace it upwardly to its circuit-opening position during
insertion of the device into the pocket or other enclosure. In this
way there is an assurance that the instrument will reliably be
turned off even in the case where the operator unintentionally
leaves the instrument turned on, this automatic turning off of the
instrument taking place during insertion thereof into a pocket in
the above-described manner. In this way one of the important
advantages of the structure of the invention is achieved.
In order to make certain that the shiftable switch member 6 does
not become displaced between its circuit-opening and
circuit-closing positions without actuation of a certain minimum
actuating force, a detent means is provided for releasably holding
the shiftable switch member 6 in one or the other of its positions.
Thus, as may be seen from FIG. 3, the shiftable switch member 6 is
provided with a transverse bore 25 accommodating at its end regions
a pair of detent ball members 26 which are urged apart from each
other by a spring 27 situated within the bore 25. The elongated
opening of the clip 8 has at its opposed side edges which guide the
switch member 6 detent recesses 28 and 29. Thus, the detent
recesses 28 are situated to receive the detent ball members 26 when
the shiftable switch member 6 is in its upper circuit-opening
position, while the pair of detent recesses 29 are situated to
receive the ball members 26 when the shiftable switch member 6 is
in its lower circuit-closing position. With the position of the
part shown in FIG. 3 the detent balls 26 are in the upper recesses
28 thus releasably holding the member 6 in its circuit-opening
position.
FIG. 2 of the drawings illustrates another embodiment of the
invention. According to this embodiment the elongated tubular grip
11 is designed to accommodate somewhat larger batteries 12 and has
at its bottom end a removable cap which is removably connected with
the tubular wall of the grip 11. After this cap is removed it is
possible to remove and replace batteries through the bottom end of
the hollow grip. In this way it is possible to place in the hollow
grip of this embodiment batteries whose diameters are greater than
the diameter of the connecting element by which the instrument on
top of the grip is releasably connected thereto. In the illustrated
example the instrument is, as indicated at the upper part of FIG.
2, an ophthalmoscope 19.
The elongated tubular hollow grip 11 is advantageously made of
plastic so that the economically favorable manufacturing methods
may be used to construct the device and in order to give the device
the smallest possible weight. It is required to provide a
connection between the lower pole of the lower battery and the
switch means. For this purpose the closure cap can either be
manufactured entirely of metal or, as indicated in FIG. 2, the cap
may have a bottom wall 21 made of an insulated material and a
metallic threaded ring 22 which is connected with an extends
upwardly from the wall 21. This ring 22 has an electrically
conductive connection with the contact spring 13 which in addition
serves to urge the batteries upwardly against the upper contact 20
of the diagnostic instrument. The lower end of the grip 11 fixedly
carries a metal ring 23 onto which the ring 22 is threaded. This
ring 23 is in contact with the elongated conductor 14 which forms a
contact strip extending upwardly along the interior of the grip and
terminating at its top end in the stationary contact 24 with which
the movable contact 15 coacts in the manner described above. Thus,
with this embodiment also the hollow tubular grip 11 carries at its
upper end region the springy clip 18 which has the guide means for
the shiftable switch member 16 which coacts with the movable
contact 15 to displace the latter into engagement with the
stationary contact 24 when the member 16 is shifted downwardly
while the member 15 will displace itself away from the contact 24
when the member 16 is displaced upwardly, as pointed out above in
connection with FIG. 1. Thus, the embodiment of FIG. 2 will achieve
the same results as that of FIG. 1 with respect to the automatic
turning off of the instrument when it is placed in the pocket or
other enclosure in the manner described above.
FIGS. 4 and 5 of the drawings illustrate an embodiment of the
invention which may optionally be used with rechargeable batteries,
particularly gastight nickel-cadmium cells, while it desired it is
also possible to use dry batteries. It is required to provide the
possibility for charging the cells without removing them from the
hollow tubular grip. In this embodiment also there is a lower
closure 50 removably connected with the bottom end of the hollow
tubular grip so as to enable insertion and removal of batteries
through the bottom end of the grip to be carried out either
initially when new batteries are placed in or whenever batteries
are to be changed.
Inasmuch as the charging of the batteries must be capable of taking
place while the latter are in the hollow grip, without removing the
instrument 39 from the top of the grip, it is required to provide
suitable contacts by means of which the exterior source for the
charging current may be connected with the batteries. In one
embodiment of this inventive concept this result is achieved by
placing one pole of the charging voltage through a corresponding
opening 46 in the lower electrically nonconductive wall 41 of the
closure in engagement with the contact portion 47 of a support
which carries the spring 33. The second pole for the charging
voltage is placed in engagement with the outer metal ring 42 of the
closure 50. This ring 42 is connected with the insulating wall 41
in any suitable way such as by gluing or the like.
In order to provide, when the closure 50 is in its closing
position, an electrical connection between the outer ring 42 and
the upper battery pole, a springy contact plate 45 is situated at
the upper end region of the hollow grip 31 engaging the upper pole
of the upper battery and also engaged by the connecting contact of
the unit 39 which consumes the energy. This contact plate 45 is
electrically connected through an elongated conductor 44, in the
form of a contact strip, with the metallic, electrically conductive
ring 43 which is fixed to the electrically nonconductive wall of
the grip 31 and onto which the outer ring 42 of the closure 50 is
threaded. Thus, as is particularly apparent from the lower left
region of FIG. 5, the conductor 44 is electrically connected with
the ring 43 onto which the ring 42 is threaded so that in this way
the ring 42 and the contact plate 45 are electrically connected
with each other.
The electrically conductive portion 47 of the support for the
spring 33 provides the electrical connection to the other pole of
the battery. Thus the spring 33 provides the electrical connection
to the opposite pole of the lower battery while at the same time
pressing the top pole of the upper battery against the contact
plate 45. Moreover through the spring 33 the electrical connection
is made with the spring supporting structure which is electrically
conductive and which is insulated from the ring 42 by a layer of
insulation 48. Thus, the charging voltage can now be applied
between the contact portion 47 and the ring 42 of the grip.
The ring 43 which is fixed to the grip 31 and the outer ring 42 of
the closure can be interconnected by threads so that the closure
can be threaded onto or off from the grip. However, other types of
connections such as bayonet connections may be provided, if
desired.
The lower support member of the closure, which is insulated from
the ring 42 by the layer 48, and which carries the spring 33 and
has the electrically conductive portion 47 which is accessible
through the opening 46, is in electrical engagement with an inner
ring which is fixed to the hollow grip 31 and which is in
electrically conductive engagement with an elongated conductor 34
in the form of an elongated strip extending upwardly along the
interior of the hollow grip 31 and situated opposite the conductor
44. This conductor 34 terminates at its top end in the stationary
contact of the switch means, and this stationary contact coacts
with the movable springy contact 35. The upper portion of FIG. 4
shows the internally threaded ring 37 which is fixed to the grip
and serves to connect the diagnostic instrument 39 to the grip. The
springy contact 35 of the switch means is displaced into and out of
engagement with the stationary contact of the switch means formed
by the top end of the conductor 34 by vertical displacement of the
shiftable switch member 36 guided by the guide means at the upper
end region of the spring clip 38 which is connected at its top end
to the exterior surface of the grip 31. Thus, this embodiment will
produce the results set forth above with respect to automatic
opening of the circuit whenever the device is situated in a pocket
or other enclosure where a wall of the enclosure extends between
the clip 38 and the exterior surface of the grip 31 to displace the
switch member 36 upwardly to its circuit-opening position in the
automatic manner referred to above.
In order to charge the batteries, a separate charging unit is
provided, as indicated in FIG. 6. This charging unit has, in a
known way, a transformer 52 which steps the line voltage down to
the required lower voltage of only a few volts, and the unit also
includes a rectifier 53 in order to achieve the required direct
voltage for the charging of the batteries Furthermore, it is
possible to situate in the charging circuit protective resistors
which limit the charging current to an acceptable maximum
value.
The charging unit is provided with an enclosure for receiving the
battery grip which contains the batteries which are to be charged.
This enclosure is in the form of a tubular sleeve 57 into which the
hollow grip 31 is placed in the manner illustrated in FIG. 6. Thus,
the hollow tubular enclosure 57 receives the grip, and this
enclosure or guide sleeve 57 may be made of metal or insulating
material. Coaxially arranged beneath the enclosure 57 is a sleeve
58 of insulating material. This sleeve 58 accommodates the required
contact devices to bring about the electrical connection between
the grip and the charging structure. In the construction shown in
FIG. 6 the contact structure includes a ball member 55 which is
pressed by a spring 56 against the outer metal ring 42 of the
closure 50 of the grip. In addition the structure includes a metal
contact pin 54 supported in a yieldable springy manner for movement
through the opening 46 in the closure wall 41 into engagement with
the conductive element 47. These contacts are brought about
automatically upon introduction of the grip into the enclosure
57.
Of course, before the battery grip is inserted into the charging
unit the device should be turned off by movement of the shiftable
switch member 36 to its upper circuit-opening position. In this way
the instrument 39 will not be operating during charging and at the
same time the batteries will not be discharging simultaneously with
the charging thereof, so that, in other words, energy is not taken
from the batteries by the consumer 39 during charging of the
batteries. However, inasmuch as the operator may frequently forget
to turn the device off, the wall of the enclosure 57 has dimensions
enabling this wall to become situated between the springy clip 38
and the exterior surface of the grip 31 in such a way that when the
device is inserted into the charging unit the upper edge region of
the enclosure 57 will engage the shiftable switch member 36 and
automatically displace the latter to its upper circuit-opening
position so that the circuit is automatically opened. In this way
even if the operator should unintentionally forget to turn the
device off, it will automatically be turned off and will not
undesirably discharge as long as the device is mounted in the
charging unit.
* * * * *