RELEASE MECHANISMJOHN W. DAVIS
Patented Jan 6, 1987
SUMMARY OF THE INVENTION
The present invention is directed to a release mechanism for
releasing an object when the temperature reaches a predetermined
release temperature. The release mechanism may be incorporated into a
novelty "brass monkey" to "emasculate" the monkey when exposed to a
predetermined temperature.
The release mechanism of the invention comprises means defining a
passageway for movement of an object to be released and temperature
responsive means at least partially obstructing the passageway to
prevent movement of the object along the passageway before the
temperature of the temperature responsive means reaches a
predetermined release temperature. The temperature responsive means
moves to open the passageway to allow movement of the object along the
passageway when the temperature of the temperature responsive means
reaches the predetermined release temperature. In a disclosed,
preferred form of the invention the temperature responsive means is a
bimetallic strip which is fixedly supported at one end with the
opposite free end of the bimetallic strip being positioned for
movement toward and away from the passageway for at least partially
obstructing the passageway to prevent movement of the object along the
passageway before the temperature of the bimetallic strip reaches the
predetermined release temperature. The free end of the bimetallic
strip moves away from the passageway to open the passageway to allow
movement of the object along the passageway when the temperature of
the bimetallic strip reaches the predetermined release
temperature. The free end of the bimetallic strip is preferably
L-shaped for contacting the object to prevent movement thereof along
the passageway. A non-metallic tip formed of plastic, for example, can
be provided at the free end of the bimetallic strip for contacting the
object. The plastic tip can be press-fitted onto the bimetallic
strip.
The passageway for movement of an object to be released is inclined
with respect to the horizontal in the disclosed embodiment of the
invention so that release of the object from the mechanism upon
reaching the predetermined release temperature is facilitated by the
force of gravity. If the object to be released is at least round in
cross section, a round ball is employed in the illustrated embodiment,
it is able to roll under the force of gravity down the inclined
passageway past the temperature responsive means when the temperature
of the temperature responsive means reaches the predetermined release
temperature.
The novelty "brass monkey" incorporating the release mechanism of
the invention includes a base which is provided beneath the release
mechanism for receiving the object released by the release
mechanism. The base is designed to produce an audible sound when
struck by the balls released from the release mechanism. The base can
also be provided with an electrical switch means which is actuated by
the ball received by the base. The electrical switch means can be used
to activate other devices.
According to a further feature of the invention means are provided
for adjusting the predetermined release temperature of the release
mechanism. In a preferred form of the invention, this means for
adjusting comprises a support for the object to be released and means
for adjusting the location of the support, and hence the object
thereon, relative to the temperature responsive means.
These and other objects, features, and advantages of the present
invention will become more apparent from the following description
when taken in connection with the accompanying drawings which show,
for purposes of illustration only, one embodiment in accordance with
the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view
of a "brass monkey" of the invention shown partially in cross-section
through the body of the monkey and illustrating the release mechanism
of the invention and the accompanying base and showing two balls to be
released from the body when the temperature of a bimetallic strip of
the mechanism reaches a predetermined release temperature;
FIG. 2 is a top view
of a portion of the release mechanism of the invention of FIG. 1 taken
along the line II-II and depicting the bimetallic strip in relation to
the two balls to be released from the body of the release mechanism;
and
FIG. 3 is an enlarged
cross sectional view of a portion of the release mechanism of the
invention and illustrating two additional features of the of the
invention not shown in FIG. 1 including means for adjusting the
predetermined release temperature for releasing the balls from the
mechanism and an L-shaped plastic tip press-fitted onto the free end
of the bimetallic strip.
DESCRIPTION OF THE DISCLOSED
EMBODIMENT
Referring now to the drawings, a release mechanism 1 according to
the invention is shown incorporated into a novelty "brass monkey" for
releasing balls 2 and 3 from a body 4 of the "brass monkey" at a
predetermined release temperature through an opening or passageway 5
in the body.
More specifically, the body 4 comprises a support surface 6 and
side walls 7 and 8 which define a passageway for movement of the balls
2 and 3 to be released. A temperature responsive means in the form of
a bimetallic strip 9 at least partially obstructs the passageway to
prevent movement of the object along the passageway 5 before the
temperature of the bimetallic strip reaches a predetermined release
temperature. The bimetallic strip is fixedly supported at one end in a
slot 10 in the body 4 by crimping the portions of the body on either
side of the slot 10 against the bimetallic strip or otherwise
fastening the strip therein as by soldering, for example. The opposite
free end of the bimetallic strip is positioned for movement toward and
away from the passageway 5 for at least partially obstructing the
passageway to prevent movement of the balls 2 and 3 along the
passageway and past the strip 9 before temperature of the bimetallic
strip reaches the predetermined release temperature. The bimetallic
element 9 is made by welding together two strips of metal having
different coefficients of expansion. For example, the two strips of
metal may be invar (iron-nickel alloy) and brass. A change in
temperature causes the bimetallic element or composite strip to bend
an amount proportional to the temperature. Thus, when the temperature
drops to a predetermined release temperature, the free end of the
bimetallic strip 9 moves upwardly to the position shown in dashed
lines in FIGS. 1 and 3 thereby releasing the balls 2 and 3 for
movement through the opening or passageway 5 of the body 4.
Preferably, the free end of the bimetallic strip 9 is L-shaped so
that the free end of the strip contacts the adjacent ball to prevent
movement thereof along the passageway before the temperature of the
bimetallic strip reaches the predetermined release temperature. As
shown in FIG. 3 of the drawings, the L-shaped tip 11 of the bimetallic
strip 9 may be formed of plastic with the tip 11 being press-fitted
onto the bimetallic strip.
The support surface 6 of the body 4 which defines the passageway 5
for movement of the balls to be released is preferably inclined with
respect to the horizontal. This inclination is 5o to 7o in the
illustrated embodiment. With this arrangement, the force of gravity
causes the balls to roll down the support surface 6 and out the
opening in the bottom of the body 4 when the bimetallic strip moves
away from the passageway at the predetermined release temperature.
A means 12 can be provided in the release mechanism for adjusting
the predetermined release temperature as shown in FIG. 3 of the
drawings. The means 12 comprises a support 6' for the balls 2 and 3
and means in the form of adjusting screws 13 and 14 for adjusting the
location of the support 6' relative to the bimetallic
strip. Adjustment of the screws 13 and 14 changes the spacing between
the support 6' and the free end of the bimetallic strip 9. Since the
amount of bending of the bimetallic strip is proportional to the
temperature, changing the relative spacing between the support 6' and
the free end of the bimetallic strip necessarily changes the release
temperature at which the balls 2 and 3 can roll unobstructed past the
free end of the bimetallic strip.
A base 15 of the novelty "brass monkey" is provided beneath the
release mechanism to receive the balls released by the mechanism. Both
the body 4 of the "brass monkey" and the base 15 are preferably formed
of metal with the base 15 having a hollow form so as to produce an
audible sound when struck by the balls released from the body 4. The
balls 2 and 3 successively drop from the body 4 onto an inclined top
step 16 of the base from where they progressively roll and drop
through additional steps 17, 18, 19 and 20 formed on the base as shown
in FIG. 1. An electrical switch 21 can be provided in the base, for
example adjacent the bottom step 20 for actuation by the balls. In
particular, the switch 21 is provided with a plunger located in a
position where it is contacted and depressed by the ball 2 when the
ball is received in the lower step 20 of the base. The electrical
switch 21 can, in turn, be used to activate other devices such as a
bell tone or chimes, for example. Once the balls have been dropped
from the body 4 by the release mechanism, and the temperature has
increased above the predetermined release temperature, the balls can
be returned to the body 4 by inserting them through the bottom opening
5 in the body in which case the bimetallic strip 9 is pushed upwardly
momentarily at its free end for insertion of the balls onto the
support surface of the body, or the balls may be inserted in another
opening, not shown, provided in the side of the body adjacent the
support surface 6.
While I have shown and described only one embodiment in accordance
with the present invention, it is understood that the same is not
limited thereto, but is susceptible to numerous changes and
modifications as known to those skilled in the art. For example, the
release mechanism and base of the invention are not limited to use in
a novelty "brass monkey" but could be used in other applications for
releasing balls and/or a variety of other objects. For example,
lightweight cylinders could be permitted to roll down the inclined
support surface upon reaching a predetermined release
temperature. Further, the bimetallic element in the release mechanism
could be in a form other than a strip and also could be oriented so as
to release an object with an increase in temperature to a
predetermined release temperature instead of with a decrease in
temperature to a predetermined release temperature as in the disclosed
embodiment of the invention. Therefore, I do not wish to be limited to
the details shown and described herein, but intend to cover all such
changes and modifications as are encompassed by the scope of the
appended claims.
I claim:
1. A release mechanism comprising means defining a passageway for
movement of an object to be released and temperature responsive means
at least partially obstructing said passageway to prevent movement of
said object along said passageway past said temperature responsive
means before the temperature of said temperature responsive means
reaches a predetermined release temperature and said temperature
responsive means moving to open said passageway to allow movement of
said object along said passageway past said temperature responsive
means when the temperature of said temperature responsive means
reaches said predetermined release temperature, wherein said
temperature responsive means is a bimetallic element, means being
provided for fixedly supporting said bimetallic element at one portion
thereof with a second portion of said bimetallic element being
positioned for movement toward and away from said passageway for at
least partially obstructing said passageway to prevent movement of
said object along said passageway before the temperature of said
bimetallic-element reaches the predetermined release temperature and
for moving away from said passageway to open said passageway to allow
movement of said object along said passageway when the temperature of
said bimetallic element reaches said predetermined release
temperature.
2. A release mechanism according to claim 1, wherein said second
portion of said bimetallic element is an L-shaped free end of the
bimetallic element.
3. A release mechanism according to claim 2, wherein the L-shaped
free end of said bimetallic element includes a non-metallic tip for
contacting said object to prevent movement thereof along said
passageway.
4. A release mechanism according to claim 3, wherein said
non-metallic tip is formed of plastic, said tip being press-fitted to
said bimetallic element.
5. A release mechanism according to claim 1, wherein said
passageway is inclined with respect to the horizontal.
6. A release mechanism comprising means defining a passageway for
movement of an object to be released and temperature responsive means
at least partially obstructing said passageway to prevent movement of
said object along said passageway past said temperature responsive
means before the temperature of said temperature responsive means
reaches a predetermined release temperature and said temperature
responsive means moving to open said passageway to allow movement of
said object along said passageway past said temperature responsive
means when the temperature of said temperature responsive means
reaches said predetermined release temperature, wherein said
passageway is inclined with respect to the horizontal and said object
is at least round in cross section so as to be able to roll under the
force of gravity down the inclined passageway when the temperature of
said temperature responsive means reaches said predetermined release
temperature.
7. A release mechanism according to claim 6, wherein said object is
a round ball.
8. A release mechanism comprising means defining a passageway for
movement of an object to be released and temperature responsive means
at least partially obstructing said passageway to prevent movement of
said object along said passageway past said temperature responsive
means before the temperature of said temperature responsive means
reaches a predetermined release temperature and said temperature
responsive means moving to open said passageway to allow movement of
said object along said passageway past said temperature responsive
means when the temperature of said temperature responsive means
reaches said predetermined release temperature, wherein a base is
provided beneath said release mechanism to receive said object
released by said release mechanism and said base is provided with
electrical switch means which is actuated by said object when received
by said base.
9. A release mechanism comprising a body defining an inclined
passageway for movement of an object to be released from said body and
a bimetallic strip fixedly secured at one end to said body with the
opposite free end of said bimetallic strip at least partially
obstructing said passageway to prevent movement of said object along
said passageway before the temperature of said bimetallic strip
reaches a predetermined release temperature and said free end of said
bimetallic strip moving to open said passageway to allow movement of
said object along said passageway when the temperature of said
bimetallic strip reaches said predetermined release temperature.
10. A release mechanism according to claim 9, wherein the free end
of said bimetallic strip includes a non-metallic tip portion for
contacting said object to prevent movement of said object along said
passageway before the temperature of said bimetallic strip reaches
said predetermined release temperature.
11. A release mechanism according to claim 9, wherein said object
is a ball which rolls down the inclined passageway in said body and is
released from said body when the temperature of said bimetallic strip
reaches said predetermined release temperature, a base being provided
beneath said release mechanism for receiving said ball when released
by said release mechanism.
12. A release mechanism according to claim 11, wherein said base is
designed to produce an audible sound when struck by said ball.
13. A release mechanism comprising a bocy having an opening for
release of an object contained within said body and temperature
responsive means at least partially obstructing said opening to
prevent release of said object from said body before the temperature
of said temperature responsive means reaches a predetermined release
temperature and said temperature responsive means moving to open said
opening to allow release of said object from said body when the
temperature of said temperature responsive means reaches said
predetermined release temperature, wherein said temperature responsive
means is a bimetallic element which is fixedly supported at one
portion thereof with a second portion of said bimetallic element being
position to at least partially obstruct said opening to prevent
release of said object before the temperature of said bimetallic
element reaches said predetermined release temperature and said second
portion of said bimetallic element moving to open said opening and
release said object when the temperature of said bimetallic element
reaches said predetermined release temperature.
14. A release mechanism according to claim 13, wherein said second
portion of said bimetallic element is L-shaped for contacting said
object to prevent release of said object before the temperature of
said temperature responsive means reaches said predetermined release
temperature.
15. A release mechanism according to claim 13, wherein means are
provided for adjusting said predetermined release temperature.
16. A release mechanism comprising a body having an opening for
release of an object contained within said body and temperature
responsive means at least partially obstructing said opening to
prevent release of said object from said body before the temperature
of said temperature responsive means reaches a predetermined release
temperature and said temperature responsive means moving to open said
opening to allow release of said object from said body when the
temperature of said temperature responsive means reaches said
predetermined release temperature, wherein means are provided from
adjusting said predetermined release temperature and wherein said
means for adjusting said predetermined release temperature comprises a
support for said object and means for adjusting the location of said
support relative to said temperature responsive means.
17. A release mechanism comprising a body in the form of a nonkey
having a passageway for movement and release of at least one ball from
said body at a predetermined release temperature, at least one ball
located in said passageway in said body, a bimetallic element mounted
in said body with a portion of said bimetallic element at least
partially obstructing said passageway to prevent movement of said at
least one ball past said bimetallic element and release of said ball
from said body before the temperature of said bimetallic element
reaches a predetermined release temperature and wherein said
bimetallic element moves to open said passageway to allow movement of
said at least one ball past said bimetallic element thereof from said
body when the temperature of said bimetallic element reaches said
predetermined release temperature, and a base located beneath said
body for receiving the at least one ball released from said body.
18. A temperature change indicating assembly comprising an object
to be released when the temperatue reaches a predetermined release
temperature, a temperature responsive release mechanism for retaining
the object before the temperature reaches the predetermined release
temperature and for releasing the object when the temperature reaches
said predetermined release temperature, and indicating means providing
an indication of the release of said object by said temperature
responsive mechanism, wherein said indicating means receives said
object when released by said temperature responsive release mechanism
and visually displays said object to provide said indication.
19. A temperature change indicating assembly according to claim 18,
wherein said indicating means provides an audible sound when said
object is released by said temperature responsive release
mechanism.
20. A temperature change indicating assembly comprising an object
to be released when the temperature reaches a predetermined release
temperature, a temperature responsive release mechanism for retaining
the object before the temperature reaches the predetermined release
temperature and for releasing the object when the temperature reaches
said predetermined release temperature, and indicating means providing
an indication of the release of said object by said temperature
responsive release mechanism, wherein said temperature responsive
release mechanism is positioned above said indicating means so that
said object drops to said indicating means when released by said
temperature responsive release mechanism.