CA1139972A - Manually driven generating mechanism for doorbells - Google Patents
Manually driven generating mechanism for doorbellsInfo
- Publication number
- CA1139972A CA1139972A CA000359079A CA359079A CA1139972A CA 1139972 A CA1139972 A CA 1139972A CA 000359079 A CA000359079 A CA 000359079A CA 359079 A CA359079 A CA 359079A CA 1139972 A CA1139972 A CA 1139972A
- Authority
- CA
- Canada
- Prior art keywords
- spring
- gear
- mechanism according
- unstressed
- stressed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to an improved gyro-type manually operated dynamo mechanism applied to appliances consuming limited momentary power. Energy is stored by streesing a spring which, when released, keeps in mechanical connection with a train of acceler-ation gears terminating in a relatively heavy flywheel when the stressed spring is released to resume its unstressed state, and disconnects therewith when the spring reaches unstressed condition and allow the fly-wheel to rotate freely, thereby enhancing the exploita-tion of the energy stored in the flywheel in the form of inertia to produce the requisite electricity to sound the buzzer.
The present invention relates to an improved gyro-type manually operated dynamo mechanism applied to appliances consuming limited momentary power. Energy is stored by streesing a spring which, when released, keeps in mechanical connection with a train of acceler-ation gears terminating in a relatively heavy flywheel when the stressed spring is released to resume its unstressed state, and disconnects therewith when the spring reaches unstressed condition and allow the fly-wheel to rotate freely, thereby enhancing the exploita-tion of the energy stored in the flywheel in the form of inertia to produce the requisite electricity to sound the buzzer.
Description
~b The present invention i5 concerned with a mechanism adapted to house appliances which require very little power to work in use and the using time of which is transient, for example, door bells, which mechanism is manually driven to produce the requisite electricity for use.
In view of the incessantly increasing population and shrinking energy source of the world, it is predictable that the seriousness of the energy crisis will only change from bad to worse in the future few years. Undèr such cir-sumstances, it is critically urgent to decrease reliance uponconventional fossil fuels.
In fact, some appliances which consume little power because they are devised to work only momentarily rather than continuously in use, for example door bells, can be energized manually, easily, and conveniently by the user himself to bring it into operation without the need for a power source, thus expelling the extra accessories such as wire and plug, or batteries, saving the consumpkion oE cells, and obviating the trouble or replacing exhausted cells. Such devices adapt best to those places where necessities are scant due to poor trans-portation.
Presently known means operated manually by the user - to convert his strength into available potential energy stored in mechanical devices within a transient period, and then re-lease the energy for use within a short moment fall into two categories. The function of the first class i5 accomplished by compressing a spring or the like, and then releasing it to exploit the energy stored therein. Since the spring resumes very quickly, the period of operation is too short for `
practical use. ~lthouyh the period of operation can be pro-longed by mechanically connecting the spring with an accele-rating gear train t~ansmitting the motion to a relatively ~", heavy, terminal flywheel, whereby the rate of resumption of the spring is reduced in view of the relationship b~tween mass and acceleration: ~ = ma, when the spring resumes its unstressed position, the flywheel still possess con-siderable inextia, which however is not practically avail~
able since the further rotation results in the streiching of the spring which, unless mechanically disconnected with the gear train immediately after it has reached its equilibrium point, will inevitably countervail the momentum of the fly-wheel and give rise to considerable loss in the availableenergy stored in the form of the inertia therein. In this case the spring is first stretched to an extent due to the inertia of the flywheel after passing its equilibrium poin-t, and then retracts and force the flywheel to counter-rotate.
~eedless to say, in the damping process, much available energy is lost.
Another class is found in friction drive toys, which is basically in common with the gyrobus in terms of the driving system involving a rapidly spinning flywheel. The ordinary manner of playing with such a toy by rubbing its wheels vigorously against a flat plane however, is not adapted to be applied to door bells. Although the flywheel can be energized by rocking a crank arm connected to the first gear of the accelerating gear train, this method is not altogether satisfactory since the crank arm appears unsightly and clumsy at the door. Moreover, the manner clamping the crank arm to rock it does not coincide with ordinary habit by pushing a button or pulling a cord.
According to the invention there is provided a manually driven generating mechanism for door bells, comprising:
a dynamo to supply power, a spring' a means to stress said spring' a train of acceleration gears mechanically connected
In view of the incessantly increasing population and shrinking energy source of the world, it is predictable that the seriousness of the energy crisis will only change from bad to worse in the future few years. Undèr such cir-sumstances, it is critically urgent to decrease reliance uponconventional fossil fuels.
In fact, some appliances which consume little power because they are devised to work only momentarily rather than continuously in use, for example door bells, can be energized manually, easily, and conveniently by the user himself to bring it into operation without the need for a power source, thus expelling the extra accessories such as wire and plug, or batteries, saving the consumpkion oE cells, and obviating the trouble or replacing exhausted cells. Such devices adapt best to those places where necessities are scant due to poor trans-portation.
Presently known means operated manually by the user - to convert his strength into available potential energy stored in mechanical devices within a transient period, and then re-lease the energy for use within a short moment fall into two categories. The function of the first class i5 accomplished by compressing a spring or the like, and then releasing it to exploit the energy stored therein. Since the spring resumes very quickly, the period of operation is too short for `
practical use. ~lthouyh the period of operation can be pro-longed by mechanically connecting the spring with an accele-rating gear train t~ansmitting the motion to a relatively ~", heavy, terminal flywheel, whereby the rate of resumption of the spring is reduced in view of the relationship b~tween mass and acceleration: ~ = ma, when the spring resumes its unstressed position, the flywheel still possess con-siderable inextia, which however is not practically avail~
able since the further rotation results in the streiching of the spring which, unless mechanically disconnected with the gear train immediately after it has reached its equilibrium point, will inevitably countervail the momentum of the fly-wheel and give rise to considerable loss in the availableenergy stored in the form of the inertia therein. In this case the spring is first stretched to an extent due to the inertia of the flywheel after passing its equilibrium poin-t, and then retracts and force the flywheel to counter-rotate.
~eedless to say, in the damping process, much available energy is lost.
Another class is found in friction drive toys, which is basically in common with the gyrobus in terms of the driving system involving a rapidly spinning flywheel. The ordinary manner of playing with such a toy by rubbing its wheels vigorously against a flat plane however, is not adapted to be applied to door bells. Although the flywheel can be energized by rocking a crank arm connected to the first gear of the accelerating gear train, this method is not altogether satisfactory since the crank arm appears unsightly and clumsy at the door. Moreover, the manner clamping the crank arm to rock it does not coincide with ordinary habit by pushing a button or pulling a cord.
According to the invention there is provided a manually driven generating mechanism for door bells, comprising:
a dynamo to supply power, a spring' a means to stress said spring' a train of acceleration gears mechanically connected
- 2 -%
to said means; a clutching device w~ich contrc,ls the engage-ment or disengagement between said means and the first gear of said acceleration gears, a relatively heavy flywheel, with its t~o ends respectively connected to the last gear of said acceleration gears, and to the rotary shaft of said dynamo, said means being adapted to be conveniently operated by hand to bring said spring into a stressed state; said clutching device enabling said means and the first gear of said accelerating gears to connect mechanically with each other before the stressed spring resumes its original, unstressed position, and to disconnect with each other when said spring reaches its unstressed state.
In a particular embodiment the mechanism may further include a buzzer adapted to be energized by the dynamo.
Accordingly~, it is the object of the present invention to provide an improved gyro-type manually energizing mechanism to obviate and mitigate the afore-said disadvantages.
According to an aspect of this invention the foregoing disadvantages are overcome by means of a
to said means; a clutching device w~ich contrc,ls the engage-ment or disengagement between said means and the first gear of said acceleration gears, a relatively heavy flywheel, with its t~o ends respectively connected to the last gear of said acceleration gears, and to the rotary shaft of said dynamo, said means being adapted to be conveniently operated by hand to bring said spring into a stressed state; said clutching device enabling said means and the first gear of said accelerating gears to connect mechanically with each other before the stressed spring resumes its original, unstressed position, and to disconnect with each other when said spring reaches its unstressed state.
In a particular embodiment the mechanism may further include a buzzer adapted to be energized by the dynamo.
Accordingly~, it is the object of the present invention to provide an improved gyro-type manually energizing mechanism to obviate and mitigate the afore-said disadvantages.
According to an aspect of this invention the foregoing disadvantages are overcome by means of a
- 3 -'7;~
detachable transmission mechanism which is preferably positioned between the first gear of the accelerating train gears and the device through which the force is exerted to effect the engagement and disengagement thereof, thereby exploiting the residual kinetic energy stored in the flywheel in the form of inertia.
These objects of this invention will be accom-panied by embodiments as referred to in relation with the annexed drawing of this invention as following.
FIGURE 1 is a perspective view of a gear provided with a crank arm' FIGURE 2 is a perspective view of an embodiment according to this invention, FIGURE 3 is a top view of another embodiment according to thi.s invention, FIGURE 3A is an enlarged view of the detachable transmission mechanism of Figure 3, and Figure 3B is a further magnified view of the push button thereof.
FIGURE 4 shows another winding device.
EMBODIMF.~T I
With reference to Figure 2, the energy is stored in the tightly wound spiral spring (22) by twisting winding knob (21) to turn the intermittent gear (23) coaxially mounted on the winding shaft. Knob ~21) is provided with a ward (24) which, together with the stop pin (25), prevents the undue overwinding thereof, since if the notch of the intermittent gear (23) is turned to meet the first gear (26) so that their teeth are no more in mesh with each other, when winding knob (21) is ~.
~3~
released, the too-th located on the edge of notch, not in mesh with anything, is first swivelled back rapidly under the resumptive force of the spiral spring, and strikes the teeth of gear (26) before it meshes with the latter, thus glving rise to the wear of their teeth. For this reason, stop pin (25) should be so positioned that when ward (24) is turned to stop pin (25) and is hampered thereby, intermittent gear (23) still keeps in mesh with gear (26).
When the windup knob ~21) is released, the resilience of spiral spring will force intermittent gear (23) to counter-rotate, to drive flywheel (27) mounted on the rotary shaft of a dynamo (28) through the trans-mission of a train of gears to produce an electric current with a voltage of ~-8 volt which is far enough to sound a buzzer (not shown in the drawing). When spiral spring (22) resumes its unstressed condition, meanwhile the notch of intermittent gear (23) has already reached the meshing position of intermittent gear (23) and gear (2~) and resulted in the disengagement thereof, thus leaving flywheel (27) spinning freely for a moment until it gradually slowing down, and making the best of the residual kinetic energy stored in the flywheel.
EMBODIME~T II
Referring now to Figure 3, Figure 3A and Figure 3B, there are shown a top view of a modification according to this invention, which as well as what is illustrated in Embodiment I, comprises a train of accelerating gears and a flywheel operably mounted to a dynamo. It differs with that in Embodiment I only in that it is operated by pushing a button instead of turning a knob, and re-placing -the sector gear of the latter by a straight toothing structure.
The pushing button comprises a cylindrical button (31) whereinto a compression coil spring is incorporated, and a guide seat (32). Button (31) is provided with a vertical rack (31) on the side adjacent to the gear train, which rack (31) is positioned in such a manner that when button (31) is released, it engages with pinion (26') all the time before the coil spring resumes its equilibrium point, and disengages therewith immediately when the coil spring reaches its original, unstressed state.
The above two exemplary embodiments, however, do not limit the scope of this invention. For example, the winding knob (21) in Embodiment I can be inferentially substituted by a spool wrapped by a cord. In use, the cord is pull to wind up the spiral spring. The optimal angle of rotation of the sector gear can be accomplished by choosing proper length of the cord.
Although the detaching effect of the mechanical connection according to this invention can also be achieved by using one way freewheel mechanism, this however, will necessitate relatively complicated layout, thus entailing high cost and increasing the probability of trouble thereof.
~l~3~
It will be understood that this invention is susceptible to further modification and, accordingly, it i5 desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.
detachable transmission mechanism which is preferably positioned between the first gear of the accelerating train gears and the device through which the force is exerted to effect the engagement and disengagement thereof, thereby exploiting the residual kinetic energy stored in the flywheel in the form of inertia.
These objects of this invention will be accom-panied by embodiments as referred to in relation with the annexed drawing of this invention as following.
FIGURE 1 is a perspective view of a gear provided with a crank arm' FIGURE 2 is a perspective view of an embodiment according to this invention, FIGURE 3 is a top view of another embodiment according to thi.s invention, FIGURE 3A is an enlarged view of the detachable transmission mechanism of Figure 3, and Figure 3B is a further magnified view of the push button thereof.
FIGURE 4 shows another winding device.
EMBODIMF.~T I
With reference to Figure 2, the energy is stored in the tightly wound spiral spring (22) by twisting winding knob (21) to turn the intermittent gear (23) coaxially mounted on the winding shaft. Knob ~21) is provided with a ward (24) which, together with the stop pin (25), prevents the undue overwinding thereof, since if the notch of the intermittent gear (23) is turned to meet the first gear (26) so that their teeth are no more in mesh with each other, when winding knob (21) is ~.
~3~
released, the too-th located on the edge of notch, not in mesh with anything, is first swivelled back rapidly under the resumptive force of the spiral spring, and strikes the teeth of gear (26) before it meshes with the latter, thus glving rise to the wear of their teeth. For this reason, stop pin (25) should be so positioned that when ward (24) is turned to stop pin (25) and is hampered thereby, intermittent gear (23) still keeps in mesh with gear (26).
When the windup knob ~21) is released, the resilience of spiral spring will force intermittent gear (23) to counter-rotate, to drive flywheel (27) mounted on the rotary shaft of a dynamo (28) through the trans-mission of a train of gears to produce an electric current with a voltage of ~-8 volt which is far enough to sound a buzzer (not shown in the drawing). When spiral spring (22) resumes its unstressed condition, meanwhile the notch of intermittent gear (23) has already reached the meshing position of intermittent gear (23) and gear (2~) and resulted in the disengagement thereof, thus leaving flywheel (27) spinning freely for a moment until it gradually slowing down, and making the best of the residual kinetic energy stored in the flywheel.
EMBODIME~T II
Referring now to Figure 3, Figure 3A and Figure 3B, there are shown a top view of a modification according to this invention, which as well as what is illustrated in Embodiment I, comprises a train of accelerating gears and a flywheel operably mounted to a dynamo. It differs with that in Embodiment I only in that it is operated by pushing a button instead of turning a knob, and re-placing -the sector gear of the latter by a straight toothing structure.
The pushing button comprises a cylindrical button (31) whereinto a compression coil spring is incorporated, and a guide seat (32). Button (31) is provided with a vertical rack (31) on the side adjacent to the gear train, which rack (31) is positioned in such a manner that when button (31) is released, it engages with pinion (26') all the time before the coil spring resumes its equilibrium point, and disengages therewith immediately when the coil spring reaches its original, unstressed state.
The above two exemplary embodiments, however, do not limit the scope of this invention. For example, the winding knob (21) in Embodiment I can be inferentially substituted by a spool wrapped by a cord. In use, the cord is pull to wind up the spiral spring. The optimal angle of rotation of the sector gear can be accomplished by choosing proper length of the cord.
Although the detaching effect of the mechanical connection according to this invention can also be achieved by using one way freewheel mechanism, this however, will necessitate relatively complicated layout, thus entailing high cost and increasing the probability of trouble thereof.
~l~3~
It will be understood that this invention is susceptible to further modification and, accordingly, it i5 desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.
Claims (7)
1. A manually driven generating mechanism for door bells, comprising:
a dynamo to supply power, a spring;
a means to stress said spring;
a train of acceleration gears mechanically connected to said means:
a clutching device which controls the engagement or disengagement between said means and the first gear of said acceleration gears;
a relatively heavy flywheel, with its two ends respectively connected to the last gear of said acceleration gears, and to the rotary shaft of said dynamo;
said means being adapted to be conveniently operated by hand to bring said spring into a stressed state;
said clutching device enabling said means and the first gear of said accelerating gears to connect mechanically with each other before the stressed spring resumes its original, unstressed position and to dis-connect with each other when said spring reaches its unstressed state.
a dynamo to supply power, a spring;
a means to stress said spring;
a train of acceleration gears mechanically connected to said means:
a clutching device which controls the engagement or disengagement between said means and the first gear of said acceleration gears;
a relatively heavy flywheel, with its two ends respectively connected to the last gear of said acceleration gears, and to the rotary shaft of said dynamo;
said means being adapted to be conveniently operated by hand to bring said spring into a stressed state;
said clutching device enabling said means and the first gear of said accelerating gears to connect mechanically with each other before the stressed spring resumes its original, unstressed position and to dis-connect with each other when said spring reaches its unstressed state.
2. A mechanism according to claim 1, wherein said spring comprises a spiral spring, and said means to stress said spring comprises a knob.
3. A mechanism according to claim 1, wherein said spring comprises a spiral spring and said means to stress said spring comprises a spool wrapped by a chord.
4. A mechanism according to claim 1, wherein said spring comprises a coil spring and said means to stress said spring comprises a push button.
5. A mechanism according to claim 1, 2 or 3, in which said clutching device comprises an intermittent gear which is so structured and installed that it can mesh with the first gear of said gear train before the stressed spiral spring resumes its unstressed state, and once the spiral spring reaches its unstressed position it will no longer be in mesh with said gear.
6. A mechanism according to claim 4, in which said clutching device comprises a rack immovably installed on said push button, said rack being so positioned and structured that it can engage with the first gear of said acceleration gear train before the stressed coil spring resumes its unstressed state, and disengage therewith when the coil spring reaches its unstressed position.
7. A mechanism according to claim 1, 2 or 3, further including a buzzer adapted to be energized by said dynamo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000359079A CA1139972A (en) | 1980-08-27 | 1980-08-27 | Manually driven generating mechanism for doorbells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000359079A CA1139972A (en) | 1980-08-27 | 1980-08-27 | Manually driven generating mechanism for doorbells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1139972A true CA1139972A (en) | 1983-01-25 |
Family
ID=4117742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000359079A Expired CA1139972A (en) | 1980-08-27 | 1980-08-27 | Manually driven generating mechanism for doorbells |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1139972A (en) |
-
1980
- 1980-08-27 CA CA000359079A patent/CA1139972A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |