GB2167152A - Operation apparatus - Google Patents
Operation apparatus Download PDFInfo
- Publication number
- GB2167152A GB2167152A GB08520465A GB8520465A GB2167152A GB 2167152 A GB2167152 A GB 2167152A GB 08520465 A GB08520465 A GB 08520465A GB 8520465 A GB8520465 A GB 8520465A GB 2167152 A GB2167152 A GB 2167152A
- Authority
- GB
- United Kingdom
- Prior art keywords
- operation lever
- lock member
- condition
- pushed
- kept
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Control Devices (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Operation apparatus comprises an operation lever (3) which is movable from a starting position to a final position against spring-action (5), and a lock member (6) which is operable to stop the operation lever at an intermediate position during return movement of the operation lever caused by the spring-action. However, lock member (6) is normally kept in an inoperative condition in which it is ineffective to stop the operation lever and is brought into an operative condition in which it is effective to stop the operation lever only when the operation lever is first moved to its final position. If the operation lever does not reach its final position but is, instead, prematurely released, the lever is not held at the intermediate position. It returns to its starting position. <IMAGE>
Description
SPECIFICATION
Operation apparatus
This invention relates to operation apparatus such as used for actuating ignition operation apparatus in a gas appliance such as a gas room heater.
There has been hitherto proposed operation apparatus having an operation lever which is movable from a starting end position to a final end position by pushing thereof against the action of a return spring, and a lock member which is operable to stop the operation lever at an intermediate position during returning movement of the operation lever caused by the action of the return spring. Used in a gas appliance, the operation lever serves to control to open and close a gas valve interposed in a gas passage connected to a gas burner, and an ignition switch for operating an ignition plug provided near the burner, so that there may be obtained a valve closed condition at the starting end position of the operation lever, a valve open and an ignition switch closed condition at the final end position of the lever, and a valve open condition at the intermediate position of the lever.This operation apparatus is inconvenient, however, in that in the course of pushing operation thereof, if the operation lever is released from pushing before reaching the final end position, that is, before completion of the pushing operation thereof, the operation lever is then stopped by the lock member at the intermediate position thereof, that is, in the valve open condition thereof, and thus the burner is supplied with gas under the condition that the burner is not yet ignited.
According to the present invention there is provided operation apparatus comprising an operation member which is movable from a starting position to a final position against spring-action, and a lock member which is operable to stop the operation member at an intermediate position during return movement of the operation member caused by said spring-action, this lock member being normally kept in an inoperative condition in which it is ineffective to stop the operation member, and being brought into an operative condition in which it is effective to stop the operation member only when the operation member is first moved to its final position. Thus, in this apparatus, the operation member will be stopped at its intermediate position when returning thereto under the action of the return spring only if the member was previously moved all the way to its final end position.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1 is a sectional side view of a first form of operation apparatus of a gas room heater,
Figures 2 to 4 are sectional side views of the apparatus showing different operative conditions thereof,
Figure 5 is a perspective view of a part of the apparatus,
Figure 6 is a perspective view of the gas room heater,
Figure 7 is a sectional side view of a second form of operation apparatus,
Figures 8 and 9 are sectional side views showing different operative conditions of the apparatus of Figure 7,
Figure 10 is a sectional side view of a third form of operation apparatus,
Figures 11 to 14 are sectional side views showing different operative conditions of the apparatus of Figure 10,
Figures 16 and 17 are sectional side views showing different operative conditions of the apparatus of Figure 15, and
Figure 18 is a perspective view of a part of the apparatus of Figures 15 to 17.
Referring first to Figures 1 to 6, numeral 1 denotes a gas room heater main body having therein a gas burner not illustrated, numeral 2 denotes a machine frame thereof, and number 3 denotes an operation lever provided on the machine frame 2 through a shaft 4 which has its base end portion pivotally mounted so that the lever 3 may be operated, by pushing thereof, against the action of a return spring 5, from a starting end position at an upper position as shown in Figure 1 to a final end position at a lower position as shown in Figure 3. A lock member 6 is effective for stopping the operation lever 3 at an intermediate position during return movement of the operation lever 3 caused by the action of the return spring 5, as shown in Figure 4.
In more detail, the operation lever 3 is provided, at its base portion, with a downwardly projecting engaging member 7 formed integrally therwith, and is additionally provided, on a side of the engaging member 7, with a subsidiary engaging member 8 which is nearly the same shape as the engaging member 7 and which is supported on the same shaft 4 therewith. This subsidiary engaging member 8 is in engagement, at a rear bent-over edge 8a, with the engaging member 7, and is provided on a lower portion of a front edge with an engaging projection 8b.The lock member 6 is formed by a pin provided on a forward end portion of a supporting arm 9 which is tiltable upwards and downwards, and which is urged upwards by a spring 10 so that the lock member 6 is, normally, tilted upwards by the spring 10 so as to be in abutment with and received by lower surfaces of the engaging members 7, 8 as shown in Figure 1. If, then, the operation lever 3 is pushed downwards for operation, the engaging members 7, 8 are moved rearwards, and the lock member 6 is moved from its lower position as shown in
Figure 1 to its rear position as shown in Figure 3, for instance. If, thereafter, the-operation lever 3 is pushed upwards for returning, the lock member 6 is brought into engagement with the engaging projection 8b, and thereby the operation lever 3 is stopped at the predetermined intermediate position thereof as shown in Figure 4.
If, from this condition, the operation lever 3 is then pushed downwards for returning, the lock member 6 is pushed downwards by a front edge of the engaging member 7 and is released from its engagement with the engaging projection 8b.
The gas room heater main body 1 is also provided therein with a slidable rod 11 which is located to the rear of, that is opposite, the operation lever 3, and the machine frame 2 is, additionally, provided at its upper portion with an ignition switch 12.
If the operation lever 3 is pushed downwards for operation to move from the condition shown in Figure 1, firstly the slidable rod 11 is pushed thereby to move rearwards and a first gas valve 13 provided on the rod 11 is caused to open. At the same time, an electromagnetic safety valve 14 serving as a second gas valve provided to the rear of the rod 11 is pushed by the rod 11 to be opened, as shown in Figure 2, and then, at the final end position of the operation lever 3, that is, at the completion of the pushing stroke thereof, as shown in Figure 3, the switch 12 is pushed thereby to close for igniting the gas burner.Thereafter, eve'n after the operation lever 3 is released from pushing thereof, the electromagnetic safety valve 14 is kept in its open condition by a discharging electric current of a condenser (not illustrated) interposed in a forcible holding circuit and by an electromotive force of a theremo-couple (not illustrated) provided near the burner. At the same time, as shown in Figure 4, the operation lever 3 is stopped by the lock member 6 at the intermediate position, and accordingly the burner can be kept burning. If the operation lever 3 is then pushed upwards for returning, the lever 3 is disengaged from the lock member 6, and is allowed to return to the original rest position, that is, the condition shown in
Figure 1, and accordingly the rod 11 returns to the original position, so that the burner is extinguished.
As so far described, the effect is not especially different from what has been previously proposed but to avoid the inconveniences already described, that otherwise arise from releasing the lever 3 before the final end position is reached, in the present apparatus the lock member 6 is so arranged as to be kept in an inoperative condition in an ordinary case and to be brought into its operative condition only when the operation lever 3 is once moved, by pushing thereof, to the final end position.
In more detail, in the apparatus of Figures 1 to 6, a control cam 15 which is nearly the same shape as the engaging. member 7 and which is supported on the same shaft 4 therewith is so provided on a side of the engaging member 7 that, if the operation lever 3 is.
operated, by pushing thereof, the cam 15 is so pushed thereby, through a claw member 16 provided on the lever 3, as to be inclined rearwards, and consequently, in an ordinary case, the lock member 6 is received from above by a lower edge cam surface 1 5a of the cam 15 to be kept in its inoperative condition, as shown in Figure 2.
If the operation lever 3 is moved to its final end position, that is, the thoroughly pushed position thereof, as shown in Figure 3, the control cam 15 is moved to a position which is to the rear of the lock member 6, and thereby the lock member 6 is allowed to move upwards for being prepared for its operative condition. Namely, the lock member 6 is prepared for such an operative condition that when the operation lever 3 is released from pushing, the lock member 6 stops the operation lever 3 at its intermediate position as shown, for instance, in Figure 4. If the operation lever 3 is then pushed upwards in the returning direction, as shown by an arrow in
Figure 4 the control cam 15 is pushed forwards thereby through the bent-over edge 8a, for being returned to the original position thereof as shown in Figure 1.
In the example shown in Figure 1, the two engaging members 7, 8 are united one with another as a single piece 7, and the lock member 6 is formed by a pin provided on a forward end portion of the supporting arm 9 and is urged upwards by the spring 10 so as to cooperate with the engaging member 7 in almost the same manner as in the foregoing example. In this example, the pin 6 is so arranged as to be previously set in a rearwardly biased position for being kept in its inoperative condition, as follows. Namely, the lock member 6 is mounted in a front and rear directionally extended cam groove 18 made in a control cam 17 pivotally supported on the machine frame 2; is pivotally supported, at a base end portion of the supporting arm 9, on the cam 17; and is- urged rearwards by a spring 19 acting on the arm 9, so as to be ordinarily biased to a rear position in the cam groove 18 as shown in Figure 7, for instance, for being kept in its inoperative condition.
If the operation lever 3 is pushed for operation to move to its final end position, the engaging member 7 is moved to a position which is in front of the lock member 6 as shown in Figure 8 so that the lock member 6 may be prepared for its operative condition.
Accordingly, if the operation lever 3 is then released from pushing thereof, the engaging member 7 is moved forwards along with the lock member 6, and the lock member 6 is stopped at the forward position in the cam groove 18, and thus -the operation lever 3 is stopped at the intermediate position thereof.
In the example of Figures 10 to 14, the two engaging members 7, 8 are united one with another as a single piece 7, and the lock member 6 is so arranged as to be previously set in a biased lower position for being kept in its inoperative condition.
In more detail, the lock member 6 is provided on a forward end portion of a control cam 20 pivotally supported at its base end portion on the machine frame 2. The control cam 20 has applied to it a spring 21, which is provided between the cam 20 and the machine frame 2, so as to be ordinarily changed over beyond a dead point position X-X thereof to be inclined downwards and thereby the lock member 6 may be kept in its lower inoperative condition. Additionally, the control cam 20 is provided thereon with a pin 23 which is projected into a guide opening 22 made in the machine frame 2 and is opposite to a rear edge of the engaging member 7.
If the engaging member 7 is moved rearwards, the cam 20 is pushed thereby through the pin 23 so as to be changed over beyond the dead point position X-X thereof to be inclined upwards, and thereby the lock member 6 may be set in a biased upper operative condition thereof.
To explain this in more detail, if the operation lever 3 is pushed for operation to move from the starting end position shown in Figure 10, the engaging member 7 is, firstly, moved therewith to incline rearwards for pushing the pin 23 as shown in Figure 11, and on this occasion, the control cam 20 is brought near the dead point position X-X thereof as shown in Figure 11. If the operation lever 3 is further pushed, for instance, to the final end position, for instance, the pin 23 is further pushed thereby and the cam 20 is changed over to incline upwards, beyond the dead point position thereof X-X, so that the lock member 6 is moved upwsards and is kept in its operative condition, as shown in Figure 12.
If the operation lever 3 is then released from pushing, the engaging member 7 is brought into engagement with the lock member 6 and thereby is stopped at the intermediate position as shown in Figure 13. If the operation lever 3 is then pushed upwards for returning, the engaging member 7 pushes the control cam 20 downwards through the lock member 6 as shown in Figure 14, and thereby the control cam 20 is inclined downwards to be changed beyond the dead point position X-X for being returned to the original condition shown in
Figure 10.
In this embodying example, the second gas valve 14 is a cut-off type that is kept in its open condition only manually.
In the example of Figures 15 to 18, the two engaging members 7, 8 are united one with another as a single piece 7 which projects upwards, and a control cam 24 which is supported on the same shaft 4 with the engaging member 7 is so provided on a side thereof that, if the operation lever 3 is pushed for operation, the control cam 24 is pushed thereby, through a claw member 25 projecting laterally from the cam 24, so as to be inclined rearwards. Additionally the lock member 6 is formed of a claw member provided on a forward end portion of a supporting arm 9 and is urged downwards by a spring 10, so that the lock member may be ordinarily in abutment from above with an upper edge cam surface 7a of the engaging member 7 and an upper edge cam surface 24a of the control cam 24.In this example, as shown clearly in
Figure 18, for instance, the cam surface 24a extends more or less longer rearwards than the cam surface 7a. Thus, only when the operation lever 3 is pushed for operation, to move to the final end position as shown in
Figure 16, is the lock member 6 brought into engagement with a shoulder portion 24b formed at a rear end of the cam surface 24a, for being ready for its operative condition as shown in Figure 16 and Figure 18. If the operation lever 3 is released from pushing, it is stopped at its intermediate position as shown in Figure 16.
In this example, the operation lever 3 is a main operation lever and a subsidiary operation lever 26 is provided aside the main operation lever 3. If the subsidiary operation lever 26 is pushed for operation, the lock member 6 is pushed thereby upwards so as to be released from the engagement thereof with the shoulder portion 245b and is returned to its original ordinary condition.
Operation, referring to Figures 1 to 6, is as follows:
If the operation lever 3 is pushed downwards for operation to move from the starting end position as shown in Figure 1 to any position before it reaches the final end position, that is, before the thoroughly pushed position thereof, then, as shown in Figure 2 for instance, the lock member 6 remains engaged with the lower surface of the control cam 15 and thereby can never be moved upwards, and thus the lock member is kept in its inoperative condition. Under this condition, if the operation lever 3 is released from pushing, the lever 3 is not stopped at its intermediate position. If, however, the operation lever 3 is so pushed as to be once moved to the final end position, for instance, as shown in Figure 3, the lock member 6 becomes disengaged from the control cam 15 and is allowed to be moved upwards as shown in Figure 3.If the operation lever 3, under this condition, is then released from pushing, it is engaged with the upwardly moved lock member 6 and thereby is stopped at its intermediate position.
Almost the same operation as above can be obtained with any of the other examples.
Thus, the lock member is so arranged as to be kept in-its inoperative condition in an ordinary case and to be brought into its operative condition only when the operation lever (or the main operation lever) is once moved, by pushing thereof, to the final end position thereof, so that there can be avoided an unfavourable stopping of this operation lever by the lock member if this operation lever is released from pushing before it reaches the final end position In this way discharge of unburned gas in the case of a gas room heater or the like can be prevented, and the apparatus can be made comparatively simple in construction and small in size.
Claims (7)
1. Apparatus comprising an operation member which is movable from a starting position to a final position against spring-action, and a lock member which is operable to stop the operation member at an intermediate position during return movement of the operation member caused by said spring-action, this lock member being normally kept in an inoperative condition in which it is ineffective to stop the operation member, and being brought into an operative condition in which it is effective to stop the operation member only when the operation member is first moved to its final position.
2. Operation apparatus as claimed in claim 1, wherein the lock member is arranged to be released from its operative condition if the operation member is pushed for returning from the intermediate position towards the starting position.
3. Operation apparatus as claimed in claim 1, wherein the operation member is first such member, and wherein there is provided, a second operation member such that the lock member may be released from its operative condition if the second operation member is pushed for operation
4. Operation apparatus as claimed in claim 1, 2 or 3, wherein the lock member is brought into engagement with a control cam means, in an ordinary case, for being kept in its inoperative condition.
5. Operation apparatus as claimed in claim 1, 2 or 3, wherein the lock member is moved to a forwardly biased position in a cam groove, in an ordinary case, for being kept in its inoperative condition.
6. Operation apparatus as claimed in claim 1, 2 or 3, wherein the lock member is changed over beyond a dead point to an outwardly biased position thereof, in an ordinary case, for being kept in its inoperative condition.
7. Operation apparatus substantially as hereinbefore described with reference to Figures 1 to 6, or Figures 7 to 9, or Figures 10 to 14, or Figures 15 to 18 of the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59200381A JPS6179913A (en) | 1984-09-27 | 1984-09-27 | Pressing operation device |
| JP59260083A JPS61138026A (en) | 1984-12-11 | 1984-12-11 | Pushing control device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8520465D0 GB8520465D0 (en) | 1985-09-18 |
| GB2167152A true GB2167152A (en) | 1986-05-21 |
| GB2167152B GB2167152B (en) | 1988-05-25 |
Family
ID=26512153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08520465A Expired GB2167152B (en) | 1984-09-27 | 1985-08-15 | Operation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2167152B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019011908A (en) * | 2017-06-30 | 2019-01-24 | 株式会社ハーマン | Combustion gas amount control device |
-
1985
- 1985-08-15 GB GB08520465A patent/GB2167152B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019011908A (en) * | 2017-06-30 | 2019-01-24 | 株式会社ハーマン | Combustion gas amount control device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2167152B (en) | 1988-05-25 |
| GB8520465D0 (en) | 1985-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020815 |