US Patent: 987,177
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| Engine
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Patentee:
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| Daniel R. Scholes (exact or similar names) - Chicago, IL |
| USPTO Classifications: |
| 74/3 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 26, 1909 |
| Granted: |
Mar. 21, 1911 |
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Joel Havens
"Vintage Machinery" entry for Aermotor Co.
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Description: |
| Abstract:
My invention relates to engines and, in particular, to the governing mechanism thereof which is of such a character as to make the invention of especial utility when adapted to hydro-carbon engines.
Difficulty has been hitherto experienced in properly governing the speed of hydrocarbon engines and particularly those of the gasolene type, owing to vibration and non-uniform propulsive action which occasion incalculable effect upon the governing mechanism due to inertia.
It is an object of my invention to remove the influence of inertia from the governing mechanism as far as is practicable and desirable, in order that such governing mechanism may, in the main, be limited to the action of centrifugal force thereupon.
In the preferred embodiment of my invention, the governing mechanism includes an actuating member responsive to centrifugal force and mounted to swing upon an element rotatively driven by the engine and in a plane transverse to the plane of rotation of said rotatively driven element, this arrangement largely eliminating the effect of inertia upon the governing mechanism. This actuating member is preferably pivotally mounted between its ends upon the rotatively driven element, which may be the fly-wheel, there being desirably a spring operating upon one end of the actuating member to hold the actuating member idle when the engine does not exceed a predetermined speed, said member being weighted upon its other end so as to respond to centrifugal force when the engine exceeds the predetermined speed.
A common method of governing the speed of hydro-carbon engines, particularly those of the gasolene type resides in delaying the closure of the exhaust valves when the engines exceed their predetermined speeds, to which end the governing mechanisms include detaining mechanisms which are caused to operate upon the exhaust valve structures, when the engines exceed predetermined speeds, to engage the exhaust valve structures to hold the exhaust valves open, these detaining mechanisms being removed out of range with the exhaust valve structures when the engines do not exceed predetermined speeds. In practicing my invention, I use a detaining mechanism as a part of the governing mechanism, for the purpose stated, an element of the detaining mechanism desirably being positively moved by the actuating member whether such member is responding to centrifugal or spring force.
Claims:
l. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating with said rotatively driven element and movable with respect to the rotatively driven element, a member operating upon said part of the detaining mechanism mounted to swing upon said rotatively driven element in a plane transverse to the plane of rotation of the rotatively driven element and moving in response to centrifugal force arising when the engine exceeds predetermined speed, to cause operation of the detaining mechanism through its aforesaid part to hold the exhaust valve open, and means whereby said part of the detaining mechanism is prevented from having material movement relative to the rotatively driven element longitudinally of the axis of rotation of said rotatively driven element to avoid the effect of inertia thereupon when the engine is shaken longitudinally of said axis, the combined weight of said member and the part of the detaining mechanism moving therewith being substantially equally distributed upon both sides of the mounting of said member, whereby substantially equal opposing turning moments due to inertia are set up.
2. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating with said rotatively driven element and movable with respect to the rotatively driven element, a member operating upon said part of the detaining mechanism mounted to swing upon said rotatively driven element in a plane transverse to the plane of rotation of said rotatively driven element and moving in response to centrifugal force arising when the engine exceeds predetermined speed, to cause operation of the detaining mechanism through its aforesaid part to hold the exhaust valve open, the combined weight of said member and the part of the detaining mechanism moving therewith being substantially equally distributed upon both sides of the mounting of said member, whereby substantially equal opposing turning movements due to inertia are set up.
3. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating with said rotatively driven element and movable with respect to the rotatively driven element, a member operating upon said part of the detaining mechanism mounted to swing upon the rotatively driven element and moving in response to centrifugal force arising when the engine exceeds predetermined speed, to cause operation of the detaining mechanism through its aforesaid part to hold the exhaust valve open, the combined weight of said member and the part of the detaining mechanism moving therewith being substantially equally distributed upon both sides of the mounting of said member whereby substantially equal opposing turning moments due to inertia are set up, and means whereby said part of the detaining mechanism is prevented from having material movement relative to the rotatively driven element to avoid the effect of inertia thereupon when the engine is shaken longitudinally of said axis.
4. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating with said rotatively driven element and movable with respect to the rotatively driven element, and a member operating upon said part of the detaining mechanism mounted to swing upon the rotatively driven element and moving in response to centrifugal force arising when the engine exceeds predetermined speed, to cause the operation of the detaining mechanism through its aforesaid part to hold the exhaust valve open, the combined weight of said member and the part of the detaining mechanism moving therewith being substantially equally distributed upon both sides of the mounting of said member whereby substantially equal opposing turning moments due to inertia are set up.
5. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating with said rotatively driven element and movable with respect to the rotatively driven element across its axis of rotation and a second part in traveling engagement with the aforesaid part of the detaining mechanism and interposed between the same and the exhaust valve of the engine, a member capable of operating upon the first aforesaid part of the detaining mechanism and mounted to swing upon the rotatively driven element in a plane transverse to the plane of rotation of said rotatively driven element and capable of moving in response to centrifugal force arising when the engine exceeds predetermined speed, to cause operation of the detaining mechanism through its first aforesaid part to hold the exhaust valve open, and a spring adapted sufficiently to oppose the action of centrifugal force upon said member when the engine is not exceeding its predetermined speed to free the detaining mechanism from the exhaust valve.
6. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part movable across the axis of rotation of said rotatively driven element, and a member capable of operating upon said part of the detaining mechanism and mounted to swing upon said rotatively driven element in a plane transverse to the plane of rotation of said rotatively driven element and capable of moving in response to centrifugal force arising when the engine exceeds predetermined speed, to cause operation of the detaining mechanism through its aforesaid' part to hold the exhaust valve open.
7. An engine having a speed governing mechanism Which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating With said rotatively driven element and movable across its axis of rotation, a member capable of operating upon said part of the detaining mechanism and mounted to swing upon said rotatively driven element in a plane transverse to the plane of rotation of said rotatively driven element and member when the engine is not exceeding predetermined speed, to free the detaining mechanism from the exhaust valve.
8. An engine having a speed governing mechanism which includes an element rotatively driven by the engine, exhaust valve detaining mechanism containing a part rotating with said rotatively driven element and movable with respect to the rotatively driven element across its axis of rotation, and a member capable of operating upon said part of the detaining mechanism and mounted to swing upon said rotatively driven element in a plane transverse to the plane of rotation of said rotatively driven element and capable of moving in response to centrifugal force arising when the engine exceeds predetermined seed, to cause operation of the detaining mechanism through its aforesaid part to hold the exhaust valve open.
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