Lubricating-oil control device for use in machines, for instance machine tools

Claim 2

A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a first chamber of predetermined capacity having first and second discharge of openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, a second chamber in communication with the machine and with said first chamber for admitting lubricant to said first chamber, a third chamber in communication with said first and second discharge openings and in communication with said reservoir for admitting lubricant to said reservoir, lubricant level sensing means comprising a float in said first chamber, and signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said first chamber is below said second discharge opening.

Claim 3

A machine lubrication system according to claim 1 wherein said second discharge opening is located in a plane above said first discharge opening.

Claim 4

A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising a relay circuit actuated by said switch, a visual signal switch enabled by said relay circuit for operating a visual signal, and an AND gate having a first input enabled by said relay circuit and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.

Claim 5

A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising a relay circuit actuated by said switch, a visual signal switch enabled by said relay circuit for operating a visual signal, and an AND gate having a first input enabled by said relay circuit and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.

Claim 6

A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising an AND gate having a first input from means operated by said switch and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.

Claim 7

A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising an AND gate having a first input from means operated by said switch and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.