Le Roi Co. - Assigned Patents | VintageMachinery.org

Manufacturers Index - Le Roi Co.

Le Roi Co.
Milwaukee, WI, U.S.A.
Manufacturer Class: Steam and Gas Engines

Patents

This page contains information on patents issued to this manufacturer.

Submitting Patent Information

If you find a patent number or patent date by this manufacturer that is not on this list, please contact the Site Historian.

Key to Links for Patent Information

USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number	Date	Title	Name	City	Description
1,620,917	Mar. 15, 1927	Internal-Combustion engine	Charles W. Pendock	Milwaukee, Milwaukee County, WI	Abstract: This invention relates to improvements in internal combustion engines of the type in which the main reservoir for coolant is disposed directly above the engine cylinder, and in which the cooling action is largely one of evaporation, as distinguished from engines in which the reservoir for a considerable part of the coolant is disposed as a usually distinct organization adapted mainly for cooling by radiation. More particularly this invention relates to a detachable head motor of this type in which the circulation of the cooling medium is controlled in a manner adapted to render the cooling of such an engine more efficient. Claim: The combination with an evaporation-cooled internal combustion engine having a cylinder and a jacket, of a reservoir unit provided above the normal level of coolant with an opening affording free communication with the atmosphere and, removably connected with said jacket in communication with the space between the jacket and cylinder, and a removable cylinder head connected with said reservoir unit for attachment and removal therewith.
1,734,181	Nov. 25, 1929	Internal-Combustion Engine	Charles W. Pendock	Milwaukee, Milwaukee County, WI	Abstract: This invention relates to improvements in internal combustion engines and, more particularly, to the power transmitting mechanism of such engines. It is well known that internal combustion engines do not run efficiently at low speeds and although it is possible, by proper design, to control within limits the speeds at which a given engine will operate efficiently, it is nevertheless a fact that for many purposes the range of speeds through which, such engines can be made to operate has been far too limited and it has been necessary to use reduction gearing. Internal combustion engines of relatively small size and low power may be used with great effectiveness for driving comparatively Heavy machinery at slow speeds. Concrete mixers and other like machinery driven at relatively slow speeds would impose heavy, if not impossible, burdens upon a small engine if the engine were coupled directly to the mixers. If, however, a 2:1 reduction gearing is employed to connect the gearing with the mixer, the motor is allowed to run at speeds enabling it to operate efficiently and the torque transmitted to the mixer is- double that which would be obtained if the engine were coupled directly thereto. The above statement is intended merely to be general and has obviously left out of consideration such minor losses as friction losses in the reduction gearing. It frequently happens that a manufacturer of internal combustion engines supplies such engines to various manufacturers of special machinery. In many instances, the work for which the engine is desired is such that it may be 'directly coupled to the machinery which it is to drive. In other instances, such as that above mentioned, it is desirable to couple the driven machinery to the engine through reduction gearing. In these latter instances, probably the most usual ratio in the reduction ,gearing is the ratio of 2:1. At any rate, it will be evident that an engine designed to render its power available either in direct ratio or in the ratio of 2:1 will have a far wider variety of uses than would an engine without this feature. Claim: An internal combustion engine including a crank shaft, a crank case provided with journals for the crank shaft, a cam shaft having a portion adequate for the transmission of full engine power, a housing enclosing said cam shaft portion and provided with adequate bearings therefor, said housing being in communication with the interior of said crank case, an oil collecting channel above one of said bearings and provided with a passage leading thereto, intermeshing gearing upon the crank shaft and the cam shaft within said housing, and means for maintaining a constant level of oil in said housing, tie level being such that one of said gears will dip therein whereby said gearing and said bearing are lubricated.
1,970,371	Aug. 14, 1934	Air Compressor Engine	John Roy Frantz	Wauwatosa, Milwaukee County, WI	Continuation of application Serial No. 288,564, June 27, 1928. This application. September 6, 1932, Serial No. 631,786.This invention relates to improvements in air compressor engines. The present application is a continuation of application Serial No. 288,564 filed June 27, 1928. Abstract: It is the object of the invention to overcome, without interference with standardization of engine parts, the difficulties inherent in the means heretofore employed for building up auxiliary supplies of compressed air, such as are required incidentally to the operation of locomotives, derricks, hoists, excavators and the like, for which power is furnished by internal combustion engines. Claim: In an internal combustion engine, the combination of a series of six engine cylinders arranged with their centers vertical in a common plane and spaced to be-normally closely adjacent one another, pistons in said cylinders, connecting rods receiving motion from said pistons, a crank case, main bearings including two central bearings, a crank shaft journaled in said main bearings and provided with five crank portions for said connecting rods including a single crank portion for the connecting rods of the two adjacent central cylinders and positioned between said central main bearings, bearings spaced apart on said single crank portion for the last mentioned connecting rods, a pump cylinder fixed with said crank case for the center thereof to be offset from said plane and at a substantial angle with respect thereto, and providing inlet and outlet means independent of said engine cylinders, a piston reciprocable in said pump cylinder, and a connecting rod delivering motion to said pump piston and deriving motion from said single crank portion and between and independently of the connecting rods of said adjacent central engine cylinders.
2,003,351	Jun. 04, 1935	Power Control	Paul E. Eells	West Allis, Milwaukee County, WI	Abstract: The particular apparatus illustrated in the drawings comprises a multiple power unit for use in oil fields where its power is employed in drilling and driving and pumping out wells. In such a device, and in many other devices of like characteristics, it is desirable to9 provide a remote control mechanism capable not, alone of regulating the rate of operation of the internal combustion engine from which power is derived, but capable also of operating the clutch and brake devices of one or any number of power units in synchronization from a remote point. In referring to the synchronous operation o the controls, I refer not merely to the manipulation of identical clutches or brake mechanisms in a plurality of units, but to the improperly timed operation of clutches and brakes in a single unit to produce the desired effect on the power cutout. Claim: The combination with a plurality of power and transmission units having Individual shaft controls and power delivery shafts coupled together, of an independently portable remote control station, and means at said station provided with power transmitting connections for the synchronous operation of the controls of the several units.
2,380,226	Jul. 10, 1945	Automatic Compressor Regulator	John R. Frantz	Wauwatosa, Milwaukee County, WI	Abstract: The present invention relates in general to improvements in the art of controlling the operation of fluid pumping systems or the like, and relates more specifically to improvements in the construction and operation of automatic regulators for controlling the speed of internal combustion engines or similar motors while driving air compressors or similar pumping apparatus. An object of the invention is to provide an improved automatic compressor regulator, which is simple in construction and efficient in operation. It has heretofore been common practice to utilize fluid pumping systems of the type comprising an internal combustion engine driven air compressor equipped with an automatic unloading device and slow down device for controlling the minimum engine speed, and also provided with a governor for controlling the maximum speed of the engine. With such a system, when the compressor is unloaded the slow down device automatically reduces the engine speed to a definite minimum, whereas when the compressor again becomes active the speed governor functions to restore the engine speed to its predetermined maximum; but no proper provision is made for regulating or varying the engine speed according to the actual demand for compressed air. If the demand for air is light, the speed of the engine is subject to rather frequent and extreme variations from minimum when idling to maximum when pumping, and vice versa, and the operation of an internal combustion engine under such conditions is far from being efficient or economical. While it has heretofore been proposed to obviate this difficulty by causing variations in the demand for air to vary the engine speed through the speed governor, this type of regulation is objectionable because it is not direct and independent of the other controls. Claim: In a regulating system for an internal combustion engine driven air compressor having an air receiver, a carburetor for supplying fuel to the engine, a speed governor for controlling the flow of fuel to the engine from said carburetor, an unloading device for the compressor, a fuel control valve interposed between the carburetor and the engine, and mechanism for controlling the opening of said valve directly in accordance with variations in receiver pressure and entirely independently of said speed governor and of said unloading device.