US1368945A

US1368945A - Plastic composition used as a power-transmitting element in fluidclutches

Info

Publication number: US1368945A
Application number: US136234A
Authority: US
Inventors: Lake David
Original assignee: Fulton Foundry & Machine Compa
Current assignee: Fulton Foundry & Machine Co; Fulton Foundry & Machine Compa
Priority date: 1916-06-15
Filing date: 1916-12-11
Publication date: 1921-02-15
Anticipated expiration: 1938-02-15

Description

D. LAKE. I

PLASTIC COMPOSITION USED AS A POWER TRANSMITTING ELEMENT IN FLUID CLUTCHES.

APPLICATION FILED DEC.II. I916. RENEWED JUNE 18. 1918.

1,368,945. Patented Feb. 15, 1921.

DAVID LAKE,

OF NORRISTOWN, PENNSYLVANIA.

ASSIGN'OR, BY MESNE 'Assren- MEN'IS, .TO THE FULTON FOUNDRY MACHINE COMPANY, OF CLEVELAND,

OHIO, A CORPORATION OF OHIO.

PLASTIC COMPOSITION USED AS A POWER-TRANSMITTING ELEMENT IN FLUID- CLUTCHES.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Original application filed June 15, 1916, Serial No. 103,912. Divided and this application filed December 11, 1916, Serial No. 136,234. Renewed June 18, 1918. Serial No. 240,688.

power transmitting member in fluid clutches so that the motion ofcthe driving element will be transmitted proportionately to the driven element according to the penetration of the driven element into the plastic material carried by the driving element.

In the accompanying drawing Figure 1, is a sectional view on the line 1--1, Fig. 2, showing a fluid clutch in which my improved plastic fluid member is used; and

Fig. 2, is a sectional Fig. 1.

y improved plastic fluid member is a comparatively thick, dense mass consisting of graphite, glycerin and asbestos fiber in about the proportion of two parts of graphite, two parts asbestos fiber and one part glycerin. This mass is of such a consistency that when compacted it will have suflicient solidity to resist movement of one element in respect to another, but when it is not comacted it will allow one element to move free of the other element and, consequently, by regulating the density of the materia the transmission of power from one element to another can be accurately regulated. This compound is especially adapted for use in a fluid clutch such as that described in my pending application Serial No. 103,912, filed June 15th, 1916.

Referring to the drawing, 2 is the casing which, in the present instance, forms the driving element, and located within this casing is a driven element 3. In this driven element is a series of plungers 4 mounted in radiating grooves and means are provided for projecting the plungers into the space view on the line 2-2,

between the driving and the driven elements. Inthe present instance, on the inside of the casing 2 is a series of abutments 5 and 6, and some of these abutments (5) are at the base of the annular recess in the driving element, while the abutments 6 are at the sides of the recess, as shown by dotted lines. The plastic fluid member is indicated at 7 and has a consistency as above set forth. The plungers are less in diameter than the width of the to the full extent, as illustrated in the drawannular recess, but when they are projected ing, then the entire power is transmitted from the driving element, the casing 2, to the driven element 3, through the plastic material and the plungers, but, if the plunger's are slightly retracted so as to allow the fluid element to pass the plungers more freely, then the driven element will be driven at a slower speed than the driving element, and the speed of the driven element will decrease as the plunger is retracted until finally, when the plunger is fully retracted, no motion will be imparted to the driven element.

It will be noticed that when the plungers are in their full projected position they do not touch the casing and, therefore, motion is transmitted entirely through this dense mass of plastic material. Tests have shown that there is no slip between the driving and the driven elements when the plungers are fully projected into the dense mass of plastic material under normal driving strains. This is due to the fact that the driving element is rotated at a speed suificient to cause the plastic fluid mass to pack against the inner periphery of the casing and is caused to turn with the casing due to the projecting abutments, and when the plungers are forced into the dense portions of the mass the plungers and the driven element, must turn with the driving element. The proportions of the composition may be slightly modified without departing rom the essential features of the invention, but the plastic fluid mass must be such that it will become so dense, due to centrifugal action, that a plungel, or its equivalent, projected into the mass will rotate therewith.

I claim:

1. A plastic composition'used as a power transmitting member for a fluid clutch, said composition consistin of graphite as a base 5 with glycerin and a brous materiel added thereto to form a plastic fluid mass of .such a consistency that when compacted 'it will have sufiicient solidit to resist the movemeut'ofone member arclu'tch "in'mspectto DAVID LAKE.