US516489A - John hunt - Google Patents

Description

I .HUNT. PROT R PQR SHAPTING.

Ptented Mar. 1s, 1894.

. IHR

UNITED STATES PATENT OFFICE.

JOHN HUNT, OF CARLTON, VICTORIA.

PROTECTOR FOR SHAFTING.

A SPECIFICATION forming part of Letters Patent No. 516,489, dated March 13, 1894.

Application iiled August 14, 1893. Serial No.483,058. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN HUNT, machinist, a subject of the Queen of Great Britain, and a resident of Nicholson Street, Carlton, in the Colony of Victoria, have invented a certain new and Improved Thimble or Cylindrical Protector for Shafting or Spindles of Machinery, of which the following is a speciication.

This invention has been devised for the purpose of affording the public with a protector against wear and tear ot shafting or spindles in machinery generally and applies most particularly to the underground pulley spindles of cable-tramways.

It has been found in the past'that the constant friction and action of dust, Water and grit wears away the journals or revolving spindles of underground cable-tramway'pulleys, while in ordinary machinery the Wear and tear on spindles particularly those of a small dialneter is found to be considerable. Now my invention has been devised to obviate the wearing away of such spindles and consists in the employment of a closely fitting collared thimble or cylinder placed over the spindle. The protector is constructed in the form of a cylinder terminating at one end in a collar, or flange, of increased diameter,which is intended to butt against the hub of the wheel. This collar or fiange is provided with oneor more bites or indents in its periphery, said bites or indents being for the purpose `of fitting to and engaging with plugs or pins of metal set on the face of the said hub of the wheel.

In order that my invention may be the bet,- ter understood reference may be made to the accompanying drawings in which- Figure 1 shows a view (partly in section) of my new or improved thimble or cylindrical protector attached on and to the spindle and hub of a wheel. Fig. 2 isa front elevation of my thimble or cylindrical protector. Fig. 3 is a view showing the plugs or teeth on hub; Fig. 4 an alternative form of construction of the collar or liange-while Fig. 5 is an alternative form of construction of both the shaft or spindle and the thimble or cylindrical protector.

In the drawings A is the thimble or protector constructed (as aforesaid) in the form of a cylinder, B being the collar or flange at end of same in which bites or indents B are provided. C is the spindle on which the hub D is centered, E being the spokes of the pulley wheel or other revolving object. D are plugs or teeth of metal which fit into the indentations B in such a manner as to cause the collar or flange B to rotate synchronously with the hub D.7

Fig. 4 illustrates an alternative construction of the flange B2 from which it will be seen that the plugs D and indentations B may be dispensed with, and in their place the ange or collar B2 may be constructed of a square form, in which case the end face of the hub D will have provided upon it an indented square box to receive and rotate the square flange B2. I have shown this particular figure in order to illustrate an4 alternative form of construction of the flange Bi but in practice the construction of the said Iiange B2 may be varied to any shape or design so that when fitted to the face of the hub D it maybe rotated synchronously by the movement of the said hub D. If preferred the shaft or spindle C may be of a square section or otherwise shaped, as at Fig. 5 from which illustration it will be seen that a flat G is provided or cut on the shaft or spindle C, the cylindrical protector being shaped so as to meet this alternate construction.

The modus operandi of my invention is as followsz-Presume that my protector is to be employed in connection with revolving underground pulleys of cable tramways. Preferably, but not arbitrarily, I employ the thimbles or protectors in the arrangement shown in Fig. lof the drawings, and it will be seen from a glance at this figure that when the spoke E, hub D and shaft C revolve, the thimbles or protectors A will revolve therewith in the bearings provided for the purpose, the rotatory persuasion being communicated from the pins or plugs B to the thimbles or protectors A and it will be seen that all Wear and tear usually borne by the spindle C will be inflicted on the thimbles or protectors A These latter are easily removable and replaceable so that an attendant may in a short space of time replace any worn thimble or protector with a fresh one in IOO a few minutes, and thus obviate the necessity of removing the whole pulley or Wheel and inserting therein a new spindle or shaft at a considerableloss of timeand money. Thebearings must of course be of a sufciently large diameter to admit the increased diameter ot' the protector and I prefer to construct the bearings of a harder metal than the protector so that the removable protector may take the et'- fect of Wear and tear. The rotatory plugsD Would not be required were a construction similar to that shown on Figs. 4 and 5 employed, as the rotation of the shaft C would carry With it, by reason of the formation G, the thimble or protector A, or the hub D would carry with it, when rotated the square flange 132.

I would here point out that my invention is not alone applicable to the spindles ot' underground cable'trarnway pulleys, as a glance at the drawings will illustrate to the practiced mind that my protector can be employed to any rotating shafting. I prefer that thc di- `movable thimbles slipped over the journals and each having a flange and an interlocking connection between each sleeve-llange and the end ot the hub to cause the sleeve to rotate with the hub, substantially as specified.

Signed this lst day of July, 1893.

J Oil-IN HUNT.

Vitnesses:

A. O. SAoHsE,

O'. E., Jlfelbotmnc, A. I-IARKER.

Clerk, llfelbmwnc.

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