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Publication numberUS486196 A
Publication typeGrant
Publication dateNov 15, 1892
Filing dateNov 17, 1891
Publication numberUS 486196 A, US 486196A, US-A-486196, US486196 A, US486196A
InventorsOptarles Henry Ridsdale
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Optarles henry ridsdale
US 486196 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)





SPECIFICATION forming part of Letters Patent No. 486,196, dated November 15,1892.

Application filed November 17, 1891. Serial No. 412,137. (No specimens.)

To all whom it may concern:

Be it known that we, CHARLES HENRY RIDSDALE, analytical chemist, of The Grange, Hutton, Guisborough, and ALFRED J ONES, rolling-mill manager, of OlevelandView, Newport Hill, Middlesborough, both. in the county of York, in the Kingdom of England, respectively, subjects of the Queen of Great Britain, have invented certain new and useful Improvements in Lubricants, of which the following is a specification.

The object of this invention is a lubricant especially suitable for heavy machinery, such as the necks of rolls in iron and steel rolling mills, heavy engine-shafts, axles, &c. Hitherto it has been usual to apply the lubricant by some such method as smearing it on (which entails great waste) or inclosing it in bags or some outer covering permeable by the lubricant, (which necessitates the use of lubricants of low melting-points and viscosity,) in consequence of which great waste ensues, and also the bearings are less perfectly protected from wear than by a more solid lubricant.

We make the lubricant in solid form, as blocks, bars, slabs, &c., suitable to the requirements of the machinery, or as a more or less solid grease, according to consistency required, where preferable, and in order to obtain a lubricant which will resist the effects of high temperature and water, singly or combined,

without undue wear we use a hard insoluble.

alkaline-earth soap, and combine therewith oils, ordinary soap as met with in the market, and a solid mineral lubricating material, as mica, plumbago, or sulphur, or a mixture of these.

For the harder form of lubricant we prefer a mixture substantially as follows: lime hydrate, three per cent; tallow, twenty-one per cent; total, twenty-four per cent; ordinary soap, six per cent; suet, tallow, or other saponifiable oil or grease, fifty-four per cent. fine plumbago, sixteen per cent.

For a softer kind of lubricant, the following is a suitable formula: lime hydrate, two per cent.; tallow, fourteen per cent.; limesoap, sixteen per cent; rendered suet or tallow, thirty-one per cent; sulphur, nine per cent; plumbago, fourteen per cent; heavy 5o petroleum-oil, thirty per cent.

For some kinds of work we prefer simply a mixture of hard insoluble alkaline-earth soap and sulphur in various proportions.

We would have it understood that the above 5 5 proportions are not to be taken as binding, as considerable variation may be made therein.

On preparing the lubricants it is preferable to mix the oil or grease or equivalent fatty matter to be saponified with a greater or less quantity of the ordinary soap, as this induces the saponification to commence. The alkaline earth, 850., is then added either dry or made up into a sirup with a small quantity of water, and heat is then applied and all the I uncombined water driven off. In this way the lime-soap is formed in the mass and intimately mixed much more quickly than if formed separately and added, the ordinary soap greatly aiding the saponification. The remainder of the ingredients is then added and the mass preferably cast into blocks or bars and allowed to cool.

In conclusion, we are well aware that a mixture of insoluble soap and plumbago has been proposed for this purpose; but such mixture. is of a pulverulent or soft nature, and the-in soluble soap has been added to the plumbago to assist in causing it to adhere to the surface and is in the proportion of about thirtythree per cent. of the mass. In our case we add, as a rule, only from two to five per cent. of insoluble soap, and this is mixed with ordinary potash or soda soap, as sold for washing purposes, preferably soda-soap, to harden it. We are further aware that lime in dry powder has been added to grease and other material to correct acidity; but in this case it is only a simple mixture, and an alkalineearth carbonate, which under no circumo stances will make a soap, is generally mentioned as an equivalent, and, indeed, for this purpose mechanical admixture to cure acidity will do just as well; but

We declare that what we claim is-= 5 1. A lubricant consisting of the combination of hard alkalineearth soap, ordinary soap, fatty matters containing a large amount of stearine, and a solid lubricating material, In testimony whereof we have signed our the whole forming a somewhat-greasy body names to this specification in the presence of IO capable of just being scraped by the nail and two subscribing Witnesses.

not fusing under the boiling-point of Water. CHARLES HENRY RIDSDALE. 5 2. A lubricant consisting of the c0mbina- ALFRED JONES.

tion of an alkaline earth and fatty matters Witnesses:

consisting largely of stearine, ordinary soap, DAVID DAVIES,

and sulphur, substantially as described. PERCY A. G. BROADBRIDGE.

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US7090674Nov 3, 2003Aug 15, 2006Spinal, LlcBone fixation system with low profile fastener
US20050096653 *Nov 3, 2003May 5, 2005Doubler Robert L.Bone fixation system with low profile fastener
USRE42867 *May 9, 2008Oct 25, 2011Spinal, LlcBone fixation system with low profile fastener
Cooperative ClassificationC10M2201/043