Patent No. 426965A: Beer-Filtering Apparatus

Today in 1890, US Patent 426965 A was issued, an invention of Phillip Seibel, for his “Beer-Filtering Apparatus.” There’s no Abstract, although in the description it includes this summary:

This filtering apparatus is intended especially for beer or other liquids liable to foam, and has means for the removal of the foam into a settling-chamber, from which the liquid is withdrawn as it subsides. The apparatus is composed of two or more similar filters connected with the same system of circulating pipes.


Patent No. 2281457A: Aeration Of Fermenting Wort In The Manufacture Of Yeast

Today in 1942, US Patent 2281457 A was issued, an invention of Sven Olof Rosenqvist, for his “Aeration of Fermenting Wort in the Manufacture of Yeast.” There’s no Abstract, although in the description it includes this summary:

In the manufacture of pressed yeast it is known to blow air into the worts to increase the yeast yields; As a rule the fermentations are now performed with the use of the running-in method, the level of the wort in the vat being considerably lower at the commencement than at the termination of the fermentation. As a rule, it is desired during the start and at the termination of the process to supply less air to the wort than during the main portion of the fermentation. During the main portion of the fermentation it may also be of interest sometimes to be able to supply air quantities of different magnitudes.

Generally, one or more compressors of the same or of different types would operate on a ‘common pressure conduit branched off to the various vats’. By employing large compressor units, the air of which would be distributed to a plurality of vats, a rather low installation cost would be obtained for the compressor system. At the same time, however, the disadvantage would be incurred that the pressure on the air piping always would have to be maintained at a value corresponding to the highest back pressure prevailing in any vat.

Air taken out from the pipe system for a vat with a lower back pressure thus would have to be reduced by a valve from the higher to the lower pressure, which obviously would involve losses of energy.

With large compressor units, the losses in idle running would also be considerable at a low load.

Any control of the air quantity for the various fermentation vats could only take place manually with the arrangements described and with loss of energy. A control of the air quantity to a fermentation vat from the common conduit would entail disturbances in the air supply to the remaining vats and in order to limit such disturbances the pressure above atmospheric in the main conduit would have to be maintained at. an unnecessary high value. The arrangements as hitherto used consequently could not, owing to the fact that the control would be less accurate or too expensive, ensure the proper air supply to each of the fermentation processes proceeding in the various fermentation vats at an energy cost as low as possible. By reason of the fact that the supply of the quantities of air undertaken at the fermentations could not be properly adapted with respect to the process otherwise carried out in connection with these fermentations, the lowest cost for the aeration work, the best yield of the raw materials and the best quality of the finished product consequently could not be obtained.

The present invention refers to an arrangement for the supply of air to fermenting wort in the manufacture of pressed yeast, in the use ‘of which the above described disadvantages are avoided.

The arrangement according to the invention is principally distinguished by a compressor apparatus adapted to be controlled with respect to the delivery of air, the pressure conduit of which apparatus is connected to the plant of fermentation vats, and by an arrangement with a continuously driven member adapted to control the intensity of aeration in accordance with a previously determined aeration scheme, and which may actuate the air delivery of the compressor apparatus by influencing the compressor apparatus itself, its suction or pressure conduit or its driving machinery, or two or more of these arrangements, and which is so arranged as to adjust the compressor apparatus automatically and in accordance with an aeration scheme determined beforehand, to deliver air in a quantity and at a pressure required by the scheme at any moment. Preferably, a measuring device is provided to indicate the amount of air passing on its way to the fermentation vat, said measuring device being adapted to give impulses to the controlling doling device. According to an embodiment of the invention, the controlling doling device is adapted directly or indirectly to actuate a device, in ,order, in the case of double acting compressors, to convey a portion of the air to that part of the compressor which operates at a pressure below atmospheric. According to a further embodiment, a measuring device for the air in the inlet or outlet of the compressor “is arranged to transmit impulses for the control of the number of revolutions of the driving engine of the compressor.

Also. a measuring device for the air may be arranged to effect throttling in the inlet or outlet of the compressor so as to control the quantity of air in this way. If a compressor be used. a turbo-compressor adapted to be controlled with respect to the number of revolutions thereof is preferably made use of.


Patent No. 726427A: Beer Filter

Today in 1903, US Patent 726427 A was issued, an invention of William Haussermann, for his “Beer Filter.” There’s no Abstract, although in the description it includes this summary:

This invention relates to improvements in filters, and particularly beer-filters.

The object of the invention is to provide a beer-filter which is simple of construction, comparatively inexpensive of production, efficient in operation, and adapted to be readily and conveniently cleansed of the retained impurities.


Patent No. 698184A: Method Of Refining, Aging, Mellowing, And Purifying Alcoholic Liquors

Today in 1902, US Patent 698184 A was issued, an invention of James Franklin Duffy, for his “Method of Refining, Aging, Mellowing, and Purifying Alcoholic Liquors.” Although it’s not strictly speaking, a beer patent, it is somewhat related, and it was too interesting not to include. There’s no Abstract, although in the description it includes this summary:

My invention relates to a certain improved method or process for the treatment of liquors in the same particulars as is usually accomplished through a considerable period by the ordinary aging process.

Under the term liquor as used herein I include all alcoholic or spirituous fluids, either distilled or fermented; and it is the purpose of the invention to purify said liquors,to eliminate all injurious qualities therefrom, and to supply the ripe, pure, and mellow qualities which time alone has done heretofore.

The invention consists in the treatment of the liquor by means of the various steps of the process, all of which will appear from the description and be clearly pointed out in the claims.


Patent No. 581206A: Apparatus For Aerating Liquids

Today in 1897, US Patent 581206 A was issued, an invention of Peter Cooper Hewitt, for his “Apparatus for Aerating Liquids.” There’s no Abstract, although in the description it includes this summary:

My invention is applicable to aerating waters, beer, and other liquids.

In the manufacture of beer by some methods the carbonic acid in the beer is extracted and it becomes necessary to replace the gas thus taken out.

The object of my invention is to thoroughly aerate the beer while it is in the form of a highly-attenuated film.

My invention consists in a centrifugal machine of peculiar construction adapted to reduce the liquid to the form of an extremely thin film, the centrifugal machine being operated in a closed vessel suitable for the required pressure.


Patent No. 3085945A: Malting Process

Today in 1963, US Patent 3085945 A was issued, an invention of Wayne W. Luchsinger and John G. Fleckenstein, assigned to the Kurth Malting Company, for their “Malting Process.” There’s no Abstract, although in the description it includes this summary:

According to the present invention there is provided a novel malting process which gives greatly increased malt recoveries and with other benefits which will be disclosed hereinafter. There is also provided a novel malt produced having substantially retarded, and/or essentially free of rootlets. This novel malting process broadly comprises acidulating a cereal grain, as well as contacting the cereal grain with a growth-stimulating amount of gibberellic acid, in the period from initial steeping to the growth or germination stage prior to any significant growth or germination, viz, usually within about 6 hours, and as much as 1 day, or slightly longer, after steep out, and thereafter completing the germination.

By acidulating is meant applying an acidic substance to the grain, such as by spraying or immersing the grain in an aqueous solution of the acidic substance to inhibit growth. Thus, the acidic substance can be incorporated in the steep water at any stage of the steeping operation or it can be applied to the grain at steep out or thereafter and before any significant growth or germination has resulted, viz, within about 6 hours and as much as 1 day or slightly longer after steep out. However, malt recoveries are generally progressively lowered as the acidulation treatment is delayed after steep out. Nevertheless, the malt recoveries generally obtained after such tardy or deferred acidulation are higher than without such treatment.

Acidulation without the addition of gibberellic acid to the grain inhibits growth but the grain is not converted to usable malt, especially at low pH values below 3.8. Gibberellic acid alone without acidulation promotes growth but losses due to respiration and rootlets are excessive.

Surprisingly, the combination of acidulation and gib- 4 untreated malt and, in fact, almost reaches the ultimate object of going from grain to malt without loss. The 1% loss in the aciduiated-gibberellic acid treated malt due to steeping and abrasion is presently considered unavoidable but negligible compared to the reduction in other losses.

The avoidance of wasteful rootlet formation in the process of this invention is particularly significant since the germinating grain (barley) is more readily stirred and because matting is avoided. The barley thus requires less volume during germination so that more barley can be malted with existing equipment than when rootlet growth takes place. For example, instead of germinating 250i) bushels in a bed, from 3500 to 4000 bushels can be germinated. The increased productive capacity leads to lower costs. Furthermore, the essentially rootlet-free malt produced according to this invention requires much less storage volume and transportation space than conventional malt with rootlets. In addition, this malt has a higher bushel weight than conventional malt after the rootlets are removed.

The reduction in loss due to respiration is also highly important, not only because of the waste of the kernel constituents which is avoided, but also because of the reduced amount of heat developed in respiration. This heat must be removed to maintain the grain at a proper malting temperature. Since less heat is evolved there is less to remove. Turning of the malt to avoid overheating thus can be reduced. There is also less expense involved in refrigeration since less cool air is needed to maintain the malting temperature.


Historic Beer Birthday: William Cullen

Today is the birthday of William Cullen (April 15, 1710-February 5, 1790). He “was a Scottish physician, chemist and agriculturalist, and one of the most important professors at the Edinburgh Medical School, during its hay-day as the leading center of medical education in the English-speaking world.

Cullen was also a central figure in the Scottish Enlightenment. He was David Hume’s physician and friend, and on intimate terms with Adam Smith, Lord Kames (with whom he discussed theoretical and practical aspects of husbandry), Joseph Black, John Millar, and Adam Ferguson, among others.

He was President of the Royal College of Physicians and Surgeons of Glasgow (1746–47), President of the Royal College of Physicians of Edinburgh (1773–1775) and First Physician to the King in Scotland (1773–1790). He was also, incidentally, one of the prime movers in obtaining a royal charter for the Philosophical Society of Edinburgh, resulting in the formation of the Royal Society of Edinburgh in 1783.”

Cullen extended the subject of chemistry beyond medicine by connecting it to many “arts” including agriculture, bleaching, brewing, mining, and the manufacture of vinegar and alkalies. In brewing, it was the very important need for cooling using artificial refrigeration where William Cullen at the University of Glasgow in 1748 made his impact, making advances crucial to the development of refrigeration for the brewing industry when he began studying the cooling effects of liquids evaporating in a vacuum, the process by which we cool foods today. He even demonstrated artificial refrigeration for the first time in 1748.


In the Brussels Journal, in a multi-part history of beer, Cullen’s contributions are acknowledged and explained:

The principle of vacuum refrigerators is based on the fact that water in a sealed container can be made to boil if the pressure is reduced (the “boiling point” of 100 degrees Celsius refers to the situation when the external pressure equals one atmosphere; water can be made to boil at lower temperatures on a mountain top). The heat necessary for evaporation is taken from the water itself. Reducing the pressure further lowers the temperature until freezing-point is reached and ice is formed. The Scottish scholar and chemist William Cullen (1710-1790) gave one of the first documented public demonstrations of artificial refrigeration, and the United States inventor Oliver Evans (1755-1819) designed, but did not build, a refrigeration machine which ran on vapor in 1805. I. Hornsey writes in his history of beer and brewing:

“The earliest machine of this type was constructed in 1755, by Dr William Cullen, who produced the vacuum necessary purely by means of a pump. Then, in 1810, Sir John Leslie combined a vessel containing a strong sulphuric acid solution along with the air pump, the acid acting as an absorbent for water vapour in the air. This principle was taken up and elaborated upon by E.C. Carré, who in 1860 invented a machine that used ammonia as the volatile liquid instead of water….The first compression machine was manufactured by John Hague in 1834, from designs by the inventor, Jacob Perkins, who took out the original patents, and recommended that ether was used as the volatile agent. Although Hague’s machine can be regarded as the archetype for all ‘modern’ refrigerators, it never really got past the development stage, and it was left to the Australian, James Harrison, of Geelong, Victoria, to finalise the practicalities and produce a working version, which he did in 1856. By 1859, Harrison’s equipment was being manufactured commercially in New South Wales, and the first of them (which used ether as the refrigerating agent) came to Britain in 1861.”


Although the first inventor of a practical refrigerator was Oliver Evans in 1805, Cullen invented the process in 1748 which allowed the technology to be further developed. After his public demonstration of the refrigeration effects of evaporative cooling, he described the phenomenon in “Of the Cold Produced by Evaporating Fluids and of Some Other Means of Producing Cold” (Essays and Observations, Physical and Literary, vol. 2 [1756]).


Patent No. 34943A: Beer Measure

Today in 1862, US Patent 34943 A was issued, an invention of Charles Chinnock, for his “Beer Measure.” There’s no Abstract, although in the description it includes this summary:

I have invented a new and improved can and measure for liquids liable to froth or foam when drawn or measured and also to separate the froth or foam from the liquid when pouring into other vessel or vessels.


Patent No. 918096A: Apparatus For Separating And Washing Yeast

Today in 1909, US Patent 918096 A was issued, an invention of Otto Selg and Carl Guntrum, assigned to Selg Brewery Apparatus Co., for their “Apparatus For Separating and Washing Yeast.” There’s no Abstract, although in the description it includes this summary:

This invention relates to improved means for washing yeast and separating the lighter particles and impure matter from the pure heavy particles in a quick, simple and efficient manner.


Patent No. 988899A: Apparatus For Cleaning Beer-Pipes

Today in 191a, US Patent 988899 A was issued, an invention of Theodore Diem and John J. Ryan, for their “Apparatus for Cleaning Beer-Pipes.” There’s no Abstract, although in the description it includes this summary:

Our invention relates to improvements in apparatus for cleaning beer pipes and has for its object the provision of such an apparatus which shall be of simple construction and eflicient in operation.