35:
148:
50:, is a common mechanical design component used to transfer or synchronize rotational force in a machine. A jackshaft is often just a short stub with supporting bearings on the ends and two pulleys, gears, or cranks attached to it. In general, a jackshaft is any shaft that is used as an intermediary transmitting
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was generally applied to the final intermediate shaft in the drive train, either a chain driven shaft driving pinions that directly engaged teeth on the inside of the rims of the drive wheels, or the output shaft of the transmission/differential that is linked by chain to the drive wheels.
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always appears in quotes. Another 1872 author wrote: "Gear wheels are used in
England to transmit the power of the engine to what is usually called the jack shaft." By 1892, the quotes were gone, but the use remained the same.
187:
for speed control. In 1872, this definition was given: "The term countershaft is applied to all shafts driven from the main line when placed at or near the machines to be driven ..."
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inside the jackshaft was used to select one of several gear ratios on the chain drive to the driven axle. Later railroad jackshafts were generally connected to the driving wheels using
107:, linked through a jackshaft. Clutches on the jackshaft pulleys allowed any or all of the dynamos to be driven by either or both of the engines. With the advent of
379:, Vol I, No. 3 (July, Aug. and Sept. 1828); page 324. This reads like a patent application, there is no record of a corresponding patent.
413:
408:
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Modern jackshafts and countershafts are often hidden inside large machinery as components of the larger overall device.
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in the context of railroad equipment was in an 1890 patent application by Samuel Mower. In his electric-motor driven
390:
Principles of
Mechanism Designed for the Use of Students in the Universities and for Engineering Students Generally
299:
Vol. II, No. 9 (July 1892); pages 219-224, see particularly figure 1 and the discussion of it on pages 223-224.
377:
The
American Journal of Improvements in the Useful Arts and Mirror of the Patent Office in the United States
76:
183:
through additional belts. The countershaft and the lathe spindle each carried cones of different-diameter
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28:
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In farm equipment, a spinning output shaft at the rear of the vehicle is commonly referred to as the
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The pulleys on the jackshafts of mills or power plants were frequently connected to the shaft with
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388:
Robert Willis, Part the Third, Chapter II -- To Alter the
Velocity Ratio by Determinate Changes,
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is somewhat older. In 1828, the term was used to refer to an intermediate horizontal shaft in a
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through bevel gears. An 1841 textbook used the term to refer to a short shaft driven by a
99:. For example, in the 1890s, the generating room of the Virginia Hotel in Chicago had two
200:
124:
100:
402:
180:
147:
127:, the motor was geared to a jackshaft mounted between the side frames. A sliding
310:
Rope-Driving: A treatise on the transmission of power by means of fibrous ropes
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84:
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80:
51:
362:
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17:
312:, Wiley, New York, 1895; pages 42-43. Fig. 21 shows part of the jack-shaft.
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or PTO, and the power-transfer shaft connected to it is commonly called a
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A PTO shaft or jackshaft with a protective shield to prevent entanglement.
38:
A two-pulley jackshaft redirecting belt power from horizontal to vertical.
254:
Holyoke Warter Power Co., Experiments with Gears, Belts and Draft Tubes,
222:
132:
241:
James
Emerson, Report of Water-Wheel Tests at Lowell and Other Places,
184:
104:
96:
375:
James
Hindman and William Hindman, Improvement in the Grist Mill,
146:
33:
258:, Weaver Shipman and Co., Springfield, Mass., 1880; pages 73-76.
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appear to involve shafts that were intermediate between
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of 19th century mills. In these early sources from
245:, Vol. LXIII, No. 3 (March, 1872); pages 177-178.
274:, Vol. LXIV, No. 5 (Nov. 1872); pages 305-319,
266:
264:
8:
360:Samuel E. Mower, Electric-Motor Mechanism,
338:, Vol I, No. 36 (Nov. 10, 1899); page 565.
392:, John W. Parker, London, 1841; page 433.
351:Vol II, No. 8 (Feb 1, 1902) ;pages 55-56.
270:Coleman Sellers, Transmission of Motion,
325:, Vol. 5, No. 2 (Oct. 11, 1899); page 6.
54:from a driving shaft to a driven shaft.
234:
7:
334:Some New American Steam Carriages,
349:Cycle and Automobile Trade Journal
119:One of the first uses of the term
27:For the locomotive component, see
25:
272:Journal of the Franklin Institute
243:Journal of the Franklin Institute
87:mills in 1872 and 1880, the term
256:Holyoke Hydrodynamic Experiments
163:driven through gearing by the
1:
179:and driving the spindle of a
321:The Darling Steam Carriage,
293:Drive for Power Transmission
67:The oldest uses of the term
208:, but is also a jackshaft.
435:
26:
347:The Grout Steam Tonneau,
278:is defined on page 314,
77:stationary steam engines
366:, issued Apr. 21, 1891.
152:
137:jackshaft (locomotive)
39:
29:Jackshaft (locomotive)
414:History of technology
409:Industrial Revolution
336:The Motor Car Journal
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37:
109:chain-drive vehicles
363:U.S. patent 450,970
297:Cassier's Magazine
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323:The Horseless Age
308:John J. Flather,
291:Robert Grimshaw,
16:(Redirected from
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167:and driving the
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101:Corliss engines
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419:Shaft drives
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282:on page 316.
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276:countershaft
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157:countershaft
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143:Countershaft
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89:"jack shaft"
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73:water wheels
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48:countershaft
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18:Countershaft
218:Drive shaft
191:Modern uses
111:, the term
85:New England
81:line shafts
403:Categories
280:jack shaft
229:References
177:line shaft
169:millstones
165:waterwheel
129:dog clutch
206:PTO shaft
175:from the
161:gristmill
155:The term
133:side rods
121:jackshaft
113:jackshaft
103:and five
69:jackshaft
63:Jackshaft
44:jackshaft
223:Layshaft
212:See also
97:clutches
79:and the
185:pulleys
105:dynamos
58:History
181:lathe
135:(see
52:power
173:belt
75:or
405::
295:,
263:^
42:A
31:.
20:)
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