US297407A - Jenkin - Google Patents

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US297407A
US297407A US297407DA US297407A US 297407 A US297407 A US 297407A US 297407D A US297407D A US 297407DA US 297407 A US297407 A US 297407A
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
    • F16H13/10—Means for influencing the pressure between the members
    • F16H13/14—Means for influencing the pressure between the members for automatically varying the pressure mechanically
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19619—Displaceable elements

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  • My invention has tor its object the diminution ol" the loss by friction in transmitting power by gearing, and in many cases subsidiary advantages would followits adoption.
  • iVhen toothed wheels are employed, unnecessary friction takes place, chieliy at the surfaces ofthe teeth.
  • Noise and liability 'ot' breakage are further disadvantages of toothed gearing.
  • W'hen belting is employed,unnecessary friction takes place, chietly at the bearings.
  • FIG. 1 is a plan view, partly in section, and Fig. 1L a view partly in elevation and partly in section, showing one form of nestgearing.
  • Fig. 2 is a plan, and Fig. 2 a View partly in elevation and partly :in section, of a modiiication.
  • Fig. 3 is a view partly in elevation and partly in section of another modiiication.
  • Fig. L.t is a plan view, partly in section, and Fig. 4 a view partly in elevation and partly in section, of another.modification.
  • Fig. 2 is a plan, and Fig. 2 a View partly in elevation and partly :in section, of a modiiication.
  • Fig. 3 is a view partly in elevation and partly in section of another modiiication.
  • FIG. 5 is a plan view, partly in section, and Fig. 5taview partly in elevation and partly in section, of another modification.
  • a plan view, partly in section, and Fig. 6 a view partly in side elevation and partly in section, of another modification.
  • Fig. 7 is a plan and Fig. 7 a view partly in elevation and partly in section, of another inodiiication.
  • Fig. Si s a plan view, partly in section, and Fig. 8 a view partly in elevation and partly in sectipn, of another modification.
  • Fig. 9 is a plan view, partly in section, and Fig. 9 a view partly in elevation and partly in section, of a modified forni of gearing.
  • Fig. 10 is a plan, and Fig.
  • Fig. 10 a view partly in elevation and partly in section ot' another modification.
  • Fig. 11 is a view partly in elevation and partly in section of another modification, Fig. 12, a similar view of another n1odiiication; Fig. 13, a similar view of another inodiiication.
  • Fig. 14 is a view in elevation of another modification; Fig. 15, a similar view of another modification.
  • Fig. 16 is a view partly in elevation and partly in section of another modification; Fig. 17, a like View of another niodilication; Fig. 17a, alike view of another modification; Fig. 18, a like view of another modification; Fig. 19, a like View of another modification.
  • Fig. 20 is a plan, and Fig.
  • Fig. 20u a view partly in elevation and partly in section, of another modification.
  • Fig. 21 is a plan view of another modification.
  • Fig. 22 is aview partly inside elevation and partly in section of another modifica tion; and
  • Fig. 23 shows a compressible coiled steel roller.
  • the other must be free to move relatively to this shaft in the manner described.
  • the surface velocities of the outside of A and the inside of D are the same, and their angular-velocity ratio is the inverse ratio of the radii of these two surfaces.
  • the smaller roller A may be outside B and C, as shown in Fig. 2, and is then pressed directly against the inside of D.
  • the rollers A, B, and C may be equal or unequal. If they are unequal, we shall have four different angular-velocities all inversely proportional to the several radii.
  • the bearings allow absolute freedom to the centers A, B, and C to adjust themselves on the line F H relatively to that of D; or, what would come to the same 1 thing, absolute freedom is given to three of the centers to adjust themselves relatively to the fourth.
  • the normal pressure by D on the inner rollers and the reciprocal normal pressure by the inner rollers on D and the normal pressure between the inner rollers themselves cause no pressure on any bearing.
  • This normal pressure may therefore be of any desired or necessary amount to secure adhesion without causing any injurious friction.
  • the rollersor rings must be so strong as not to be sensibly deformed by the pressure.
  • the necessary tightening may be effected in three ways.
  • stout coil or helix of steel capable of compression as to diameter by elongation of the coil in the direction of the axis.
  • This compression as to diameter is compatible with the retention of a truly cylindrical form.
  • the cylindrical surfaces of A, B, C, and D will all be such as are generated by a straight line revolving parallel to the axis of each roller.
  • Figs. 2, 3 show one mode of carrying out this method.
  • the spring is fast at one end to the shaft and in a slot at the other end.
  • Fig. l is a sectional elevation of the gear shown in plan in Fig. l.
  • a small projection, m and a is formed on B and C.
  • a corresponding hollow is then formed in the ring of D, so that the straight lines on B an d C may bear against a straight line in D.
  • the endpressure is shown as produced by a spring, S, on the shaft a.
  • the roller A slides ona feather.
  • the end-press ure is taken by the collar T and the end plates, r s; but these are details which may be much varied.
  • Fig. 2-'the sectional elevation of Fig. 2-I have'shown A and C slightly bulged. so as to clear the cone B. No recess is then rcquired in D.
  • a handle, H by which the spring S might be tightened, so as to vary the pressure while the gear was in motion. This gives one form* of friction-clutch.
  • the rollers in this variety bear only on points.
  • the end-pressure is taken in a manner analogous to that of Fig. l.
  • rollers A and D are bulged and the tightening is effected by pressing together two cones, B and B2, by the nut N and the spring S.
  • C and Cl are shown similarly adjustable; but this is not necessary. No end-pressure is produced by tightening in this arrangement, in which, how-l ever, the bearingsurfaces are still only points.
  • the three centers of C, B', and BAZ lthen form a triangle, and Aruns between these three rollers.
  • the tightening of the rollers can be effected by varying the shape of the triangle of the centers of C, B, and B2.
  • the roller C may be a floating ring carried by shoulders, as shown.
  • the outer ring, D might also be similarly carried.
  • This mode of tightening by lateral movement is especially convenient, as allowing a bearing along a line with no coning, no special fitting, the fewest possible number of bearings, and the simplest possible mode of tightening or slackening the gear, for it is obvious that if B were simply a handle we should have here a friction-clutch.
  • the cylindrical surface may consist of one or more V-grooves and projections so placed that the projection is jammed in the V by the lateral pressure.
  • An analogous arrangement is shown in Figs. 8 and S, the special point in this figure being the overlapping of B and B2.
  • lindrical surfaces of B and C should be divided into two parts, one on each side of' the surface of larger diameter. This larger portion then revolves inside a groove or cage connecting the two parts ofthe ring D. This arrangement lzeeps the resultants of all the pressures in one plane.
  • the two parts of D and D2 need not be connected.
  • One of the two parts might be floating and carried by grooves, and prevented from tripping by any suitable means.
  • Figs. l() and 10 one such plan is shown.
  • .D is the floating ring.
  • the means for tightening are analogous to those in the first form.
  • Fig. 9 shows the employment of the cone or end movement.
  • Fig. l0 shows the eccentric tightening or lateral movement.
  • Fig. ll shows the means of changing the direction of the axis ninety degrees, as by bevel-gearing.
  • the surface velocity of D and D2 is at the point of bearing the same as that of the surface of D and C, and .the angular-velocity ratio is inversely proportional to the radii. To avoid grinding action, the surfaces of D'l and D2 should touch those of B and C only at a point or very small surface.

Description

(No Model.) 17 Sheets-Sheet 1.
F. JENKIN.
DRIVING GEAR. 4 No. 297,407. Patented Apr. 22, 1884.
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N. PETERS, Ptwloumgmymr. wuhingmn. n n
(No Model.) 17 Sheets-Sheet 2.
F. JENKIN.
DRIVING. GEAR. y No. 297,407. Patented Apr. 22, 1884.
WITNESSES I Y Neem VW .n/261.72
(No Model.) 17 Sheets-Sheet 3.
P. J ENKIN.
DRIVING GEAR. No. 297,407. y Patented Apr. 22. 1.884.
(No Model.) 17 Sheets-Sheet 4.
P. J ENKIN.
DRIVING GEAR. No. 297,407. Patented Apr. 22, 1884.
WITNESS/ES |'NVENTOR %y a I .Fleembj N. Firms. mwumngnvm. Wasmngmn. n4 a (No Model.) 17 Sheets-Sheet 6.
P. JENKIN.
, DRIVING GEAR. N0.`29`7,407. Patented Apr. 22, 1884.`
(No Model.) 17 Sheets-Sheet 7.
F. JENKIN.
DRIVING GEAR.
No. 297,407. Patented Apr. 22, 1884.
' j) A C WITNESSES INVENTOR N. PETERS. Pholmlhographcr. Waxhinglun. D. (L
(No Model.) 17 Sheets-Sheet 8.
- F. JENKIN.
DRIVING GEAR. No. 297,407. `Patented Apr. 22, 1884.
WITNESSES INVENTOR l n Flea/nz) JMW/vzbv www "y By 2v2/'S .Attorney/6 (No Model.) 17 Sheets-Sheet 9.
P. JENKIN.
DRIVING GEAR.
No. 297,407. Patented Apr. 22, 1884.
. By 77/0'3 .Htorneys l N, Firms. mmmwgmphef, wamingm D, c;
(No Model.)
17 sheets-sheet 10.
F. JBNKIN. DRIVING GEAR.
Patented Apr. 22, 1884. 1329,10.
N. PETERS. Phowllhngnpher. Wuninmn. rnc,
17 Sheets-Sheet 11.
(No Model.)
F. JENKIN.
DRIVING GEAR.
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Patented Apr. 22, 1884.
INVENTOR (No Model.) 17 Sheets-Sheet 12.
1?'. J BNKIN.
DRIVING GEAR.
No. 297,407. Patented Apr. 22, 1884.
N. PETERS, Phllilhagraphen Washingln. D. C-
(No Model.) l 17 SheetsV-S'heet 13.
P. JENKIN.
DRIVING GEAR. NO. 297,407. Patented Apr. 22, 1884.-
N, Prms. Pmwmno'gmphcr. wnshingmn, D. c.
(No Model.) 17 Sheets-Sheet 14.
P. J ENKIN.
DRIVING GEAR. No. 297,407. Patented Apr. 22, 1884.
jfl/257,19.
WITNESSES INVENTOR MM/,MW
(No Model.) 17 Sheets-Sheet 15.
y F. J ENKIN.
DRIVING GEAR. No. 297,407. Patented Apr. 22, 1884.
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WTNESSES INVENTOR %j Fleemmyn/z/'n By H1016 ternel/5 N. PETERS. Fhoxwuxhegnphcr. wnhingmn, u. c.
(No Model.) 17 Sheets-Sheet I6.`
I'. J ENKIN.
DRIVING GEAR. l No.. 297,407. y Patented Apr. 22, 1884.
WITNESSES INVENTOR (No Model.) 17 Sheets-Sheet 17.
F. JENKIN.
DRIVING GEAR.
No. 297,407. Patented Apr. 22, 1884.-
`WITNESSES yINVENTOE N; Pneus. mwucmnpmf. wmingmn. u. c
titten Fri-iras .Farrar @triest FLFEMING JENKIN, OF EDINBURGH, SCOTLAND.
DRWENGDGEAR.
SPECIFICATION forming part of Letters Patent No. 297,@7, dated April 22, 188%.,
Application filed July 12, 1883.
(No model.) Patented in England April 14, 1883, Ne.1,913; in France May 21, 1883, l\'o155,568; in
Austiia August 1G, 1383, No. 20,212, and in Belgnm December' 10, 1883, No. 614:6.
fo aZZ whom may concern.:
Be it known that 1, FLEEMING JENKIN, a subject ot' the Queen of Great Britain, residing at 3 Great Stuart Street, Edinburgh, Scotland, have invented certain new and useful Improvements in Driving-Gear, (for which I have received Letters Patent in Great Britain, No. 1,913, dated April 14, 1883; in France, No. 155,558, dated May 211883; in Austria, No. 20,212, dated August 16, 1883, and in Belgium, No. 63,48,dated Decem-berlO, 1883,) of which the following is a specification.
My invention has tor its object the diminution ol" the loss by friction in transmitting power by gearing, and in many cases subsidiary advantages would followits adoption. iVhen toothed wheels are employed, unnecessary friction takes place, chieliy at the surfaces ofthe teeth. Noise and liability 'ot' breakage are further disadvantages of toothed gearing. W'hen belting is employed,unnecessary friction takes place, chietly at the bearings. There is also a loss 'from the bending ol" the belts, and there is a diiiiculty in regulating their tension. 'Vhen what is sometimes called frictional gearing77 is used, such Ythat the transmission of power depends on the friction between two solid wheels, usually grooved still more unnec'- essary friction is caused at the bearings, and the conical grooves usually employed cause a loss by grinding at their surfaces. None of these detects are 'found in nestgearing. My invention applies only to gearing consisting of circular wheels or circular wheels and racks, which racks may, however, be iiexible. It does not apply to toothed wheels or to frietional gearing the pitch-suriaces of which are elliptical orspiral or other non-circular forms. In all the varieties hereinafter described the improvementis obtained by the application of one common system-namely, the reduplication of parts so arranged that the pressure required to produce adhesion by friction shall not cause pressure to be put on the bearings. I have given the name ot' nestgearing to gearing made in accordance with my invention.
I will proceed to describe a number of varieties ot' nest-gearing, all designed in' accordance with my systein,and shown in the accompanying drawings, in which- Figure 1 is a plan view, partly in section, and Fig. 1L a view partly in elevation and partly in section, showing one form of nestgearing. Fig. 2 is a plan, and Fig. 2 a View partly in elevation and partly :in section, of a modiiication. Fig. 3 is a view partly in elevation and partly in section of another modiiication. Fig. L.t is a plan view, partly in section, and Fig. 4 a view partly in elevation and partly in section, of another.modification. Fig. 5 is a plan view, partly in section, and Fig. 5taview partly in elevation and partly in section, of another modification. a plan view, partly in section, and Fig. 6 a view partly in side elevation and partly in section, of another modification. Fig. 7 is a plan and Fig. 7 a view partly in elevation and partly in section, of another inodiiication. Fig. Sis a plan view, partly in section, and Fig. 8 a view partly in elevation and partly in sectipn, of another modification. Fig. 9 is a plan view, partly in section, and Fig. 9 a view partly in elevation and partly in section, of a modified forni of gearing. Fig. 10 is a plan, and Fig. 10 a view partly in elevation and partly in section ot' another modification. Fig. 11 is a view partly in elevation and partly in section of another modification, Fig. 12, a similar view of another n1odiiication; Fig. 13, a similar view of another inodiiication. Fig. 14 is a view in elevation of another modification; Fig. 15, a similar view of another modification. Fig. 16 is a view partly in elevation and partly in section of another modification; Fig. 17, a like View of another niodilication; Fig. 17a, alike view of another modification; Fig. 18, a like view of another modification; Fig. 19, a like View of another modification. Fig. 20 is a plan, and Fig. 20u a view partly in elevation and partly in section, of another modification. Fig. 21 is a plan view of another modification. Fig. 22 is aview partly inside elevation and partly in section of another modifica tion; and Fig. 23 shows a compressible coiled steel roller.
Firstz In order to multiply or reduce the angular-velocity.ratio to such moderate eX- Fig. 6 1s tent as would, with toothed wheels, be effected by a spur-wheel and pinion, I employ, Fig. 1, a smooth roller, A, of small size, working between two smooth cylindrical rollers, B and G. These three rollers are pressed together by the internal surface of a ring on a fourth wheel, D, and the three wheels inclosed by this ring form what I call a nest.7 The rollers are kept by suitable bearings (easily seen in the drawings Figs. l and F) so that their centers lie on the line F H, being one diameter of D; but the spindles of B and C run in bushes such as shown at b. These bushes are absolutelyfree to move in the line F H. I also arrange so that the spindles (l of D and a of A shall have so much play relatively to one another that no force employed to press A, B, C, and D together can bring any pressure on any bearing. A very slight' relative motion is all that is required, and less elaborate methods of giving the freedom may be employed than that represented. The mere play in a bush may be sufficient; but it .must be clearly understood that to take full advantage of my invention the a-Xis of only one shaft can be fixedin position. The other must be free to move relatively to this shaft in the manner described. The surface velocities of the outside of A and the inside of D are the same, and their angular-velocity ratio is the inverse ratio of the radii of these two surfaces. The smaller roller A may be outside B and C, as shown in Fig. 2, and is then pressed directly against the inside of D. The rollers A, B, and C may be equal or unequal. If they are unequal, we shall have four different angular-velocities all inversely proportional to the several radii. In this as in the previous arrangement, the bearings allow absolute freedom to the centers A, B, and C to adjust themselves on the line F H relatively to that of D; or, what would come to the same 1 thing, absolute freedom is given to three of the centers to adjust themselves relatively to the fourth. In consequence of this freedom the normal pressure by D on the inner rollers and the reciprocal normal pressure by the inner rollers on D and the normal pressure between the inner rollers themselves cause no pressure on any bearing. This normal pressure may therefore be of any desired or necessary amount to secure adhesion without causing any injurious friction. The rollersor rings must be so strong as not to be sensibly deformed by the pressure.
The reduplication of parts spoken of above is seen from the following consideration: In Fig. l, D is driven both by B and C, in Fig. 2, D is driven both by A and C.
The necessary tightening may be effected in three ways.
First, by initial adjustment. This may depend on accurate turning when all the rollers are sensibly rigid; otherwise one or more of the rollers may be made somewhat elastic, as by giving an india`-rubber tread to the rollers, or by forming one or more of these out of a surfaces.
stout coil or helix of steel capable of compression as to diameter by elongation of the coil in the direction of the axis. This compression as to diameter is compatible with the retention of a truly cylindrical form. Vhen these modes of tighteningare employed, the cylindrical surfaces of A, B, C, and D will all be such as are generated by a straight line revolving parallel to the axis of each roller. Figs. 2, 3 show one mode of carrying out this method. The spring is fast at one end to the shaft and in a slot at the other end.
Second, by the end movement of one rollersuch as A--made slightly taper for this purpose. Thesimplestform of this mode of tightening is shown in Fig. l, which is a sectional elevation of the gear shown in plan in Fig. l. In this case a small projection, m and a, is formed on B and C. A corresponding hollow is then formed in the ring of D, so that the straight lines on B an d C may bear against a straight line in D. These lilies will in practice be narrow,flat
The endpressure is shown as produced by a spring, S, on the shaft a. The roller A slides ona feather. The end-press ure is taken by the collar T and the end plates, r s; but these are details which may be much varied. In Fig. 2-'the sectional elevation of Fig. 2-I have'shown A and C slightly bulged. so as to clear the cone B. No recess is then rcquired in D. In this drawing I have also shown a handle, H, by which the spring S might be tightened, so as to vary the pressure while the gear was in motion. This gives one form* of friction-clutch. The rollers in this variety bear only on points. The end-pressure is taken in a manner analogous to that of Fig. l. In Fig. 3 the rollers A and D are bulged and the tightening is effected by pressing together two cones, B and B2, by the nut N and the spring S. In this figure C and Cl are shown similarly adjustable; but this is not necessary. No end-pressure is produced by tightening in this arrangement, in which, how-l ever, the bearingsurfaces are still only points.
A third mode of tighteningis given by jamming one of the three rollers between two others by a sidewise movement. A simple form of this arrangement is shown in Fig. 4.
The centers of A,B, and C are not in one straight line, and the handle H, with the spring S, j ams the roller A between B and C. This jamming action causes an injurious pressure on the bearings of A, B, and C perpendicular to the line F H; but if the center of A is very nearlyon the line F H, this injurious pressure may be Very small, and we have the advantage that the rollers bear on lines, not points. Figs. 5 and 5 show the same arrangement when A is next D. By a still further reduplication a pair of rollers, -3 B2, Figs. 6 and 6, maybe substituted for the single roller B. The three centers of C, B', and BAZ lthen form a triangle, and Aruns between these three rollers. By placing A more or less-eccentrically, the tightening of the rollers can be effected by varying the shape of the triangle of the centers of C, B, and B2.
IOO
IIO
To effect this we simply have to move one of the three rollers, as B', so as to wedge it between A and D, by forcing it into a narrower part of the space between these rollers. In this as in all other cases the position of only one axis is absolutely xed. A may have a hollow axis, and the axis of D may pass quite through it. An obvious but convenient modification of this arrangement is shown in Fig. 7 where A, as in Fig. 2, bears directly against D. vC is shown as the hollow-spindle, and the tightening is effected by forcing B and Bt apart. In these arrangements the bearings of one, or indeed of two, parts may be dispensed with. Thus, in Figs. 7 and 7, if A, B,"and B2 are carried by a frame, the roller C may be a floating ring carried by shoulders, as shown. The outer ring, D, might also be similarly carried. This mode of tightening by lateral movement is especially convenient, as allowing a bearing along a line with no coning, no special fitting, the fewest possible number of bearings, and the simplest possible mode of tightening or slackening the gear, for it is obvious that if B were simply a handle we should have here a friction-clutch. With this eccentric tightening?7 as it may be called, it is possible to adopt the corrugated surface of what has often been called frictional gearing-that is to say, the cylindrical surface may consist of one or more V-grooves and projections so placed that the projection is jammed in the V by the lateral pressure. An analogous arrangementis shown in Figs. 8 and S, the special point in this figure being the overlapping of B and B2.
The arrangements so far described are varieties of the rst form of nest-gearing, which may be substituted for a simple pinion and spur-wheel. I give the name of simple concentric nest-gearing77 to this arrangement, (the name is derived from the simplest form, as shown in Fig. 1,) but the name is applicable to all the varieties, even though no two of the rollers may be concentric.
Then it is desired still further to multiply or reduce the angular-velocity ratio, I employ a second form, which I will call multiple concentric nest-gearing,77 a simple form of which is shownin Figs. 9 and 9". I employ,
as before, a small cylindrical roller, A, now' placed between two rollers, D and C, and bearing against these where they are ofcomparatively large diameter'. These wheels have smaller concentric cylindrical surfaces b Zf" and c ci, which bear against the inner surface of' the ring D. In this arrangement the surface velocity of D relatively to that of A is diminished in the ratio of the diameter of' B to b or of C to c', which ratio should be the same in the two rollers. Calling this ratio in, and calling a the ratio of the diameter of D to that of A, the angular' velocity of A will be m n times that of D.
The arrangements as to centers are analogous to those described for the first form, and it is desirable that, as shown, the smaller cyany ofthe shafts I), c, or d.
lindrical surfaces of B and C should be divided into two parts, one on each side of' the surface of larger diameter. This larger portion then revolves inside a groove or cage connecting the two parts ofthe ring D. This arrangement lzeeps the resultants of all the pressures in one plane. The two parts of D and D2 need not be connected. One of the two parts might be floating and carried by grooves, and prevented from tripping by any suitable means. In Figs. l() and 10 one such plan is shown. .D is the floating ring. The means for tightening are analogous to those in the first form. Fig. 9 shows the employment of the cone or end movement. Fig. l0 shows the eccentric tightening or lateral movement.
The third variety of nest-gearing, which I will now describe, is one by which the direction of the axis of rotation can be changed, as well as the angular-velocity ratio. Fig. ll shows the means of changing the direction of the axis ninety degrees, as by bevel-gearing.
Two cylindrical rollers, D and C, are pinched `B and C might be slightly bulged and the inner surfaces of D and D slightly coned, instead ot' being flat. Then, by pressing the shaft d down on D and C, the pinching might be effected. A sidewisc pressure on one of t-he two rollers B and C might also be employed to jam these between D and D2. The surface velocity of D and D2 is at the point of bearing the same as that of the surface of D and C, and .the angular-velocity ratio is inversely proportional to the radii. To avoid grinding action, the surfaces of D'l and D2 should touch those of B and C only at a point or very small surface. secured by slightly rounding the surfaces of D and D2, as shown in Fig. Il; or these surfaces might be flat and B and C slightly rounded. The surfaces of D D2 might be beveled to fit part of similarly-beveled surfaces of B and C, these rollers being divided into beveled and simple rings, as in Fig. 17 and 17, This, however, will introduce some end-pressure; but it has the advantage of making the pinching contact on a line instead of on a point. The tworollers I3 and G need not be of the same diameter. The centers of B and C are free to approach. In Fig. 1l the bearing of G is shown as a bush working in a slot. No pressure applied by SA puts any pressure on Any ofthe shafts may obviously be the driver, and any other the follower. I calll this arrangement rightangle nest-gearing. 7 It may, however, be used for parallel driving, as when b is the drivingshaft and c the driven shaft. The portion D IOO I'IO
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504199A (en) * 1946-12-28 1950-04-18 Robert M Johanns Intermediate drive for phonograph motors
US2737821A (en) * 1951-01-23 1956-03-13 Papp Paul Frictional driving mechanisms
US2748615A (en) * 1949-11-03 1956-06-05 Nistri Umberto Transmissions of motion between driving and driven shafts in cinematic devices
US2766065A (en) * 1954-07-29 1956-10-09 Turco Products Inc Apparatus for cleaning tanks and the like
US2838953A (en) * 1953-10-08 1958-06-17 Casco Products Corp Power-operated radio antenna
US3264814A (en) * 1961-02-23 1966-08-09 Heberlein Patent Corp Friction gear
US3528306A (en) * 1968-12-04 1970-09-15 Zenith Radio Corp Drive mechanism for a television continuous tuner
US3528307A (en) * 1968-12-04 1970-09-15 Zenith Radio Corp Drive mechanism for a television continuous tuner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504199A (en) * 1946-12-28 1950-04-18 Robert M Johanns Intermediate drive for phonograph motors
US2748615A (en) * 1949-11-03 1956-06-05 Nistri Umberto Transmissions of motion between driving and driven shafts in cinematic devices
US2737821A (en) * 1951-01-23 1956-03-13 Papp Paul Frictional driving mechanisms
US2838953A (en) * 1953-10-08 1958-06-17 Casco Products Corp Power-operated radio antenna
US2766065A (en) * 1954-07-29 1956-10-09 Turco Products Inc Apparatus for cleaning tanks and the like
US3264814A (en) * 1961-02-23 1966-08-09 Heberlein Patent Corp Friction gear
US3528306A (en) * 1968-12-04 1970-09-15 Zenith Radio Corp Drive mechanism for a television continuous tuner
US3528307A (en) * 1968-12-04 1970-09-15 Zenith Radio Corp Drive mechanism for a television continuous tuner

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