Transporting Loads, and for similar Purposes.
Year: 1888

page_text: Transporting Loads, and for similar Purposes.
I WALTER HART, of 22 Warren street in the City and State of New York, United
States of America, Salesman do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :--
The present improvements relate generally to mechanism for transmitting power
through the medium of ropes, belts, chains, rails and similar devices, that is.to say, the
improvements are applicable to machines for hoisting and lowering, pulling and
pushing, for the manipulation of ropes, cables and belts, and for conducting loads
along fixed rails, bars and rods.
The object of the invention is to arrange clutching mechanism so as to regularly
engage and disengage from the medium through which the power is to be transmitted,
and to be adjustable to mediums of different kinds as well as various rates of
speed.
The invention consists of two discs arranged to rotate in different planes, one of
such discs being bevelled while the other is right angular or plain, the clutching faces
of the discs being arranged so that one point or radial line thereof will be parallel
with the corresponding part of the other disc, and on opposite sides of the said point
or line the surfaces of the discs gradually recede from each other, so that the space
between the discs increases to a point diametrically opposite the parallel surfaces of
the discs.
In the accompanying drawings
Figure 1 is a central longitudinal section of the main parts of a machine embodying
my improvements.
.
Figure 2 is a cross section on the line, a looking toward the left hand.
Figure 3 is a vertical section of the inclined or bevelled disc.
Figure 4 is a face view of the same.
Figure 5 is a face view of the plain disc and its grooved drum.
Figures 6, 7 and 8 are views of modified forms of the parts of figures 3, 4

page_text: Referring to these views in detail, A and B represent the main standards of the
machine, which standards rise from any suitable base or bed. The tops of the
standards are provided with journals C and D which support the externally threaded
sleeve F. This sleeve is grooved lengthwise as seen at G and a projection or feather H
(Figure 2) upon the inner surface of the bearing Centers this groove, and thereby
prevents the sleeve rotating while permitting lengthwise motion thereof in the
bearings.
Located between these bearings and surrounding the sleeve is the nut I, which is
internally threaded in accordance with the external thread of the sleeve, and serves as
a means to move the sleeve lengthwise. This nut preferably may be the hub of a
hand wheel whose spokes may also be represented by J, but other means of rotating
the nut may be applied. K is the main shaft which passes through the sleeve, and at
one of its ends may be provided with any suitable means for giving it rotation,
though it is essential that such means shall be capable of regulation as to the speed
and reversal of the motion of the main shaft. Upon this shaft is fixed one of the
clamping discs L which is a plain right angle disc of suitable thickness, having a
drum M which is longitudinally grooved as seen at N. The other clamping disc O is
loose and has rotary, longitudinal and inclined movements. This disc is regularly
bevelled from its centre to its edges, or slightly coned. This bevelled or coned
disc is provided with a hollow sleeve P which is flanged so as to engage the
friction wheels Q pivoted to the inner surface of arms at the end of the sleeve F
and in a plane inclined to the main shaft. The central opening of the disc is
shaped to correspond to the form of the drum M of the fixed disc; that is, the
projections R are designed to enter the grooves N when the bevelled disc is
mounted upon this drum and in operative position relatively to the fixed disc. In
such position, the inclined disc bas a portion of its clamping surface at one point
or along one radial line parallel with the surface of the fixed disc, and all other
portions of its surface gradually more and more inclined thereto until the diametrically
opposite point is reached.
In order to prevent longitudinal motion of the main shaft through the threaded
sleeve, a collar S is fixed thereto, and between it and the head of the bearing D, and
in suitable grooves are arranged the anti-friction balls T. This collar receives the
thrust of the threaded sleeve, which is of course directly proportioned to the gripping
pressure. It is highly essential, therefore, to reduce the friction between this collar
and the bearing of the sleeve as much as possible, and in order to secure well
adjusted parts I have employed the friction balls T.
By this explanation it will be seen that, while the bevelled disc moves longitudinally
on the drum of the fixed disc, it nevertheless must revolve with it and within the
arms of the threaded sleeve; as also, that the turning of the threaded nut, which is
held from moving longitudinally between the bearings of the threaded sleeve, will
cause such sleeve to advance or recede on the main shaft and thereby move the
bevelled disc to or from the fixed disc.
When motion is imparted to the main shaft, the discs are rotated simultaneously
in the same direction, but in different planes, and, because of the conical form of the
bevelled disc and the inclination of its axis to the main shaft, the faces of the two
discs are constantly approaching and receding from each other, as during rotation
they approach and recede from each other in a circular direction from the point or
line where they are parallel. Accordingly, if a rope or like device be clamped
between the two discs as they are revolved by the main shaft, it will be continuously
drawn in between the discs as they gradually and regularly close upon the unseized
portions thereof and release the portions that have been clamped. And if, during
such operation, it be necessary to more tightly clamp the rope because of increased
load or otherwise, the discs may be made to approach each other along the axis of the
main shaft by turning the nut on the threaded sleeve that supports and gives angular
motion to the movable disc in fact, the grasp upon the rope may be modified or
entirely released at the will of the operator, and independent of whether the discs he
revolving or not

page_text: The discs thus far described have plain clamping surfaces, but the faces of the
discs may be provided with radial ridges as seen at U in Figures 6-8. These faces
may of course be grooved or otherwise shaped to afford a suitable grasp for the
cable, belt or other medium that may be employed for transmitting power.
In carrying out my invention I do not limit myself to the precise form of mechanism
here shown, for obviously it may be variously modified and added to in order to
adapt the machine to various kinds of work.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
:-
First The combination of a plain-faced disk and an adjustable bevelled disc
arranged to rotate in different planes, substantially as, and for the purposes, specified.
Second-The combination of a bevel-faced disc and a plain-faced disc arranged to
rotate in different planes, and means for. varying the distance between the discs as
and for the purposes herein specified.
Third-The combination of the plain faced disc carrying a grooved drum and the
bevel-faced disc provided with inwardly projecting lugs and mounted on a sleeve
journalled in inclined bearings, the said inwardly projecting lugs being adapted to
enter the grooves of the drum carried by the plain-faced disc substantially as, and
for the purposes, herein specified.
Fourth In combination, of a plain faced disc rigidly mounted upon a shaft,.a
bevel-faced disce movably mounted upon the same shaft and rotating in a plane
inclined to that of the fixed disc, a fixed bearing upon the said shaft, and friction
balls arranged between said bearing and the movable disc, substantially as, and for
the purposes, specified.
Fifth In combination, the main shaft K the discs and threaded sleeve mounted
thereon, the journal D, the collar S and the friction balls T, substantially as
specified.
Sixth-In combination, the main shaft K, the discs and threaded sleeve mounted
thereon, the journals C and D the nut I the collar S and the friction balls T
substantially as specified.
Dated this 29th day of November 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.