Improvement in Hangers for Belt Guide Pulleys.
Year: 1890

page_text: Date of Application, 22nd May, 1890-Accepted, 19th July, 1890
COMPLETE SPECIFICATION.
Improvement in Hangers for Belt Guide Pulleys.
I, JOHN JONES, of Britannia Foundry, Loughborough in the County of Leicester,
Engineer, 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 :-
My invention relates to swivel or swing hangers for guide pulleys for belts driving
machine pulleys on shafts placed at an angle to the line shaft, and consists in an
improved construction of said hangers by means of which the belt is securely held
upon the pulley.
On the sheet of drawings appended hereunto fig. 1 shows a front view of the
improved hanger with the upper part in section, and
Fig. 2. a cross section of the same.
Fig. 3. a front view of a hanger as hitherto used.
The hanger consists of an open frame with bosses a a in which a shaft b is fixed
upon which the guide pulley c runs. The webs d d connect the bosses to the
hanger topf which curved to the arc of a circle and held up by a bolt g against
a bed plate h hollowed out to fit the hanger top f. The hanger top is forined with
a long slot for the bolt so that the hanger can be swivelled in a vertical plane ;
while by turning the bed plate it can be swivelled in a horizontal plane, and by
these means the pulley and shaft be set to any angle they may be required to be
put at for correctly guiding the belt from the driving to the machine pulley, after
which the position is secured by tightening the nut i against the beam or other part
the hanger is fixed to.
Hitherto the webs d d have been formed with horns or checks fig. 3 projecting
only a short distance beyond the rim of the pulley for the purpose of holding the
belt upon the pulley. These, however, do not prevent the belts from frequently
mounting or getting over the horn-plates, as the angular position and unequal
tension of belts in such cases causes them often to run towards one side, especially if
the position of the guide pulley is not quite correct, and the belts are damaged and
the machine stopped. The object of my invention is to prevent these damages and
stoppages, which I effect by prolonging the horns or check plates 1, figs. 1 and 2,
till they meet the top. In the horns openings m m are formed to allow the bolt
head g and washer n to pass through. This arrangement of horns renders it
impossible for the belt to leave the pulley.
With horns so formed the part of the webs d between them and the top ƒ may
be dispensed with, the horns taking their place and being when desired connected by
ribs to the top f
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
In swivel or swing hangers for belt guide pulleys, horns or checks extending at
each side of the rim of the pulley up to the hanger top and formed with openings
for the head and washer of the bolt for fixing the hanger, substantially as herein-
before described and illustrated by the drawings.
Dated this 19th day of May 1890.
W. T. EMMUTT,
Agent for the Applicant.