Year: 1888

page_text: Date of Application, 27th Aug., 1888
Specification Accepted, 4th May, 1889
I ALEXANDER PITMON GIBSON, residing in the town of Mount Ida, in the County
of Fayette, State of West Virginia, United States of America, a carpenter, 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:
This invention has reference to feeding devices for saw-mills and machines and
it consists in the improvements hereinafter described whereby an efficient and
positively actuated apparatus is provided.
In the accompanying drawings forming part of this specification,
Fig. 1 is a perspective view.
Fig. 2 is a plan view showing the parts adjusted to reverse the carrying feed and
Fig. 3 is a detail view of one of the bearings.
Å designates the frame of the machine which is suitably supported and comprises
the end bars, a, b, side bars, c and intermediate parallel bars d, e.
The upper edges of the bars d, e, are recessed in transverse line with bearing
boxes located on the upper side of the said bars, c, c. A transverse shaft, B,
turns in said bearings and is provided between the bars, c, e, with a pulley suitable
for communicating movement to the feed-carriage.
Adjacent to the inner side of each of the bars de on the shaft B are located
metal disks C, D, the inner faces of which are vertical and planed smooth while
the outer side of each is convexed.
Between the intermediate bars d, e is located an inclined block E which is
recessed on its upper side to form a central bearing for a longitudinal shaft, F
retained in position by a section f¹ bolted to the block E. A block, G is also
located between the bars, d. e. and is inclined parallel with the block E, and said
block G is also recessed to form a bearing for a smaller box, G¹ a section bolted
on the box G forming a closed bearing.
J.
The said shaft F is provided at its ends with the wheels H H the wheel at
the inner or upper end having the greater diameter.
Each wheel HH' is provided with a friction periphery h. which may be built up
of paper or otherwise as may be desirable.
A horizontal bell crank lever ; is pivoted upon the upper face of the bar & and
has one of its ends connected by a link k with the box G while the other end is

page_text: attached to a vertical lever I provided at one end of the frame. Two collars, l, are
formed upon the shaft F between the blocks E and G and said shaft between said
collars, is embraced by the transverse portion J of an angle frame, K the longi-
tudinal portion of which is horizontally slotted for the passage of guide bolts m.
The free end of the frame has connected thereto the lower end of a lever M which is
pivoted on the inner side of the bar, e.
N designates the drive-shaft which is journaled in the bars c d. and is adapted to
be driven from any desirable power source and is provided on its inner end with
a disk plane-faced upon its inner side to afford a proper frictional bearing for the
wheel H.
By operating the lever M so as to shift the frame K on its guide bolts the
shaft may be shifted longitudinally so as to bring the wheel H in its contact with the
disk O farther from or nearer to the center of said disk and thus vary the degree of
rotation at which the shaft is driven.
If the movement of the shaft F brings the wheel H nearer to the centre of the disk (
then said shaft will be driven at a slower speed.
When the shaft F is operated to cause the wheel H to engage near the centre of
disk O, then the wheel H¹ will be caused to engage near the periphery either of the
disk C or of disk D. As the wheel H moves away from the centre of the disk with
which it engages to the same extent as it moves towards the centre of O the disk C,
or D whichever is in engagement, will be driven at a suitable speed whatever the
position of the carriage.
By moving the lever I the bell crank lever connections will serve to transversely
move the shaft in block G so as to change the contact of the wheel H¹ from disk C to D
or vice versa.
From the preceding description it will be seen that the device is not only of simple
and durabic construction but that its parts may be readily operated to secure the
various adjustments with but little attendant vibration.
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:
1. The combination with the feed shaft provided with the disks C. D) of the trans-
versely movable bearing boxes, a shaft F journaled in said boxes and longitudinally
movable therein, friction wheels H H1 of different diameters, secured on said shaft a
lever connected to said shaft F to move the same in its bearings and a drive-disk
contacting with the wheel H substantially as specified.
2. The combination with the feed-shaft provided with the disks C. D, of the shaft F
bearing in bars and longitudinally movable therein, friction-wheels H H' of different
diameters, secured on said shaft a frame K slotted to play on guide bolts and having
a portion embracing said shaft F and a lever for shifting said frame and shaft,
substantially as specified.
3. The combination of the longitudinally movable shaft. F, having the friction
wheels H H', a drive shaft having a disk contacting with the wheel H, a journal box
receiving the shaft F, a horizontal bell crank lever arranged near one end of said
journal box, a link connecting said lever to the journal-box and an operating-lever
connected to the bell crank lever, as set forth.
Datal thi
1000
BERNHARD DUKES,
226, High Holborn, London, W.0%,
Agent for the Applicant.