Improvements in the Feed Motions of Machine Tools.
Year: 1895

page_text: Camulada Onna
Date of Application, 19th June, 1895
TT
ALL
L
1000
Olot Man
4006
PROVISIONAL SPECIFICATION.
Improvements in the Feed Motions of Machine Tools.
We, THOMAS SMITH, of 18 Tatton Street, Salford, in the County of Lancaster,
Fitter, and JOHN RIDGWAY, of 10 Harrietta Street, Hightown, Manchester, in the
said county, Mechanical Draughtsman, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to improvements in the feed motion of machine tools and
is particularly applicable to planing machines and the object of our invention is
to provide a simple feed which is capable of a wide range of adjustment.
In carrying our improvements into effect we employ a worm which is driven in
any convenient manner and drives a worm wheel mounted upon a stud and on the
boss of this wheel is fixed a driver plate (or plates) to which is secured a pair of
adjustable stops; mounted loosely on this boss is a ratchet wheel and also pivoted
loosely upon the boss is a lever with a pawl which is free to engage with the teeth
of the ratchet wheel and has a stud or projection which lies in the path of the
adjustable stops. In gear with the ratchet wheel is a pinion which conveys
the feed motion to the tool slides or holder in any convenient manner. To
alter the amount of feed one of the stops is moved nearer to or further from the
other.
An equivalent for the pawl lever mounted loosely on the boss might be
employed to convey the motion from the stops on the driver plate to the ratchet
wheel and feed motion.
Dated this 18th day of June 1895.
H. B. BARLOW & GILLETT,
Agents for Applicants.
CUMI LEIE SPECIFICATION.
Improvements in the Feed Motions of Machine Tools.
We, THOMAS SMITH of 18 Tatton Street, Salford, in the County of Lancaster,
Fitter, and JOHN RIDGWAY, of 10 Harrietta Street, Hightown, Manchester,
in the said county, Mechanical Draughtsman, 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 :-
Our invention relates to improvements in the feed motion of machine tools, and
is particularly applicable to plåning machines, but may also be applied to shaping,
slotting, or like machines.
The object of our said invention is to provide a simple feed which is capable
of a wide range of adjustment.
We attain this object by the means hereinafter described reference being made
to the accompanying three sheets of drawings in which
Fig. 1 Sheet 1 represents a side view of part of a planing machine with our
invention applied.
Fig. 2 Sheet 2 is an end view and Fig. 3 Sheet 3 a plan of the same.
In these views similar letters refer to similar parts.

page_text: In carrying our improvements into effect we employ a worm as a that may be
driven from the screw shaft g by the intervention of bevel gearing ; as shown
on the drawing or in other convenient manner; said worm transmits motion to
the worm wheel b which is mounted on a stud or shaft b¹. We place a combined
tooth and ratchet wheel c loosely on the boss of the worm wheel band on the same
boss we pivot a lever as d to which a pawle is connected that is free to engage in the
teeth of the aforesaid ratchet wheel. We fit a stud fou and projecting from the
leverd in the path of the adjustable blocks or stops and that are fitted to slide
in a groove m¹ formed on the periphery of a driver plate as m which is secured to
the boss of the worm wheel b. Each or both of the aforesaid blocks or stops /
and may be moved round to any position nearer to or farther from each other,
and fixed in such position by means of the set screw 1³.
Feed motion is conveyed from the combined tooth and ratchet wheel c to the
tool slides or holders by ineans of spur and bevel gearing as 9 or in other convenient
manner.
The amount of feed is regulated by moving one of the stops or nearer to
or farther from the other where it is secured in the manner herein before
described.
When the table on which the work is fixed is moving back, the driver plate m
will be revolved in the direction indicated by the arrow on Fig. 1 and the block or
stop will engage with the stud f; the pawl e will then engage with the teeth of
the ratchet wheel c thereby imparting motion through the aforesaid gearing q
to the tool slides or holders. When the table is travelling forwards the aforesaid
plate m will revolve in a reverse direction and the stop will recede from the stud f
while the stop will approach said stud and when in contact the pawlf will pass
inoperatively over the teeth of the wheel c. By these means an independent motion
is obtained for the feed distinct from the mechanism that is employed for reversing
the table.
In the accompanying drawings we have shown the driver plate m, the combined
tooth and ratchet wheel e and the worm wheel b in close proximity and driven from
the screw shaft g but we do not confine ourselves to the precise relative positions
as shown as it is obvious that in some cases it may be more convenient to drive
from any driving shaft connected with the machine, and to place the driver plate m
and the worm wheel b on opposite sides of the machine, and the combined tooth
and ratchet wheel may be constructed separately, but
Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed we declare that what we
claim is :-
-:
In planing, shaping, slotting or like machines, the combination of a driver plate
as m with adjustable blocks or stops fitted thereto, a lever d to which a stud as f
and a pawl e are connected, a tooth wheel and a ratchet wheel c, a worm wheel b
and woim a driven from the screw or other shaft by the intervention of suitable
gearing or in other convenient manner, all substantially as and for the purpose
herein before described.
Dated this 5th day of February 1896.
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
Agent for Applicants.