Improvements in Self Acting Cross Cut Saw Benches.
Year: 1892

page_text: Date of Application, 11th Mar., 1892
Complete Specification Left, 8th Dec., 1892-Accepted, 14th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Self Acting Cross Cut Saw Benches.
I, THOMAS NIELD ROBINSON, of the firm of Thomas Robinson and Son
Limited, of Railway Works, Rochdale, in the County of Lancaster, Machine
Makers, do hereby declare the nature of this invention to be as follows :--
My invention relates to improvements in those cross cut saw benches in which
the spindle of the circular saw is mounted on a carriage in slideways on the
machine frame and my improvements consist in certain novel arrangements and
combinations of mechanism whereby I am able to dispense with the screw and
positive driving for the traverse in both directions of the saw carriage.
In constructing a cross cut saw bench according to my improvements I fit the
spindle of the circular saw on a carriage in slideways in the machine frame in the
usual or in other convenient manner; and I employ stops preferably mounted on a
stop rod to regulate the travel and stoppage of the saw at any required position.
To the saw carriage I attach a rope, band, or chain which passes over and is
secured to a pulley mounted on a shaft which carries a friction wheel at the feed
end of the machine; below this shaft is a friction wheel mounted on a shaft in
bearings carried by a pivoted treadle lever which lever is under the control of the
operative; and on this shaft is a pulley driven by a band from the driving shaft
placed near the other end of the machine or in any convenient position.
To start the machine the operative depresses the treadle lever thereby bringing
the friction wheels into contact and setting the first named shaft into motion and
so winding the rope on its pulley and drawing the saw in its carriage toward the
fence on the top of the bench; as soon as the carriage meets the stop on the stop
rod the treadle lever is released and the friction wheels moved out of contact,
thereby stopping the feed motion and allowing a weight at the other end of the
machine to draw back by means of suitable connections the saw carriage ready for
making a fresh cut.
Dated this 10th day of March 1892
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Self Acting Cross Cut Saw Benches.
I, THOMAS NIELD ROBINSON, of the firm of Thomas Robinson and Son
Limited, of Railway Works, Rochdale, in the County of Lancaster, Machine
Makers, 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 improvements in those cross cut saw benches in which
the spindle of the circular saw is mounted on a carriage in slideways on the machine
frame and my improvements consist in certain novel arrangements and combina-
tions of mechanisin whereby I am able to dispense with the screw and positive
driving for the traverse in both directions of the saw carriage.
In constructing a cross cut saw bench according to my improvements I fit the
spindle of the circular saw on a carriage in slideways in the machine frame in the
usual or in other convenient manner; and I employ stops preferably mounted on a
stop rod to regulate the travel and stoppage of the saw at any required position.
To the saw carriage I attach a rope, band or chain which passes over and is
Cu

page_text: secured to a pulley mounted on a shaft which carries a friction wheel at the feed
end of the machine; below this shaft is a friction wheel mounted on a shaft in
bearings carried by a pivoted treadle lever which lever is under the control of the
operative; and on this shaft is a pulley driven by a band from the driving shaft
placed near the other end of the machine or in any convenient position.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying drawings & the figures and letters marked
thereon.
Fig. 1 is a side view and Fig. 2 an end view of a self acting cross cut saw beach
made according to my invention.
*
In these views, a represents the machine frame on the top of which is fitted a
fence b for the timber to rest against whilst being cross cut: the circular saw c is
secured upon a spindle e' mounted in bearings d'on a carriage d fitted in slideways
on the machine frame in any convenient manner and on the saw spindle c' is secured
a pulley. To the saw carriage d I attach a band e or its equivalent which passes
over a guide pulley and is secured to a pulley g fixed on a shaft h on which is also
secured a large friction wheel i; below this shaft is a friction wheel mounted on a
shaft j in bearings carried by a treadle lever k pivoted at k¹ and the shaft j' also
carries a pulley driven by a band from a pulley m on a shaft m near the other
end of the machine.
To the other end of the saw carriage d is secured another band n which passes
over a guide pulley o and has attached to it a weight p.
To start the machine a driving band on the pulley c² of the saw spindle is set in
motion to drive the saw and motion is also given to the pulleys and shaft m in any
convenient manner and the timber to be cross cut is placed upon the table of the
machine against the frame b; when this has been done the operative depresses
with his foot the treadle lever thereby bringing and holding the friction wheel j
on the shaft in contact with the friction wheel on the shaft h and imparting
motion to the latter, thus winding the band e on to the pulley and drawing the
saw carriage d and saw c towards the fence on the top of the saw bench; as soon
as the saw has cut through the timber and is required to return the foot is removed
from the treadle and the friction wheel allowed to move away from the friction
wheel thereby stopping the rotation of the shaft and the pulley g of the feed
motion and allowing the weight p at the other end of the machine to draw back
the saw carriage d by means of the band a ready for a fresh cut to be made by
the saw.
t
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. In a self acting cross cut saw bench in which the spindle of the circular saw
is mounted in a sliding carriage I claim dispensing with the screw and means
ordinarily employed for driving the saw carriage positively in both directions
and substituting therefor friction gearing and a weight arranged and operating
substantially as herein set forth.
2. The general combination and arrangement of parts embodying my improve-
ments in self acting cross cut saw benches substantially as herein set forth, for the
purpose specified.
Dated this 7th day of December.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.