Improvements in Carpet Sewing Machines.
Year: 1895

page_text: Date of Application, 29th Oct., 1895-Accepted, 30th Nov., 1895
COME DEI DR MITICATION.
[Communicated from abroad by THE SINGER MANUFACTURING Co., of New
York, in the United States of America, Sewing Machine Manufacturers.]
Improvements in Carpet Sewing Machines.
I. WILLIAM HARVEY INSLEE, Manager of The Singer Manufacturing
Company, Kilbowie, Dumbartonshire, do hereby declare the nature of this invention
and in what manner the same is to be performed, as communicated to me, to be
particularly described and ascertained in and by the following statement :-
This invention relates to certain improvements in the travelling carpet sewing
machine shewn and described in Specification of Patent No. 16460, dated
August 29, 1894, and has for its principal object to provide means whereby the
travelling machine may be yieldingly held and guided so that it may adapt itself
to any relative irregularities which there may be between the guideway or tracks
on which the machine runs and the rack-bar engaged by the tooth of the feeding
lever which propels the machine along; it being found in practice that it is
practically impossible to put up long sections of these tracks and rack-bars in such
a manner that the tracks and rack-bars will always be exactly parallel or so that
the rack-bars will always be of exactly the same height relative to the tracks or
guideway.
Another object of my invention is to provide a stopping pawl which is so connected
with the feeding lever that when the tooth of the latter is thrown laterally out of
engagement with the teeth of the rack-bar, to permit the machine to be run back-
ward, said pawl will be moved into such position as to engage the rack-bar and
thus prevent the machine from running away forward should there be friction
enough between the driving and belt guide pulleys and the endless driving belt to
draw the machine along on its tracks or rails.
In the drawings,
Fig. 1 is a front end view of my improved machine in connection with the tracks
and rack-bar, and Fig. 2 is a side view of the same.
Fig. 3 is a detail view of the rack-bar and safety catch or pawl, and
Figs. 4 and 5 are detail views of the stop which bears on the rack-bar.
The lower and upper tracks or rails A and A' are preferably in the form of
round bars fitted to which are lower grooved wheels and upper grooved wheels b¹
and suitably mounted relative to the frame B of the machine. The lower
wheels are preferably mounted in fixed spindles and in such a manner that they
can have no appreciable lateral movements thereon. The upper wheels 6' and 62
run on axles or pins e mounted in forks and having shanks c received in
sockets formed for their reception in the machine frame, and in which sockets,
beneath said shanks, are placed coil springs d which force said upper grooved
wheels upward into yielding contact with the upper track or rail A¹ and also hold
the lower grooved wheels downward on the lower track or rail A.
The forks and c², receiving the wheels band 62, are somewhat wider between
their arnis than the said wheels so that the latter can have limited sidewise
movements on their pins or axles to permit the machine to move laterally
slightly at its top. The fork e¹ has a hollow extension or sleeve e which receives a
coil spring which, pressing against the wheel held steady laterally by the
fixed track or rail A', has a tendency to tilt the top of the machine over toward
the right (Fig. 1) this tendency being resisted by a stop 9 attached to the machine
IP Q17

page_text: travelling sewing machine to run thereon and provided with the lower guide-
wheels 6 and the upper guide-wheels b' and 62, the forks c and 2 by which the
said upper guide-wheels are carried and in which they are journalled, said forks
being wider between their arms than said wheels, to permit of relative lateral
movements of said wheels and forks, the coil spring farranged to press against the
said wheel b and a part of the machine, the rack-bar G, a feeding mechanism
co-operating with said rack-bar, to move the machine forward intermittently, and
the stop g arranged to bear on said rack-bar by the pressure of the said spring,
said stop consisting of two separated parts or arms, and the rod or pin 9' on which
said stop is pivoted and which is provided with the eccentric portion g² received
in a hole in the shank of said stop, to provide for vertical adjustment of the
latter.
4. The combination with a track or guideway, and a travelling sewing machine
to run thereon, of a rack-bar parallel with the said track or guideway, a feeding
mechanism co-operating with said rack-bar to move the machine intermittently
forward and comprising the vertically reciprocating holding bar I having the
tooth i, and the vertically reciprocating and horizontally swinging feed lever H
provided with the pivoted part or yoke h³ having the feeding tooth h², said yoke
having attached thereto the spring-pressed safety catch or pawl having a tooth /*
arranged to be thrown into engagement with the teeth of said rack-bar when the
said feeding tooth is disengaged therefrom, and vice versa.
Dated this 28th day of October 1895.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 St. Vincent Street, Glasgow, Agent for the Applicant.