Machinery.
Year: 1887

page_text: Date of Application, 20th Sept., 1887
Complete Left, 20th June, 1888
Complete Accepted, 20th July, 1888
Machinery.
We JOHN VICARS, THOMAS VICARS and JOHN VICARS the Younger, all of
No. 56 Seel Street, Liverpool, in the County of Lancaster, Engineers do hereby
declare the nature of this invention to be as follows:-
The object is to provide simplified and comparatively silently acting apparatus for
giving intermittent motion to imachinery.
The invention consists essentially in the combination of the following parts,
A pulley to be driven, an arm free to oscillate on the pulley shaft, a pawl, or grip-piece
pivotted to the arm a connecting rod coupled to a tail piece forming part of the pawl
or grip piece and a stop attached to the arm. The usual or any convenient
mechanisin is employed to prevent reverse action of the pulley and weights or
equivalent appliances are used to balance and assist the motion of the parts.
Dated the 19th September 1887.
JAMES JOHNSON,
Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Giving Intermittent Motion to
Machinery.
We JOHN VICARS, THOMAS VICARS and JOHN VICARS the younger, all of
No. 56 Seel Street, Liverpool, in the County of Lancaster Engineers 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:—
The object is to provide simplified and comparatively silently acting apparatus for
giving intermittent motion to machinery.
The invention consists essentially in the combination of the following parts,
a pulley to be driven, an arm free to oscillate on the pulley shaft, a pawl or
grip piece pivotted to the arm, a connecting rod coupled to a tail piece forming part
of the pawl or grip piece and a stop attached to the arm.
The usual or any
convenient mechanism is employed to prevent reverse action of the pulley, and
weights or equivalent appliances are used to balance and assist the motion of
the parts.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is an elevation, and fig. 2 a plan of apparatus under our invention. a pulley
to be driven, b pulley shaft, c arm free to oscillate on the shaft b. d grip piece pivotted
to the arm eat e. f connecting rod coupled to the tail piece y forming part of the
grip piece d, stop piece pivotted on the pulley shaft and joined to the arm c
by a bolt and nuts. The arm c is weighted at j so as to balance the parts in motion.
The grip piece d is made with two acting surfaces and l, the surface k works in
conjunction with the pulley a and the surface 7 bites on the stop piece h. The action
is as follows:-
When motion is given to the connecting rod f in the direction of the arrow the grip
piece d turns on its axis e grips the pulley a and imparts motion thereto; on the
reverse stroke of the connecting rod the grip piece d turns on its axis so as to free the
surface from the pulley a and cause the surface to bind against the stop pieco
when the backward motion has reached the desired extent, by means of the bolt and
nuts the position of the stop piece may be varied and the amount of backward
notion regulated. Instead of an adjustable stop a fixed stop as shewn at fig. 3 may
be used. The grip piece may be a pawl as shewn at fig. 3 and the pulley may be
formed with ratchet teeth.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what
wo claim is,
Apparatus having the combination of parts herein specified for the purpose set
forth.