Improvements in or connected with Ecraseurs or like Instruments for Castrating, and for other purposes.
Year: 1895

page_text: Date of Application, 25th Oct., +1895
Complete Specification Left, 25th July, 1896-Accepted, 29th Aug., 1896
PROVISIONAL SPECIFICATION.
Improvements in or connected with Ecraseurs or like Instruments
for Castrating, and for other purposes.
I, JAMES ARNOLD of the Firm of 'Arnold and Sons of 31 West Smithfield in
the City and County of London, Surgical and Veterinary Instrument Makers,
do hereby declare the nature of this invention to be as follows:-
Instruments for castrating and other purposes known as Ecraseurs have been
heretofore constructed with a screwed motor, shaft, rotated by a handle and caused
thereby to traverse a carrier to which the ends of the chain are attached. This
carrier has been formed with a nut with which the motor screw is always in
engagement, and loss of time and inconvenience is incurred by the fact that the
chain can be tightened but slowly by rotating the motor, screw. Now the object
of my invention is to so construct the instrument as hereafter described, that the
chain may be brought closely around the part; to be severed or crushed by a quick
action, and this having been thus rapidly effected, the action of the motor, screw
may then immediately be applied for the finish of the operation, without, any loss
of time, by adjusting the screw or otherwise.
To this end I provide a tubular stem with lengthway slot,as usual, but I fit the
motor screw with collars or shoulders so that it may have a rotating but not
endway motion. The ends of the chain are gripped and held to the carrier, in any
convenient manner say by a screw, spring, or equivalent means with a terminal
knob or handle, and the said carrier I fix or form with a tubular, sleeve located
within the stem, through which sleeve the motor screw freely passes.
This carrier sleeve is plain on its interior, but is slotted, say on two lateral sides,
and above these slots are provided spring teeth formed with partial threads, so that
upon the teeth being pressed through the slots the carrier will be locked to the
motor screw and be traversed by its rotation.
Over the carrier sleeve is a laterally slotted tube adapted to be. slidden length-
ways, thereon by means of a handle passing through, the lengthway. slot of the
tubular stem; the slots in the said, tube are so arranged that when in one endway
position the spring teeth are pressed into engagement with the screw, and when
in the other position the teeth are out of engagement.
By apparatus constructed according to my invention the chain may be adjusted
into position, and the spring teeth not being in engagement with the motor, screw,
the carrier may be seized by the knob or handle and the slack of the chain taken
up; this having been done the spring teeth are forced into, engagement with the
motor screw, by, sliding the slotted tube by means of its projecting knob or handle,
and the screw may then be immediately and, effectively operated to tighten the
chain without any loss of time or inconvenience, and it should also be noted that
the handle by which the motor screw is operated has no endway or lengthway
motion whatever. During an operation with this instrument a further advantage
is that should the chain require adjustment or removal the same can be instantly
done by simply sliding the knob or handle in, the reverse, direction.
Dated this 25th day of October 1895.

page_text: Improvements in or connected with Ecraseurs or like Instruments
for Castrating, and for other purposes.
I, JAMES ARNOLD, of the Firm of Arnold and Sons of 31 West Smithfield, in
the City and County of London, Surgical and Veterinary Instrument 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:-
Instruments for castrating and other purposes, known as Ecraseurs, have been
heretofore constructed with a screwed motor shaft, rotated by a handle, and caused
thereby to traverse a carrier, to which the ends of the chain are attached. This
carrier has been formed with a nut, with which the motor screw is always in
engagement, and loss of time and inconvenience is incurred, by the fact, that the
chain can be tightened but slowly by rotating the motor screw.
Now the object
of my invention is to so construct the instrument as hereafter described, that the
chain may be brought closely around the part to be severed or crushed by a quick
action, and this having been thus rapidly effected, the action of the motor screw
may then immediately be applied, for the finish of the operation, without any loss
of time by adjusting the screw or otherwise.
I will now fully describe my invention, with reference to the accompanying
drawings, wherein
Fig. 1 is a plan view of an ecraseur, constructed with means for rapid adjustment
and operation therewith according to my invention, Fig. 2 is a sectional side
elevation of the same instrument,
Fig. 3 is a sectional plan view of the device detached, for connecting and dis-
connecting the chain, wire, or cord, to or from the motor screw, the device being in
the connected position';
Fig. 4 is a plan and Fig. 5 a sectional plan of the device, in the disconnected
position.
Similar letters of reference refer to like parts in the several figures of the
drawings.
According to any invention I provide a suitable stem A (generally tubular and
with lengthway slot A¹ therein as usual), and I fit the motor screw B onto or into
the stem A with a collar or shoulder C so that it (the screw B) may have a
rotating but not end way motion. In the construction shewn the collar C bears
between the open end of the tubular stem A, and an end cap 'D, the latter being
attached to the stem A say by a bayonet joint or equivalent fixing; E is the
bandle fixed upon the projecting shaft of the motor screw B, the opposite end of
the latter bearing against and being centered in the solid end of the stem A.
ends of the chain, wire, or cord Fare gripped and held to a carrier G in any
convenient manner, say by being sunk therein and secured by a screw, spring, or
equivalent means, with a terminal knob or handle G', and the said carrier G
I fix or form with a tubular sleeve G2 located within the stem A, through which
sleeve G³, the motor screw B freely passes.
The
This carrier sleeve G2 is plain on its interior, but is slotted say on two lateral
sides, and within these slots are provided spring arms H having teeth formed with
partial threads at H' Figs. 3 and 5, so that upon the teeth H' being pressed through
the slots, as is illustrated at Fig. 3, the carrier G will be locked to the motor
screw B and be traversed by its rotation.
Over the carrier sleeve G' is a laterally slotted tube J, adapted to be slidden
lengthways thereon by means of a handle or equivalent J₁ passing through the
lengthway slot A¹ of the tubular stem A; the slotted parts of the said tube J, are
so arranged, that when in one endway position, the spring teeth H' as at Figs. 1, 2,

page_text: and 3 are pressed into engagement with the screw B, and when in the other
positions Figs. 4 and 5 the teeth H¹ are out of engagement, then the locking is.
effected by sliding the locking button J away from the handle G'.
By apparatus constructed according to my invention, the chain, wire, or cord F,
may be adjusted into position, and the spring teeth H¹ not being in engagement
with the motor screw B, the carrier G may be seized by the knob or handle G¹,.
and the slack of the chain, wire, or cord F taken up; this having been done, the
spring teeth H are forced into engagement with the motor screw B by sliding the
slotted tube J by means of its projecting knob or button J¹, into the position
shewn at Figs. 1, 2, and 3, and the screw B may then immediately and effectively
be operated by the handle E to tighten the chain, wire, or cord F without any loss.
of time or inconvenience, and it should also be noted that the handle E, by which
the motor screw B is operated, has no endway or lengthway motion whatever.
During an operation with this instrument a further advantage is, that should the
chain, wire, or cord F require adjustment or removal, the same can be instantly
done by simply sliding the knob or handle in the reverse direction.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In ecraseurs or the like instruments, a motor screwed shaft mounted in or
upon a stem, and provided with a handle whereby it may be rotated but does not
receive endway motion, in combination with a clutch nut constructed to be capable
of engagement with or disengagement from the screw of the motor shaft, the chain,.
wire, or cord being connected to the said clutch nut, whereby the said chain, wire,
or cord is adjusted with a rapid action by sliding the nut, and the latter is readily
coupled to the motor screw for the finish of the operation thereby, substantially as
set forth.
2. An ecraseur or like instrument having a screwed motor shaft in combination.
with a clutching device to which the chain, wire, or cord is connected, such device
being composed of a sliding sleeve around the motor shaft, a handle from the.
sleeve to the exterior of the casing stem, spring toothed arms on the sleeve to
engage the screw of the shaft, and a movable tube upon the sliding sleeve, having
an operating button, whereby the tube may be slidden relatively to the sleeve to
cause the toothed arms to take into or release from the motor screw substantially
as described.
3. The general arrangement and combination of parts composing the ecraseur
or like instrument constructed and acting substantially as and for the purposes.
described and illustrated with reference to the accompanying drawings.
Daren Los Zorn day or
URRI ATUT JO AUD UICZ SIGT DƏT İ
BREWER & SON,
London and Leeds, Agents for the Applicant.
BREWER & SON,
London and Leeds, Agents for the Applicant.