elates to nents in manucuns and Costs
Year: 1889

page_text: Date of Application, 23rd Apr., 1889-Accepted, 24th Aug., 1889
COMPLwTn
SPECIFICATION
y
elates to
nents in manucuns and Costs Certain
features, hereinafter described and claimed.
In the accompanying drawings
Fig. 1 is a side view of the device.
Fig. 2 is a longitudinal section thereof.
Fig. 3 is a transverse section, on line - of Fig. 2.
Fig. 4 is a detail view of the pivoted jaws detached.
Referring by letter to the drawings A designates the tubular handle having an
aperture at the inner end which is provided on one side with a shoulder D, the
purpose of which is hereinafter explained. EE represent the jaws of the device,
provided at their inner ends with the disks F F which are pivoted at their central
points upon the transverse pivot screw G. These disks are provided with radial
slots H H hereinafter mentioned.
I designates a contact-plate which is arranged between the jaws E E at their inner
ends and is attached to the outer end of the operating shaft K. The said shaft is
disposed within the tubular handle and operates between the disks F F, being provided
with a longitudinal slot N to receive and slide on the pivot screw G. This shaft is
provided within the handle with the lateral cars L L which operate between the
disks and are provided with the studs M M which engage in the slots H H.
It will be readily seen that any longitudinal movement of the shaft K will cause a
motion of the jaws either toward or from each other and the motion of the said jaws
will, further, be simultaneous.
If the contact plate I is depressed or forced in the direction indicated by the arrow
in Fig. 1 the jaws will be closed, but if the shaft is operated in the opposite direction
the jaws will be opened.
O represents a lever, the inner end of which is pivoted to the shaft K by means of
a pivot o which enters a perforation in the end of said shaft. The outer end of the
lever O is provided with a thumb-hold R. The latter projects beyond the inner end
of the handle when the jaws are closed and is provided with a shoulder S which is
caused by a spring P to automatically engage the side of the aperture ( when in the
said extended position.
As the jaws are forced together by the gradual depression of the contact-plate the
extremity of the shoulder S will pass beyond the edge of the aperture C and will
engage the shoulder D. Thus the jaws will be securely locked and prevented from
reopening. As the jaws continue to be forced together the shoulder S of the thumb
hold will still further engage the shoulder D and the jaws will be again locked in
the new position. Thus the jaws may be locked in any desired position from
reopening, but their motion toward each other is only stopped when their ends come
in contact.
The operation of the device will now be clearly seen. To apply the handcuff, place
the opened jaws over the wrist and cause the latter to press upon the contact-plate,
thereby closing the jaws and causing them to be locked as they close. To reopen the
jaws, press the thumb-hold laterally to disengage the shoulder S from the shoulder D,
and press the thumb-hold, outward or toward the jaws. Being attached to the shaft K,
the pressure upon the thumb hold will operate the said shaft and cause the jaws to be
moved.

page_text: From the above description it will be seen that the handcuffs are operated entirely
by the thumb hold at the inner end of the handle so that the hand which grasps the
said handle need not be removed or the other hand employed to operate the device.
When the locking means for the jaws are attached to the outer or free extremities of
the latter, the operator must employ both hands to open the handcuffs, and, further,
the appearance of the device is rendered clumsy by this arrangement.
Although no springs are used in this device to close the jaws, the latter, owing to
the arrangement of the operating-shaft and the radial slots in the inner ends of the
jaws close with a snap when the contact-plate is depressed.
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 a handcuff, the combination of the handle A, the jaws pivoted to the handle
and provided with slots H H at their pivotal ends, the contact plate located between
the jaws and having the operating shaft K, provided with studs operating in the said
slots, all constructed and arranged substantially as described.
2. The combination of the tubular handle, the jaws pivoted thereto, the shaft sliding
in the handle and connected to the jaws to operate the same, and a contact plate on
the end of the shaft between the jaws, as set forth.
3. In a handcuff, the combination with the tubular handle having the shoulder D
and the jaws pivoted to the handle, of the shaft K, connected to the inner ends of tho
jaws and having the contact-plate I between the jaws, and the lever or pawl O pivoted
to the shaft K and provided with a shoulder to engage the shoulder D whereby the
jaws may be successively locked in various positions as the contact-plate is depressed
substantially as and for the purpose specified.
4. The hereindescribed handcuff comprising the tubular handle A, having a
shoulder D at its inner end, the jaws EE having disks FF on their inner ends, which
are mounted on the transverse pivot G and provided with the radial slots HH, the
operating shaft K, provided with the longitudinal slot N, operating on the said pivot,
and having the contact-plate I on its outer end between the jaws, the ears L L on the
sides of the shaft between the disks F and having the studs M M, operating in the
slots HH, and the lever or pawl O pivoted to the inner end of the said shaft and
provided with the thumb hold R adapted to project, beyond the end of the handle and
engage the shoulder D when the jaws are closed, and the spring P, for the purpose
specified.
5. In a handcuff, the handle A, the pivoted jaws E and a longitudinally sliding
shaft K to operate the jaws, provided with a contact plate I to close the jaws, and also
having a thumb-hold projecting beyond the handle to unlock the jaws as set forth.
Dated this 23rd day of April 1889.
BERNHARD DUKES,
226, High Holborn, London, W.C., Agent for the Applicant.