An Improved Clamping Device, suitable for use in Velocipedes and other Machines.
Year: 1891

page_text: Date of Application, 4th Aug., 1891
Complete Specification Left, 4th May, 1892-Accepted, 23rd July, 1892
PROVISIONAL SPECIFICATION.
An Improved Clamping Device, suitable for use in Velocipedes and
other Machines.
I, LOUIS MARCEL LEJEUNE of 3 Rue Campagne Premiere Paris in the Republic.
of France, Manufacturer do hereby declare the nature of this invention to be as
follows:
The object of this invention is to provide an improved clamping device for
securing removable or adjustably movable parts to the sockets, rods, bars or the
like intended to support the same, the said improved clamp being so constructed
that it may be fixed or unfixed without effort and without the use of any special
tool, and also be free of liability to be damaged or broken by excessive strain in
the act of fixing as is the case with the usual set screws or bolts. The socket:
which is to be fixed on the rod, bar, or tube extending into or through it, or by
or within which the said rod bar or tube is to be fixed by the clamping device, is
provided with two lugs projecting along each edge of a longitudinal slit in the wall
of the socket so that by the act of drawing or pressing together the said lugs the
socket is caused to grasp the bar or the like lying within it in the usual manner..
In place of fixing these lugs together by a screw or bolt and nut requiring a
screwdriver or wrench for moving the same whenever the clamp is to be fastened
or loosened, the screw which fastens adjustably in the one lug projects into or
through a socket in the other lug, an excentrically cut pin passes through the head
of this screw in or above the said socket and bears with its ends upon or in the
sides of the lug. To the one end of the pin is fixed a small lever arm. By moving
this arm by hand the pin is moved in the hole in the head of the screw and acts
to draw the latter upward and press the sockets together when moved into the
relative position therefor. A contrary movement of the lever arm allows the screw
to fall and release the lugs so that the clamp is unfastened.
'
This clamp is applicable to the saddle bar of tricycles, to the pedal pins and
cranks of bicycles, and in general to removable or adjustable parts which may be :
require to be removed for cleaning or adjustment; it is also applicable to chucks
and work-heads of lathes, to drilling machines and in general for the fixing of a
removable part in place, of using setscrews.
Dated this 4th day of August 1891.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
An Improved Clamping Device, suitable for use in Velocipedes.and
other Machines.
I, LOUIS MARCEL LEJEUNE, of 3 Rue Campagne Premiere, Paris, in the
Republic of France, Manufacturer, 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 of this invention is to provide an improved clamping device for
securing removable or adjustably movable parts to the sockets, rods, bars, or the
like intended to support the same, the said improved clamp being so constructed
that it may be fixed or unfixed without effort and without the use of any special
tool, and also be free of liability to be damaged or broken by excessive strain in
the act of fixing as is the case with the usual set screws or bolts. The socket
Price 8d

page_text: which is to be fixed on the rod, bar, or tube extending into or through it, or by or
within which the said rod, bar, or tube is to be fixed by the clamping device, is
provided with two lugs projecting along each edge of a longitudinal slit in the wall
of the socket so that by the act of drawing or pressing together the said lugs the
-socket is caused to grasp the bar or the like lying within it in. the usual manner.
In place of fixing these lugs together by a screw or bolt and nut requiring a
screwdriver or wrench for moving the same whenever the clamp, is, to be fastened
or loosened, the screw which fastens adjustably in the one lug projects into or
through a socket in the other lug, an excentrically cut pin passes through the head
of this screw in or above the said socket and bears with its ends upon or in the
sides of the lug. To the one end of the pin is fixed a small lever arm. By moving
this arm by hand the pin is moved in the hole in the head of the screw and acts to
-draw the latter upward and press the lugs together when moved into the relative
position therefor. A contrary movement of the lever arm allows the screw to fall
and release the lugs so that the clamp is unfastened. This clamp is applicable to
the saddle bar of tricycles, to the pedal pins' and cranks of bicycles, and in general
to removable or adjustable parts which may require to be removed for cleaning or
adjustment; it is also applicable to chucks and work-heads of lathes, to drilling
machines and in general for the fixing of a removable part in place of using set-
screws.
In the drawing,
e
Fig. 1 shows the parts consisting essentially of a block A having the passage b
and the two lugs by pressing which lugs together the passage is diminished- so
B is the
as to hold securely the spigot piece C of any nature inserted therein.
screw which is secured by nut d and carries the cross pin a with excentric swelling c
and lever a Fig. 2. The spigot C is shown as having the bayonet slot gh to engage
with pinj but this is not essential.
Fig. 3 shows the method of assembling the parts..
Fig. 4 is a side elevation.
Fig. 5 is a plan view showing the application of this mode of fastening to a pedal
.crank.
Fig. 6 is an end elevation Fig. 7 a plan showing applied to the head of a bolt
or trunnion.
Figs. 8, 9 and 10 show the system as applied to gripping screws so that no lock
nuts are required.
Figs. 11 and 12 show the same principle but a reversal of the mechanism the
cam with its lever a being used to separate the two parts e and f and so thrust them
outwards in the collar D which is secured.on them by the screw k.
•
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
A clamping device comprising the lugs f and e, the bolt B, the adjusting nut d
and excentric pin a with lever a¹, in combination substantially as set forth.
Dated this 4th day of May 1892.
.
.HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.