IMPROVEMENTS IN TURNSTILES to be as follows :-
Year: 1884

page_text: I, CAMILLO ISLER, of 88 Southwark Street, S.E. in the County of Surrey,
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
TURNSTILES to be as follows :-
"
My Invention consists of an improved method of locking and releasing turnstiles
such as are used for admitting persons to buildings and enclosures.
In carrying out my Invention in practice, I form a portion of the lower end of
the vertical shaft to which the revolving arms of the turnstile are fixed, of a
square section, and I provide a clutch having a central square aperture, capable of
sliding freely upon the square portion of the aforesaid shaft-The clutch is formed
with four bosses or projections upon its under side and the footstep or bearing in
which the lower end of the vertical shaft works, is provided on its upper side with
four similar bosses or projections, the spaces or recesses between such projections
being equal in width to the projections on the sliding clutch so that these
projections may drop into their corresponding recesses, and thus securely lock the
turnstile.
To release the turnstile, the clutch is raised by a light lever pivotted to the
foundation of the turnstile, having at one end a fork, to embrace a flange on the
clutch, and at the other a flat plate to be depressed by the foot.
It will be seen that by this means, the turnstile is capable of being locked four
times in one revolution, and that when locked, should it be attempted to force the
revolving arms round, the strain will be thrown upon the clutch, and not upon the
releasing lever, as in the usual arrangement.
My Invention also enables a turnstile to be rotated in either direction, without
the necessity of shifting the clutch, as in the ordinary plan.-I form the fixed
semicircular enclosure of the turnstile of a flat top or table connected to a
foundation plate or frame, by means of bars or tubes arranged diagonally, so that
they act both as struts and ties, and I am thereby enabled to combine great
strength and stiffness, with lightness of construction.
FAL
L 1004

page_text: "
I, CAMILLO ISLER of 88 Southwark Street in the County of Surrey, Engineer,
do hereby declare the nature of my invention for "IMPROVEMENTS IN TURNSTILES
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:—
My invention relates to an improved method of locking and releasing turnstiles
such as are used for admitting persons to buildings and enclosures.
Referring to the accompanying sheet of illustrative drawings:-
Fig 1 is a sectional elevation of such portion of my improved apparatus as is
necessary to illustrate the invention.
Fig 2 is a plan of the same with the vertical shaft and clutch (hereinafter
described) removed.
Fig 3 is a plan of the clutch.
In carrying out my invention I form a portion of the lower end of the vertical
shaft A to which the revolving arms of the turnstile are fixed, of a square section B,
and I provide a clutch C, having a central square aperture D capable of sliding
freely upon the square portion of the shaft A. The clutch C is formed with four
bosses or projections E upon its under side, and the footstep or bearing F in which
the lower end of the vertical shaft A works, is provided on its upper side with four
recesses corresponding to the four bosses or projections on the clutch, the recesses
in the footstep being equal in width to the projections on the clutch so that these
projections may drop into their corresponding recesses, and thus securely lock the
turnstile.
To release the turnstile the clutch is raised by a light lever H pivotted at H³ to
the foundation plate of the turnstile having at one end a fork I to embrace
a flange J on the clutch, and at the other a flat plate K to be depressed by the
foot.
Thus the turnstile is capable of being locked four times in one revolution, and
when locked, should it be attempted to force the revolving arms round, the strain
would be thrown upon the clutch and not upon the releasing lever as is generally
the case. My invention also enables a turnstile to be rotated in either direction
without the necessity of shifting the clutch as in the ordinary plan. I form the
fixed semi-circular enclosure of the turnstile of a flat top or table connected to a
foundation plate or frame by means of bars or tubes arranged diagonally so that
they act both as struts and ties and I am thereby able to combine great strength
and stiffness with lightness of construction.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
In the construction of turnstiles the arrangement for locking and releasing
the vertical shaft, substantially as hereinabove described and illustrated in the
accompanying drawing.