Improvements in Devices for Suspending Lamps, Balances, and the like.
Year: 1892

page_text: Date of Application, 19th Feb., 1892
Complete Specification Left, 24th Oct., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Devices for Suspending Lamps, Balances, and
the like.
We, ADOLF GRAETZ, Max GRAETZ and ALBERT GRAETZ, all of 31, Lausitzer
Strasse, Berlin, Kingdom of Prussia, German Empire, Manufacturers, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to a device for suspending lamps, balances and the like, in
which we employ the tension of a spring instead of the counter-weights commonly
used for this purpose, and consists in a contrivance for adjusting the tension of said
spring according to the weight which is to be lifted. The mentioned contrivance
is a braking-device which may be applied with greater or less strength.
The form in which we prefer to execute our invention is illustrated by the
accompanying drawing, on which:
Fig. 1 is a plan view of the suspension-device, the eye p being shown in section.
Fig. 2 is an elevation of the device, partly in section.
Figs. 2 and 2 are illustrations of details.
In the centre of the casing G there is fixed, by means of the screw, the axle a
having a nave b at its lower end. To the nave we secure two angular arms c c
which are also connected to the casing G by means of bolts u, and on the upright
ends c¹ c¹ of the arms c we provide pivots d' d' on which rotate chain-wheels d d.
On the axle a there is pivotted the drum A, guided both at top and bottom. Chains e e
are wound on the drum A, as shown in Fig. 2, and the free ends of said chains
are passed over the chain-wheels d d and then descend to the suspended lamp etc.
passing through suitable holes g in the casing G. Within the drum A we place a
helical spring t, as indicated in Fig. 1, of the kind employed in watches and secure
one end of the same to the drum Å, the other to the axle a. The end a of the
latter, outside the drum A, is threaded. On the tops of the drum A. we provide
an upright circular flange k, and within this flange we place two annular discs
and m round the end a¹ of the axle a. Then a nut o is screwed on the threaded
end a', until it compresses more or less, as required, the conical spring-collar n
which is placed round a¹ between o and l. In order that the nut o may remain in
the position which it has been given, the threaded end a' is split longitudinally, and
in the slot is inserted and pivotted by means of the pin a² the click q fitting with a
nose into teeth provided on the periphery of nut o, as shown in Fig. 2. The spring-
collar n is of the form shown in Fig. 2B, being about that of a truncated pyramid,
but we may also employ other spring-collars for this purpose, or also coiled
springs. The nut o is preferably cast in one with the eye p by means of which
the whole device is suspended from a hook in the ceiling.
The operation of the device is the following:
When the object to be suspended is fixed to the chains e-which is done the
chains being completely wound on the drum A. and the said object hanging in the
highest position it is intended to give the same-the click q is turned round
the pivot a² so that the nut o is no more locked and the latter is then turned round
until the spring-collar is sufficiently compressed to prevent the drum A from
turning round the axle a. Then the click q is replaced in one of the indentations
of the nut o. Now the lamp or other object may be drawn down into the position
in which it is used, and secured in this position. When wishing to lift the lamp
into the first position, it is only necessary to release the same. The spring t has
been bent or compressed during the downward movement of the lamp, and therefore
draws the same upward again until the tension of the spring t and the weight of
the lamp have the same momentum.

page_text: The ascent of the lamp cannot become too quick, so as to endanger the same, the
spring-collar n acting as a brake.
It will be seen that our improved suspension-device is readily adjusted to lamps
or other objects of different weight.
D
גד
1000
COMPLETE SPECIFICATION.
Improvements in Devices for Suspending Lamps, Balances, and
the like.
We, ADOLF GRAETZ, MAX GRAETZ and ALBERT GRAETZ, all of 31, Lausitzer
Strasse, Berlin, Kingdom of Prussia, German Empire, Manufacturers, 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:-
Our invention relates to a device for suspending lamps, balances, and the like,
in which we employ the tension of a spring instead of the counterweights commonly
used for this purpose, and consists in a contrivance for adjusting the tension of said
spring according to the weight which is to be lifted. The mentioned contrivance
is a braking-device which may be applied with greater or lesser strength.
Our invention will be more readily understood by reference to the drawings,
Sheet 1, Figs. 1-2B, left with the Provisional Specification, and to the second
sheet of drawings, which accompanies this Specification.
Fig. 1 is a plan view of the suspension-device, the eye p being shown in section.
Fig. 2 is an elevation of the device, partly in section.
Figs. 2 and 2 are illustrations of details.
Figs. 3 and 34 illustrate a modification.
In the centre of the casing G there is fixed, by means of the screw, the axle a
having a nave bat its lower end. To the nave we secure two angular arms c c
which are also connected to the casing G by means of bolts u, and on the upright
ends c¹ c¹ of the arms c c we provide pivots d' d' on which rotate chain-wheels d d.
On the axle a there is pivotted the drum A, guided both at top and bottom.
Chains e e are wound on the drum A, as shown in Fig. 2, and the free ends of said
chains are passed over the chain-wheels d d and then descend to the suspended
lamp etc. passing through suitable holes g in the casing G. Within the drum A we
place a helical spring, as indicated in Fig. 1, of the kind employed in watches,
and secure one end of the same to the drum A, the other to the axle a. The end a
of the latter, outside the drum A, is threaded. On the tops of the drum A we
provide an upright circular flange k, and within this flange we place two annular
discs and m round the end a¹ of the axle a. Then a nut o is screwed on the
threaded end a¹, until it compresses more or less, as required, the conical spring-
collar n which is placed round a' between o and l. In order that the nut o may
remain in the position which it has been given, the threaded end a¹ is split
longitudinally, and in the slot is inserted and pivotted by means of the pin a² the
click fitting with a nose into teeth provided on the periphery of nut o, as shown
in Fig. 2. The spring-collar n is of the form shown in Fig. 2B, being about that
of a truncated pyramid, but we may also employ other spring-collars for this
purpose, or also coiled springs. The nut o is cast in one with the eye p by means
of which the whole device is suspended from a hook in the ceiling.
In the modification shown at Figs. 3 & 3ª the nut o is made separate from the

page_text: eye p, so that the lamp or other object may be turned round a vertical axis, and
this construction is preferable to that shown at Figs. 2 & 2^.
The operation of the device is the following:
When the object to be suspended is fixed to the chains e-which is done the
chains being completely wound on the drum A and the said object hanging in
the highest position it is intended to give the same-the click 7 is turned round the
pivot a so that the nut o is no more locked and the latter is then turned round
until the spring-collar n is sufficiently compressed to prevent the drum A from
turning round the axle a. Then the click q is replaced in one of the indentations
of the nut o. Now the lamp or other object may be drawn down into the position
in which it is used, and secured in this position. When wishing to lift the lamp
into the first position, it is only necessary to release the same. The spring t has
been bent or compressed during the downward movement of the lamp, and therefore
draws the same upward again until the tension of the spring t and the weight of the
lamp have the same momentum.
The ascent of the lamp cannot become too quick, so as to endanger the same,
the spring-collar n acting as a brake.
It will be seen that our improved suspension-device is readily adjusted to lamps
or other objects of different weight.
Having now fully described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. An adjustable suspension device for lamps, balances, and the like, in which
the spring enclosed in a drum A serves to draw the lamp or other article into
its upper position and may be braked with a force adjustable to the weight of the
said article by means of the spring-collar n or equivalent device bearing against.
the drum A and adapted to be pressed against the same by the nut o which fits
over the threaded end of the axle a and is provided with a suitable locking device,
substantially as and for the purpose described.
2. In a suspension-device of the kind claimed under head 1, a device to lock the
nut o consisting of a click q pivoted to the end of axle a and adapted to engage with
indentations of the nut o, substantially as shown in Fig. 24 of the accompanying
drawings and described with reference thereto.
7"
3. In a suspension-device of the kind claimed under head 1, the modification
illustrated by Figs. 3 & 34 of the accompanying drawings and described with
reference thereto, consisting in making the nut o separate from the eye p by means
of which the lamp or other article is suspended, so that said article may be turned
freely in relation to the eye p.
Dated this 92nd day of Octohan 1000