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Патент USA US2112044

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March 22, 1938.
Filed OCT.. 18, 1934
Patented Mar. 22, 1938
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Riccard Pudelko, Zug, Switzerland, assignor to
Landis & Gyr, A.-G., a corporation ofV Swit
Application October 18, 1934, Serial No. 748,825
In Switzerland October 25, 1933
3 Claims. (Cl. 20o-_153)
The present invention relates to motor-driven 8 which support a plate 9 carrying the switch
switching apparatus, and more particularly to a
operating motor, the switch contacts and the
motor-driven switch particularly adapted for
switch-operating caInS'- ASernbOdied, the Switch
use in connection with electrically-heated boilers
~c0rnpríses a pair 0f @Ontaets l0 and Il, ccntact
for heating systems.
l0 being mounted on a block of insulating mate-
Objects and advantages of the invention will
be set forth in part hereinafter and in part will
be obvious herefrom, or may be learned by practice with the invention, the same being realized
10 and attained by means of the instrumentalities
and combinations pointed out in the appended
The accompanying drawing, referred to herein and constituting a part hereof, illustrates one
. embodiment of the invention, and together with
`the description, serve to explain the principles
.Figure 1 is a, side elevation of a typical embodi..
ment illustrative of the present invention, with
the cover and certain other parts being shown
'Z'r in section, and
I4 at the rear ofthe block.
. Contact Il is resiliently and movably mounted
by a spring I5 secured to the block l2 by means
The invention consists in the novel parts, construction, arrangements, combinationsv and im15 provements herein shown and described.
of the invention.
v 20
Of the drawing:
5 .
rial i2 Which iS piVOtally Suppcrted t0 the plate
9 by means of pivot pin I3V passing through
the lower portion of the block, andv contact Ill
extends rearwardly t0y form a threaded terminal
Of Screw l5, the rear end 0f the Screw forming
a terminal i? at the rear 0f the block i2. The
Spring i5 is of a general U-Shape, and itS upper 15
free end is attached to a rigid strapV I8 carrying
a cam rOllcr i9.
When it iS desired t0 prOVîde a tWO-pcle Switchl
a duplicate Sct 0f contacts i0 and' || may be
mounted to one side of the first pair of contacts 20
on the block i 2, but inasmuch as these are dupli
cates, Vthey are not described in detail but are
Shown in the drawing.
Motor means are provided fOr Operating the
switching apparatus and for this purpose the 25
Figure 2 is a front elevation of the embodiment
shown in Figure 1 with the cover removed.
magnet 2|) of a small Ferraris motor is mounted
on the rear face of plate 9 and operates to rotate
The present invention has for its object the
motor discZl. Motor disc 2l is rotatably mounted
provision of a novel and improved motor-driven
by means 0f a Shaft 22 in a jeWeled bearing 23
à switching apparatus, particularly adapted for the
contro1 of power supplied to heating systems.
Another object of the present invention is the
provision of a motor-driven switching apparatus
adapted to carry out a normal switching cycle,
and provided with means for interrupting or
35 modifying the normal action of the apparatus.
The present invention is particularly adapted
for controlling the supply of electrical energy to
electrically heated boilers where the power is
40 supplied during _off-peak periods at low rates and
the water so heated is distributed for the heating
of the house or other room as needed during the
and a journal 24. Shaft 22 carries a pinion 25 30
meshing with gear 26 which is mounted on shaft
2l to drive shaft 21 through a friction clutch 28
and against the tenSiOn 0f Spring 29 which has
one end 39 fixed to the shaft 2l about which
Spring 29 is coiled and its other end 3| ñxed to 35
a plate 0I’ bracket 32 fìXed t0 the plate 9. An
abutment» 33 iS mounted 0n the frame plate 9
and serves to limit rotation of the shaft 21 by
cccperatiOn With St0p134- Shaft 27 iS pI‘OVided
with cams 36, correspOnding in number t0 the 40
number of switch poles, and these cams cooperate
with the cam rollers I9 to open the switches
day. In accordance with the present embodiment of the invention, the power is controlled by
45 means of a motor-driven switch controlled in
accordance with a predetermined time cycle, and
optionally operable manual means are provided
for opening the switch after it has been opened
by the motor and other optionally operable
against the pressure of the contact mounting
springs l5.
Means are provided for manually effecting 45
closure of the switches during the time they are
mechanically open, and for this purpose a rigid
strap 40 extends upwardly from the block l2.
Strap 40 is provided with a bent end 4I co
50 manual means for opening the closed contacts.
operating with a latch member 42 mounted on a 50
Referring now in detail to the illustrative embodiment of the invention, as shown in the accompanying drawing, there is provided a base
plate 5 to which a cover 6 is fastened by means of
55 screws 1. On the base plate 5 are mounted posts
spring t3 which extends forwardly from the
plate 9 and is secured thereto. This latch serves
to hold the contact I0, the block I2 and the strap
40 in their normal position, as shown by the
dotted lines. For raising the spring 43 to release 55
the latch 42 and allow the block I2 to move plac
ing contacts I 0 and I I in contact with each other,
a cam 45 is rotatably mounted immediately be
neath the forward end of spring 43 by means of
original position, at which time the contacts I 0
a shaft 46 carried in the cover 6 and connected to
knob. 41. A spring 48 serves to return the cam
45 to its normal position after the fingers are
and I I are out of contact With each other.
When it is desired to close the heating circuit
during a peak load period, it is only necessary for
the customer to rotate the knob 41, thereby re
leasing the latch 42 and permitting the contacts
to move into contact with each other. Thereaf
released from knob 41, while a stop 49 mounted
ter, the contacts are restored to their normal
on the knob 41 cooperates with a stop pin 50
mounted on the cover to limit rotation of the
knob 41.
Means are provided for restoring the contacts
I5 and II to their normal position and for this
latched position upon the next operation of the
motor disc 2| or they may be previously restored
purpose a cam 52 is mounted on shaft 21 between
15 the cams 36, and is adapted to cooperate with
the rigid strap 4I] to move it forwardly to an
extent suflicient to latch it in its normal position.
Thereafter, the contacts remain open until the
. cams 36 are moved to permit them to close.
Means are also provided for opening the con
tacts I G and I I after they have been closed by
the operation of knobs 41, and for this purpose
a cam 6D is mounted on a shaft 6I rotatable in
the cover 6 and connected to knob 62. Cam (illl
is returned to its normal position by means of
spring 63, and is limited in its rotation by means
of stops 64. A bar 65 is rigidly supported with
respect to block I2 by means of a forwardly-ex
'by turning the handle 62.
The invention in its broader aspects is not lim-Í
ited to the speciñc mechanisms shown and de
scribed but departures may be made therefrom
within the scope of the accompanying claims
without departing from the principles of the in
vention and >without sacriñcing its chief advan
What I claim is:
1. A switching apparatus including in combina 20
tion a pivotally mounted contact, a second con
tact mounted for movement with and with respect
to the iirst contact, means for releasably holding
the contacts in a predetermined relative position,
a rotary cam to move said second contact, man
ual’means for releasing the first contact, a cam
to move said ñrst contact after manual release
and manual means for moving said ñrst Contact
tending‘spark shield 66, and is adapted to co
in case the second cam means has not moved
operate With. cam 60 so that by rotation of cam
the’ñrst contact.
60, the block I2 is restored to its normal latched
position, whereby contacts II are spaced from
the cooperating contacts I0.
Stops 49 and 64 maybe apertured so that the
35 apparatus may be sealed to prevent its use by
unauthorized persons.
> ì
A suitable terminal chamber -69 is provided
through which the connections may be made to
the switch contacts ID and II as well as to the
windings of theV motor magnet 20, and the sup
ply oi’ power to the motor magnets may be con
trolled b-y means of a suitable time switch or
otherwise as desired.
During the operation of the switching device,
the contacts Ill and II are initially held out of
contact With each other, but by rotation of the
cams 36 caused by operation of the motor disc
2|, the springs I5 cause these contacts to be
moved together to close the circuit. Stops 33
50 and 34 limit rotation or“ the shaft 21 against the
tension of spring 29, but after the curr-ent sup
plied to the motor magnet 253 is discontinued, the
spring 29 permits the cams 36 to return to their
2. A switching apparatus including in combina
tion a_pivotally mounted contact, a second con
tact mounted formovement with and with re
spect to the first contact, a latch for holding said
contacts against pivotal movement, a rotary cam 35
to move said second contact, manual means for
unlatching said ñrst contact, a cam to restore
said contacts to latched position, and manual
means for alternatively restoring said contacts.
3. A switching apparatus including in combi
nation a pivotally mounted contact, a second
contact mounted for movement with respect to
the ñrst contact, a latch for holding said contact
against pivotal movement, a rotary cam to space
said contacts by movement of the second contact, 45
manual means for unlatching said first contact
to close said contacts, a cam to restore said cone
tacts to latched position after they are closed by
the other manual means and manual means for
restoring said contacts to open position prior 50
to closure by said cam.
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