US988702A - Scale-light. - Google Patents

Description

W. J. FREEMAN 6: G. CRANE.

SGALE LIGHT.

APPLICATION FILED APE. 1a, 1910.

Patented Apr. 4, 1911.

7 IN VEN T0125, W. JL Freeman WITNESSES:

S..G-. Crane Arrbm EY.

other parts in section.

"ilhllTlED VVILLIAIWZ J. FREEMAN AND SAMUEL G. CRANE, 0F KANSAS CI'RY, MISSQU FJ scALn-Lisrrfi.

5588,?ll2, Specification of Letters Patent Fetentetl 4 illll il.

Application sled epril 18,

T 0 all whom it may concern:

Be it known that we, Wnzmsm 5. Fires- MAN and In, G. CRANE, hotii: citizens of the United States, residing" at lienses Cit in the county of Jackson and State ofli/lis souri, hinge invented certainnew and useful Improvements in Scale-Light's; and we do declare the following to be a. full, clear, and exact description of the invention. such as will enable others skilled in the art to which it appertsins to make and use the same reference being had to the sceoinpsuying drawings, and to the letters and figures of reference marked thereon, which form zrpart of this specification.

Our invention relates to illuminating de- I l i I n vices 101' scales, and has 101' its-oligect to provide means whereby an electric lamp may be automatically lighted when the scale pan is depressed, and automatically extinguished when the substance weighed has been removed from the scale pan. This object accomplished by the construction herein described, clain1ed, and illustrated in the eccomptmying drawings, in which Figure l is an elevstionof s scale provided with en illuminating device censtructedmc ording to our invention, the i1i-- terior parts being seen through a glass plate. Fig. H is a detail and partly sectional View of the circuit opening and closing device, Fig. H1 is e detail. view of parts shown in Fig. H, the spring being in elevation and Fig. 1V is a detail section on the line ilk-IV of Fig. ll. Fig. V is a, detail section on the line V -V of Fig. H. Fig. Vii. is e detail section on the line VX 71 of ll, showing also the lower pindulum stop. Fig. Vii is.e broken sect B1 on the line VII of Fig. II.

In the sc shown in L, 1 de lgnctes the main housing; 2, the chart frame, and 3, the pen. -22 dc nstes an arm to which movement communicated from the pen 3 and on wl'iich attache-cl s nose iron having a point 6 which engages in insulsted stirrup 7, which sctuatcs u ribbon 8, s

cum 9, and the pointer 10. 1:2 designates the lower pendulum stop, which is secured by a screw 13 to s lug 14- cast in t is housing 1.

The parts so far mentioned are well known and therefore are not described in detail.

In accordance with our invention, an electric lamp 15, carried by e reflector 16, is mounted preferably above the chart I'Z'and 1919. Serial No. 556,691.

by the 15 may shine upon sand chart. The reflector 16 is providedv with supports lSwhicl'i are attached to the frame 2 by the usual screws 19' or in any preferred manner. The chart that is so illuminated is the one that is faced by the salesman, and hence is in shadow in a majority of shops.

The electrical circuit opener and closeto which issecured to the lug 14 by means of the screw 13; the arm being inserted bctween the lug and the stop 12 end being prevented from turning upon the screw 13 by e pin 21 or any preferred device; T49

siilsting plates 32, which are spaced sport place by the screw head. 1

3% designates a Contact screw which passes through plates 32 and is provided with s not 35.

3G designates a spiral of resilient wire (preferably of brass) the inner end of which. is secured to a collar 37, mounted be-- tween plates on :1. screw 3S which has nut 39 for binding the collar between the plates endpreventing rotary movement 01 the spiral wire 36 The er end of the spiral wire may touch eitl of the p 32, but the l'nlllll body of said wire so. clear of the plates, as shown, so that, Very easily movable in its own plan outer end 36" of tlie'wi e 30 is over the contact screw and in l l. I or free condition of me wire 36, touches th some. 'lhc nose iron 5 passes below the tor of the spiral, and h as s-ttsched thereto an. insulating button 40, which touches the cotton; of the spiral 36 and bears upwardly thereon as to hold the end 36" out of con- .iact with screw 34:. This object is eii'ectcd by adjusting the arm 24: vertically min 20, While the scale penis empty and in balance. Contact screw 34; is connected. by s. Wire 4L1 with the lamp 15, and the screw 38 is connected by a wire 42 with the lamp cord at one side thereof so that the light eii'l'ibtetl' be described is supported by an arm 20' upper portion of arm .26 is provided with} by s collar 33; and are firmly secured ll strand 43, the other strand 4% of which is connected with the lamp, the latter thus being in series with the wire spiral 36.

When the scale pan 3 is depressed, the arm l descends, permitting the end 36 of spiral wire 36 to drop into contact with screw 34:, when current will pass through lamp 15 and light same, so that the chart 17 can be easily read by the salesman. As soon as the goods are removed from the pan, the pan and arm 4., ascend, insulation 40 strikes spiral wire 36, and its end 36 moves away from screw 34, breaking the circuit and stop ping the use of current. This operation re duces the cost of current for lighting the lamp 15 to almost nothing.

l Ve wish to emphasize the fact that the parts to which the wires 4L1, 42 are connected are positively insulated from all other nietallic parts of the scale, so that it is impossible for a person to receive a shock by touching the scale.

Having thus described our invention, what we claim as new therein and desire to secure by Letters-Patent is 1. In combination with a weighing scale, having a dial or chart and movable platform parts, of an electric lamp arranged to light said dial or chart, a fixed contact member having connection with said lamp, a spiral spring having connection with said lamp and arranged to bring its outer convolution into engagement with said fixed contact when unrestricted, and an insulated member on one or the platform parts engag l l i l sea /02 ing the outer convolution of said spring and normally retaining same out of engagement with said fixed contact.

2. In combination with a weighing scale, having a dial or chart and movable platform members, of an electric lamp arranged to light said dial or chart, a fixed contact member having connection with said lamp, a spiral spring, the inner end of which is connected to said lamp and the outer end of which is curved to lit over the fixed contact member, and an insulated button on one of the platform members normally pressing against said spiral spring and retaining the hooked end. thereof out of contact with the fixed contact member, substantially as and for the purpose set forth.

in combination with a scale, having a frame lug and a n'iovable part 5, an arm secured to said lug, a second arm attached to said arm, insulating plates supported by the econd arm, a spiral resilient wire mounted between said plates, a contact member carried by one of said plates in close proximity to said wire, an insulating button mounted on said part 5, beneath said resilient wire; an electric lamp, and an electric connection between said lamp and said contact.

In testimony whereof we ai'hx our signaf lures in presence of two witnesses.

WILLIAM J. FREE/IAN. Si'tll .UEL G. CRANE "Witnesses illrn'riin M. JACKSON, ll A. Cannm.

Images